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- In New England, two convicts stage a prison escape and cross over state lines into Maine. One of them had been scheduled to testify in a major criminal case. They force their way into a home occupied by a widow and her young son. Erskine and Colby lead the FBI's manhunt. Meanwhile, the prisoner who had been scheduled to testify is also being sought by criminals who want him silenced.
- Three men attempt to kidnap a doctor vacationing in the mountains of Washington state. The doctor falls down a steep hill side. One of the three kidnappers is tracking the doctor while the other two proceed with plans to extort $200,000 from his wife. The FBI gets a break when one of those two is arrested for another crime. Erskine and Colby try to pick up the trail of the doctor. Meanwhile, the physician is playing a desperate game of cat and mouse with the man tracking him.
- Michael Staley, a mentally disturbed Korean War veteran, is determined to show he is important. His former sergeant in the service, now a criminal, is imprisoned and recently killed a guard trying to escape. Staley plants a bomb in a Minneapolis high rise building and sends an anonymous note to the FBI demanding his former sergeant be freed. Erskine and Daniels lead the bureau's efforts to find the bomb before it's too late.
- In Denver, almost $1 million is stolen when three thieves tunnel into a bank vault from an empty building next door that they've rented. Erskine and Colby lead the FBI's investigation. The ringleader, who spent all of an inheritance, plotted the crime so he could win back the woman he loves. The weaknesses of the three conspirators will eventually provide the clues the FBI men need to solve the case.
- Erskine and Rhodes are sent to a small town in Oregon with a predominant Asian American population. Evidence has surfaced that one of its residents may have been a traitor during World War II, serving as a Japanese officer without ever renouncing his U.S. citizenship. The one-time officer also was involved in torture during the war. To find the man, the agents eventually must seek the aid of one of the torture victims from the war.
- Thieves steal an experimental form of nitrogylcerin, which is especially volatile. A guard is killed in the robbery and one of the thieves is also killed because he can't take the stress. The thieves recruit Carl Munger, an experienced truck driver who has hauled nitrogylcerin before. Munger is about to become a father and is nearly broke. Rhodes, posing as an out-of-work truck driver, wins Munger's trust and joins him in hauling the explosive chemical. All Erskine can do is follow behind and hope his partner will survive the ordeal.
- Selkirk, a former Army officer, is bitter that he was never promoted beyond major. He breaks out two prisoners from the stockade of an Army base in Arizona. As Erskine and Daniels investigate, it's clear that Selkirk has an impressive collection of weapons. The two prisoners were labeled "incorrigibles" by the Army and their expertise includes demolition. Selkirk's target is a $750,000 Army payroll -- and he has the means and the intelligence to pull off the job.
- A gang of kidnappers preys on middle-class families. Based in Reno, they identify men who have won money gambling, then kidnap their children. Junior, one of the kidnappers, convinces his brother Casey to spare the life of one kidnap victim. Casey reluctantly does so but tells the boy other members of his family will die if they alert authorities. The FBI receives an anonymous phone call after the boy is returned but the boy's father refuses to cooperate. After Erskine and Rhodes start work on the case, another man's son is kidnapped after the man has won $7,500 playing roulette in Reno. This time, the kidnap victim is a diabetic -- who will soon die if he can't get insulin shots.
- Erskine and Daniels spearhead the FBI's manhunt for Belson, an escaped federal prisoner. Erskine captures Belson but, just before that, Daniels is critically injured because of a high fall. The Jeep and the radio of the FBI men has been disabled because of rifle shots fired by Belson. Erskine, miles from the nearest town, must try to bring in Belson while keeping Daniels alive. The devious Belson bides his time, waiting for the right time to strike.
- Erskine and Colby seek to apprehend Arthur Majors, a fugitive who is now part of a Los Angeles-based drug ring. Majors and three others shot two and seriously wounded U.S. border patrol officers in Arizona while transporting drugs. Now, Majors has gone into business for himself. The FBI is in competition with syndicate hitmen to get to Majors first. The life of a young woman, who is fascinated by Majors, is now at risk as the hitmen close in on Majors.
- The mob makes a move to infiltrate fisherman fleets on the U.S. West Coast. Erskine spearheads the FBI's investigation and Special Agent Colby goes undercover as a fisherman. The mob has gotten to a respected leader among the fishermen -- getting him to accept a loan before canceling it. Colby's life will be imperiled as the bureau's investigation proceeds.
- Erskine and Colby are bringing John Omar Stahl, a Ten Most Wanted fugitive, back to the United States. Their aircraft is forced to crash land and Stahl escapes. An injured Colby remains with the plane's passengers while Erskine, nursing his own injuries, tracks down Stahl. The fugitive knocks out a ranger and contacts his brother and a meeting is set. Stahl's brother, meanwhile, has a relationship going with Stahl's former girlfriend. Assistant Director Arthur Ward, already in the San Francisco area, arrives to supervise the search for Erskine and Stahl. Erskine must contend with the elements and a killer who has nothing to lose.
- The murderous Earl Clayton leads four other criminals in an escape from a New Mexico jail. He kills a deputy in the escape and one of the escapees who didn't want to work on a heist Clayton was planning. Eventually, Clayton a young escapee are the only ones still at large. Erskine and Rhodes are sent after Clayton. Before they can reach the killer, Clayton is in a remote lodge with hostages. Erskine, in a desperate bid to prevent more death, changes places with a hunter headed toward the lodge.
- Erskine and Colby lead an FBI raid that seizes illegal gambling equipment being shipped by Arnold Toby, a New York organized crime boss. But that's just the start of the complicated case. Toby's attorney, Richard Bender, gets Toby freed on bail. The arrest is covered in newspapers. Dennis Holland reads of the arrest. His son was arrested and executed years earlier; Bender had declined to represent the son and Holland has held a grudge ever since. Holland manipulates one of his employees, Pete Zacharias, into typing up a death threat and to handle a handgun. Holland plans to kill Bender and make Zacharias the scapegoat. Holland chose Zacharias because his daughter, Carol, is the girlfriend of gangster Toby. On top of all this, Toby imports two out-of-town hit men to kill Zacharias after Carol tells him she's afraid her father threatened Bender, the attorney. In the midst of the case, Erskine gets shot and laid up in the hospital. That leaves Colby to attempt to prevent the murder of Zacharias.
- In Miami, two mobs that are part of La Cosa Nostra are in conflict. Terry and James Cober, two brothers, have taken over a numbers racket started by their father, who has been retired for three weeks. Frank Lanner has been attempting to take it over. The Cobers decide to send a message to Lanner by exploding a bomb in Lanner's garage. The intent was to issue a warning but one of Lanner's bodyguards is paralyzed. Lanner strikes back by having James Cober hit. Now family patriarch Ignatius Cober wants revenge. Erskine and Colby lead the FBI's investigation, intended to prevent an all-out mob war and to smash the Cober numbers racket. The bureau intensifies pressure on the Cobers by raiding six numbers locations it knows about. But Ignatius Cober remains determined to get revenge -- and is will to move even without the blessing of the Cosa Nostra's high commission.
- As Part II opens, Leo Roland is desperate. His close La Cosa Nostra associate, Ed Clementi, has been subpoenaed by the U.S. Clementi is desperate to get out of the rackets but Roland reminds Clementi of the oath he swore to La Cosa Nostra - the La Cosa Nostra comes before family and all else. Roland is prepared to order a hit on anybody Clementi knows who could be a potential witness. Meanwhile, Clementi's nephew, Paul, the hit man known to the authorities as "Cupid," has committed a potential fatal blunder. The FBI has recovered one of his teeth that was knocked loose by Cupid's last victim. Now, FBI Inspector Lewis Erskine has a way to find who Cupid is and to connect him to Leo Roland. The question is whether the FBI's top investigator can reach Cupid in time before he turns murder into slaughter.
- The FBI is on the trail of a confidence man who spins elaborate schemes.
- The son of a wealthy but separated, couple is kidnapped. The abductors are a couple with issues: the man is an alcoholic while the woman is near the end of her endurance in dealing with her husband. On top of all that, the kidnapped boy has become seriously sick. Erskine and Colby lead the bureau's manhunt. But, with the boy's condition worsening, the question is whether they can break the case in time.
- Howard Converse, deep in gambling debt and with a wife in an iron lung, has embezzled $250,000 from the bank where he works. He flees as bank examiners begin their review of the bank's books. Erskine and Colby lead the FBI's search for the fugitive bank officer. Meanwhile, Converse is in danger for his life. Part of his getaway plan calls for riding with an ex-con and his child bride. The ex-con learns who his passenger is -- and he intends to kill Converse and keep the money for himself.
- Michael Riley has been running numbers while working on his brother's truck. He intends to cash out and go off with his girlfriend. But he's now a fugitive from the law after the FBI gets a tip about the numbers running. Riley is also on the hit list of the Cosa Nostra, which wants to shut Riley up permanently. Erskine and Colby lead the FBI's manhunt for Riley, trying to get to the young man before the Cosa Nostra does.
- In California, a gang has stolen weapons from the U.S. military. Erskine and Rhodes are assigned to capture the gang.
- A young man drives to FBI headquarters from Virginia. He is carrying a large amount of cash and has been shot. He also can't remember his own identity. Is he a criminal or an innocent. The title stems from the story of blind men trying to establish what an elephant looks like by feeling different parts of the animal. That story summarizes the challenge facing Erskine and Rhodes as they try to reconstruct what happened. On top of that, a pair of hit men are stalking the boy.
- Vincent Gray, just before being released from prison, is given the kiss of death from La Cosa Nostra. Erskine sees an opportunity for a breakthrough in the bureau's ongoing war with the Mafia. If the FBI can pressure Gray successfully, it can gather information to put away Mafia officials. Meanwhile, La Cosa Nostra intends to make good on the kiss of death that Gray has received.
- Three men rob a Northern California resort of $200,000 in currency and jewels. They cross the state line into Oregon, bringing the FBI into the case. Erskine and Colby take charge of the investigation because they're already in the general area. The airplane the men fled in has been disabled. They split up and two of the men abduct a couple rafting on a remote -- and hazardous -- river.
- An Eastern Bloc courier is shot and captured at an airport while entering the U.S. The courier had hidden tape intended for a mysterious operative known only as "Alexander." Erskine goes undercover, taking the place of the courier. He quickly discovers the situation is more complicated than he imagined. The FBI inspector is now in the middle of an espionage ring with conflicting allegiances. Alexander is loyal to Moscow, while other members now are loyal to China. On top of that, the courier Erskine is portraying was hired to kill Alexander. Colby and other FBI men can only keep track of the FBI inspector from a distance.
- A woman who recently had a miscarriage takes a baby left in the front seat of a car. She intends to raise the child as her own and her husband can't talk her out of it. The husband, desperate for money, decides to seek ransom from the father, a newspaper publisher. Erskine and Colby, after their investigation gets underway, learn of an additional complication. There is an outbreak of the plague in the city where the kidnapping has taken place. The kidnapped child has been infected.
- In St. Louis, a gold cross dating back to the Crusades is stolen. Erskine and Daniels oversee the FBI's investigation of the crime. Meanwhile, a series of double crosses take place. The FBI men must move fast because one ex-con, who has become involved after the theft, intends to melt the cross the down.
- After a border patrol officer is found dead, the FBI begin investigating the operations of a wildcat oil company. What they discover is way beyond just a simple murder.
- Steven Harber, in debt with a pregnant wife, is also on the jury for the federal trial of a Cosa Nostra leader in San Diego. Harber takes a $5,000 bribe while at work at a filling station, with the promise of another $5,000 after the trial. But a co-worker witnesses the bribe take place. After the trial ends with the jury deadlocked, the co-worker puts the squeeze on Harber. Harber already feels guilty. Harber himself calls the U.S. Attorney hinting about jury tampering. Erskine and Colby enter the case, determined to find if a bribe took place. Before the case is over, one man will die and the reputation of another juror, who died after the trial, will be at risk.
- Beau Parker, a Ten Most Wanted Fugitive for bank robbery, and Cass Linden have teamed up for a series of thefts. The pair make a stop at the Tennessee town where Cass grew up and visit her little sister Mary Ann. Mary Ann opts to leave with them. It turns out Mary Ann likes the criminal life - and may be more than willing to kill. Erskine and Colby track the group across multiple states. Meanwhile, Beau is planning his biggest job yet.
- A mentally-ill woman abducts the infant she is babysitting, and Erskine and Rhodes track her across several states. The FBI agents must figure out the kidnapper's motivations and why the date of April 2 is so significant to her.
- Mario Dracus, a New England boss for the Organization, is on trial. He expects to be convicted but, suddenly, is free when a mistrial is declared. Dracus is among the most surprised people in the federal courtroom -- this is not his doing. The FBI investigates whether the jury has been tampered with. Erskine and Daniels, in the course of the probe, confirm that some of the jurors have been threatened. The FBI concludes the bought jury was a way for the Organization to get Dracus out of the way so younger members can take over.
- A company aircraft of Colton Industries, a Detroit-based defense contractor, explodes in mid-air. The incident kills one of the parters of the company, who was headed to Washington. He was killed because he was going to blow the whistle about defective aircraft components that Colton Industries was shipping to Vietnam. As Erkine and Rhodes investigate, Assistant Director Arthur Ward takes an interest in the case because he's a friend of Mrs. Colton. The title of the episode is explained by Ward, who likens the story of the camel forcing its way into a tent to the way the bureau formerly operated, when it performed political favors.
- Erskine is acting as bodyguard for Maria Sandoval, cousin of a Latin American dictator, to Washington. Once there, she will testify before a Congressional committee how her cousin, and the leader of her country, is affiliated with Communists. The FBI investigator doesn't know that one of the passengers on the flight of a small aircraft is an operative of Maria's country. His orders are to prevent her from testifying at all costs. The small plane is forced to crash land. The question is who will survival the ordeal and who won't.
- Abel Norton, personal manager for diva singer Darlene Clark, snaps. His son has died in an operation. Darlene had told Abel she'd arrange for a top surgeon to perform the operations but -- unconcerned with others -- never bothered to follow through. Now, Abel has kidnapped Darlene's daughter as the singer prepares to open a show in Las Vegas. Erskine and Daniels have to cope with a less-than-cooperative Darlene while trying to apprehend the kidnapper. Meanwhile, Abel has an unusual ransom demand -- he wants Darlene to tell the audience about a hit-and-run accident in Indianapolis she was involved in three years earlier. Abel wants Darlene to expose her true self before the audience.
- The Caldwell family is part of a Communist Cell in the San Francisco Bay area. The cell plans to blow up a U.S. ship sailing from Oakland to take war supplies to Vietnam. Erskine and Rhodes lead the FBI's investigation, which begins when Lester Milton is found murdered. Milton is a former Communist who renounced the party. John Caldwell, patriarch of the Caldwell family, is really Milton's brother. Milton was spotted by Communist operative Conrad Letterman, who is the mastermind behind the scheme to blow up the ship. The FBI races to apprehend Letterman, not knowing the full extent of the plot. Betty Caldwell, the 20-year-old daughter of John Caldwell, faces a crisis. She's in love with a Navy doctor who has been assigned to the ship at the last minute.
- An aging thief, assisted by younger accomplices, steals a 31-karat, legendary diamond. The plan goes awry almost immediately when one of the accomplices wounds himself with a pistol belonging to the jewel's owner. The remaining thieves don't trust each other. Erskine and Colby oversee a multi-state manhunt, trying to cut off any way the thieves can either fence, cut or ransom the large diamond. Before the case concludes, much treachery will unfold.
- The Gray Passenger is when death visits a ship. Exactly that has occurred when a former president of a South American country has been murdered on a ship sailing off the Carolina coast en route to South America. The political situation in that nation is explosive, spurring the FBI to send agents Erskine and Rhodes to investigate. Erskine is the lead investigator while Rhodes poses as a sailor. The FBI men face many dangers. The murder is part of a plot that involves piracy and political intrigue.
- A chemist, facing escalating medical bills because his daughter may lose her leg, steals flasks he thinks contains a new lotion. In reality, he has taken a powerful bacteria that will wipe out all forms of life within a certain area. A spy, Jago, wants to sell the bacteria to a country hostile to the United States. Erskine and Rhodes are dispatched to track down the missing flasks which have the potential to wipe out millions of lives.
- A bank in Baltimore is robbed. The crime was obviously well planned. Yet the criminals only steal $12,000 when much more could have been taken. Erskine and Rhodes dig deeper to find a deceased bank robber in the 1940s would rob a small bank as a practice run before striking a richer target. Now, the FBI must comb through all the dead robber's cell mates to find who is adopting his tactics. A missing button from the Baltimore robbery will prove to be a major clue.
- A former convict recognizes another ex-con, known as the "Iceman," arriving at a Los Angeles apartment building. The former convict drives to a telephone booth at a nearby drive-in and attempts to call the FBI. The Iceman intercepts him and stabs him with an icepick in the chest. The Iceman flees, but the convict survives long enough to get another man to call the Bureau. Dying, the former convict provides the FBI with information about the Iceman. It turns out the killer is part of a gang of bank robbers led by Scott Martin. The gang has already killed two people, used as hostages, in past robberies. Martin, meanwhile, has gotten involved with a single mother and her 10-year-old son. Erskine, who was supposed to be in the Los Angeles FBI office briefly, is charged with organizing a raid on the apartment building where the gang is. Over the next 97 minutes, the 10-year-old boy will be used as a hostage, the mother will enter the apartment building to try to protect her son and the gang will engage in repeated shootouts with Bureau agents. It is an encounter that will lead to the death of some of the participants.
- A criminal conducts a bank robbery in Lincoln, Nebraska. The robbery nets $12,000 but is only a preliminary job. The criminal's next job involves robbing a New York City department store. To do that, he'll recruit a team while also romancing a woman he met a few months earlier. Erskine and Colby move across multiple states while on the criminal's trail.
- A prison break turns deadly when a sheriff's deputy is murdered by one of the fleeing prisoners. The FBI is summoned. Erskine and Colby discover the case is more complicated than it appears. The key escapee is an expert at digging tunnels to attempt bank robberies. The organizer of the job plans to tunnel to a bank vault in New York City that contains $15 million at any one time.
- Kidnappers abduct a young woman, believing her to be the daughter of a millionaire. In reality, she's the daughter of a middle-class couple who had been driving the car of the intended victim. Erskine and Colby lead the FBI's investigation of the case. But the daughters of the victim don't have the means to raise the ransom. Meanwhile, the rich father of the intended kidnap victim doesn't want to provide the ransom because it would violate the principles he has lived with all his life.
- A robbery of an armored car in Michigan goes badly. But one man, the getaway driver, escapes. The robbers weren't aware of how large a target was involved. The armored car had $500,000. The driver tries to cut a deal with the mastermind of the holdup but is double crossed. The driver, though, manages to escape with all the money. Now, the FBI -- led by Erskine and Colby -- is after the thief along with the criminal who planned the robbery.
- Max Griswold has been on the run from the law for years and has established a new life for himself. But David Spiers, one of his former confederates, has identified him while plotting a robbery that could yield $3 million. To ensure Griswold's cooperation, Spiers has set up a kidnapping of Griswold's estranged son. Meanwhile, the kidnapping of the younger Griswold has come to the notice of The FBI's Inspector Erskine. The FBI man believes there's more to the kidnapping of the young Griswold than appears on the surface. Meanwhile, the gang that Spiers has recruited has run into complications in their planning for the plot they think will yield millions of dollars.
- Max Griswold, desperate to save the life of his kidnapped son, has figured out how to stage a robbery that could yield at least $3 million. Erskine and Colby, meanwhile, diligently follow up leads as Erskine figures out the plot. The FBI needs to capture the gang while trying to save the life of Griswold's son.
- A Cosa Nostra "fixer" is hit in Newark for bungling an attempted bribe. But the killing is witnessed by a teenage girl. She narrowly escapes but left behind her yearbook. Erskine goes undercover in Florida to gather evidence against the Mafia official who ordered the murder. Meanwhile, the Cosa Nostra "high commission" orders that the girl be liquidated. If Erskine falters in his assignment, the good is as good as dead.
- A man working for La Cosa Nostra is on trial. The man who recruited him into the criminal organization believes he will crack during the trial and arranges for him to jump bail and flee the country. Erskine and Colby lead the FBI's pursuit; the man's testimony is needed to incriminate La Cosa Nostra members. Meanwhile, the commission of La Cosa Nostra wants the man dead and has ordered a hit. On top of all that, the fleeing man's wife, who is seven months pregnant, is with him and her condition threatens her life and her unborn child's.
- Victor Kiley, a wanted fugitive, barely escapes after lawmen attempt to take him and an accomplice into custody. Kiley abducts a woman and her 16-year-old son as he tries to stay one step ahead of law enforcement, led by the FBI. Erskine leads the FBI's manhunt for Kiley, aware the wanted man has forced the woman and her son to accompany him. Erskine gambles with his own life to ensure the wanted man is taken into custody.
- Hazlett, a member of the Cosa Nostra and under a death sentence by the criminal organization, is desperate. He hijacks an older plane headed to Jacksonville, Florida. The FBI, led by Erskine and Colby, races to find Hazlett's daughter, who is likely being sought by the Cosa Nostra to use as a lever against her father. Onboard the flight, Hazlett shoots a passenger trying to stop the hijacking. Meanwhile, a Cosa Nostra hitman is sent to kill Hazlett, no matter what.
- A painting worth $500,000 is stolen from a Washington museum. A former U.S. government official is seriously injured trying to stop the theft. The thief flies to Los Angeles, intending to sell it to a collector the thief has done business with before. The thief, though, gets more than he bargained for when he meets a woman who falls for him. Erskine and Rhodes don't have much to work with. The FBI men begin to put pressure on the collector. Meanwhile, the thief concludes he'll need to kill the woman to ensure her silence.
- A man hijacks a plane bound for Seattle. He forces it to fly to Alaska, where it is to refuel before heading to Harbin, China. The hijacker turns out to be a U.S. scientist. Assistant Director Ward tells Erskine the man and his knowledge must not be allowed to reach China -- at any cost.
- Operating on a tip, Erskine and Rhodes arrest Charles Burnett and Allen Cole just before they were going to commit murder and kidnapping. The tipster was Burnett's former wife, for whom he still has feelings. The ex-wife flees before the duo can be tried for conspiracy to commit kidnapping. Now, the FBI agents and the conspirators are in a race to get to the ex-wife first. She has fled to the Florida Keys, where she was raised, just as a hurricane is closing in. Erskine and a wounded Rhodes are with the ex-wife as Burnett closes in.
- A high-ranking executive of a Los Angeles bank is running a loan shark operation on the side. His son-in-law is a famous former football player and U.S. military veteran. The bank executive is using the son-in-law to attract servicemen to the loan shark operation. Erskine dispatches Colby to go undercover as a serviceman with a bad credit rating who needs money.
- A sophisticated hijacking operation steals specific shipments of vital products and arranges for them to be sold behind the Iron Curtain. Manning Fryes, an executive with knowledge of the shipments, is having an affair with a woman close to the hijacking ring. Erskine and Rhodes lead the FBI's probe. Fryes is under pressure to cooperate one last time, in this instance involving a shipment of $7 million in gold.
- George Bellamy, married just three months, has gotten another woman pregnant. That woman's brother meets Bellamy in a cabin in a national forest in the middle of a fire alert area. A fight breaks out. Bellamy accidentally kills the man. Bellamy, desperate, starts a fire he knows will set off a broader blaze to cover up the crime. As it becomes evident this was no accidental fire, the FBI is called in to investigate. as Erskine and Rhodes piece things together, Bellamy finds himself in deeper and deeper, especially after his pregnant girlfriend dies in the hospital.
- Erskine and Rhodes are tracking a man who seduces and then kills wealthy widows. Can they reach him before he kills again? It turns out the killer has deep psychological issues about being adopted. Erskine is able to use that fact to his advantage in the investigation.
- The FBI, investigating the theft of plans for a new cobalt bomb, comes across a Communist spy ring. One of its members is Juliet Sinclair, who runs an Asian orphanage and also an operative for Red China. She is flying to Los Angeles to take a girl from the orphanage to a couple, the Kenyons. The girl, however, the night before the trip, discovers Juliet Sinclair's secret. What the girl doesn't know is the Kenyons are part of the same spy ring. Erskine and Rhodes must not only recover the missing information but also are in a race to prevent the girl from being liquidated by the Kenyons.
- A member of the Organization, Albert Dirks, has a grudge against a county prosecutor, William Sanders. Sanders was responsible for sending Dirks to prison, during which time his wife died. So Dirks has put out an unauthorized contract on the prosecutor. Dirks has hired Alex Tanner, who likes to kill his victims with bombs. Tanner's first attempt injures another man instead. Because the murder attempt took place on federal property, the FBI is assigned to the case, with Erskine and Colby spearheading the investigation. The Organization wants no further attempts made on Sanders. But Tanner, whose sanity is in question, feels he must finish the job to maintain his "reputation."
- Paul Nichols, a long-time member of the Cosa Nostra, over 30 years organized the mob's illegal gambling network. He kills Denton, a Mafia member who has been skimming off the top. But the killing was done without a vote from the Cosa Nostra's "commission." Complicating the situation: Nichols has taken possession of "the book," a list of codes necessary to the running of the gambling operation. The FBI learns through an informant that Nichols may be participating in a high-stakes poker game. Erskine recruits Doc Cameron, once a successful gambler who was nearly killed by the mob. Cameron also has been invited to the poker game and Erskine goes undercover as Cameron's "silent partner." The Cosa Nostra's commission, meanwhile, decides to hire hit men who will murder everyone at the poker game and make a grab for "the book."
- A high-ranking scientist at a major company is part of a Communist spy ring. He is about to turn over notes from a top-secret project. Then he discovers his wife has left home. That's a blow to the ego of the scientist, and he goes off looking for her. Meanwhile, the FBI has already arrested one of the scientist's confederates. Now both the bureau, led by Erskine and Colby, and the Communist agents are in a race to reach the scientist first.
- Erskine and Daniels pursue Greg Davidson, who escaped a federal prison just one year before his five-year term was up. Davidson was convicted of trying to blackmail a congressman. It turns out that the blackmail plan was devised by Mason Hammond, a prominent columnist and author, as a way to get out from under his gambling debts. Davidson wants revenge on Hammond and is determined to get it.
- In Louisville, Kentucky, a team of four men robs an amusement park of more than $1.8 million. But the mastermind of the plot double crosses the others and gets away with all the money. Now, the three robbers and the FBI are after the same man. Erskine and Colby follow a trail from Louisville to Cincinnati to St. Louis as the investigation unfolds. Meanwhile, the man who planned the robbery returns to his home in San Diego, his wife unaware of the double life her husband has been living. The bureau apprehends one of the robbers in St. Louis, the first major break in the case. With that arrest, the mastermind knows the pressure on him will intensify.
- John Whiting is part of a Communist espionage ring. He specializes in blackmailing leading executives of defense contractors. Hugh Zimmerman, one of his targets, balks and the two engage in a vicious fight. By accident, Zimmerman falls out of a hotel window to his death. Whiting's superiors pressure him to come up with an alternate way to obtain information on a top secret U.S. project. Erskine and Colby are assigned by the FBI to investigate Zimmerman's death and end the spy ring's activities.
- In the first episode, Erskine and Rhodes are assigned to track down Francis Jerome, an extortionist who has escaped from a federal prison in Pennsylvania. Erskine must also confront a number of personal issues when a woman involved in the case takes a liking to him. We're told Erskine's wife died "in an ambush meant for me." Francis Jerome also has a lot of personal issues. It turns out he is a psychopath who is killing young women and his psychological issues stem from the way his grandmother (who raised him) kept him in long hair and frilly shirts.
- Erskine and Rhodes investigate a group of saboteurs in San Francisco. The title refers to the wife of one of the saboteurs. The wife, who is Japanese, is unaware of her husband's illegal activities.
- An ex-college football player serving a prison sentence for bank robbery, escapes. He is a runner again, trying to capture a lost love, trying to recapture part of his past. Erskine and Colby lead the FBI's manhunt, which leads to a remote part of Oregon. Erskine and another agent perform a parachute jump as part of the effort to capture the escaped prisoner.
- The son of a prominent New England industrialist has been kidnapped. Erskine's investigation is complicated when the father receives two ransom notes. One is genuine, the other a "satellite," an extortion demand by someone not actually involved in the kidnapping. Erskine believes the second ransom note is the real article; its phrasing points to a younger person. But the FBI must cover both ransom drops. Meanwhile, the real kidnapper grows more volatile, endangering the life of the kidnap victim.
- Erskine and Rhodes are investigating Johnny Albin, a "juicer," who makes loans to desperate businessmen and then uses his leverage to take control of their companies for La Cosa Nostra boss Mark Vincent. Erskine hopes to use Albin to get to Vincent, who controls a savings-and-loan and other legitimate business fronts. One of Albin's businessmen victims is hesitant to help the FBI for fear his wife and daughter will be killed or injured.
- Erskine and Colby criss-cross the country as they seek a gang of bank robbers led by Larry Kulhane. In Nebraska, two police officers have been injured trying to apprehend the gang. That's where the trail begins for Erkine, who will travel to Seattle, Atlanta and Charleston, South Carolina, during the investigation. Kulhane's ultimate target is Ardyth Nolan, a wealthy, strong-willed older woman, who has more than $200,000 in her home after liquidating some investments. Kulhane has one man in the Nolan home as the new butler. Another one of his men has gotten friendly with Nolan's college age granddaughter, her closest living relative. If Kulhane finds the money, he intends to kill Mrs. Nolan.
- A pornographer that Erskine has been pursuing is about to flee the country. Before he can do so, the pornographer is kidnapped. Now, the FBI man has to smash the kidnapping plot. But if successful, Erskine will, in effect, help the man escape.
- Karl Schindler, a former Nazi officer who ran a concentration camp during World War II, is now a Communist spy. Otto Mann, a Nazi hunter, nearly arrests Schindler on a cruise ship headed to New York. Mann is a friend of Erskine and wants to assist the FBI. But Mann's wife died at Schindler's concentration camp. Erskine is uncertain whether Mann will attempt to gain personal revenge; the FBI man wants to capture Schindler alive for his knowledge of U.S.-based agents.
- Rudy Keppler, a New Orleans mob boss, has been hiding in Haiti for a year after rivals tried to kill him and murdered his brother Richie. Keppler now decides to return to the U.S. to avenge his brother's death. Erskine and Daniels are assigned by the bureau as Keppler arrives and a struggle ensues for control of the New Orleans branch of the Organization.
- A juror in a trial in Oregon turns up dead. It appears to be an accident. In reality, it was the result of a fight after the juror decided not to accept a bribe from George Owens, desperate to keep his son from being convicted. The FBI is called in at the request of the U.S. Attorney's office. Owens now intends to pressure another member of the jury by threatening the man's wife. With jury deliberations underway, Erskine and Colby move to protect the wife of the juror before it's too late.
- Harlan Slade, with a record of plotting bank jobs, escapes from prison and goes on the FBI's Ten Most Wanted List. Erskine and Daniels take the lead in the bureau's investigation. Their main lead is how Slade has a number of family members in Kansas. But Slade already is planning his next caper. He is targeting Scottsdale, Arizona, near Phoenix, one of the wealthiest American suburbs. He has a bank in mind and his plan is underway.
- Lynn Hallett has been implicated in a bank robbery, including an eyewitness identifying her as one of the participants. Erskine isn't convinced and presses on with his investigation. After a wounded bank guard dies, Lynn flees in the company of her boyfriend, Mike James. But James intends to participate in robbery in Long Beach, causing Lynn to reconsider. Erskine and Colby track down the real bank robbers and try to catch up to Lynn before it's too late.
- A disturbed young man blows up a freight train. He is now blackmailing the railroad -- he'll do the same to a passenger train unless he is paid $100,000.
- Gus Benderson, a colorful safe cracker, has been recently released from prison. He participates in a jewelry heist that goes bad when one of the three participants is wounded. Benderson then visits his son, Robert, who hasn't seen his father for years. The younger Benderson is just starting a life of crime -- and refuses to listen to the warnings of his father. Erskine and Colby are on Benderson's trail, which leads to Southern California, where the younger Benderson lives. Father and son are going to do a big job before Gus retires.
- Mrs Daley is kidnapped during a house robbery. The FBI become involved when it seems the criminals are trying to make for Mexico. Mrs Daley realizers her chances of staying alive are directly related to her ability to remain useful to the kidnappers
- Erskine and Daniels are on the trail of a gang that has stolen $20 million in travelers checks. The gang has been promised 10 percent, or $2 million, upon delivery to a fence. The fence, however, will now only pay $500,000. The gang's leader has other ideas. The FBI tries to catch up to the gang before the travelers checks can be transported to Hong Kong.
- Erskine and Colby lead the manhunt for escaped prisoner Arthur McBride. McBride is a genius and a ruthless, borderline psychopath and more than willing to kill to accomplish his means. The FBI men will follow a trail from Kansas to Chicago to Miami. The question is whether Erskine can corner his quarry before his next big job: robbing an armored car on its way from a race track.
- In Los Angeles, La Cosa Nostra has mounted an effort to infiltrate businesses owned by African Americans. Erskine and Colby lead the FBI's investigation. One businessman already has been left severely beaten when the FBI men enter the case.
- Erskine and Colby investigate the theft by a spy ring of a material important to the U.S. space program. The operative who committed the theft, Ralph Stuart, was wounded. Bleeding, Stuart seeks refuge at the home of an old Army buddy, who had been a medic.
- Convicted murderer Larry Drake is freed during a brazen escape that results in the deaths of three law-enforcement officers. One of them was a good friend of Inspector Lewis Erskine, who was the godfather to the man's oldest son. Steve Drake, the killer's brother, has organized the escape and another brother, Eddie, was a participant. But Larry, in love with Steve's wife, has his own plans.
- Leo Roland, one of the chiefs of the Cosa Nostra, invokes the Fifth Amendments repeatedly when called before a federal grand jury in New York concerning a fraudulent bankruptcy. But his attorney, Carl Munroe, has learned the U.S. has turned up a witness that could get the mafia leader indicted. Roland, following a meeting of the Cosa Nostra's council, orders a hit on the witness, which is carried out by Paul Clementi, nephew of Ed Clementi, the other primary Cosa Nostra leader. Ed Clementi is unaware his nephew is Cupid, so named because he shoots his victims twice in the heart. Inspector Erskine, in New York already on grand jury business, takes charge of the investigation. Roland taunts Erskine, which makes the FBI man all the more determined to nail the Mafia leader. Over the course of the probe, things become complicated. Chris Roland, Leo Roland's estranged daughter and now a nurse, has fallen in love with Paul Clementi. Chris is also a close friend of Flo Clementi, the estranged wife of Ed Clementi. Leo Roland holds Flo responsible for her husband turning "soft." Erskine's investigation leads to a secret Mafia weapons drop. Meanwhile, Leo Roland is willing to order a hit on anyone he feels threatens his power.
- A man and woman specialize in a certain type of con. She seduces rich men while he prepares elaborate forgeries of historical documents that's also part of the bait. Their latest con involves phony papers supposedly written by Benjamin Franklin. Erskine and Colby are on their tail. The woman is falling in love with her latest target. But the man has been joined by his estranged wife -- and she has her own ideas how to proceed.
- Erskine is directing an investigation involving art forgeries of Frank Stocker, a Los Angeles-based chieftain of La Cosa Nostra. The investigation takes a sudden turn when the curator of a Houston museum turns up dead. Stocker is seeking the approval of the Mafia's High Commission to expand his operation, which involves producing forgeries of paintings and selling them to museums, foundations and other buyers. The weak link in Stocker's plans is Christopher Simes, a talented but erratic artist who is painting the forgeries. The High Commission approves of Stocker's plans, but only if Stocker's friend, responsible for the killing in Houston, is hit. Erskine and Colby race to save the killer's life so they can pursue the case against Stocker.
- In Pennsylvania, two of three bank robbers are slain and the haul is stolen. The third robber is taken into custody and admits he was part of the robbery but isn't able to provide Erskine many details. Meanwhile, George Wilson and James Reed, who killed the robbers, have traveled to northern California, intending to pull another job. A third man, who set up the killing of the banker robbers, tries to flee the country but is captured by Erskine and Colby. At the same time, Wilson, who has gotten a job at a winery in California, has fallen in love with Lisa, who runs the winery. Wilson wants to give up on the planned job but Reed won't let him. The FBI is on the trail of Wilson and Reed but the question is whether the bureau can catch up to the criminals in time.
- Daniel Sayres, son of a war hero, pretends to be an Air Force officer to seduce well-to-do women into marrying him for their money. One such scam has gone badly, with the new bride confronting Sayers only hours after they were married. In a rage, he kills her and the case attracts the interest of the FBI. Sayers is forced to seek a new target. Erskine and Colby begin to put the pieces together. The question is whether they can solve the puzzle in time to prevent another death.
- Erskine and Rhodes are sent to Milwaukee to investigate a truck hijacking. The FBI thinks it is the work of an interstate hijacking ring. In reality, it was organized by an employee of a trucking company who was forced to retire. At the same time, Erskine tries to make time to visit his uncle, who suffers from being alone.
- Ten years after a controversial espionage trial, the son of one of the defendants tries to kill the judge. Erskine and Daniels head up the FBI's investigation of the attempted killing. The FBI men want to prevent a second attempt on the judge's life. But the bureau investigators must delve deep into the earlier case to find the clues they need.
- One member of a gang that robbed more than $1.8 million has been arrested in St. Louis. Under questioning from Erskine and Colby, he reveals the names of two other members of the gang but says he doesn't know the identity of the mastermind behind the holdup. The gang only knew him as "the salesman." The FBI apprehends another gang member in St. Louis. Meanwhile, the last member has figured out "the salesman" is in San Diego. The FBI, under Erskine's direction, also now seeks the mastermind in San Diego. The question is who will reach "the salesman" first.
- A member of the Organization has supervised the hijacking of a load of whiskey. But the job didn't go smoothly, leading to a severe injury to the driver. The FBI is assigned to the case because the shipment has crossed state lines. As a result, the Organization wants such hijackings to end until things cool off with the law. The organizer of the job is also told by his superior that his fiancée doesn't meet with the Organization's approval. So the organizer decides to moonlight and do a job on his own, to give him a stake so he and his fiancée can go off on their own.
- John Evans is on the run after killing another ex-con who told him about a family in Pennsylvania who supposedly keeps a great deal of money at home. The fugitive ends up in the company of Jess Orkin, a 14-year-old runaway. Evans manipulates Jess; the boy breaks into a farmhouse and steals food and medical supplies while Evans tries to recover from a gunshot wound. Erskine and Colby are on the trail of the runaways. They hope to get to Jess before Evans commits his next crime -- which almost certainly will result in fatalities if he succeeds.
- A murder at a baseball game is the starting point for an intense FBI espionage investigation led by Erskine and Colby. Steve Ramsey, on the surface, is the successful president of a major corporation. He is really a traitor to the U.S. and under the control of the woman posing as his administrative assistant. Before the case is over, the death toll will increase and Erskine must solve a puzzle that extends back to World War II.
- A $1 million painting is stolen from a museum in Kansas City, Missouri. The thieves initially plan to sell it to a collector in Europe. But when that buyer dies in an accident, they instead seek to sell it back to the museum. Inspector Erskine poses an art expert who the thieves will call upon to confirm the painting is genuine. But what Erskine doesn't know is that he arrested one of the thieves, who has been working in the museum as a volunteer, eight years earlier.
- Ernie Cahn leads a holdup of an armored car near Detroit. Cahn and his confederates had first stolen explosives from a National Guard armory which they then used in the heist. But Cahn, brash and arrogant, traits that will prove his undoing. Erskine and Daniels lead the bureau's hunt for Cahn. But Cahn may not survive long enough to be apprehended by the FBI. Cahn's employers have concluded he's a liability and plan to have to him killed.
- A U.S. Marine is stabbed and seriously wounded, causing the FBI to investigate. Erskine and Colby end up on the trail of a gang who steal firearms from a U.S. military facility. The gang intends to sell the weapons to a group of extremists.
- Danzer, a self-described "nobody," has pulled off a stunning theft of diamonds. He is on the run from Becker, hired by the owners of the stones. Danzer steals a plane but is forced to crash land after a gunshot from Becker has pierced the fuel tank of the airplane Danzer has stolen. Danzer, desperate, kidnaps a blind woman as he attempts to flee the United States. Erskine and Daniels lead the FBI's investigation, seeking to apprehend Danzer before he can get into Mexico. The FBI men are racing Becker to get there first. Becker has his own ideas what to do with the diamonds.
- The youngest son of a millionaire rancher is kidnapped. As Erskine's investigation unfolds, it becomes apparent there's more to the case than appears. The truth evokes Cain and Abel and involves multiple double crosses. With time running out, Erskine races to solve the case.
- Erskine and Daniels lead the FBI's investigation of a kidnapping case in North Carolina. The FBI men quickly discover nothing is as it seems. The target isn't as rich as he's supposed to be. The kidnap victim isn't as innocent as she's supposed to be. The kidnappers are aware of personal information they shouldn't have. As the FBI press forward with their investigation, it becomes clear the suspected kidnapper is mentally unstable and dangerous.
- Tully, a small cog in the Reno branch of the Organization, is in legal trouble. The feds have a witness who can put him in prison. Tully's son attempts a hit on the witness, who is severely wounded. The Organization is not pleased and its operative, Brimmer, tells Tully he wants the son to take the fall. The Organization concludes the son needs to be eliminated. Erskine and Daniels lead the FBI's efforts to bring the son in alive.
- The FBI investigates a group that transports fugitives out of the country. Erskine, again assuming an undercover identity, is sharing a ride with a wounded criminal and his girlfriend.
- Bishop John Atwood, a peace activist, is coming to the U.S. to deliver a speech. He has been targeted for assassination by Anton Christopher, who has never been photographed. The FBI is alerted to the plot by a Manilla police officer, who has been fatally shot by Christopher but lives long enough to tell the FBI what he knows. What neither the FBI nor the bishop knows is that one of the bishop's closest friends is part of the plot.
- Dale Hillman kidnaps and kills the daughter of a police chief. The reason: Hillman had been rejected while applying for a position with the department because of an eye defect. The FBI is called into the case. In the meantime, Hillman joins an extremist group (it's implied it's a neo-Nazi organization, but this specific term isn't used). Erskine infiltrates the group to get the evidence needed to put Hillman away for good.
- Erskine must track down the missing Dr. Gregory Holman while simultaneously trying to convince officials of his government the intelligence operative is dead. He is aided by Holman's wife, who now knows her husband is alive. Yustov, a chess-playing rival of Holman's, also knows Holman is alive and is trying to convince Ambassdor Korvin of that fact. Erskine leads a team of FBI agents that finally locates Holman. But he won't defect until he knows his children, who are still in his home country, are safe.
- A "gopher," angered by the treatment he has received from the head of a mob loan sharking operation in New York, takes a book containing key records. This happens just before a raid by the FBI. Now both the bureau and the mob are seeking the records. The gopher has to grow up fast to stay alive. The question is whether Erskine and Colby can catch him before the mob does.
- Erskine and Colby are on the trail of a con artist who targets lonely, wealthy women. The FBI has entered the case because the man's latest technique involved impersonating a U.S. Navy officer. The man also is suspected of killing one of his victims. As a result, the FBI men have extra incentive to apprehend the man quickly.
- A major jewel collection has been stolen in New York by a group of thieves who had detailed knowledge of the security precautions used to safeguard the collection. But the caper goes awry when one of the men is photographed leaving the upscale jewelry store where the robbery took place. Erskine will risk his life to bring the thieves to justice.
- A two-person confidence team preys on well-to-do elderly people. Irene Galloway is a nurse, whose sunny manner brings people out of their shell, making them willing to confide in her. Carl S. Beaumont then conducts a robbery, knowing precisely what items to seek and where to find them. Erskine and Colby are on the case after Beaumont has taken a rare-coin collection. Now, Irene has been hired as a nurse for Mrs. Whitker, who has a large amount of cash that Beaumont wants.
- Erskine and Colby are on the trail of swindler Robert Charles Pollard. One man is dead, a banker who had embezzled after being taken in by one of Pollard's schemes. Now, Pollard is targeting a bank run by Kate, a former flame. Pressure increases on Pollard after a confederate dies from a fall while fleeing from the law. The question is whether the bureau can catch up to Pollard before he completes another swindle.
- The son of a rich man, Marshall Winslow, is kidnapped. The leader is the sickly and mentally unstable DuPree, who shows he is more than willing to kill by twice shooting the chauffeur who was driving the boy. DuPress wants $300,000 and has no intentions of letting the boy, Dan Winslow, go free. Erskine must contend with the bull-headed Marshall Winslow, who wants to do things his way. The elder Winslow, after initially cooperating with the FBI, goes public about the kidnapping and offers a large reward for information about the crime.
- A Boston company that is developing a new type of laser is the target of a spy ring. One compromised employee is injured at a cheap hotel when the elevator cable snaps. Erskine and Colby are assigned to protect the project. Meanwhile, the spy ring is targeting another employee, who is deep in debt, to entice him to provide the information the ring needs.
- A Mafia hit man uses information about a hit and run accident to try to take over a legitimate business.
- Terry Shelton fakes being kidnapped to extort money from his rich oilman father, Gar. What Terry doesn't know is his girlfriend plans to have him kidnapped for real. She's really involved with criminal Harvey George Windsor. Gar Shelton, headstrong and independent, decides to get his son back without help from Erskine and the FBI. Instead of freeing Terry, the father is captured also. Now, Erskine and Colby must rescue two hostages before time runs out.
- Frank Schroeder is hitchhiking and is picked up by a motorist in the Southwest. Schroeder kills the motorist in cold blood. Now, the FBI has launched a manhunt for Schroeder and puts him on the agency's Ten Most Wanted list. The criminal hooks up with a young Mexican woman. He is now in San Antonio, where there are rumors that a reclusive woman has a fortune in diamonds hidden in her home. Erskine and Rhodes try to trace Schroeder's bloody trail, which will result in the death a pawn broker. Can the FBI bring the criminal to justice before it's too late for others?
- A retired law professor is murdered after warning the Bureau that La Cosa Nostra is gaining a toehold in large housing development. His death brings Erskine into the case. The dead man was Erskine's law school professor, who had encouraged Erskine to join the FBI. Three people saw the killer leave the law professor's home but decided not to go to the police. They think they're safe but a Cosa Nostra kingpin orders they be found and eliminated.
- Jason and Laurie Peale are a father-and-daughter con artist team. Jason is adept as playing the role of a rich big shot to entice his targets. After getting away with one scam, they now travel to Arizona for their biggest con yet. The FBI, led by Erskine and Colby is on their trail. Meanwhile, Jason has made a mistake. He cons the owner of a jewelry store out of a $15,000 ring. The store owner, as it turns out, is in debt to a loan shark. The loan shark knows Jason is a con man - and intends to use him for his own purposes.
- Erskine and Colby are assigned to a case involving the theft of valuable jewels. The FBI men will soon need to unravel a web of deceit, involving a father (who a veneer of being a respectable businessman), his daughter and a thief. The father, seeking to protect his reputation, puts his daughter into peril by hiring a hit man to kill the thief. The question is whether the FBI men can crack the case in time.
- Erskine and Colby lead the FBI's cross-country chase against an escaped federal prisoner. Their quarry seeks revenge against various people he blames for separating him from his estranged wife. The FBI men travel to Los Angeles to Tampa to Peru, Indiana. The escaped prisoner has injured people everywhere he has stopped. It's clear the escaped prisoner obsesses about his estranged wife.
- Kidnappers con the daughter of a rich couple into going out of town. In reality, the young woman has been kidnapped. They are holding the young woman for a ransom of $200,000. One of the kidnappers is the maid of the rich couple. Erskine and Colby take charge of the case. The FBI men need to figure where the kidnap victim is. The mastermind of the plot doesn't plan on the victim saying alive for long.
- Two half-brothers fight for control of a Cosa Nostra family. The conflict is coming to a head as the Cosa Nostra Commission has scheduled a meeting in Chicago. A woman in love with one of the half-brothers is seized as leverage. The case is so important to the FBI that Assistant Director Arthur Ward joins Inspector Lewis Erskine and Special Agent Tom Colby as a bureau team of agents converges on O'Hare Airport. For the FBI team, the question is whether the Cosa Nostra members can be arrested without causing harm to the public.
- Erskine faces problems in his personal life and at work at the same time. His 19-year-old daughter, Barbara, insists on marrying his partner, Rhodes, right now. This puts more pressure on Erskine, who already had misgivings. Meanwhile, assistant director Arthur Ward questions Erskine's approach to catching a bank robber. A man has already confessed to the crimes. But Erskine is convinced the illegitimate son of another bank robber is the real culprit. Ward tells his chief investigator he's being stubborn and questions his judgment.
- Heavily in debt to gamblers, Lawrence Reynolds flies with his girlfriend to Puerto Rico after embezzling nearly $2 million from his bank. A contract man from the gambling syndicate is following them, intending to get the money Reynolds owes them, and not intending to leave him alive. The FBI tries to find Reynolds and his girlfriend before the syndicate man does.
- A U.S. diplomat commits suicide rather than continue to be blackmailed by an Eastern Bloc country. The diplomat's death brings the FBI into the case. The bureau has intelligence that the target of the spy ring is a State Department position paper detailing the U.S. response to a variety of scenarios in the Middle East. Erskine goes undercover and recruits a former woman spy for East Germany to help him. But the case is fraught with uncertainty, including whether Erskine's cover will hold up.
- A married couple robs a Norfolk, Virginia, bank of $27,000. Problem: They have stolen freshly minted bills not yet put into circulation and easily traceable. The FBI, led by Erskine and Colby, is on the case. The couple moves to fence the stolen money. But there's a rift. She has developed a taste for the high life and wants to take more risks. Now, she's prodding her husband to take part in a bigger heist.
- Erskine and Colby pursue a pair of bank robbers from Philadelphia to Oregon. The criminals, Perry and Shep, are an odd mix of urban and rural backgrounds. Perry plans the robberies while Shep (a "redneck" as Perry calls him) specializes in gun play. Their eventual target is the payroll of a tunnel construction project in Oregon. Along the way, Shep is drawn to a woman, who tries to play the criminals off each other. Shep also is a bit of ticking bomb. The FBI agents try to catch the criminals before fatalities occur.
- An Eastern Bloc espionage ring operating in the Los Angeles area is unraveling. One of its key operatives, Jan Anka, has manipulated a draftsman at a missile plant into providing copies of key blueprints. The plant employee's German girlfriend is being held in East Germany -- or so he believes. It turns out the girlfriend has really been dead for eight months. The draftsman attempts to quit the ring but Anka kills him. Now, the FBI has been drawn into the case, led by Erskine and Colby. Things become more complicated. Anka has posed for years as another man. A woman shows up -- the daughter of the man Anka has pretended to be. Now she's in danger as the espionage ring becomes more desperate.
- A bitter man, whose father was crippled working for mining companies, decides to seek revenge. He appears to be extorting mining executives. In reality, he intends to kill them. Erskine and Colby head up the FBI's investigation. Erskine takes the place of one of the executives and comes face to face with his quarry.
- Glen Parmenter is a brilliant KGB spy operating in the U.S. He has one flaw: he's deaf and relies on lip reading to understand what people are saying. Erskine goes undercover to smash the spy ring Parmenter is operating. Erskine's undercover identity also has a flaw: the make-believe identity has a deep secret that would attract spies to blackmail him. The question is whether Erskine's cover identity will hold up long enough to complete his assignment alive.
- A deranged man is planning on destroying a U.S. test rocket. He has left a series of cryptic radio messages across the U.S.
- "Doc" Lacy, a legendary criminal, has been incarcerated for 27 years. A gang arranges for Lacy to escape from a Louisiana prison farm. The gang wants Lacy to plot a robbery of a million-dollar Army payroll in Washington state. The infirm Lacy, who has a weak heart, also wants to see his estranged son and wife before the robbery. Erskine and Colby lead the FBI's manhunt. Despite his advancing years, Lacy is quite dangerous who's not afraid to kill if he has to do so.
- A Messenger and guard for a Wall Street brokerage firm are ambushed while making a delivery. During the holdup the guard is killed and Paul Thorpe, the messenger with the briefcase, is taken. He is recognized by one of the three holdup men and that,plus the fact that his uncle is a Cosa Nostra crime boss, saves his life. The men get away with $400,000 worth of negotiable securities. The FBI is soon on the case and begin checking out fences who could handle such a big haul. Thorpe has a fiancée and she is also in danger if he talks.
- The dictator of a South American country enters into a contract with the Cosa Nostra to kidnap a dissident who publishes an opposition newspaper out of Chicago. The dissident's publication is a rallying point for the country's opposition. Erskine and Colby initially don't get cooperation from the dissident, a proud, smart man who thinks he has taken enough precautions. But the Cosa Nostra's point man in the operation is prepared to squeeze those closest to the dissident to achieve his aims.
- To pay for an operation for his crippled wife, a man has been trying to extract money from the wives of servicemen by harassing them with phone calls threatening to expose their secrets. During one of these calls one young woman is so distraught she accidentally falls to her death from her apartment balcony. Her husband vows to find the extortionist himself. Erskine and Colby work to find the man first before more violence results.
- Walker Graham Carr escapes from a mental hospital. He has been convicted of the murder of his wife but he is convinced she's still alive. Erskine and Colby lead the FBI's manhunt for Carr. Carr's uncertain mental condition complicates the bureau's search.
- The mentally unstable Walker Oborn has abducted Emily Willis. FBI Assistant Director Arthur Ward tells Erskine that "the director" has taken a special interest in the case and wants it resolved as soon as possible. Erskine and Colby spearhead the FBI's search in the Pacific Northwest to bring the captured Emily home safely.
- Lt. Frank Harris, a tough plainclothes police officer, questions Joseph Spooner, a junkie informant, to try to break a case. After Harris drops Spooner off, he is beaten and killed by two hoods. Harris was the last person to see Spooner alive and the junkie's death sets off protests about police brutality. Erskine and Rhodes are called in to investigate before a volatile situation turns explosive.
- An Eastern Bloc nation seeks to prevent the defection of Gerald Salzman, one of its key officials, to the U.S. Salzman's wife has already flown to the U.S. with forged papers. Sylvia Prince, who acts as a messenger and coordinator of espionage operations, has activated a sleeper agent who supposedly defected to the U.S. six years earlier. The plot of the conspirators is to kidnap Mrs. Salzman to force him to go back to his homeland. The FBI is on the case after a U.S. State Department official, who knows Salzman, is murdered. Erskine and Colby race to rescue Mrs. Salzman to ensure Salzman's defection takes place.
- The bureau investigates the shooting of a ranch foreman in a border town. The main suspect is the sheriff that the agents have to work with. The sheriff was feuding with the powerful ranch owner whom the foreman worked for, as he was investigating him for transporting illegal aliens across the border.
- The FBI is called in after a wedding attending by rich people in the Southwest is robbed of more than $250,000.
- An escaped federal prisoner abducts his son from the boy's foster parents. The boy has acute leukemia and will die within a month's time without proper medical attention. The escaped prisoner is an accomplished check forger but can be dangerous when cornered. Erskine and Colby follow a trail from New York state to New York City to Chicago and finally to Texas.
- In Los Angeles, an FBI stakeout goes awry. The bureau is on the lookout for Judson, a hitman who is part of the southern Florida syndicate. As Erskine leads the FBI's arrest of Judson, the hitman's partner, Macklin, drives up and begins shooting. Judson is hit amid the crossfire. Macklin flees and forces his way into a car driven by a nurse. Judson dies on the operating table. It turns out the syndicate has ordered both Macklin and Judson be killed. Now, the FBI must take Macklin alive to try to obtain information about the syndicate. The nurse, meanwhile, has a reputation for not holding together during a crisis.
- A young woman is killed on U.S. government property. The M.O. is identical to an earlier crime -- except a man was arrested and convicted of that crime. Erskine and Colby investigate whether the wrong man -- the "scapegoat" of the title -- was convicted in the earlier death.
- Frankie Geller escapes from a federal prison in Pennsylvania. Geller had agreed to take the rap for the Pittsburgh arm of the Organization in return for his family being taken care of. But that didn't happen and his wife killed herself. Geller now is seeking revenge and wants to expose Organization secrets. His primary target is Price, the Organization leader who led the double cross. Erskine and Daniels lead the FBI's manhunt for Geller and are racing to find him before the mob does.
- A former Nazi with the nickname "the Butcher" surfaces in New York. One of his former victims tries unsuccessfully to kill him. Erskine and Colby are on the man's trail but soon encounter more, including Dryden, a wealthy man who is financing neo-Nazi groups in the U.S. The Nazi, meanwhile, is able to blend in with those he hates the most, making it especially difficult for the FBI men to catch him.
- Roger Leroy Mason, a research chemist, cracks under pressure from both his job and personal life. He has sabotaged one facility of a chemical company that is interested in bidding on a process his firm has developed. That incident resulted in a massive fire. The FBI races to find Mason before other chemical facilities are destroyed.
- A successful fence wants to leave his criminal life behind but is pressured after a major heist. Tom Colby is sent undercover but his life is in jeopardy when the gang suspect he's a lawman. Lewis Erskine also goes undercover despite the risks and an injury to Colby.
- An unemployed aerospace engineer participates in a bank robbery but is double crossed. Desperate, he plans a new robbery where he will call the shots. He recruits one of his former co-workers for assistance. Meanwhile, Erskine and Colby, who are investigating the first robbery, are now on the engineer's trail.
- The FBI is after the "Jug-Marker," the mastermind behind a series of robberies across the Southeast United States. The Jug-Marker relies on a band of men to perform the robberies, led by the unstable Murzie. The Jug-Marker and Murzie don't trust each other, but they need each other. The Jug-Marker provides the brains and cunning to successfully plan the jobs while Murzie keeps his men in line. As Erskine and Colby follow the gang's trail, the FBI men look to separate the unlikely partners.
- In Detroit, an agent for the U.S. Department of Immigration and Naturalization is gunned down while investigating the Organization's smuggling of illegal immigrants. He survives but because a federal officer has been assaulted, the FBI assumes command of the case. Erskine and Daniels lead the FBI's probe. Meanwhile, the main witness to the shooting has been bought off. But an Organization boss decides the witness should be silenced -- permanently.
- A state investigator is gravely wounded on the docks. The FBI is brought into the case when it's clear the matter is tied to La Cosa Nostra. A vessel has been revamped into being a cruise ship, with illegal gambling. But the mob is after bigger game. La Cosa Nostra has set up a promising politician to be blackmailed, with the intention of gaining control of a state. Erskine goes undercover as a passenger on the cruise ship. But a member of Cosa Nostra's high commission is also aboard -- and he can recognize Erskine.
- A U.S. diplomat is approached by the Chinese government to provide sensitive information. The Chinese specifically are seeking the contents of a document known as the Forsythe Memo. Erskine impersonates the diplomat to infiltrate a spy ring organized by the Chinese government.
- George Barrows successfully embezzles a large sum of money from the bank where he has worked. But that's only seed money for Barrows' next caper, which he has been planning for an extended time. Erskine and Colby have been assigned by the FBI to track down the fugitive. The question is whether they can catch up and prevent the larger robbery that Barrows has planned.
- Two deaths, 3,000 miles apart, put Erskine and Colby on the trail of Cosa Nostra boss John Duquesne. The first fatality occurred a decade earlier and the body was discovered during a routine military exercise near San Jose. The other is the killing a retired hitman on the other side of the U.S. The Cosa Nostra decides that Duquesne needs to get rid of his ex-wife, who could implicate him in the earlier killing. The FBI tries to connect the two murders and prevent a third.
- Karl Reiman, an Eastern Bloc spy posing as a journalist, has been assigned to seduce Julie Kipp, who works for a U.S. security agency. Reiman's estranged wife shows up, threatening to expose him. Col. Frederic Maas, an official at the U.S. embassy of the Eastern Bloc country, orders the murder of Mrs. Reiman to get her out of the way. The killing brings the FBI into the case. Reiman's mission is to obtain intelligence about what the U.S. would do in the event of a war between the Soviet Union and China ahead of a diplomatic conference in Toronto. Erskine decides to shake things up, hoping to cause his Eastern Bloc opponents to act rashly and to provide the FBI a chance to break the case.
- In St. Louis, Erskine and Rhodes arrest a man they think is a notorious check forger. The arrest has been made with the assistance of an old friend of Erskine's. But the FBI investigator has doubts they've really arrested the right man.
- Hitman Stuart Tilden seriously wounds a businessman in Chicago while seeking the whereabouts of his intended target. The FBI launches an intense investigation, seeking to prevent him from succeeding, and even Assistant Director Arthur Ward will make an arrest in the field as part of the effort. The target is Richard Ghormley, who formerly worked for a criminal. While he wasn't involved with illegal activities, the criminal fears that he knows too much. He is desperately trying to get home from a business trip to San Francisco on Christmas Eve and Tilden is waiting for him there. Colby and other agents rescue his children while Erskine confronts Tilden.
- In San Francisco, professional football quarter back Paul Talbot is the target of an extortion scheme. The extortionist breaks into Talbot's home to demonstrate he's capable of harming the athlete's family. The FBI, under the supervision of Erskine and Colby, keeps watch as Talbot drops off the extortion money. But Talbot interrupts the bureau's surveillance, punching out the accomplice of the extortionist. The criminal vows to kill Talbot while he's playing in the championship game.
- Alan Graves stages his own kidnapping, extorting money from his father-in-law so he can run off to Europe with a younger woman. Erskine and Colby head up the FBI's investigation and figure out the deception. Graves, meanwhile, is running into trouble. He is robbed when attempting to buy fake passports. His girlfriend also has attracted the attention of an old flame who intends to make his own score at Graves' expense.
- Hamilton is the leader of three men who have stolen a large amount of bonds from bank messengers. Hamilton, while waiting for a deal to fence the bonds, goes back to his home town. There, he revisits his high school sweetheart, Margaret. Meanwhile, Erskine and Daniels lead the FBI's investigation and are running down the three participants in the robbery. Hamilton's two confederates are apprehended and the FBI men are now tracking down the leader of the operation.
- A man is convicted of murder but is adamant of his innocence. His brother, who is already strapped for money financing the convicted man's legal bills, tries an outrageous bluff. The brother plans to blackmail the star witness of the trial. The idea is to convince authorities the witness was the real killer. The witness, an owner of a shipyard, has his own ideas. He hires a hit man. Erskine and Colby are drawn into the case when the wife of the witness reports an extortion letter to the FBI. The question is whether the agents can solve the case before anyone else winds up dead.
- John Streyer, a scientist who defected to East Germany 15 years earlier after participating in an espionage ring, has decided to return to the U.S. Two representatives of a nation "unfriendly to the United States" attempt to detain Streyer at John F. Kennedy International Airport but he gets away. Assistant Director Arthur Ward, already in New York on FBI business, works in the field with Erskine and Colby on the case. Ward had headed the bureau's espionage desk at the time Streyer escaped capture by defecting to East Germany. Streyer is being squeezed by the FBI, which wants to capture him, and the Eastern Bloc country, which has decided he knows too much and must be silenced.
- Erskine and Rhodes are assigned to track down a bank embezzler. The title stems from the fact that Erskine recognizes traits he shares with the embezzler, such as the fact both men served during the Korean War and both are parents. The FBI sets a trap for the embezzler when he has, through an accident, left his young son behind while fleeing to Mexico.
- Erskine and Colby lead the FBI's investigation into organized crime's infiltration of popular music acts. The case begins when the manager of an up-and-coming singer is beaten brutally in Indianapolis. The singer thinks he can buy his way out of his contract. But it turns out the interest payments are so steep the singer can't buy his way out at any price.
- Istvan Sladek, an agent for a Communist Eastern European nation who is operating in the U.S., has obtained a coded list of opposition leaders in his country. But in getting the list, he fatally shot the editor of a newspaper for Slavic Americans. Erkine and Rhodes lead the FBI's hunt for Sladek. At the same time, Sladek knows agents of his country will liquidate him the moment Sladek gives up the list. Complicating all of this is the fact Sladek, during the preceding six months, fell in love with a woman who immigrated from his country. The woman is torn whether to help Sladek or help the FBI.
- Catering a syndicate wedding: all in a day's work for Erskine, out to get the facts behind an upheaval in the organization.
- The wife of a U.S. military chaplain is murdered. The accused is a solider with a shaky record. The town surrounding the base is on edge, complicating the investigation of Erskine and Rhodes.
- In Maryland, a woman graduate student is stabbed and is in serious condition. Because of the crime occurred on U.S. government-owned property, the FBI launches an investigation. Two other students at the same college were slain previously and all three victims belonged to the same sorority. Erskine and Daniels take charge and are joined by a woman FBI agent who graduated from the same college and belonged to the same sorority. The FBI has three suspects and the woman FBI agent will be endangered before the case is concluded.
- The FBI is called in to investigate a case of sabotage at a tungsten mine in New Mexico. The bureau is concerned because the metal is vital for U.S. defense and aerospace efforts. But the sabotage has nothing to do with the Cold War. Rather, it is the work of Tom Rule, whose son was killed at the mine and whose grandson wants to work there. Rule, believing the mine will soon close down anyway, wants to prevent his grandson from following the same path he did. What he doesn't know, and one reason the FBI is involved, is that a large deposit of tungsten is near the mine. Rhodes, investigating the case, goes down into the mine to question Rule. Meanwhile, Rule has planted a bomb. He, Rhodes and other miners are trapped in a cave-in because the mine elevator wasn't working properly. Erskine can only watch anxiously as rescuers, including Rule's grandson, try to free the entombed miners.
- Two men rob a horse racing track of $250,000. They earlier kidnapped the wife of the head cashier to ensure his cooperation and to provide inside information how to accomplish the robbery. Despite their preparation, the heist goes back and the men are forced to hide their haul at the track. They now want the cashier to get the money for them. But the FBI is already on the case and Erskine and Daniels apprehend the cashier. Erskine takes the place of the cashier in a bid to win the freedom of the kidnap victim.
- Avila, a rancher, is being threatened by an extortionist, who wants $200,000 or else he'll spread the virus for hoof-and-mouth disease throughout Avila's herd. The extortionist is being driven by jealousy, hate and bigotry. Erskine and Rhodes seek the extortionist's identity. Avila doesn't realize the threat is closer than he thinks.
- A three-person team of Eastern Bloc operatives led by Major Damian Sava arrives at a U.S. beach. They are discovered by a U.S. sailor. The sailor is killed so the spies can proceed with their mission. The sailor's death brings the FBI into the investigation, with Erskine and Rhodes leading the probe. The target of the spies is Anton Dieter; the spies intend to kidnap Dieter so he can be exchanged for a Soviet bloc operative captured by the FBI, who is now in the Atlanta federal prison.
- Rhodes must confront his own emotions about an incident in his past as he investigates a spoiled young playboy accused of a murder on a cruise ship.
- Chicago businessman Mark Tabor, who has ties to organized crime, is about to go on trial for fraud. Tabor narrowly escapes a hit attempt and is on the run. He is about to be cornered. He has himself committed to an asylum. Erskine poses as a patient to prove that Tabor is faking.
- Frank Welles, one the FBI's Ten Most Wanted List for five years, shoots a U.S. Border Patrol Guard as he enters California from Mexico. Welles also is the target of a contract by La Cosa Nostra. Erskine and Colby are dispatched to bring Welles to justice. But the case is more complicated than it seems. For the FBI, it's a maze. Even after Welles has been apprehended, Erskine and Colby attempt to discover the details of something Welles was planning to do. Welles intended to avenge the death of the 16-year-old daughter of a friend. An innocent man's life hangs in the balance if the FBI men are unsuccessful in their quest.
- A teenager runs away from home, but unwittingly becomes the center of a kidnapping when his father receives a ransom note. The FBI go on the search for the boy while trying not to tip his kidnapper to their actions.
- A New York-based gambling syndicate has its hooks deep into a mens college basketball team from Jefferson City, Kentucky. One of the team's players is injured when the team doesn't win enough to the syndicate's liking. Erskine and Colby lead the FBI's investigation into a potential point-shaving scandal. Meanwhile, the team now is ready to play for the college championship and the syndicate doesn't want to take any chances. When one player refuses a bribe, the gambling syndicate kidnaps his sister to ensure the final score results in a big payoff.
- An attempt to steal a top secret formula at Millard Industries in Dallas fails when only half the formula can be taken before a security guard enters the company's computer room. The CEO of the company summons the FBI and Erskine goes undercover at the firm. The son-in-law of the founder of Millard has been seduced by a Soviet Bloc agent. The executive is unaware of the Communist affiliation of his mistress. A chemist at the company has been set up as a stalking horse so the executive can continue and steal the rest of the formula.
- Three people - two men and a woman - prey on soldiers. The woman, Joyce Carr, entices a sergeant to marry her while one of the men kill him. The new widow then cashes in on the sergeant's insurance. Erskine and Colby are sent to oversee the case. In the interim, the two men unsuccessfully try to rob a bank. Now, they plan to lure another soldier to his doom for the insurance.
- The Cosa Nostra has devised a scheme to gain leverage on stock brokers, who will then steal shares of companies. In turn, the shares will be laundered by using them as collateral to obtain loans at major banks. Erskine and Colby will lead an investigation that will take them to Chicago, San Francisco and Los Angeles.
- An heir to a plastics fortune is kidnapped. There are pools of blood at the crime scene. Was it from the victim or one of the kidnappers? Either way, the development complicates Erskine's investigation.
- James and Patricia Laner are in serious trouble. He is an unsuccessful architect who is addicted to heroin. She works at a Chicago brokerage house who has resorted to stealing stock so the couple doesn't drown in their financial troubles. A theft goes awry when a member of the operation is arrested in Cleveland. Because stolen property was transported across state lines, the FBI is now involved. Erskine goes undercover in the Chicago brokerage house. Now, James Laner is being cut off from his heroin supply to force his wife to steal again.
- A wounded British mercenary dies trying to get into the U.S. Embassy in Paris. In his possession is a newspaper clipping with a picture of French ballet dancer Danielle Chabrol. She is engaged in a May-Demcember romance with retired (and widowed) U.S. diplomat Eric Reverson. Erskine and Colby take up the investigation in Hawaii, where Reverson lives. It turns out that Reverson's neighbor, Jim Kellogg, is running an espionage operation and Danielle is supposed to gain access to information and programs Reverson was involved with at the U.S. State Department. Complicating matters is Glen Reverson, the diplomat's grown son, who knows Danielle and who also has feelings for her. Kellogg is more than willing to kill the younger Reverson if he feels Glen is threatening the operation.
- Hanna Crandall, a witness in a trial against an intelligence operative of a Communist nation, panics. She hurriedly disguises herself and buys a train ticket from New York to Quebec. She's not aware that assassins in the employ of that country are on the train with her. Hanna also befriends a male passenger, who realizes something is wrong but has trouble reaching out to Hanna. Erskine and Rhodes figure out she's on the train and manage to get aboard. Now the FBI agents must protect her before the killers can complete their mission.
- A young woman is kidnapped in Colorado. Her adoptive parents, however, are not wealthy so there isn't an obvious motive for the FBI in its investigation. As Erskine and Colby's investigation proceeds, it emerges the woman's biological father was involved in the theft of $400,000. The kidnap victim was only eight years old at the time. The trauma involved caused her to shut out memories of the incident. The kidnappers bring her to a national forest in Utah, trying to make her remember where the money is hidden.
- Ben Sillman, an East Coast hitman nicknamed the Animal, pulls off an escape from a federal courthouse, where he is being tried for income tax evasion. He shoots two federal marshals. Erskine and Daniels head up the FBI's manhunt, working with Tom Colby, Erskine's former partner who now agent in charge of the bureau's west coast office. Sillman is on the outs with the East Coast mob and tries to force a West Coast mobster to help him flee the country. Complicating the FBI's search is the fact Sillman has kidnapped a woman for possible leverage.
- Inspector Lewis Erskine has a new partner, Special Agent Chris Daniels. The FBI men lead the bureau's investigation of the robbery of more than $4 million in cash and negotiable securities in Dallas. One lead is an ex-con who tipped Erskine that a big job was being planned. One member of the gang who pulled off the robbery had tried to recruit the ex-con but he refused. After the robbery, there is an attempt on the ex-con's life. Another clue is one of the robbery participants cut his hand and has a rare blood type. Erskine and Daniels criss cross half the country in pursuit of the robbers.
- In Chicago, a shipment of platinum from O'Hare International Airport. The three thieves are to meet in San Francisco with a buyer from Europe. The FBI manages to intercept the buyer ahead of the gathering. Erskine goes undercover, taking the buyer's place. Meanwhile, the thieves have found another fence, this one in Denver, who is willing to pay more. The thieves plan to kill Erskine, take the money he has and consummate a deal with the Denver fence.
- Erkine and Rhodes lead an FBI hunt for Lawrence Underwood, a Communist spy who has stolen secrets from an atomic laboratory in Idaho. Underwood, in the course of the theft, caused an accident involving atomic materials and is now contaminated with radiation. Underwood is in a remote part of Idaho, with Erkine on his trail, unaware of Underwood's condition.
- Jean Scott commits a series of robberies while simultaneously seeking the whereabouts of her son, who is living with her ex-husband. She is a consummate actress, able to trick and con her victims before robbing them. Jean also can manipulate male accomplices. Erskine and Colby gradually track her to Nebraska, where her son is now living. But the son rejects her and Jean's latest accomplice decides to leave her as well. When Erskine finally reaches her, he finds Jean has snapped emotionally.
- Dr. Gregory Holman is in Washington playing in a chess tournament. He is also an intelligence operative for an Eastern European country and may be ready to defect to the United States. He apparently is killed in an explosion in a night club. However, Erskine determines the badly burned body is not Holman. Now, the U.S. and Holman's country are seeking the operative. If the U.S. can convince Holman to defect, valuable information can be decoded before an upcoming peace conference. Erskine must cope with another chess player selling information to both sides and Korvin, the experienced ambassador from Holman's country.
- Erskine and Colby travel from New York to Atlanta, leading an FBI investigation of a gang specializing in theft of expensive art items. The gang's M.O. includes a woman who becomes friendly with a guard, permitting her to find ways for the robberies to occur. However, the gang is also a pawn of others who have their own agenda.
- Jerome Williams, an AWOL U.S. Army private, robs a bank. During his getaway, Williams takes in a young woman hitchhiker. It's only when they approach a roadblock that she realizes Williams is a fugitive. Williams isn't a hardened criminal; he robbed the bank, in part to gain attention. Erskine and Colby lead the FBI manhunt for Williams, who injures two men as the chase continues. On top of everything else, Williams gets the attention of a gang of bikers. Williams has taken jewelry from a businessman worth $20,000.
- While preventing a robbery Erskine apprehends Oren McKay. He is wanted for his participation in an armored car holdup years earlier in which $2,000,000 was stolen. Seven men have now been arrested for their parts in the crime but the eighth man, Emory Hale, is still at large and only he knows the whereabouts of the money. McKay alludes to a shadowy ninth man who may have been an inside man on the job. The agents and the ninth man all begin circling around Anita Hale, Emory's wife in hopes of locating him. The trail takes them to the small border town of Las Rinas, New Mexico.
- Logan kidnaps Hale, the man who put him out of business. Logan is demanding a $250,000 ransom from Hale's grown children. What Logan doesn't know is that Hale has suffered his own business reversals. Hale's bank will only loan $70,000 of the ransom. While Erskine and Colby head up the FBI's investigation, Hale's son -- who has always felt inferior to his father -- must deal with the ransom demand and take charge of the situation.
- A group of young extremists wants to start the 'Revolution'. They blow up a govt. building but an anonymous caller phones in a tip to the police. Their leader believes someone connected to the group made the call. Because govt. property is destroyed the F.B.I. is called in to investigate.
- A Communist Bloc spy turns up dead from a heart attack, putting Erskine and Colby on the trail of an espionage ring. The group's target is four scientists. The spies plan to exert enough pressure on one of them to gain access to a top secret project. Erskine goes undercover as a security official at the institute where the scientists work.
- Plans that are part of a top secret U.S. government project are stolen. An independent operator intends to sell them to an Eastern Bloc nation. But the two sides don't trust one another and each is out to gain any advantage it can. The FBI gets a break when a visiting Eastern bloc scientist - who wants to defect to the U.S. - informs the bureau he has been contacted to help verify the plans. But the scientist is injured in a lab accident before he can see the plans. Erskine takes his place and goes undercover. This time out, things will be even more dangerous for the FBI man. He'll have to fake being blind, like the defecting scientist. The scientist is also an accomplished chess player, something that could blow Erskine's cover.
- A priceless diamond has been stolen from a retired millionaire in Oregon. When evidence emerges the thieves have fled to Northern California, the FBI enters the case. Erskine goes undercover as an associate of the retired millionaire. He is to negotiate for the return of the diamond for a ransom. But when other criminals begin to gather, the situation becomes more complicated, and dangerous, for the FBI man.
- A Native American, Joe Cloud, who served under Erskine during the Korean War, kills a man who was trying to rape his wife. Cloud flees custody and Erskine attempts to bring him in while trying to keep Cloud from harm.
- Jennerson, the captain of a freight ship, loses his vessel when it hits what appears to be an old mine. The event is viewed as a tragic accident, which cost the life of one of Jennerson's crew. But the FBI, led by Erskine and Rhodes, is following up indications the incident was deliberately staged. Indeed, the mine, stolen from elsewhere, was newer than a World War II mine. Jennerson and an accomplice are after $40,000 in insurance money. What Jennerson doesn't know is that his wife is having an affair with the accomplice. At the same time, the sunken ship's cargo included chlorine, which create a deadly gas should its containers rupture -- and a tidal wave is approaching, which will rip the sunken ship apart.
- When an Eastern Bloc operative turns up dead near Portland, Oregon, Erskine and Colby are put on the trail of an espionage ring. The FBI agents will crisscross the country in search of its agents. An antique doll is being used to store film copies of a top secret defense project. The question is whether the bureau can act fast enough before the secret information is shipped abroad.
- Erskine and Colby are on the trail of two confidence men, who've conned victims across several states. For each caper, the pair recruit a beautiful woman, who they then ditch before she can collect her share of the proceeds. But their latest woman partner may be more than they can handle.
- Two families are on opposite sides of a kidnapping case. Walter Gretzler and his nephew Norman have abducted John Graham, youngest son of retired industrialist Marshall Graham. Walter, a long-time criminal, used a police car at Norman's garage to cause John Graham to stop along a rural road. Philip Graham, Marshall's estranged, oldest son, is forced to make decisions for the family when Marshall Graham suffers a stroke while returning to the United States from Europe. Philip doesn't want to pay a $300,000 ransom; he feels his brother will be killed the moment any money is paid. Philip, though is unsure and leans on Erskine. The FBI inspector tells Philip he can't make the decision for him. Meanwhile, Colby and other FBI men are tracking down who stripped John Graham's abandoned sports car, hoping for clues that will help track down the kidnappers. Walter Gretzler, at the same time, is ready to kill John Graham, ransom or no ransom.
- In Oregon, members of a religious colony have incurred jealousy and ire from residents of a town. The young son of the colony's leader has reported he was beaten. Erskine and Rhodes are thrust into the middle of the situation, which is as combustible as the nearby forests which have endured a 97-day drought.
- A salesman for a major jewelry firm suffers a heart attack after his briefcase is stolen along with the $180,000 worth of uncut gems it contains. He is the fourth salesman for the firm to be robbed in recent months. Erskine begins to suspect that an inside man in the firm is telling the robbers who to hit, and he finds that a health club is the common link between the victims and the thieves.
- The FBI gets a break in its investigation of loan sharking by the Organization. In Denver, the son of a key Organization member has been arrested for assaulting a loan shark victim who was slow on his payments. A family friend of the Organization father and son agrees to take the rap, accepting $25,000 as an initial payment with the promise of more to come after he serves his sentence. But the son isn't satisfied and wants to tie up all the loose ends himself. Erskine and Colby try to break the conspiracy before harm comes to anyone else.
- A defecting Soviet diplomat informs the FBI that a major Southern California defense contractor is the source of a security leak. Erskine and Rhodes assume cover identities. Meanwhile, the leader of a Soviet spy ring prepares to sacrifice one of the collaborators to throw the FBI off the scent.
- Della Marot leads a double life. On the surface, she appears to be the respectable owner of a bar and restaurant in New Orleans. But she is really the mastermind because of a series of bank robberies and other thefts. Della, however, is tired of the criminal life and wants to retire and be with her 12-year-old daughter, who is off at boarding school. Erskine and Colby investigate a Baton Rouge bank robbery, which puts them on a trail that eventually leads to Della.
- Erskine and Daniels investigate a St. Louis trucking company. The Organization uses trucks from the company to hijack shipments from other trucking firms. The Organization also takes a cut of the profits of the St. Louis company, which gains more and more business as its competitors are driven out of business. The owner of the St. Louis company begins to crack under the pressure and seeks a meeting with Erskine -- a meeting the Organization will seek to stop.
- An armed robbery in Newark goes bad: one of the gang has been killed and a policeman serious wounded. The participants in the robbery scatter. The leader heads to Seattle, where his brother is an executive at a successful shipping business. The executive agrees to give his brother one last chance, unaware of the Newark robbery. Erskine and Colby are on the trail of the gang members. The question is whether they can complete the chase before the gang's leader masterminds yet another robbery -- this one involving his brother's own business.
- A young woman is killed on U.S. government property outside a small Illinois city. The leading suspect lives at Camp Newstart, began by a successful businessman to give young men a second chance. The victim was widely known and popular in the city. Tempers flare and some men in the town, including the man engaged to the victim, want to take justice into their own hands. The real killer is a vagrant. Erskine and Colby try to keep a lid on the town and prevent a riot until they can locate and bring the killer to justice.
- A spy ring is under investigation in the U.S. Matt Bernhardt is a member of the ring and when he is apprehended his nephew is wounded. Erskine goes undercover as the nephew and his investigation leads him to West Berlin and a plot to get the ring leader's wife out of the east sector.
- At a boarding school in Arizona, the son of a rich businessman in Denver has become friends with two other boys. But the boys, member of the school's cross country team, imprison the businessman's son in an abandoned underground chamber that had been used to store explosives. Erskine and Colby head up the FBI's investigation. The Denver businessman, ignoring the bureau's advice, decides to pay the $25,000 ransom. The FBI begins to put the pieces together. But the underground chamber is about to be buried as part of a construction project. The question is whether the bureau can solve the case in time.
- An FBI agent is killed while attempting to arrest a fugitive, Collins, in St. Louis. Erskine and Colby oversee a bureau manhunt. Collins has teamed up with another criminal, Wilson. It was Wilson who killed the FBI agent. The bloodthirsty Wilson will not let Collins and his girlfriend separate from him. For Collins and his girlfriend, the choices are few.
- Mary Ann Lowe is a teenage girl en route to a summer job as a camp counselor when she is kidnapped by a trio of kidnappers. They hold her in an isolated cabin in the mountains while contacting her parents for ransom money. She is the daughter of a wealthy Washington DC business man who also happens to be a good friend of Arthur Ward. While tracing Mary Ann's schedule suspicion falls on the hair salon and the woman who does her hair.
- Erskine goes undercover to infiltrate an Eastern Bloc spy ring operating in the U.S. The inspector has to take on the assignment despite not knowing every detail about the man whose identity he has assumed. The FBI man also will be forced to improvise after a major shakeup has caused the liquidation of the Eastern Bloc official responsible for the spy ring.
- An Indian tribe in Arizona is divided about a planned smelting project. William Rockhill is a young Indian deeply opposed to the project and sets fire to equipment to be used in a survey. A friend of his, an Indian attorney, tried to stop Rockhill. The two men fight and the lawyer is killed. The lawyer is also the son-in-law of the tribe's chief. The situation is becoming explosive. Erskine and Colby are dispatched to resolve the case before the situation turns more tragic.
- A prisoner at a federal prison in Colorado is killed. Dying, he tells the warden that a break-out is about to be attempted. Because the prison houses some of the worst criminals in U.S. custody, the FBI is called into the case. Erskine goes undercover as a prisoner and is the new cell mate of Fritz Moline, a cunning criminal suspected of organizing the escape. But Moline, after planning the escape for five years, may kill Erskine first.
- In Detroit, ambitious Scott Rogers is about to set up an illegal casino backed by the Cosa Nostra. But Rogers wants more -- he is seeking to be admitted as a Cosa Nostra member. Rogers bribes syndicate member Martin Rawl $50,000 to sponsor him. At the same time, a former business partner of Rogers threatens to go to the authorities. The ex-business partner is shot. Erskine and Colby lead the FBI's investigation into the matter. The bureau intercepts a shipment of gambling equipment. Now, Cosa Nostra family leader Nolan Crist decides to cut Rogers off from further family support. Before the case ends, even Erskine's life will be in danger as first Rogers, then Rawl, become threats to the Cosa Nostra.
- The FBI set up an under cover operation after a race car driver is killed in an accident and the owner of the team is under suspicion of a car stealing racket across 10 states. The FBI think there might be a connection between the death and the stolen cars.
- A surfer is killed on the Southern California coast after stumbling onto a meeting of Soviet spies. The killing plunges the FBI, led by Erskine and Colby, into a complex case involving a top-secret government project. Before the bureau can resolve the case, a web of intrigue, adultery and another murder will be spun.
- Erskine and Colby pursue Dree Victor Foster, the "corruptor" of the title, from Pennsylvania to Arizona. Foster's ultimate goal is to free his younger brother, who's about to be sentenced for murder. Along the way, three runaway teenage boys fall under Foster's sway. Foster, whose crimes include murder, has illegally purchased multiple guns and hand grenades.
- A crusading newspaper columnist narrowly avoids death in a murder attempt at his home. The van used by his would-be killers was stolen and crosses state lines, bringing the FBI into the case. Erskine and Colby lead the bureau's investigation. But there's more to the case that seems apparent. The columnist utilizes a snitch who's playing both sides. What's more, the person behind the contract on the columnist may be one of his friends.
- John Rim, on the run after killing three men in a barroom bombing, returns to his homeland, a swamp area where both the land and the locals are rather inhospitable to strangers. Erskine and Colby decide that just a few FBI agents would have better luck with the locals than a large platoon would. But the locals refuse to believe that John Rim is a murderer, though he has now also killed an old man in the area that found him in his house. Erskine tries to persuade Rim's wife, who is now in love with John's brother Frank.
- Nate Phelps, a former professional football player, has robbed a bank in Bakersfield, California, and killed a man. Phelps' accomplice is caught but Phelps remains at large and heads to Los Angeles, where he grew up. Erskine and Colby, already on the West Coast, take charge of the investigation. Phelps tries to flee out of the country but finds himself at odds not only with the law but with criminals who seek the $50,000 Phelps has taken from the bank.
- Erskine and Colby are on the trail of a loner who has committed robberies across several states. The loner travels to Georgia, where his sister has just died. Other criminals believe they can take advantage of the loner. But a trail of violence ensues instead.
- Four kidnappers by mistake abduct the sister of their intended victim. Erskine and Colby try to make sense of the botched crime. Erskine will risk his own life, taking the place of the kidnapped woman's husband who has been instructed to deliver the ransom. Meanwhile, one of the kidnappers is unstable and intends to take charge of the group.
- Thieves execute a daring jewel robbery in downtown St. Louis and flee across the state line to Illinois. There, a helicopter awaits to take them to safety. This brings the FBI into the case, with Erskine and Colby heading up the investigation. The thieves turn the stole jewels over to a fence. The helicopter pilot isn't satisfied with his share and takes more. The thieves have another job lined up and need a new pilot. They select a man who's down on his luck and growing desperate.
- The economics minister of an iron curtain country has defected. His daughter Maria is touring the U.S. and the FBI must get to her before a communist spy can spirit her back to her country to be held as ransom for her father.
- An employee of the Bureau of Indian Affairs is in a coma after an attack at a hard-luck mine called Superstition Rock. Because a federal employee is involved, the FBI is called into the case immediately. There have been a series of incidents at the mine that have spooked the American Indian employees. They believe the incidents indicate the mine is near an Indian burial ground. While Erskine supervises the bureau's investigation, Colby goes undercover as an ex-con who is now a new mine employee. The investigation turns up a conspiracy intended to force a sale of the mine. Before the FBI was solve the case, Colby's life will be endangered.
- The son of a rich South Florida contractor befriends people who, in reality, plan to kidnap him. Erskine and Colby supervise the FBI's investigation. Things are complicated when, during a ransom drop, a motorcyclist spots the ransom and takes it. The motorcyclist isn't involved in the kidnapping and is apprehended by the bureau. Now, the kidnappers are on guard more than ever.
- In Portland, a city commissioner who was actively involved in the fight against organized crime nearly dies in a murder attempt. The hitman is also injured and flees to California. Crossing a state line brings the FBI into the case and the bureau's investigation is supervised by Erskine and Colby. The hitman ends up in San Francisco, where he and a young pregnant woman fall in love. The FBI foils a second murder attempt on the commissioner. Now, the first hitman is marked for murder for failing to kill the commissioner. and his girlfriend is also endangered.
- A con man poses as a psychic to bilk rich people. One of his victims spots the criminal pocketing jewels and realizes he has been had. But the criminal gets away and crosses state lines, bringing the FBI into the case. As Erskine and Colby begin their investigation, the con man has a new target: one of the richest women in Connecticut, who lost a son a year earlier.
- Former boxer Charles Nyack is paroled after serving two years in prison for assault. He is planning revenge against the woman whose testimony but him behind bars. When his friend who is driving him from prison objects to his plans, Nyack knocks him out and leaves him by the wayside where he later dies. A massive power blackout complicates the FBI's efforts to find Nyack before he kills his intended victim, who is staying with her mother in a remote house.
- An FBI trainee, one of the best who has ever gone through the FBI academy in Quantico, Virginia, discovers a cousin is the man who is trying to blow up a federal building in Washington.
- Exiles from a South American country are trying to organize a coup of their former land. What they don't know is they have a mole among them. Erskine is assigned to infiltrate the exiles, who are based in Miami, by pretending to be a mercenary.
- A Communist sleeper agent in New York has just been activated. The sleeper is known to the FBI and is being watched. But shortly after being activated, the agent has a heart attack. Erskine goes undercover, assuming the man's identity. His target is an operative known as Minerva, who is operating out of Pittsburgh. But the assignment has more than the normal risk. There's a power struggle under way among the spy ring. Minerva has recorded a set of tapes that he believes will be his "insurance policy." For Erskine and the bureau, those tapes are an opportunity to gain valuable intelligence about spies operating in the United States.
- In Boston, a Communist spy ring is after top secret plans of a defense contractor. A scientist employed by the company has stolen part of the plans for $5,000. But he attempts to blackmail the spy ring's leader for another $5,000 to supply the key plans of the project. Luther Shawn, the ring leader, calls his bluff and has his Rottweiler attack, nearly killing the scientist. The spy ring's No. 2 man now attempts to seduce a lonely administrative assistant who has access to the plans. The FBI, led by Erskine and Colby, is assigned to the case after messages from a Communist ship are intercepted. But the bureau's information is only fragmentary. The question is whether Erskine can catch up to the fast-moving spy ring.