ALF / ALF aka Wayne Schlegel / Crime Stoppers Host / Rick Fusterman (1 episode, 1986-2004)
Willie Tanner (103 episodes, 1986-2004)
Kate Tanner (103 episodes, 1986-2004)
Lynn Tanner (103 episodes, 1986-2004)
Brian Tanner (103 episodes, 1986-2004)
Trevor Ochmonek (41 episodes, 1986-2004)
Raquel Ochmonek (35 episodes, 1986-2004)
Jake Ochmonek (15 episodes, 1988-1989)
ALF / Gordon 'ALF' Shumway (2 episodes, 1986-2004)
Dorothy Halligan (9 episodes, 1987-1989)
Neal Tanner (5 episodes, 1989-1990)
Larry / Dr. Lawrence 'Larry' Dykstra (4 episodes, 1987-1989)
Mrs. Byrd (3 episodes, 1988)
Robert Sherwood (3 episodes, 1989-1990)
Jody (5 episodes, 1986-1988)
Officer Griswald / Lenny Scott (3 episodes, 1987-1988)
Whizzer (3 episodes, 1987-1989)
Stacy Langenkamp (3 episodes, 1990)
George Foley (2 episodes, 1987)
Police Officer (2 episodes, 1987)
Danny Duckworth (2 episodes, 1988-1989)
Flakey Pete (2 episodes, 1988)
Rich Little (2 episodes, 1988)
Brandon Tartikoff / Nick 'Nicky' ('The Fish') Mintz (2 episodes, 1987)
Tiffany (2 episodes, 1987)
Stephanie / Stephanie Taylor (2 episodes, 1988-1989)
Randy (2 episodes, 1988-1989)
The Matinee Lady (2 episodes, 1988)
Sgt. Matt Fox (2 episodes, 1988)
Carl Buck (2 episodes, 1986-1987)
Mrs. Lyman (2 episodes, 1987)
Richard (2 episodes, 1987)
The Stage Manager (2 episodes, 1988)
Artie (3 episodes, 1986-1987)
Sylvia (2 episodes, 1988-1989)
Denise (2 episodes, 1987)
Dudley (2 episodes, 1988)
Pope John Paul II (2 episodes, 1988)
Sam (3 episodes, 1986-1987)
Dr. Willoughby (2 episodes, 1987)
Fred De Cordova (2 episodes, 1988)
Jeff (2 episodes, 1988)
Bernice Billings (3 episodes, 1987-1988)
Nurse #1 (2 episodes, 1987)
Rick (3 episodes, 1988)
Uncle Rocky (2 episodes, 1988)
Gravel Gus (3 episodes, 1987-1988)
Delivery Man (3 episodes, 1986-1987)
Cat Woman (3 episodes, 1987-1988)
Nurse #2 (2 episodes, 1987)
Diana (2 episodes, 1988)
Kelly (2 episodes, 1987)
Jason (2 episodes, 1988)
Little Boy (2 episodes, 1987)
Brenda (2 episodes, 1987)
Herb (1 episode, 1986-1988)
Doug Gould (1 episode, 1988)
Officer Gaffney (1 episode, 1988)
Larry / President (1 episode, 1986-1989)
Ed McMahon (2 episodes, 1988)
Andrew Seminick, Burglar (1 episode, 1986)
Tow truck driver Bert (1 episode, 1986)
Mary Jo (1 episode, 1986)
Scott (1 episode, 1986)
Joe Namath (1 episode, 1986)
Dog-Pound Attendant (1 episode, 1986)
Stele (1 episode, 1986)
Gilligan (1 episode, 1987)
Warren (1 episode, 1987)
Lizard (1 episode, 1987)
Congressman Nathan Peal (1 episode, 1987)
Bill Loman (1 episode, 1987)
Spencer (1 episode, 1987)
Exterminator (1 episode, 1987)
Miss Bartley (1 episode, 1987)
Consumer Ed (1 episode, 1987)
Brother Ed (1 episode, 1987)
Officer (1 episode, 1987)
Maura Norris (1 episode, 1988)
Betty Susla (1 episode, 1988)
Ethel Buttonwood (1 episode, 1988)
Eddie (1 episode, 1988)
Uncle Albert (1 episode, 1988)
Angel Bob (1 episode, 1988)
Mary (1 episode, 1988)
Mr. Duncan (1 episode, 1988)
FBI #1 (1 episode, 1989)
Joanie (1 episode, 1989)
Elaine Ochmonek (1 episode, 1989)
Jim 'Jimbo' Hutchinson (1 episode, 1989)
Miss Williams (1 episode, 1989)
Marilyn Geiser (1 episode, 1989)
TV Shrink (1 episode, 1989)
Lee Fraiser (1 episode, 1989)
Aaron King (1 episode, 1989)
David Horowitz (1 episode, 1989)
Howard (1 episode, 1989)
Steve Michaels (1 episode, 1990)
Margaret (1 episode, 1990)
Casey Kasem (1 episode, 1990)
Colonel Halsey (1 episode, 1990)
Lloyd Ruben (1 episode, 1990)
Scooter (1 episode, 1990)
Animal (1 episode, 1986)
Mr. Defoe (1 episode, 1986)
Heidi (1 episode, 1986)
Police Officer (1 episode, 1986)
(1 episode, 1986)
Myrna (1 episode, 1986)
Father (1 episode, 1987)
Skipper Jonas Grumby (1 episode, 1987)
Walter Burke (1 episode, 1987)
Ms. Wine (1 episode, 1987)
Interviewer (1 episode, 1987)
Monk (1 episode, 1987)
(1 episode, 1987)
Man (1 episode, 1987)
Senator Gil Hossenfeffer (1 episode, 1987)
Sandy Duncan (1 episode, 1988)
Vince (1 episode, 1988)
Nick Susla (1 episode, 1988)
Delivery Man (1 episode, 1988)
Alexander (1 episode, 1988)
Mavis (1 episode, 1988)
Laura (1 episode, 1989)
Laverne Litwak (1 episode, 1989)
FBI #2 (1 episode, 1989)
Rex Savage (1 episode, 1989)
Rita (1 episode, 1989)
Mrs. Watson (1 episode, 1989)
Farmer (1 episode, 1989)
Phil (1 episode, 1989)
Sabato Springs Man (1 episode, 1989)
Man (1 episode, 1989)
Howie Anderson (1 episode, 1990)
Brian, Sr. (1 episode, 1990)
Minister (1 episode, 1990)
Lieutenant Alden (1 episode, 1990)
Michael (1 episode, 1990)
Hogarth (1 episode, 1986)
Alien Task Force Officer Darnell Valentine (3 episodes, 1986-1987)
Dean Houseman (1 episode, 1986)
Bunny (1 episode, 1986)
Dad (1 episode, 1986)
Pizza Delivery Man (1 episode, 1986)
Professor Roy Hinkley (1 episode, 1987)
Dorothy (1 episode, 1987)
Luis Mancia (1 episode, 1987)
John McLaughlin (1 episode, 1987)
Jack Rabbit Courier (1 episode, 1987)
Michele Brustin (1 episode, 1987)
Lady (1 episode, 1987)
Betty (1 episode, 1988)
Hannah (1 episode, 1988)
Howard (1 episode, 1988)
Jim (1 episode, 1989)
Mr. Rasmussen (1 episode, 1989)
Girl (1 episode, 1989)
Airline Worker (1 episode, 1989)
Doug (1 episode, 1989)
Willie #1 (1 episode, 1989)
Betsy (1 episode, 1989)
Eric, Sr. (1 episode, 1990)
Sergeant Armstrong (1 episode, 1990)
Ellen (1 episode, 1990)
Mr. Polniakoff (1 episode, 1990)
Darnell Valentine (1 episode, 2004)
Addison (1 episode, 1986)
Skydiver (1 episode, 1986)
Dr. Laura Schrock (1 episode, 1986)
Sandy (1 episode, 1986)
Mary Ann Summers (1 episode, 1987)
Ed Billings (1 episode, 1987-1988)
Workman (1 episode, 1987)
Monica (1 episode, 1987)
Customer at garage sale (1 episode, 1987)
Sid (1 episode, 1988)
Julius (1 episode, 1989)
Harry (1 episode, 1989)
Willie #2 (1 episode, 1989)
Marshall (1 episode, 1989)
Ron (1 episode, 1989)
John (1 episode, 1989)
Andrea (1 episode, 1989)
Roxanne (1 episode, 1990)
Officer (1 episode, 1990)
Charlie (1 episode, 1990)
Sid (1 episode, 1990)
Instructor (1 episode, 1986)
Butch (1 episode, 1987)
Denise (1 episode, 1988)
George (1 episode, 1989)
FBI #3 (1 episode, 1989)
The Intruder (1 episode, 1989)
Larry Slotkin (1 episode, 1990)
Nolan (1 episode, 1986)
Felicia Burke (1 episode, 1987)
Alison (1 episode, 1987)
FBI #4 (1 episode, 1989)
Delores (1 episode, 1989)
Man (1 episode, 1990)
Ron (1 episode, 1987)
Brandon Tartikoff (1 episode, 1990)
Skydiver Collins (1 episode, 1986)
Secretary to Brandon Tartikoff (1 episode, 1987)
Rudolph the Plate Spinner (1 episode, 1990)
Dr. Joyce Brothers (1 episode, 1988)
Joan Embery (1 episode, 1988)
Self - Tommy Newsom (1 episode, 1988)
Dog (1 episode, 1988)
Margaret Thatcher (1 episode, 1989)
(1 episode, 1989)
Louise Beaumont (1 episode, 1990)
Rebecca (1 episode, 1990)
Jack (1 episode, 1990)
Bernie (1 episode, 1990)
Ben (1 episode, 1990)
Eric Tanner (uncredited) (16 episodes, 1989-1990)
Cat (uncredited) (3 episodes, 1986-1987)
Rhonda (uncredited) (1 episode, 1986)
Skip (uncredited) (1 episode, 1986)
Elliot Carlin (uncredited) (1 episode, 1987)
Monk (uncredited) (1 episode, 1987)
Julie (uncredited) (1 episode, 1987)
Tim (uncredited) (1 episode, 1988)
Waiter (uncredited) (1 episode, 1988)
British Announcer (uncredited) (1 episode, 1989)
(uncredited) (1 episode, 1989)
Luau guest (uncredited) (1 episode, 1989)
Maxine (uncredited) (1 episode, 1990)
Mother (uncredited) (1 episode, 1990)