Pre-publicity advertisements for this picture in trade paper 'Variety' advertised the fact that this movie was being directed by John Huston. Director Stuart Rosenberg then replaced John Huston as director. Some scenes for the movie were apparently actually directed by Huston but reportedly he left the picture after having creative differences with the picture's producers.

Charles Bronson was about fifty-seven years of age when he appeared in this movie.

Charles Bronson and Clint Eastwood were two of the biggest tough guy movie stars during the 1970s. This Bronson movie's chief locale is in Switzerland where Clint Eastwood's The Eiger Sanction (1975) had been also filmed and chiefly set about four years earlier.

The salary of star Charles Bronson was a then exorbitant US $1,500,000. Moreover, this did not include his back-end points percentage profit from the film's box-office grosses and the cost and expenditure for his and wife Jill Ireland's entourage of about a dozen personnel.

For the original UK release, the scene where Charles Bronson builds a makeshift blowpipe from random hotel room accessories, was removed for fear that it might inspire copycat actions. At the same time in British censorship, any movies that showed nunchucks were automatically given "18+" censorship classification rating certificates.

This movie's working title was 'Love and Bullets, Charlie'.

This movie was the first film of a three picture contract that star Charles Bronson had with Lord Lew Grade's ITC Films. Borderline (1980) was the second whilst The Evil That Men Do (1984) was the third and final.

One of this picture's main movie posters featured blonde Jill Ireland striding atop a large revolver, imagery typical of Maurice Binder's opening title sequences from the James Bond movies as well as the covers of some editions of Ian Fleming's James Bond books and other raunchy pulp novels. Not surprisingly, Charles Bronson plays an agent in this movie.

This picture was not the first time that star actors Rod Steiger and Charles Bronson worked on the same film production. Previously, the two had both appeared in the 1950s westerns Jubal (1956) and Run of the Arrow (1957).

Actress Jill Ireland wears a big blonde wig in this picture.

Charles Bronson plays a character in this movie who has the same (or similar) first name to his own which is "Charlie". His character is called Charlie Congers. One of Bronson's nick-names was "Charlie".

This Charles Bronson movie was theatrically released between his pictures Telefon (1977) and Cabo Blanco (1980).

This Charles Bronson movie was mainly set in the snowy Swiss Mountains. It was made and released just a couple of years before Bronson's Death Hunt (1981) whose setting was the snow-capped Yukon Territory Mountains of Canada.

French director Jules Dassin was attached to direct at one stage. In the end, the film was directed by Stuart Rosenberg.

According to the 3rd August 1977 edition of show-business trade paper 'Variety' and the 1st November 1977 edition of show-business trade paper 'Daily Variety', 'John Huston' was the original contracted director on this picture, however, reportedly, due to sickness, Huston was replaced by Stuart Rosenberg.

Debut theatrical feature film of model and actress Lorraine Chase who played the girlfriend of Vittorio Farroni (Henry Silva).

John DeCuir replaced Stephen B. Grimes as production designer. Grimes was a regular associate and collaborator of director John Huston and left the production when Huston did.

The character of Joe Bomposa, played by actor Rod Steiger, was based on an actual real life Chicago gangster who stuttered.

Due to a recent kidnapping of an heiress in the nation of Switzerland, extra security precautions were taken for the picture's production in this country. One of the safety measures implemented was an embargo to all media visiting the set.

The character of Jackie Pruitt, played by actress Jill Ireland, was inspired by singers Dolly Parton and Tammy Wynette.

Star Charles Bronson and his wife Jill Ireland, who both starred in the movie, traveled with their whole family whilst on location in Switzerland, and had a personal entourage of about ten to fourteen personnel.

Due to hijack and terrorism threats from the terrorist organization the Baader-Meinhof Group, a permit request to film at the Geneva Airport (aka the Cointrin Airport) was denied, and as such, the intended shoot-out sequence was relocated to the same city's elegant Hotel Beau Rivage.

The 4th March 1978 edition of show-business trade paper 'The Hollywood Reporter' announced that actor Michael Parrent had signed on for a part in the picture, but his character of a police detective in Phoenix, went uncredited in the movie's onscreen billings.

This was not the first movie ever made with the 'Love and Bullets' title. Two silent comedy shorts made in the nineteen-tens preceded it [See: Love and Bullets (1914) and Love and Bullets (1916)].

'Time Out' said that in this movie, actress Jill Ireland impersonates American country music singer-songwriter Tammy Wynette. Wynette's song "Stand By Your Man" performed by her is heard in the movie.

John Huston was the original director on this movie and it was (for a short time) the first movie where Huston directed Charles Bronson. However, it was not the first time they had worked on the same picture. Huston played Harris Wagner in Bronson's Breakout (1975) about four years earlier.

This movie marks the second time that star actor Charles Bronson has appeared in a movie written by Wendell Mayes. Mayes adapted Brian Garfield's Death Wish (1974) novel and wrote the story and co-wrote the film script for this picture. This movie was made and released about five years after Death Wish (1974) and some DVD tag-lines emphasize that this film is from the writer of Death Wish (1974).

This movie represents the third of ten teamings between producer Pancho Kohner and star actor Charles Bronson. They previously had made St. Ives (1976) and The White Buffalo (1977). There collaboration would be followed by 10 to Midnight (1983), The Evil That Men Do (1984), Murphy's Law (1986), Assassination (1987), Death Wish 4: The Crackdown (1987), Messenger of Death (1988) and Kinjite: Forbidden Subjects (1989).

A similarly titled movie, Love and a Bullet (2002), another Hollywood action film, was made about twenty-three years after this movie was made and released.

Principal photography on this picture started late 1977 but the film did not debut theatrically until 1979.