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.
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.
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.
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.
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.
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.
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.
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.
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 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.
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).