Trivia: When Lamarr tells Le Petomane that his name is Hedley Lamarr and not Hedy, Le Petomane says that since it's 1874, Hedley could sue her. In 1974, actress Hedy Lamarr filed a lawsuit against Mel Brooks claiming the joke infringed on her privacy. The lawsuit was settled out of court.
Trivia: The Laboratory equipment is the same equipment used in the original Frankenstein.
Trivia: During the big chase scene Marilyn Burns was running so slowly that Gunnar Hansen stopped to cut tree branches so he wouldn't outrun her.
Trivia: Both Paul Newman and Steve McQueen did most of their own stunts in this film.
Trivia: Actress Maud Adams, who played "Andrea Anders", "Scaramanga"s mistress in the film, is the only actress to have played two lead roles in Bond films. A favourite of Cubby Broccoli, In 1983, she returned to play the title character in "Octopussy".
Trivia: The MacGyver episode "Countdown" was a remake of this film. Initially the bomb defusing scene is replicated in part in the Kurt Russell film "Executive Decision"
Trivia: When the film was released Burt Reynolds arranged to have this film shown in maximum security prisons all over the US, because the prisoners obviously couldn't get to the theaters to see it themselves.
Trivia: Sidney Lumet's first choice for Hercule Poirot was Alec Guiness, with Paul Scofield as his second choice. Because they both were busy with other projects, Albert Finney was chosen, even though Lumet felt he was too young for the role.
Trivia: Walter Matthau plays the drunk who sits at the bar wearing a loud shirt and pimp hat. However, for the end credits his name is listed as "Walter Matuschanskayasky"
Trivia: A very young, tall and thin Jeff Goldblum plays one of the thugs that murders Bronson's wife. He is credited as Freak 1.
Trivia: The man who plays that young deputy who bullies Warren Beatty in a bar (they also get into a rough car-chase later in the film) is Earl Hindman, whose most famous role came with the popular (here in Finland also) 1990's series "Home Improvement". He was that "faceless" neighbour of Tim "The Tool Man" Taylor's.
Trivia: The final train crash scene was used in the opening credits of the 1980's TV show "The Fall Guy" starring Lee Majors.
Trivia: The producers were originally considering Walter Brennan to play Grandpa Steinmetz as the lead character. But since he was unable to work due to ill health, they cast Helen Hayes as Grandma Steinmetz instead.
Trivia: Despite playing mother and son, Cosette Lee was only fourteen years older than Roberts Blossom.
Trivia: In the opening scene, Alice - a young girl - lives on a farm with her parents/grandparents, and her mother/grandmother, standing at the back door, calls Alice in for dinner, and the voice has to belong to Ellen Burstyn. When Alice grows up, she is played by Ellen Burstyn.