- "The Train Stranger" is the first novel of Patricia Highsmith. The copyright of the novel was sold for only US$7,500. In order to keep the price down, director Alfred Hitchcock deliberately prevented his name from appearing in the negotiation. , Highsmith, who learned the truth later, was greatly annoyed.
- The film turns Bruno in the novel from a rude alcoholic into a very attractive handsome guy.
- Hitchcock wanted to invite a more experienced screenwriter to write for the film, but was rejected by eight screenwriters, including John Steinbeck and Thornton Wilder. They all thought the story of the film was flashy and unrealistic. Doubts about Highsmith, who published a novel for the first time.
- Director Hitchcock starred in the film as a guest who got on the bus with a double bass.
- William Holden was the first candidate to play Guy.
- The film is the last full feature film starred by Robert Walker. Eight months after the film was completed, he died of a drug allergy.
- The film determined the position of Carol Bernard’s star badge on the Hollywood Walk of Fame. In 1951, she served as the lead at the Warner Theater on Hollywood Boulevard. Bernard, who had watched the film, told a pair of latecomers. Men and women should watch this wonderful movie from the beginning, so they were fired. Many years later, Bernard, who had become famous, asked her star to be placed in front of the Warner Theater.
Strangers on a Train behind the scenes gags
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Barbara Morton: I've just been talking to your shadow. Guy, did you know Mr. Hennessy helped crack that axe murder I was reading about? You know, the one where the body was cut up and hidden in the butcher shop? He was locked in the ice box with the left leg for six hours!
Guy Haines: Oh, Babs, he pulls those things out of his hat.
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Bruno Anthony: Now, you're going to do a murder. How are you going to do it? This is the fascinating part. How are you going to do it? I didn't get your name?
Mrs. Cunningham: Mrs. Cunningham.
Bruno Anthony: Mrs. Cunningham, how are you going to do it?
Mrs. Cunningham: Well, I suppose I'll have to get a gun from somewhere.
Bruno Anthony: Oh no, Mrs. Cunningham. Bang, bang, bang all over the place. Blood everywhere?