- Actor Allusion: Director Allusion - the Cary Grant and Ingrid Bergman film Janet and Mrs. Atwater can't remember is Notorious - which is directed by Alfred Hitchcock.
- Actor-Shared Background: Mrs. Atwater describes Philip as a Cancer star sign - which Farley Granger was in real life too. Mrs. Atwater was also right about the celebrity signs she mentioned.
- Banned in China: Actually banned in certain American cities, due to the implied homosexual nature of Brandon and Philip's relationship.
- Creator Backlash:
- Doing It for the Art: People in the cast and crew were determined not to make any mistakes due to the long takes. As such a camera man got his foot broken by a dolly - and he was merely gagged and taken off set. Likewise one of the actresses was meant to put a glass down but missed the table - and a stage hand had to rush in and catch it before it smashed. Both takes are in the final cut.
- Enforced Method Acting: The actress playing Mrs. Wilson was apparently treated like a maid by the rest of the cast during filming.
- Missing Trailer Scene: The trailer has a conversation between Janet and David in Central Park that acts as a Cold Open to the film proper.
- Playing Against Type: James Stewart - America's favorite wholesome leading man - as Rupert Cadell - a former Sadist Teacher.
- Queer Character, Queer Actor: It's subtext but...
- Farley Granger was bisexual, playing the most-likely gay Philip.
- John Dall was gay, playing the Ambiguously Bi Brandon.
- Real Life Writes the Plot: There are four cuts that aren't hidden - because the projectionist screening the film would need to change the reels.
- Trailers Always Spoil: The trailer shows the final scene of Rupert finding out about David's murder, thus eliminating a lot of the suspense.
- What Could Have Been:
- Cary Grant was the original choice to play Rupert Cadell but he turned it down, and the part went to James Stewart instead. Grant would later take a role originally meant for Stewart in North by Northwest.
- Montgomery Clift was the original choice to play Brandon.
- According to the screenwriter, Hitchcock's original intent was to not open with the murder - and to have the audience in doubt for most of the movie as to whether a murder had actually taken place or not. Needless to say the movie opens with the murder, and the tension is instead changed to whether or not they'll get away with it.
- Word of God: Screenwriter Arthur Laurents confirms that in the original play, Rupert had an affair with one of the two murderers back at school.
Trivia / Rope