Trivia: At the end of the movie Lauren Bacall says to Marlowe "Phil, there's two men out back behind some trees". This is the only time in the movie that she refers to him by his first name. (01:49:45)
Trivia: When Jerry and Rachel are in the Circuit City, there is a poster for Disturbia, a movie that starred Shia LaBeouf and was directed by D.J. Caruso, who directed this film.
Trivia: The scene directly before the first victim, "the movie star", is killed she is talking to herself in the mirror. You can see her reflection and the reflection of the window behind her. If you pay close attention you can see that there is a silhouette in the curtains. Eventually the lightning flashes and you can see the face of the little boy in the silhouette looking into the window at her.
Trivia: This is the first movie in human history to ever to feature a fully CG (computer generated) character when the knight emerges from the stained glass window. Computer graphics had existed prior (Wrath of Kahn), but never once to simulate an on-screen character.
Trivia: When Mary and Norman go into Mother's room, before Mary turns on the light look at the shadow on the wall on the right. It is a silhouette of Alfred Hitchcock, the director of the original "Psycho" (1960). (00:24:10)
Trivia: In the movie, Reggie comments on Mark's Led Zepplin t-shirt, saying they were a great band. Mark accuses her of being one of those adults who pretends to like cool bands to get close to little punks like him. This parallels an incident where Brad Renfro was reading for the role of Mark, and a suit in the production office saw his Megadeath t-shirt and claimed to like that band, too. Renfro said the same thing to the producer that Mark eventually says to Reggie in the film.
Trivia: Even though he shares top billing with Angelina Jolie and Ethan Hawke, Kiefer Sutherland is on screen for less than three minutes.
Trivia: An interesting scene to watch is when Heywood Floyd is talking to his associate on the bench in front of the White House, there is a long shot when you can see a person feeding pigeons. It is none other than Arthur C. Clarke in a cameo appearance. (00:10:59)
Trivia: When Casey enters the shop, the female store clerk is watching the TV. On top of the TV is a piece of memorabilia from The Iron Giant. The director of Tomorrowland, Brad Bird, also directed The Iron Giant.
Trivia: The film's cover of "Another Brick in the Wall" (Parts 1 and 2) were performed by a band called "Class of '99." The band was a super-group made up of members from prominent 80's and 90's rock bands. (Including members of Alice in Chains, Rage Against the Machine, and Jane's Addiction.) The band was formed exclusively to record the covers for the soundtrack, and disbanded immediately after the film's release.
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: Roger Avery, who wrote the original film, originally planned on writing this sequel. However, he was jailed for vehicular manslaughter following a car-accident shortly before he began work on the script. He managed to work out a deal that would allow him to write the film from prison, but his negotiations with the studio eventually fell through, and he was forced to leave the project.
Trivia: John Ostrander, who created the Suicide Squad team in the comics, has a cameo as the doctor who implants the brain bomb into Michael Rooker Savant.
Trivia: This film is notorious for having undertones and themes that many perceive as homoerotic, and the events of the film are often perceived by critics as a personification of the lead character Jesse being tormented by being "in the closet" and unable to be true to himself. While the makers of the film initially denied that this subtext was intentional, screenwriter David Chaskin recently admitted that the subtext was intentionally written into the script in order to give the characters and story depth.
Trivia: Director Alfred Hitchcock has a cameo role in this film - he is seen tossing some litter as Richard and Annabella run from the music hall.