Trivia: All the characters in the movie are named after famous prisons around the world - Holloway, Wren, Leavenworth, San Quentin, etc. The characters match the prison types too - Alderson never meets the group, and isolation is the major form of punishment at Alderson Prison in West Virginia. Dr. Holloway is a female doctor, and Holloway Prison is a women's prison in England, Kazan is autistic, and Kazan Prison is Russia is a "disorganized" prison, etc.
Trivia: The last assignment Christopher Walken gives his students before his accident is to read about the headless demon in the story "The Legend of Sleepy Hollow." Years later he played the Headless Horseman in the movie "Sleepy Hollow."
Trivia: In the scene when Cary Grant is going up the steps to the UN, Alfred Hitchcock shot it from a rug truck across the street. He wasn't allowed to shoot the front of the UN. If you look closely, you can see a security guard in the left corner.
Trivia: When Scooby and Shaggy are at a club, Shaggy talks to Mr. Wickles. He says something about Scooby's nose. The man who is sitting next to Scooby is Neil Fanning, the man who does the voice of Scooby-Doo.
Trivia: During the opening credits, there are hidden messages within the names of the people who worked on the production, which are bolded out in red within the person's name. There are five of them, the words 'man', 'cat', 'see', 'red', and 'me'. All these have relevance to the plot.
Trivia: In the dream sequence of the asylum where Amanda Krueger is trapped by the hundred maniacs one of the maniacs looks remarkably like Freddy. Presumably this was his biological father. (Of course this man was played by Robert Englund, the actor who plays Freddy)
Trivia: During the controversial bathtub scene, Cameron Bright was never naked and he and Nicole Kidman were never even in the same room during the filming of the bath scene, apart from one camera shot, and when this shot happened both actors wore special clothes that were not visible to the camera.
Trivia: When the movie shows that Joe is selling his house, there's a real estate sign. Notice carefully it says, "Curtiss Real Estate", this is named after the person at the credits "In Loving Memory of Katherine Ann Curtiss." (01:38:40)
Trivia: This was Edward G. Robinson's last film.
Trivia: The original script by Neal Marshall Stevens had nothing to do with the Hellraiser mythos, but when it was decided that this would be a Hellraiser sequel, Tim Day made the character of Winter a descendant of the toymaker L'Merchant.
Trivia: During the beginning of the film, Al Pacino and Keanu Reeves are on top of the office building. Pacino is promising money, clients, and power to Reeves if he joins his firm. This is a reference to the temptation of Christ where Satan took him to a mountain and showed him all the cities of the world and promised it to him if he bowed down to him.
Trivia: Director Mathieu Kassovitz has two cameo appearances in the film, one as the hooded killer in the doctor's house who shoots at Jean Reno and another as the voice over the CB talking about the Lada car to Vincent Cassel. He was also supposed to have played the role of a policeman in this film but the character was dropped.
Trivia: After Frankie tears up the apartment, possessed by the priest, she goes to the bed and levitates in a cruciform position. During this scene, there is a quick, sweeping shot of the wall and, if you watch it in slow motion, you can see a wall of boxes of Ritz crackers. This is either an obvious endorsement or some kind of inside joke.
Trivia: Director Paul Verhoeven approached Peter Weller for the role of Nick Curran but the producers opted for Michael Douglas instead.
Trivia: In the film poster, the "Not alone" on Halle Berry's forearm is written running from wrist to elbow. However, in the film, when she removes her bandages, it runs elbow to wrist.
Trivia: When Clouseau spins the globe in his office after the first interrogation of Maria, the part calls for him to catch his hand. Peter Sellers ad-libbed a line about Africa being all over his hand. Just before the dissolve to the next scene, the actors start to grin at the ad-lib. (00:35:45)