There were three characters that were supposed to be displays in the Waxwork, but left out of the film for legal reasons: Jason Vorhees from Friday the 13th (1980), five children from Village of the Damned (1960), and the Thing.
After the policeman visits the Waxwork with Mark, he realizes that many of the statues of the victims resemble missing people from posters he had seen. These posters are actually just copies of one of the posters from the opening credits of The Lost Boys (1987). All of the missing person posters have a single photo of a missing adult, but the posters all have the same information of two missing children on the poster: William G. Bailey 7-26-62 Sandy blond hair brown eyes Missing since August 6, 1979 (or 1973) Call the Santa Carla Police Department Susan Wilbur 5-30-69 Black Hair Blue Eyes Missing since February 6, 1983.
In the shooting script, Johnathan is staring at an exhibit of Jason Vorhees from the Friday the 13th (1980) movies. When Johnathan tells Lincoln about it looked like the same Jason mask from the movies, Mr. Lincoln asks Johnathan: "They made a movie about the Jason killings?" In the film, there is no Jason Vorhees display and Johnathan instead stares at an exhibit of the Phantom of the Opera.
Christopher Bradley, who played Stephan, said in an interview that the bridge attached to hold the fake fangs in place to the roof of his mouth broke during production. Bradley had to stuff chewing gum inside of the hollow fangs in order to get them to stick to his teeth.
Patrick Tantalo said that the Zombie sequence was filmed in one night in Griffith Park. Because they only had one night to film the sequence, the scene where a severed Zombie hand grabs Zach Galligan (Mark) on the wrist was filmed in reverse.
Several names of the characters were changed from the initial shooting script for "Waxwork". Tony was given a last name, Masters, which was left out of the film. Mr. Lincoln's midget butler Junior was originally called "Hans", and Lincoln's tall servant Hans was called "Lurch" because he was described in the script as a Lurch-type character.
In the shooting script, there was supposed to be scene where Mark and Sarah visit James and Gemma after they had decided not to attend the Waxwork tour. The couple are watching Dawn of the Dead (1978) together in James's basement and Gemma unsuccessfully tries to get her boyfriend's attention since it's just the two of them. James isn't in the mood, as he's too caught up into the film, and Gemma sulks by getting a cigarette. Gemma hears a scraping noise on the window. and she switches the TV off to get James's attention. James originally dismisses Gemma's claim as nothing, until he hears the same noise, louder than before. James goes to the window and finds nothing, but is startled when Mark grabs his throat and leaps up screaming like a zombie. James falls to the floor, Mark and Sarah peer up from the window laughing, and James tells them to get lost. James leaves to go to bed, with Gemma shrugging and following after James. It remains unknown if the sequence was ever filmed or simply scripted.
18 wax horror exhibits are seen, including: - Count Dracula - the Phantom of the Opera - a witch - the Marquis De Sade - a werewolf - a mummy - a voodoo priest - a zombie - an urban legend killer (an axe murderer) - the Invisible Man - Frankenstein's monster - an Invasion of the Body Snatchers (1956) pod - a demonic baby (from It's Alive (1974)) - an alien creature - a "cobra-man" circus freak - Jack the Ripper - Mr. Hyde - and a golem.
The trivia item below may give away important plot points.
In the original shooting script, Sarah's slashes she receives after being whipped by the Marquis de Sade remain on her back when she returns to the Waxwork with her friend Mark. After Mark and Sarah return to the Waxwork, the script describes the scene as "Sarah is back in her normal clothes but we can tell by the rest of her that she has really been through the experience that we saw." However, in the film, the slashes Sarah receives from her whipping disappear when she returns to the Waxwork with Mark.