Continuity mistake: When Eddie escapes the deep freeze, he wears three rings on his left hand: his middle, ring and pinkie fingers. Bizarrely, the pinkie ring actually disappears in quite a few shots, including when Eddie plays the sax and when he lifts Columbia, just before they mess around on the floor.
Factual error: The criminologist describes the events of the movie as taking place "on a late November evening". In the very next scene, Brad and Janet are driving in Brad's car, and President Richard Nixon's resignation speech is playing on the radio. Nixon resigned in August of 1974.
Trivia: At one point on set, the cast had an off-camera Easter egg hunt. Some were never found, apparently, because you can see at least three of the eggs: one under Frank-N-Furter's throne, one in the main hall in place of the light, and another you can see when they are going up to the lair in the elevator.
Frank-N-Furter: Oh, I just love success.
Riff-raff: He's a credit to your genius, master.
Magenta: A triumph of your will.
Columbia: He's okay.
Frank-N-Furter: Okay? Okay!? Well, I think we can do better then that. [Takes Rocky over to Brad and Janet.] Now, Brad and Janet, what do you think of him?
Janet: Well, I don't like men with too many muscles.
Frank-N-Furter: I didn't make him for you.