- Actor-Inspired Element: It was Stacy Keach's idea that he'd play Dr. Forrest as an evil albino.
- Cast the Runner-Up: Malcolm McDowell was originally considered for the role of Dr. Bob Forrest, before Mark L. Lester decided to have him play against type.
- Release Date Change: The film was originally slated for a U.S. theatrical release in October of 1989 before being pushed to May of 1990.
- Throw It In!: According to Mark L. Lester, it was John P. Ryan's idea to take the cross from Sonny. It was an improvised on the day the scene was filmed and Lester liked that idea and kept it in the film.
Trivia / Class of 1999