- Fake Nationality: Richard E. Grant (a British citizen of Dutch/Afrikaner ancestry) plays Scotsman Redferne.
- Hey, It's That Guy!: When you mess with Jerry, you go in the grinder.
- The Other Darrin: Bruce Payne replaced Julian Sands as the title character in Warlock III: The End of Innocence.
- Saved from Development Hell: Warlock was completed in 1988, but didn't find a distributor until 1991.
- Not entirely true. The film did have a distributor (New World Pictures) and it was set to open in May 1989 but the company went under and it took two years to find a domestic release (the film did open in 1989 outside the US).