- The Shelf of Movie Languishment: This was filmed in 1972 but was not released until 1974.
- Stillborn Franchise: If the film hadn't been a financial disappointment, there were plans to do sequels with Kronos traveling the world (and even through time) to fight evil. Director Brian Clemens, in his DVD commentary, said that if that had worked out, he probably would've had to change the character's name to "Captain Buffy".
- What Could Have Been: Ingrid Pitt turned down the role of Lady Durward.
Trivia / Captain Kronos-Vampire Hunter