They were notable at the time for their daring lesbian storylines.
A planned fourth film in the series, variously announced as either The Vampire Virgins or The Vampire Hunters, only got as far as the early draft stage.
[3] The vampires of the Karnstein Trilogy differ from those of the Hammer Dracula films.
Their weaknesses are garlic and crosses, and the only ways to kill them is by staking them through their hearts or beheading them.
Some of this lore is retained in the 1972 Hammer film Vampire Circus.