Director Nick Millard wanted to distance his vampire film from the Dracula mythos, so he based the script off of stories he heard of defecting priests and nuns who practiced devil worship.
The crypt set was constructed in Millard's garage, by a friend of his who did stone work. The set can be seen in the Death Nurse films. A cardboard coffin was also purchased for the film.
The original title of the film was going to be called "Brother of a Vampire".