From Beyond/Fun Facts
From The Grindhouse Cinema Database
- Dr. Bloch is named after Robert Bloch, the author of the novel upon which Psycho was based and a friend of writer H.P. Lovecraft.
- Dr. Pretorious' character is named after Dr. Septimus Pretorius, Henry Frankenstein's former teacher, who seduces Henry to the dark side.
- The address on the house is 666.
- The H.P. Lovecraft story on which the film is based is only seven pages long.
- Studio executives opposed the casting of Barbara Crampton as Dr. McMichaels because they thought she was "too young to be believable as a psychologist". Stuart Gordon, however, insisted that Crampton be cast, and she was.
- An opening scene in which Dr. Pretorius hammers a nail through an unwilling female's tongue was excised.