The film scenes which are supposed to show Ferdy Mayne's heyday are actually black and white clips of 'Tempi duri per i vampiri' (1959) which feature Christopher Lee in a relatively early role.
Cinematographer Joel King originally wanted to shoot this film in black and white with the only color being red for blood. King was almost fired during the first week of shooting, because he took too long lighting scenes.
The interior of Conrad Radzoff's mausoleum was the only set built for this movie.
While Ferdy Mayne played the villain in the movie, those who worked on the film described him off camera as a dignified, friendly man.