Re-Cut: A total of four different English-language versions exist:
The Mask of Satan (87 minutes) The complete version of the film featuring the original English language dubbing recorded in Italy and the original Italian score by Roberto Nicolosi. This is usually referred to as the "European Version."
Black Sunday (84 minutes) The U.S. theatrical version distributed by American International Pictures. This cut features a more dramatic dubbing job recorded in the U.S., a new score by Les Baxter, and trims to content to meet censorship standards at the time; notably removing the BrotherSister Incest by changing the character of Javuto from Katja's brother to servent. Further edits to this version were used to create the 16mm U.S. television syndication version.
Revenge of the Vampire: The long-delayed British version is a trimmed version of The Mask of Satan that features the original English language dubbing recorded in Italy and the original Italian score by Roberto Nicolosi.
La Maschera Del Deomonio (85 minutes) Not the original Italian version as you might expect from the title. The main title is video generated (in bright red) and superimposed over the black and white film. The film uses the original English language dubbing recored in Italy. The score is a mixture of both the original Italian (Roberto Nicolosi) and U. S. (Les Baxter) scores.
Real-Life Relative: The milkmaid menaced by the recently-resurrected Javuto was played by actor Arturo Dominici's real sister.
Same Language Dub: Shot in English with the majority-Italian cast speaking their lines phonetically, later to be redubbed by native speakers. This was Bava's preferred method to the standard practice of having individual cast members speak their lines in their respective native languages, as he found this quickly became needlessly confusing.