Trivia

Several scenes in black and white from "The Awful Dr. Orlof" (1962) were used in the third cut of the film as flashbacks of a young Usher, since Usher and Orlof were interpreted by the same actor, Howard Vernon.

Brazilian independent filmmaker (and Jess Franco fan) Felipe M. Guerra was responsible for a fan-cut that tried to reconstruct the original director's version of this movie (now considered lost). Guerra used parts of the other two versions, on VHS and DVD, eliminating all additional scenes of each one and keeping the original audio in Spanish. The result was shown in a special exhibition on Fantaspoa - International Fantastic Film Festival of Porto Alegre (Brazil), on May 19, 2016, with the presence of actor Antonio Mayans. After the projection, in a Q & A, Mayans said that this was the first time he saw the film as it was originally conceived by Jess, and thanked Felipe for having "restored dignity" to the project. The Spanish actor also confirmed that the additional scenes of the French version (the only one commercially released until now) were not directed by Jess, but by Olivier Mathot.

The original version of this film, entitled "The Fall of the House of Usher", was shown only once in a fantastic film festival in Madrid. The bad reception from the public decreed the commercial death of the movie, forcing the director to shoot additional scenes that created two new completely different versions. Only the third version is available on DVD.

The three versions of the film have completely different plots. In the original cut, Usher is a old killer tormented by the ghosts of his victims; in the second version, Usher is a supernatural being who needs human blood to stay alive; finally, in the third version, he was turned into a mad scientist who kidnaps village girls and use their blood to keep his daughter Melissa alive.

The original cut of Jesús Franco was shown only once in Madrid in 1983 and is considered lost since then.