Las Noches del Hombre Lobo (English: Nights of the Wolf Man) is a lost 1968 Spanish horror film that centers around the werewolf Count Waldemar Daninsky, played by Paul Naschy. It has been credited as the second part of Paul Naschy's 12 "Hombre Lobo" films. However, it's been heavily disputed if the film was ever made or exists at all. No one, including Naschy himself, has ever viewed the film and it has never seen a theatrical or home media release.

Plot

Seeing how this is a lost film, little is known about its plot. All that is known of it, as mentioned in an interview by Naschy himself, is that the story deals with a professor who learns that a student of his suffers from lycanthropy, and under the guise of helping him, uses him as an instrument of revenge by controlling him by means of sound waves whenever he transforms. It is possible this film later became the 1970 La Furia del Hombre Lobo (The Fury of the Wolfman), as the plots of the two films are very similar, and that would explain why Nights no longer exists. Someone on a fan site claimed they saw a still photo from this film, but it could have actually been a still from Fury of the Wolf Man with a variant title printed on it by the distributor, especially since Fury was only released to theaters five years after it was completed.