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.
Naschy was the only person who ever insisted that Las Noches del Hombre Lobo was filmed.
[citation needed] Supposedly the director, a man named René Govar, was killed in a car accident[1] in Paris the week after the film was sent off to the lab for processing, and that since no one ever paid the negative costs, the lab held onto the film for collateral and then later misplaced it or discarded it.
[1] Lead actors whom Naschy attributed to this film (Peter Beaumont and Monique Brainville) apparently were not actual people who ever existed.
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.