Curse of the Devil (El Retorno de Walpurgis / The Return of Walpurgis, aka Return of the Werewolf) (1973, Spain / Mexico)

Part of the series.
- The Mark of the Wolfman (1968, Spain / Germany)
- Nights of the Werewolf (1968, Spain / France)
- Assignment Terror (1970, Spain / Germany / Italy)
- The Werewolf Vs. Vampire Woman (1971, Spain / Germany)
- Fury of the Wolfman (1972, Spain)
- Dr. Jekyll Vs. the Werewolf (1972, Spain)
- Curse of the Devil (1973, Spain / Mexico)
- Night of the Howling Beast (1975, Spain)
- Return of the Wolfman (1981, Spain)
- The Beast and the Magic Sword (1983, Spain / Japan)
- Howl of the Devil (1987, Spain)
- Lycantropus: The Moonlight Murders (1996, Spain)
- Tomb of the Werewolf (2004, USA)