Frankenstein's Bloody Terror

A man suffers from the curse of lycanthropy and seeks out the aid of a German doctor and his wife who are experts in the occult. Unknowingly, the cursed man has summoned two vampires instead, who have sinister plans of their own for the werewolf.

Frankenstein's Bloody Terror is a 1971 fantasy horror movie directed by Enrique López Eguiluz, starring Manuel Manzaneque, Paul Naschy, Rosanna Yanni. It holds an IMDb rating of 5.6/10 from 1,060 votes and runs 1h 18m.