Dr. Jekyll y el Hombre Lobo (Dr. Jekyll and the Wolfman), also known as Dr. Jekyll and the Werewolf, is a 1971 Spanish horror film, the sixth in a series of 12 films about the werewolf Count Waldemar Daninsky, played by Paul Naschy. Naschy actually plays a triple role in the film, portraying Waldemar Daninsky, the Wolf Man and Mr. Hyde. This was Naschy's 2nd film working with director Leon Klimovsky, following their hugely successful 1970 collaboration La Noche de Walpurgis. This film also featured Euro-Horror star Jack Taylor, Mirta Miller and the beautiful Shirley Corrigan of England. The film failed however to reach the box office success of Walpurgis.

Plot

A young, wealthy Spanish landowner, Waldemar Daninsky, aka "El Hombre Lobo" (The Wolfman), searches for a cure to his lycanthropy. He travels to London to consult with the infamous Dr. Henry Jekyll's grandson. The doctor prescribes a serum that transforms the werewolf into a bestial Hyde-like personality. It is theorized that Mr. Hyde's superhuman ego will sublimate Daninsky's werewolf identity and eradicate it.