
Near the end of the 19th century, Prof. John Mayer and his assistant, the scientist Dr. Isabel Reed, accidentally invent a powerful ray. An alien travels to Earth to destroy the machine since it would be a threat to the universe. He initially possesses the mind of Thomas, a sex maniac and serial killer, to get close to Mayer during the demonstration of the machine to scientists and the military. Mayer's niece, Laura, meets an acquaintance of her uncle, the chemist Dr. Paul Rosten, and Mayer invites him to join the research. When Thomas gets close to Mayer, the alien also possesses his mind in order to destroy the device and his notes. Meanwhile, Thomas is not able to control his murderous impulses and attacks several women with a straight razor.
Release Date: 4/1/1971
Runtime: 90 minutes
Languages: English, Spanish
Directors: José Luis González de León, Jack Hill, Juan Ibáñez
00Companies: Azteca Films, Filmica Vergara S.A., Parasol Group, Columbia Pictures
Countries: Mexico, United States of America

Boris Karloff
Prof. John Mayer

Enrique Guzmán
Dr. Paul Rosten

Christa Linder
Laura

Maura Monti
Dr. Isabel Reed

Yerye Beirute
Thomas
Tere Valez
Nancy
Griselda Mejía
Prostitute
Sergio Kleiner
Alien
Mariela Flores
Deaf-mute victim

Tito Novaro
Gen. Nord
Sergio Virel
Villager
Nathanael León
Villager

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