
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.
April 1, 1971
Azteca Films, Filmica Vergara S.A.
16 people

Boris Karloff
Prof. John Mayer
Acting

Enrique Guzmán
Dr. Paul Rosten
Acting

Christa Linder
Laura
Acting

Maura Monti
Dr. Isabel Reed
Acting

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

Tito Novaro
Gen. Nord
Acting
Sergio Virel
Villager
Acting

Nathanael León
Villager
Acting

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