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.

Secret Organizational Service (S.O.S.) is an international crime syndicate, quite successful with their feminine agents operating under the guise of a fashion model agency led by Lady Bristol and her associate Luigi. The International Service is the governmental secret service decided to put a term to SOS's action. An agent has infiltrated SOS - but she is in danger, after sending a coded message to her supervising Inspector. So, agents Alex Dinamo is to join forces with Adriana, and give the undercover agent a hand.

A wrestler tries to break up a covey of vampires, led by the King of Vampires.

In this Mexican sci-fi fantasy, big beefy Martians invade the earth. Ostensibly, they have come to warn people about the dangers of nuclear testing and exploring space, but their real mission becomes manifest when they begin using their special powers and gadgets to exploit weak earthlings.

Santo and Jorge Rivero team-up to stop an international syndicate from stealing Mexico's greatest treasure.