Directed by	Nicholas Webster
Produced by	Paul L. Jacobson Joseph E. Levine Arnold Leeds
Written by	Paul L. Jacobson Glenville Mareth
Starring	John Call Leonard Hicks Vincent Beck Bill McCutcheon Victor Stiles Donna Conforti Chris Month Pia Zadora Leila Martin
Music by	Milton DeLugg
Cinematography	David L. Quaid
Editing by	William Henry
Distributed by	Embassy Pictures Corporation
Release date(s)	14 November 1964
Running time	81 min.

Santa Claus Conquers the Martians (also titled Santa Claus Defeats the Aliens) is a 1964 science fiction film that regularly appears on lists of the worst films ever made. It is regularly featured in the "bottom 100" list on the Internet Movie Database. It was directed by Nicholas Webster, and it stars John Call as Santa Claus. It also includes an 8-year-old Pia Zadora playing the role of one of the Martian children.

The story involves the denizens of the planet Mars, including Momar ("Mom Martian") and Kimar ("King Martian") who are worried that their children Girmar ("Girl Martian") and Bomar ("Boy Martian") are watching too much Earth television, most notably station KID's interview with Santa Claus in his workshop at the North Pole. Consulting the ancient 800-year old Martian sage Chochem, they are advised that the children of Mars are growing distracted due to the society's overly rigid structure; from infancy, all their education is fed into their brains through machines, and they are not allowed individuality or freedom of thought. Chochem sadly notes that he had seen this coming "for centuries", and states that the only way to help the children is to allow them to have freedom, to be allowed to have fun. To do this, they need a Santa Claus figure, like on Earth. Leaving the sage's dwelling, the Martian leaders decide to kidnap Santa Claus from Earth and bring him to Mars to make toys for the children of their planet. One warmongering Martian, Voldar, is in constant disagreement with this idea and repeatedly tries to kill Santa Claus, as well as two kidnapped Earth children, as he believes that Santa is corrupting the children of Mars and turning them away from the race's original glory. Throughout the movie, Santa Claus makes several jokes to the kidnapped children, laughing to himself and met with silence. He then slowly laughs in disappointment each time.

When they arrive on Mars, Santa and the children build a factory to make toys for the Martian children. However, Voldar and his assistants, Stobo and Shim, sabotage the factory and change the programming so that it makes the toys incorrectly. Meanwhile, Dropo, a Martian who has been acting silly ever since Santa came to Mars, puts on one of Santa's spare suits and starts talking and acting like Santa Claus. He goes to the toy factory to make toys, but Voldar mistakes him for Santa Claus and kidnaps him. When Santa and the children come back to the factory to make more toys, they discover that the machine has been tampered with. Voldar and Stobo come back to the factory to make a deal with Kimar, but when they see the real Santa Claus in the factory they realize that their plan has been foiled. Dropo, held hostage in a cave, tricks Shim, who was guarding him, and escapes. Kimar then arrests Voldar, Stobo and Shim. Santa notices that Dropo is acting like him, and says that Dropo would make a good Martian Santa Claus. Kimar agrees to make Dropo a Santa Claus on Mars and sends Santa and the children back to earth.

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