Public Domain Movies released in 1964

Taken from IMDB: A rich but unscrupulous old woman plots with a scientist to have her brain implanted in the skull of a sexy young woman.

Benevolent aliens from the planet Emerald send superhero Starman to protect Earth from invasion by an evil alien race called the Spherions.

The Martians kidnap Santa because there is nobody on Mars to give their children presents.

After a three-year absence, Hercules returns to find his home conquered by the Babylonian empire and his queen enslaved. He must free her before the three rulers of Babylon find her and use her to their own evil purposes. You can find out more about this movie on it's IMDB page.

This Modified American version is in the public domain. From IMDB: A monstrous evil brain from outer space leads his minions on a crusade to conquer the universe, and unleashes hideous monsters on Earth that spread deadly diseases. Superhero Starman must rescue Earth from the menace of the evil brain while battling armies of monsters the brain sends against him.