A team of astronauts is sent to the moon to rescue an alien who is seeking help to save her dying race. They are attacked by a force of bandit robots and discover that enemy spies are out to kill the alien.

Pinkas Braun
Arkin

Stefano Sibaldi
Dr. Frank Haggard

Daniel Martín
Captain Flipper

Joachim Hansen
Dr. Manoli

John Bartha
General Roon