Gilligan falls into a strange lake which causes him to grow 50 feet tall. He is kidnapped by P.C. Barnaby, who wants Gilligan to be the main attraction in his circus.
Captain Quantum and Sgt. Tyrano land on the planet expecting to find army volunteers from Aridia, whom they are to train. Instead, they find the castaways and put them through basic training.
Skipper refuses to do "women's work," preferring instead to do the "man's job" of defending the camp from aliens. But when aliens capture the Skipper, it's the women who rescue him.
Gilligan discovers a robot who is programmed to fulfill his master's wishes. Soon the castaways are planning ways to take over the robot to serve each of them.