Shortly after moving into a dark, brooding mansion, a psychologist and his co-workers are terrorized by a horrible evil being.

A gangster's former mistress hooks up with a troupe of circus midgets who, as a sideline, rob banks and casinos.

Astronaut Taylor crash lands on a distant planet ruled by apes who use a primitive race of humans for experimentation and sport. Soon Taylor finds himself among the hunted, his life in the hands of a benevolent chimpanzee scientist.