When Steve Trevor's niece is kidnapped by a gorilla, Wonder Woman captures the Gorilla and turns her over to Professor Zool, who uses his evolution machine to turn her human. But the machine is reversed and sends every one else back to prehistoric times.; Professor Zool's machine advances everyone to the Golden Age of Greece, but Giganta introduces evil and brings the Golden Age to an end.; The Evolution machine brings them to Amazonia before Diana was born.