Impressed by Fred's physical strength, movie producer Go-Go Ravine hires him to play ""Hercurock"" in a new movie. After braving pterodactyls, charging mastodons, and a three-headed brontosaurus, though, Fred retires back to the safety of his day job at the rock quarry.
Elenco: Mel Blanc , Alan Reed , Jean Vander Pyl , Bea Benaderet , John Stephenson , Daws Butler , Gerry Johnson , Don Messick , Hal Smith , Howard Morris , Doug Young , Henry Corden , Harvey Korman , Allan Melvin , Jerry Mann , Don Messick .