A Hollyrock film company goes on location in Bedrock to film its new feature Monster From The Tar Pits, and gullible Fred is enlisted as stand-in for star Gary Granite. But Fred's real problems begin when Wilma and Betty audition for roles in the film and end up going ga-ga upon meeting movie stars Rock Pile and Wednesday Tuesday.
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 .