In this feature-length film based on the "Flintstones" TV show, secret agent Rock Slag is injured during a chase in Bedrock. Slag's chief decides to replace the injured Slag with Fred Flintstone, who just happens to look like him. The trip takes Fred to Paris and Rome, which is good for Wilma, Barney, and Betty, but can Fred foil the mysterious Green Goose's evil plan for a destructive missile without letting his wife and friends in on his secret?
Alan Reed
as Fred Flintstone (voice)
Mel Blanc
as Barney Rubble / Dino (voice)
Jean Vander Pyl
as Wilma Flintstone (voice)
Gerry Johnson
as Betty Rubble (voice)
Don Messick
as Ali / Various Voices (voice)
Janet Waldo
as Roberta / Various Voices (voice)
Paul Frees
as Rock Slag / Green Goose / Triple X (voice)
Harvey Korman
as Chief Mountmore / Additional Voices (voice)
John Stephenson
as Mr. Slate / Various Voices (voice)
June Foray
as Tanya Malichite (voice)
