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Henry Corden
Fred Flintstone / Monkey #2 / Turtle #2 (voice)

Mel Blanc
Barney Rubble (voice)

Jean Vander Pyl
Wilma Flintstone / Pebbles Flintstone / Elephant (voice)

Gay Autterson
Betty Rubble / Nurse / Turtle #1 (voice)

John Stephenson
Frank Frankenstone / Dinosaur / Monkey #1 (voice)

Don Messick
Doctor / Fish #1 / Fish #2 / Parrot / Pigasaurus (voice)