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)