- Henry Corden
- Fred Flintstone
- Frank Welker
- Barney Rubble
- Jean Vander Pyl
- Wilma Flintstone / Pebbles Flintstone (voice)
- B.J. Ward
- Betty Rubble
- Lewis Arquette
- Prof, Einstone
- Alan Reed
- Fred Flintstone
- Mel Blanc
- Barney Rubble / Dino / Additional gadgets / Additional voices (voice) (archive footage)
- Bea Benaderet
- Betty Rubble (I)
- John Stephenson
- Mr. Slate
- Don Messick
- Bamm-Bamm Rubble
- Gerry Johnson
- Betty Rubble (II)
- Daws Butler
- Additional gadgets / Additional voices (voice) (archive footage)
- June Foray
- Additional voices
