Mel Blanc

Barney Rubble / Dino / Mr. Spacely (voice)

Daws Butler

Elroy Jetson / W.C. Cogswell / Henry Orbit (voice)

Don Messick

Astro / R.U.D.I / Mac / Announcer / Store Manager / Robot (voice)

Henry Corden

Fred Flintstone / Knight (voice)

Jon Bauman

Iggy (voice)