Michael Winslow
Plutem (voice)
Darryl Hickman
Kid Comet (voice)
Frank Welker
Cosmo / Blip (voice)
Michael Bell
Space Ace (voice)
Lennie Weinrib
Dipper (voice)
Don Messick
Astro / Gloop / Gleep (voice)
Gary Owens
Space Ghost (voice)
B.J. Ward
Elektra (voice)
Alexandra Stewart
Jan (voice)
Virginia Gregg
Tara (voice)
Steve J. Spears
Jace (voice)
Sparky Marcus
Dorno (voice)
Mike Road
Zandor / Tundro / Zok / ... (voice)
Allan Lurie
Uglor (voice)
Casey Kasem
Announcer (voice)
David Raynr
Moleculad (voice)
Keene Curtis
Narrator (voice)
Stanley Ralph Ross
Additional Voices (voice)
Chuck McCann
Additional Voices (voice)
Richard Erdman
Additional Voices (voice)