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)

Ginny Tyler

Keene Curtis

Narrator (voice)

Stanley Ralph Ross

Additional Voices (voice)

Chuck McCann

Additional Voices (voice)

Richard Erdman

Additional Voices (voice)