Michael Winslow ( Michael Winslow )

Plutem (voice)

Darryl Hickman ( Darryl Hickman )

Kid Comet (voice)

Frank Welker ( Frank Welker )

Cosmo / Blip (voice)

Michael Bell ( Michael Bell )

Space Ace (voice)

Lennie Weinrib ( Lennie Weinrib )

Dipper (voice)

Don Messick ( Don Messick )

Astro / Gloop / Gleep (voice)

Gary Owens ( Gary Owens )

Space Ghost (voice)

B.J. Ward ( B.J. Ward )

Elektra (voice)

Alexandra Stewart ( Alexandra Stewart )

Jan (voice)

Virginia Gregg ( Virginia Gregg )

Tara (voice)

Steve J. Spears ( Steve J. Spears )

Jace (voice)

Sparky Marcus ( Sparky Marcus )

Dorno (voice)

Mike Road ( Mike Road )

Zandor / Tundro / Zok / ... (voice)

Allan Lurie ( Allan Lurie )

Uglor (voice)

Casey Kasem ( Casey Kasem )

Announcer (voice)

David Raynr ( David Raynr )

Moleculad (voice)

Ginny Tyler ( Ginny Tyler )

Keene Curtis ( Keene Curtis )

Narrator (voice)

Stanley Ralph Ross ( Stanley Ralph Ross )

Additional Voices (voice)

Chuck McCann ( Chuck McCann )

Additional Voices (voice)

Richard Erdman ( Richard Erdman )

Additional Voices (voice)