Dr. Gluckman / Martian Guard #1 / President (voice)
Jeff Bennett
Martian Scientist / Court Attendant / Eyes At Gate (voice)
Corey Burton
Peep / Press Girl (voice)
Kathryn Fiore
Commander Bristle / Martian Guard #3 (voice)
Brad Garrett
Major Buzz Blister / Martian General / Worker #3 (voice)
Jess Harnell
Grob / Gardener #1 / Martian Guard #2 (voice)
Tom Kenny
Tom / Press Guy #1 (voice)
Bill Kopp
Computer / Worker #1 / Worker #2 (voice)
Rob Paulsen
Spike (voice)
Frank Welker
Major Biff Buzzard / King Thingg / Gardener #2 (voice)
Billy West
Characters
William Hanna
Director
Writer
Executive Producer
Joseph Barbera
Editor
Ken Solomon
Associate Producer
Diane A. Crea
Producer
Tom Minton
Original Music Composer
Julie Bernstein
Steven Bernstein