X, the Eliminator/Employee/Guard
Peter MacNicol
Harvey Birdman/Judge Mightor
Gary Cole
Peanut (voice)
Thomas Allen
Phil Ken Sebben (voice) / Myron Reducto (voice)
Stephen Colbert
Mentok the Mindtaker (voice)
John Michael Higgins
Peter Potamus
Chris Edgerly
Freezoid/Blue Falcone/Apache Chief
Maurice LaMarche
Birdgirl (voice)
Paget Brewster
Black Vulcan
Phil LaMarr