Harvey Birdman / Judge Hiram Mightor (voice)
Peter Potamus (voice)
Peanut (voice) (as Thomas Allen)
Birdgirl (voice)
Mentok the Mindtaker (voice)
Azul Falcone / Stan Freezoid / Inch High Private Eye / Magilla Gorilla / Dum Dum (voice)
Vulturo (voice)
Secret Squirrel (voice)
Yakky Doodle / Alex the Bartender (voice) (as Steven Blum)
X the Eliminator (voice)
Gigi (voice)
The Deadly Duplicator (voice)
Phil Ken Sebben (voice)
Myron Reducto (voice)