Christine Cavanaugh
Dexter / D22 / Old Man Dexter (voice)
Eddie Deezen
Mandark / Executive Mandark / Overlord Mandark / Braindark (voice)
Jeff Bennett
Mandark Robot / Dad / Robot #1 / Officer 9412 (voice)
Kath Soucie
Mom / Head Secretary (voice)
Kat Cressida
Dee Dee (voice)
Tom Kenny
Curator / Village Man / Robot #2 / Computer / Man (voice)