Recurring: Gary Dubois (Classmate), Joe Romersa (Classmate), Jonathan Cook (Narrator), Richard Barnes (Dr. Zaiclit), Tessa Ariel (Shoko Aida)
Episodic: Chris Baker (Detective Todo), Richard Hayworth (Kurageman)
Incidental: David Lucas (Zaiclit's Assistant), Dougary Grant (Inagoman), Gil Starberry (Newscaster), Julie Kliewer (Girl at Pool), Tom Charles (Reporter)
Additional Voices: Bob Marx, Dan Martin, Gloria Gines, Greg Shelton, Hank Wilspank, Heidi Wilbur, Lia Sargent, Patty Horn
Unidentified roles: Commander
Recurring: Gary Dubois (Classmate), Joe Romersa (Classmate), Jonathan Cook (Narrator), Richard Barnes (Dr. Zaiclit), Tessa Ariel (Shoko Aida)
Episodic: Anthony Mozdy (Mimizuman), Bambi Darro (Erika)
Incidental: Dougary Grant (Station Announcement), Sam Strong (Teacher), Sean Barker (Reporter)
Additional Voices: Andrew Ebert, Buck Rhodes, Christopher Joyce, Gloria Gines, Hank Wilspank, Lia Sargent, Paul Stephen
Unidentified roles: Commander
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