Seth Green
The Nerd / Batman / Robin / Aquaman / Additional Voices (voice)
Breckin Meyer
Superman / Plastic Man (voice)
Alex Borstein
Wonder Woman (voice)
Nathan Fillion
Green Lantern (voice)
Matthew Senreich
The Flash / Brainiac (voice)
Jonathan Banks
Composite Superman (voice)
Alfred Molina
Lex Luthor (voice)
Giovanni Ribisi
The Joker / Two-Face (voice)
Paul Reubens
The Riddler (voice)
Adam West
60's Batman / Bank Robber (voice)
Burt Ward
Self (voice)
Hugh Davidson
Martian Manhunter / Tran-Zar (voice)
Zeb Wells
Green Arrow / Swamp Thing (voice)
Dee Bradley Baker
Ra's al Ghul (voice)
Kevin Shinick
Narrator (voice)
Mae Whitman
Power Girl (voice)
'Weird Al' Yankovic
Rubberduck (voice)
Shooter Jennings
Mr. Banjo (singing voice)