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)

Mae Whitman

Power Girl (voice)

"Weird Al" Yankovic

Rubberduck (voice)

Shooter Jennings

Mr. Banjo (singing voice)