Ariel Winter Robin / Carrie Kelley (voice)
Bruce Timm Hydrant Fireman (voice), Executive Producer
Conan O'Brien David Endocrine (voice)
Peter Weller Batman / Bruce Wayne (voice)
Michael Emerson Joker (voice)
Michael McKean Bartholomew Wolper (voice)
Frank Welker Mayor Stevenson (voice)
Grey DeLisle Anchor Carla (voice)
Andy Richter Frank (voice, uncredited)
Dee Bradley Baker Don (voice)
Gary Anthony Williams Anchor Bill (voice)
Bob Kane Characters
Maria Canals-Barrera Ellen Yindel (voice)
Lex Lang Rescued Man (voice)
Tress MacNeille Selina Kyle / Bruno / Old Woman (voice)
Robin Atkin Downes Oliver Queen (voice)
Mark Valley Clark Kent / Superman (voice)
Alan Burnett Co-Producer
James Patrick Stuart Murray / Radio Voice (voice)
Yuri Lowenthal Son of Batman (voice)
Frank Miller Graphic Novel
David Selby Commissioner Gordon (voice)
Paget Brewster Lana Lang (voice)
Michael Uslan Executive Producer
Jay Oliva Director
Matthew Girardi Visual Effects
Klaus Janson Graphic Novel
Danny Jacobs Merkel (voice)
Sam Register Executive Producer
Andrea Romano Woman #2 (voice)
Townsend Coleman Morrie (voice)
Benjamin Melniker Executive Producer
Meredith Layne Casting Director
Christopher D. Lozinski Editor
Matthew Humphreys Character Designer
Gwendoline Yeo Lola Chong (voice)
Greg Eagles Ben Derrick (voice)
Bob Goodman Writer
Michael Jackson Alfred Pennyworth (voice)
Christopher Drake Original Music Composer
Jason Charles Miller Axe Fireman (voice)
Robert Hargreaves Sound Designer