- Krystal Joy Brown - Barbara Gordon (voice)
- Minnie Driver - Oswalda Cobblepot / The Penguin (voice)
- Paul Scheer - Aaron Cobblepot / Ronald Cobblepot (voice)
- Michelle Bonilla - Renee Montoya (voice)
- Dan Donohue - Basil Karlo / Clayface (voice)
- Jeff Bennett - Bill / Clarence (voice)
- Jeff Bennett - Jack Ellman / Security Guard (voice)
- Jeff Bennett - Detective / Police Officer / Reporter (voice)
- Lacey Chabert - Yvonne Frances (voice)
- Alex Wyndham - Edmun Haynes (voice)
- Christina Ricci - Selina Kyle / Catwoman (voice)
- Santino Barnard - Young Bruce (voice)
- Jackie Hoffman - Greta / Museum Director (voice)
- Eric Morgan Stuart - Commissioner Gordon (voice)
- Eric Morgan Stuart - Commissioner Gordon / Guard 2 (voice)
- Yuri Lowenthal - Darryl Manning / Stand-In (voice)
- Yuri Lowenthal - Cohen (voice)
- Yuri Lowenthal - Detective Cohen (voice)
- Jamie Chung - Dr. Harleen Quinzel (voice)
- Jamie Chung - Dr. Harleen Quinzel / Harley Quinn (voice)
- Grey DeLisle - Partygoer / Scared Woman (voice)
- Grey DeLisle - Julie / Bearded Lady (voice)
- Grey DeLisle - Newscaster / Radio Operator (voice)
- Tom Kenny - Eel O'Brian / Doorman (voice)
- Tom Kenny - Eel O'Brian / Firebug / Joplin (voice)
- Mckenna Grace - Natalia / Nocturna (voice)
- Gary Anthony Williams - Flass (voice)
- Gary Anthony Williams - Flass / Elf Patient / Orderly (voice)
- Gary Anthony Williams - Flass / Iggy (voice)
- Gary Anthony Williams - Flass / Hendryx / Redding (voice)
- Gary Anthony Williams - Flass / Old Man (voice)
- John DiMaggio - Bullock (voice)
- John DiMaggio - Bullock / Morrison (voice)
- John DiMaggio - Bullock / Valentine (voice)
- John DiMaggio - Bullock / Baby Patient (voice)
- John DiMaggio - Bullock / Manny (voice)
- John DiMaggio - Bullock / Jerry / Wilford Lee (voice)
- John DiMaggio - Bullock / Jerry / Mugger (voice)
- Diedrich Bader - Harvey Dent (voice)
- Diedrich Bader - Harvey Dent / Two-Face (voice)
- Corey Burton - Jack Ryder / Police Radio (voice)
- Jason Watkins - Alfred Pennyworth (voice)
- Jason Watkins - Alfred Pennyworth / Guard 1 (voice)
- Jason Watkins - Alfred Pennyworth / Carnival Barker (voice)
- Kimberly Brooks - Ramona / Secretary (voice)
- Kimberly Brooks - Romy Chandler (voice)
- Kimberly Brooks - Waitress (voice)
- Cedric Yarbrough - Rupert Thorne (voice)
- Cedric Yarbrough - Rupert Thorne / Linton Midnite (voice)
- Cedric Yarbrough - Rupert Thorne / Judge (voice)
- Cedric Yarbrough - Rupert Thorne / Waylon / Judge (voice)
- David Kaye - Hastings / Clown Patient / Orderly 2 (voice)
- David Krumholtz - Fletcher Demming (voice)
- Jim Pirri - Emerson Collins / School Boy Patient (voice)
- Bumper Robinson - Lucius Fox (voice)
- Bumper Robinson - Lucius Fox / Reporter 2 (voice)
- Bumper Robinson - Goon 2 / Mobster 1 (voice)
- Roger Craig Smith - Corrigan / Jones (voice)
- Roger Craig Smith - Corrigan / Hitman / Henchman 2 (voice)
- Toby Stephens - The Gentleman Ghost / Russell Craddock (voice)
- Gaille Heidemann - Wilma (voice)
- Jason Marsden - Gorman (voice)
- Jason Marsden - Gormon / Reporter 1 (voice)
- Reid Scott - Onomatopoeia (voice)
- Peter Jessop - Muller / Henchman 1 (voice)
- William Salyers - Mayor Jessop / Emil Porter (voice)
- William Salyers - Mayor Jessop (voice)
- James Arnold Taylor - Marcus Driver / Client (voice)
- James Arnold Taylor - Client (voice)
- James Arnold Taylor - Marcus Driver (voice)
- Vincent Piazza - Tony Zito (voice)
- Donna Lynne Champlin - Leslie Thompkins (voice)
- Kari Wahlgren - Guard / Secretary / Reporter 3 (voice)
- Kari Wahlgren - Maggie Cain (voice)
- SungWon Cho - Morris / Matt Milligan (voice)
- Juliet Donenfeld - Carrie (voice)
- Amari McCoy - Stephie (voice)
- Haley Joel Osment - Anton (voice)
- Carter Rockwood - Dickie (voice)
- Henry Witcher - Jason (voice)
- Josh Keaton - Matthew (voice)
- Noshir Dalal - Back-up Mobster / Guard (voice)
- Bill Finger
- Bob Kane
- Tamara Gonzalez
- Agnes Kim
- Matt Reeves
- Halley Wegryn Gross
- John Agbaje
- Gabriel Strick
- Kelly Ann Foley
- Gene Vassilaros
- Frederik Wiedmann
- Mark A. Keatts
- Jeff O. Collins
- Wilson Martinez
Hamish Linklater interpreta a Batman / Bruce Wayne (voice) en la serie.
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