Diedrich Bader
Batman (voice) (26 eps)
Jeff Bennett
Joker / Captain Marvel (voice) (10 eps)
John DiMaggio
Gorilla Grodd (voice) (9 eps)
Dee Bradley Baker
Professor Zee (voice) (9 eps)
Kevin Michael Richardson
President (voice) (6 eps)
Corey Burton
Doc Magnus (voice) (6 eps)
Tara Strong
Huntress (voice) (6 eps)
James Arnold Taylor
Guy Gardner (voice) (5 eps)
Tom Everett Scott
Booster Gold (voice) (5 eps)
Stephen Root
Woozy Winks (voice) (4 eps)
Lex Lang
Gold / Hydrogen (voice) (4 eps)
Bill Fagerbakke
Helium / Lead (voice) (4 eps)
Billy West
Skeets (voice) (4 eps)
Grey DeLisle
Black Canary (voice) (4 eps)
Will Friedle
Blue Beetle (voice) (4 eps)
Tom Kenny
Plastic Man (voice) (3 eps)
Jason Marsden
Paco (voice) (3 eps)
Jeremy Shada
Young Robin (voice) (3 eps)
Tyler James Williams
Firestorm (voice) (3 eps)
Clancy Brown
Per Degaton (voice) (2 eps)
Jennifer Hale
Zatanna / Poison Ivy (voice) (2 eps)
Zachary Gordon
Young Aqualad (voice) (2 eps)
Hynden Walch
Carbon Dioxide / Platinum (voice) (2 eps)
Kevin Conroy
Batman of Zur-En-Arrh (voice) (2 eps)
Mark Hamill
The Spectre (voice) (2 eps)
Crawford Wilson
Robin / Nightwing (voice) (2 eps)
Cree Summer
Vixen (voice) (2 eps)
Adam West
Thomas Wayne (voice) (2 eps)
Robin Atkin Downes
Weather Wizard (voice) (2 eps)
Greg Ellis
Dr. Canus / Mr. Mind (voice) (2 eps)
Fred Tatasciore
Arsenal / Mutant Master (voice) (2 eps)
Jim Piddock
Dr. Sivana / Shazam (voice) (2 eps)
John Michael Higgins
Riddler (voice) (2 eps)
Mae Whitman
Batgirl (voice) (2 eps)
Vanessa Marshall
Katrina Moldoff (voice) (2 eps)
Nicholas Guest
Question (voice) (2 eps)
Michael-Leon Wooley
Darkseid (voice) (2 eps)
Nika Futterman
Selina (voice) (2 eps)
Paul Reubens
Bat-Mite (voice) (2 eps)
John Wesley Shipp
Professor Zoom (voice) (1 eps)
Gary Anthony Williams
Mongul (voice) (1 eps)
Jeffrey Combs
Kite Man (voice) (1 eps)
Ioan Gruffudd
Armor (voice) (1 eps)
Armin Shimerman
Professor (voice) (1 eps)
J.K. Simmons
Guardian (voice) (1 eps)
William Katt
Hawkman (voice) (1 eps)
Tress MacNeille
Maid (voice) (1 eps)
Andrea Bowen
Talia (voice) (1 eps)
Ryan Ochoa
Young Speedy (voice) (1 eps)
Zack Shada
Aqualad (voice) (1 eps)
Brian Bloom
Iron / Oxygen (voice) (1 eps)
Ron Perlman
Double X / Dr. Ecks (voice) (1 eps)
Dana Delany
Vilsi Vaylar (voice) (1 eps)
Marc Worden
Kanjar Ro (voice) (1 eps)
Laraine Newman
Ms. Minerva (voice) (1 eps)
Richard Moll
Lew Moxon / Two-Face (voice) (1 eps)
Julie Newmar
Martha Wayne (voice) (1 eps)
Peter Onorati
Joe Chill (voice) (1 eps)
Steve Blum
Captain Cold / Heat Wave (voice) (1 eps)
Scott Menville
Metamorpho (voice) (1 eps)
Andy Milder
Jay/Flash (voice) (1 eps)
Hunter Parrish
Wally West (voice) (1 eps)
Bumper Robinson
Black Lightning (voice) (1 eps)
Alan Tudyk
Barry (voice) (1 eps)
Olivia d'Abo
Elasti-Girl (voice) (1 eps)
Dave Hill
Negative Man (voice) (1 eps)
Richard McGonagle
Chief (voice) (1 eps)
Henry Rollins
Robotman (voice) (1 eps)
Lauri Johnson
Ma Murder (voice) (1 eps)
Wil Wheaton
Silver Age Blue Beetle (voice) (1 eps)
Meghan Strange
Harley Quinn (voice) (1 eps)
James Sie
The Atom (voice) (1 eps)
Hope Levy
Stargirl (voice) (1 eps)
Jason Charles Miller
Dollman (voice) (1 eps)
Peter Renaday
Uncle Sam (voice) (1 eps)
Wade Williams
Supreme Chairman (voice) (1 eps)
Sebastian Bader
Robin 3 (voice) (1 eps)
Patrick Cavanaugh
Damian (voice) (1 eps)
James Remar
Two-Face (voice) (1 eps)
Mindy Cohn
Velma (voice) (1 eps)
Matthew Lillard
Shaggy (voice) (1 eps)
Frank Welker
Batboy / Fred / Scooby-Doo / Scooby-Doo Batman (voice) (1 eps)
'Weird Al' Yankovic
'Weird Al' Yankovic (voice) (1 eps)
John De Vito
Freddy/Captain Marvel Jr. (voice) (1 eps)
Sirena Irwin
Mera (voice) (1 eps)
Preston Strother
Arthur Jr. (voice) (1 eps)
James Garrett
Alfred (voice) (1 eps)
R. Lee Ermey
Wildcat (voice) (1 eps)
Peter Woodward
Ra's Al Ghul (voice) (1 eps)