Justice League: Defenders of Earth

Justice League

 * Batman (voiced by Kevin Conroy)
 * Wonder Woman (voiced by Susan Eisenberg)
 * Superman (voiced by George Newbern)
 * Hawkgirl (voiced by Maria Canals)
 * Green Lantern/John Stewart (voiced by Phil LaMarr)
 * Flash (voiced by Michael Rosenbaum)
 * Martian Manhunter (voiced by Carl Lumbly)

Villains

 * Clock King (voiced by Steven Weber)
 * Felix Faust (voiced by Robert Englund)
 * Roulette (voiced by Virginia Madsen)
 * Copperhead (voiced by Jose Yenque)
 * Mercy Graves (voiced by Lisa Edelstein)
 * Lord Hades (voiced by John Rhys-Davies)
 * Ra's al Ghul (voiced by Oded Fehr)
 * Catwoman (voiced by Amy Danles)
 * Star Sapphire (voiced by Olivia d'Abo)
 * Morgaine Le Fay (voiced by Olivia d'Abo)
 * Lex Luthor (voiced by Clancy Brown)
 * Poison Ivy (voiced by Park Overall)
 * Harley Quinn (voiced by Tara Strong)
 * General Hardcastle (voiced by Patrick Warburton)
 * Scarecrow (voiced by Chad Einbinder)
 * Kalibak (voiced by Michael Dorn)
 * Penguin (voiced by Dee Bradley Baker)
 * Darkseid (voiced by Mark Hamill)
 * Killer Frost (voiced by Jennifer Hale)
 * Parasite (voiced by Michael T. Weiss)
 * Sinestro (voiced by Michael T. Weiss)
 * Deadshot (voiced by Charles Fleischer)
 * Evil Star (voiced by Thomas Haden Church)
 * Atomic Skull (voiced by Matthew Mercer)
 * Captain Cold (voiced by Matthew Mercer)
 * Vandal Savage (voiced by Phil Morris)
 * Cheetah (voiced by Morena Baccarin)
 * Livewire (voiced by Maria Canals)
 * Galatea (voiced by Nicholle Tom)

Other Allies

 * Fire (voiced by Maria Canals)
 * Kragger (voiced by Hector Elizondo)
 * Hath Set (voiced by Hector Elizondo)
 * Plastic Man (voiced by Ryan Stiles)
 * Amethyst (voiced by Kate Jackson)
 * Black Canary (voiced by Tricia Helfer)
 * Solovar (voiced by David Odgen Stiers)
 * Booster Gold (voiced by Anthony Ruivivar)
 * Green Arrow (voiced by Anthony Ruivivar)
 * Firestorm (voiced by James Arnold Taylor)
 * Bouncing Boy (voiced by Googy Gress)
 * Thanagarian (voiced by David Barrera)
 * Jonah Hex (voiced by Charles Fleischer)
 * Lois Lane (voiced by Jennifer York)
 * Supergirl (voiced by Nicholle Tom)
 * General Kwan (voiced by Clyde Kusatsu)
 * Wind Dragon (voiced by Clyde Kusatsu)
 * Blue Beetle (voiced by Armando Valdes-Kennedy)
 * Captain Atom (voiced by Chad Lowe)
 * Heatwave (voiced by Chad Lowe)
 * Dr. Achilles Milo (voiced by Marc Worden)
 * Zatanna (voiced by Lauren Tom)

Green Lantern Corps

 * Green Lantern/Hal Jordan (voiced by Michael Madsen)
 * Green Lantern/Guy Gardner (voiced by Chad Einbinder)
 * Artois (voiced by Michael Rosenbaum)
 * Aya (voiced by Tricia Helfer)
 * Kilowog (voiced by Jose Yenque)
 * Arisia (voiced by Virginia Madsen)
 * Alisand'r (voiced by Lisa Edelstein)
 * Arkkis Chummuck (voiced by Ryan Stiles)
 * B'dg (voiced by Dee Bradley Baker)
 * Arx (voiced by Anthony Ruivivar)
 * Alia (voiced by Olivia d'Abo)

Justice League Unlimited

 * Warhawk (voiced by Peter Onorati)
 * Kai-Ro (voiced by Lauren Tom)
 * Aquagirl (voiced by Jodi Benson)
 * Big Barda (voiced by Diane Delano)
 * Batman/Terry McGinnis (voiced by Will Friedle)

Other Characters

 * Cron (voiced by David Sobolov)
 * Max Gibson (voiced by Cree Summer)
 * Terapin (voiced by Ethan Embry)
 * Lee (voiced by Ethan Embry)
 * Dr. Willow (voiced by Sandra Horse)
 * Virtual Anchor (voiced by Mark Jonathan Davis)
 * Horoscope Machine (voiced by Mark Jonathan Davis)
 * Gate Guard (voiced by Mark Jonathan Davis)