Nathan Fillion Hal Jordan / Green Lantern (voice)
Ron Perlman Slade Wilson / Deathstroke (voice)
Michael B. Jordan Victor Stone / Cyborg (voice)
Dana Delany Lois Lane (voice)
Cary Elwes Orin / Arthur Curry / Aquaman (voice)
Danny Huston General Sam Lane (voice)
Michael Beach Black Manta (voice)
C. Thomas Howell Professor Eobard 'Zoom' Thawne / Reverse-Flash (voice)
Grey DeLisle Nora Allen / Young Barry Allen / Martha Wayne / Joker (voice)
Dee Bradley Baker Etrigan the Demon / Top / Canterbury Cricket (voice)
Justin Chambers Barry Allen / The Flash (voice)
Steve Blum Lex Luthor / Captain Thunder (voice)
Jay Oliva Director
Kevin McKidd Thomas Wayne / Flashpoint Batman (voice)
Andrea Romano Doris / Central City Newsreader (voice)
Kevin Michael Richardson President of the United States (voice)
Jennifer Hale Iris West / Billy Batson (voice)
James Patrick Stuart Steve Trevor / George "Digger" Harkness / Captain Boomerang / Orm Marius / Ocean Master (voice)
Bruce Timm Executive Producer
Peter Jessop Dr. Vulko (voice)
Kevin Conroy Bruce Wayne / Batman (voice)
Geoff Johns Original Story, Executive Producer
Hynden Walch Yo-Yo (voice)
Vanessa Marshall Wonder Woman (voice)
Candi Milo Persephone / Pedro Pena (voice)
Danny Jacobs Grifter / Captain Cold (voice)
Sam Daly Clark Kent / Kal-El / Superman (voice)
Alan Burnett Executive Producer
Jim Lee Characters
Sam Register Executive Producer
James Tucker Producer
Bobbie Page Executive Producer
James Krieg Screenplay
Frederik Wiedmann Original Music Composer
Christopher D. Lozinski Editor