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Josh Keaton

Green Lantern / Hal Jordan (voice)

Kevin Michael Richardson

Kilowog (voice)

Jason Spisak

Razer (voice)

Grey DeLisle

Aya (voice)

Tom Kenny

Byth Rok (voice) / Goblin (voice) / Salaak (voice) / Salaak / The Anti-Monitor (voice) / The Anti-Monitor / Chaselon (voice) / Zilius Zox (voice) / Zilius Zox / Byth Rok (voice) / Zilius Zox / Salaak (voice) / Zilius Zox / The Anti-Monitor (voice)

Brian George

Appa Ali Apsa (voice) / Appa Ali Apsa / LANOS (voice) / Appa Ali Apsa / M'Ten (voice) / Brother Warth (voice) / LANOS / Appa Ali Apsa (voice)

Susanne Blakeslee

Sayd (voice)

Jonathan Adams

Atrocitus (voice)

Jennifer Hale

Biara Rev (voice) / Carol Ferris (voice) / Carol Ferris / Princess Gi'ata (voice) / Carol Ferris / Star Sapphire / Princess Gi'ata (voice) / Carol Ferris / Vinessa Swelton (voice)

Ian Abercrombie

Ganthet (voice)

Sarah Douglas

Scar (voice) / Science Director (voice)

Phil Morris

Saint Walker (voice)

Juliet Landau

Drusa (voice)

Jeff Bennett

Duke Nigel Fortenberry / Tomar-Re (voice) / Tomar-Re (voice)

Diedrich Bader

Guy Gardner (voice)

Kurtwood Smith

Shyir Rev (voice)

Rob Paulsen

Goggan (voice) / Goggan / Bumpy (voice)

Corey Burton

Cleric Loran (voice) / Leph / Yarley (voice)

John DiMaggio

Kothak (voice)

Will Friedle

Prince Ragnar (voice)

Tara Strong

Iolande (voice)

Vanessa Marshall

Galia (voice)

Clancy Brown

Zartok (voice)

Robert Englund

Myglom (voice)

Wayne Knight

Captain Goray (voice)

Robin Atkin Downes

Gil Broome / Steam Lantern (voice)

Ron Perlman

Sinestro (voice)

Dee Bradley Baker

Larfleeze (voice)