Nathan Fillion

as Walter Hoade

as Guy Gardner

as John Nolan(1 ep)

as Guy Gardner(2 eps)

as The Gentleman (voice)(3 eps)

as Guy Gardner

as Self(1 ep)

as Brett Wright

as Headpool (voice)

as Self(1 ep)

as Zan (voice)(2 eps)

as Ace Spade(1 ep)

as Master Karja

as CIA Director Alton West(5 eps)

as John Nolan(3 eps)

as Self(1 ep)

as Duke

as Guy Gardner(1 ep)

as Self

as Bud Nielsen(1 ep)

as T.D.K.

as Johnny (voice)(8 eps)

as Simon Williams / Wonder Man (voice)(2 eps)

as Octopus (voice)(2 eps)

as 42 (voice)(4 eps)

as Self

as Hal Jordan / Green Lantern (voice)

as Self(1 ep)

as Quinn

as Hal Jordan / Green Lantern (voice)

as Green Lantern / Hal Jordan (voice)

as Captain Superior (voice)

as John Nolan(145 eps)

as Nathan Fillion (voice)(9 eps)

as Self

as Shojun (voice)

as Sterling (voice)

as Gary West(6 eps)

as Jacques Snicket (voice)(1 ep)

as Jacques Snicket(9 eps)

as Nathan Fillion(2 eps)

as Self(1 ep)

as Tetter Spice(1 ep)

as Preston (Voice)

as Himself

as Jolene Glaplok(1 ep)

as Green Lantern (voice)

as Jack Moore(25 eps)

as Self

as Cactoid Jim

as Green Lantern / Hal Jordan (voice)

as Chick del Monte / Assassin Banana (voice)(3 eps)

as Monstrous Inmate

as Self(1 ep)

as Green Lantern / Black Adam (voice)

as Narrator

as Johnny (voice)

as Cornvelious Daniel (voice)(1 ep)

as Mark Devereaux(1 ep)

as Hermes

as Green Lantern / Hal Jordan (voice)

as Wernher von Braun(1 ep)

as Johnny (voice)

as Dogberry

as Dr. Mayfair(1 ep)

as Self

as Green Lantern / Mr. Freeze (voice)

as Preston Northwest (voice)(4 eps)

as Green Lantern (voice)

as Self(1 ep)

as Self

as Hal Jordan (voice)

as The Holy Avenger

as Self(2 eps)

as Rainer Shine(7 eps)

as Bob Waite(2 eps)

as Self - Guest(1 ep)

as Richard Castle(173 eps)

as Col. Steve Trevor (voice)

as Chris(1 ep)

as Captain Hammer(3 eps)

as Runner

as Self

as Nathan Fillion(1 ep)

as Nathan Fillion(2 eps)

as Dr. Jim Pomatter

as Alex Tully(6 eps)

as Abe Dale

as Self

as Bill Pardy

as Malcolm 'Mal' Reynolds

as American Businessman Klaus (voice)(1 ep)

as Liver / Joel Larson (voice)(1 ep)

as Luke Riley

as Adam Mayfair(11 eps)

as Kevin Callis(1 ep)

as Brown Widow (voice)(4 eps)

as Vigilante (voice)(2 eps)

as Self(1 ep)

as Robert Graves

as Adam Logan(6 eps)

as Self(1 ep)

as Self - Guest(2 eps)

as Mal Reynolds(11 eps)

as Self(1 ep)

as Father David

as Cliff

as Ronald(18 eps)

as Minnesota Ryan

as Johnny Donnelly(60 eps)

as Troy Larson(13 eps)

as Self - Guest(1 ep)

as Caleb(5 eps)

as Frisbee Guy (voice)(1 ep)

as Michael Ryan(1 ep)

as Master Warrant Officer Tom Jardine

as Self - Guest(2 eps)

as Self - Cameo (uncredited)(1 ep)