Self - Contestant (1 episode)

Wesley Crusher (voice) (8 episodes)

Azagoron (1 episode)

Wesley Crusher (voice) (1 episode)

Self (3 episodes)

Wesley Crusher (1 episode)

Evan Whitlock (1 episode)

Atlas (voice) (4 episodes)

Self (4 episodes)

Wil Wheaton (1 episode)

Andy

Self (1 episode)

Self - Host (4 episodes)

Co-Worker (voice) (1 episode)

Arcade Heroes Narrator (voice)

David

Doomsday Protestor (1 episode)

Self - Host (104 episodes)

Minos (1 episode)

Flash (voice)

Jonathan Rook (voice) (23 episodes)

Perceptor (10 episodes)

Perceptor (voice)

Self (1 episode)

Himself - Panelist (1 episode)

Drake (1 episode)

Conrad Moody (3 episodes)

Officer Cahoots (1 episode)

Alexander Rook (1 episode)

Thorbir Falbek (2 episodes)

Game Master (6 episodes)

Dr. Doom / Centaur / State Farm Representative (voice) (1 episode)

Passenger

Himself - Host (12 episodes)

Self (2 episodes)

Self - Host (81 episodes)

Creator

Scapegoat #1

Mike Morningstar / Darkstar (voice) (3 episodes)

Isaac Parrish (12 episodes)

Wil Wheaton (17 episodes)

Colin Mason (2 episodes)

Fawkes (16 episodes)

(6 episodes)

Himself (1 episode)

Romulan (voice) (uncredited)

Wil Wheaton (voice) (1 episode)

Silver Age Blue Beetle (voice) (2 episodes)

Kyle / Horace (voice) (1 episode)

Kyle (voice)

Floyd Hansen (1 episode)

Self (8 episodes)

Darkstar (voice) (4 episodes)

Mike Morningstar (voice) (1 episode)

Miles Sklar (1 episode)

Director Alan Smithee

Cosmic Boy (voice) (6 episodes)

Pet Shop Owner (voice) (1 episode)

Walter (1 episode)

Himself (1 episode)

(2 episodes)

Aqualad (voice) (6 episodes)

Aqualad / Computer Geek (voice) (1 episode)

Danny

John Darling

Wesley Crusher

(1 episode)

(73 episodes)

Jimmy

(1 episode)

Dick Smith

Singer (bass) (voice)

Jonas

(1 episode)

Rodney Bedecker

(1 episode)

Tommy

Charlie

Will (23 episodes)

Forest Ranger Gary Barton (1 episode)

Steve (13 episodes)

Robert Todd Lincoln

Bennett Hoenicker

Bryan (1 episode)

Bilchic (6 episodes)

Cadet (1 episode)

Jack

Scottie Cray

Lazarus

Wayne McGarrick (1 episode)

David Reynolds

Arling (1 episode)

Kipp Gibbs

Danny

(1 episode)

Joey Trotta

Kevin (1 episode)

Nick Karpinsky

Nick Karpinsky (1 episode)

Himself - Host (1 episode)

Wil Wheaton (uncredited)

Wesley Crusher (82 episodes)

Zack

Billy Milton

Timothy Higgins (1 episode)

Ehrich Weiss / Young Harry Houdini

Owen Drimmer (1 episode)

Gordie Lachance

Mitchell

Clyde

(1 episode)

Louis' Friend

Tim

Jeff Radcliffe

Martin (voice)

Donald Branch, age 8