Nicholas Helman (2 episodes)

Sanford

Marty 'The Cat' Kirch (1 episode)

Wendell

Del Finney (1 episode)

Sergei Baskov (1 episode)

Icepick (1 episode)

Simon Graham (1 episode)

Everett Poe (1 episode)

Nick Dresden (5 episodes)

(1 episode)

Miles Devereaux (1 episode)

Preston Tucker (1 episode)

Gideon Jeffries (1 episode)

Georges (1 episode)

Brisbane

Claude Clemenceau (1 episode)

Dr. Zirby (1 episode)

Dark Priest (1 episode)

Gower

Eric Darnell (13 episodes)

Yule (1 episode)

Sammy Horn

Himself

Nigel

Billy

Evan Lazlo

Harold Spinner

Nick

Niles Maynard (1 episode)

(1 episode)

Douglas Willard, The Blue Moon Killer (1 episode)

Nick Hewitt (1 episode)

Kohabeez

Ivan Greer

King Josif (1 episode)

Howie Black (1 episode)

Kano / Captain (voice) (1 episode)

Kano (voice) (1 episode)

Prof. Vincent Cardoza (1 episode)

Jackson Weele (voice) (1 episode)

Arthur Field (11 episodes)

Nigel the Director (1 episode)

The Patient (1 episode)

(1 episode)

(1 episode)

Felix Edmundovich Dzerzhinsky (1 episode)

Lenny Stoke (1 episode)

Bryce

Degrillo

Monsieur du Lac

Mr. Allesio (1 episode)

Lew Ramirez

Restauranteur (1 episode)

Damiani

Nostromos / Carl Fowler (voice) (1 episode)

George

(2 episodes)

Jack Allen (24 episodes)

(2 episodes)

(1 episode)

Paul Van Dyke

Alex

Gavin McHugh (1 episode)

Mr. Karst (1 episode)

Eddie (1 episode)

(1 episode)

Jon Winderman

Murdoc (7 episodes)

Sir Guy (1 episode)

Simon

The Wise Man (1 episode)

Donald (1 episode)

Shane Dubois (1 episode)

Power Station Vocalist (1 episode)

Malcolm Graves

(1 episode)

(1 episode)

Keith (1 episode)

Sir Charles 'Dog' Weatherby (1 episode)

Michael Pearson

Boy in alley

Williams

Boy in Orphanage (uncredited)