- Kirk Thornton
- Â Brandon Heat / ... 25 episodes, 2003-2004
- Lex Lang
- Â Nathan / ... 18 episodes, 2003-2004
- Steve Blum
- Â Ballardbird Lee / ... 17 episodes, 2003-2004
- Michelle Ruff
- Â Maria Asagi / ... 17 episodes, 2003-2004
- Beau Billingslea
- Â Bear Walken 17 episodes, 2003-2004
- William Frederick Knight
- Â 'Dr. T' Doctor Tokioka, Butler Tokioka / ... 15 episodes, 2003-2004
- Tony Oliver
- Â Harry MacDowel - 20's 14 episodes, 2003-2004
- Doug Stone
- Â Alzac Tino / ... 13 episodes, 2003-2004
- Michael McConnohie
- Â Big Daddy / ... 11 episodes, 2003-2004
- Dorothy Elias-Fahn
- Â Maria's Friend, Katherine, Widge's Mother, Maggie, Sherry Walken / ... 11 episodes, 2003-2004
- Michael Sorich
- Â Norton / ... 10 episodes, 2003-2004
- Steve Kramer
- Â Butler Tokioka / ... 9 episodes, 2003-2004
- Dan Woren
- Â Driver, Executive B, Laguna Glock, Suburdinate A, Additional Voices / ... 9 episodes, 2003-2004
- Dave Mallow
- Â Gary / ... 8 episodes, 2003-2004
- Kari Wahlgren
- Â Mika Asagi / ... 8 episodes, 2004
- Tom Wyner
- Â 'Bloody' Harry MacDowel / ... 8 episodes, 2004
- Christiane Monteiro
- Â Mika Asagi 7 episodes, 2004
- Kim Strauss
- Â Abbot / ... 6 episodes, 2003-2004
- Tomokazu Seki
- Â Beyond the Grave / ... 4 episodes, 2003-2004
- Bob Papenbrook
- Â Biscoe / ... 4 episodes, 2003-2004
- Joey Camen
- Â Bob Poundmax, Deed's Henchman #3, Gossiper #5, Descartes' Henchman #3 / ... 3 episodes, 2003-2004
- Jamieson Price
- Â Blood War 3 episodes, 2003
- Motomu Kiyokawa
- Â Dr. Tokioka 2 episodes, 2003-2004
- Kumi Sakuma
- Â Mika Asagi 2 episodes, 2003-2004
- John Snyder
- Â Tollbooth Sentry, Gossiper #1, Descartes' Henchman #2, Additional Voices 2 episodes, 2003
- Sam Riegel
- Â Kyne / ... 2 episodes, 2004
- Dave Wittenberg
- Â Kenny 2 episodes, 2004
- Steve Staley
- Â Jolice 2 episodes, 2004
- Paul St. Peter
- Â Bodyguard / ... 2 episodes, 2004
- Tsutomu Isobe
- Â Harry MacDowel 2 episodes, 2004
- Toshihiko Nakajima
- Â Biscoe 2 episodes, 2004
- Takehito Koyasu
- Â Balladbird Lee 1 episode, 2004
- Christopher Corey Smith
- Â Thief A, Gashaw Member #2, Eddie Garlarde 1 episode, 2004
- Kikuko Inoue
- Â Maria Asagi 1 episode, 2004
- Eiji Hanawa
- Â Gary 1 episode, 2004
- Ryûzaburô Ôtomo
- Â Bear Walken 1 episode, 2004
- Iemasa Kayumi
- Â Big Daddy 1 episode, 2004
- Michiko Neya
- Â Sherry Walken 1 episode, 2004
- Chafûrin
- Â Bob Poundmax 1 episode, 2004
- Shintarô Ôhata
- Â Kenny 1 episode, 2004
- Jeffrey Stackhouse
- Â Suburdinate B 1 episode, 2004
- Liam O'Brien
- Â Sam (Episode 13) unknown episodes
- Michael Forest
- Â Executive Sid Galarde unknown episodes
- Mary Elizabeth McGlynn
- Â Milanda unknown episodes
- Wendee Lee
- Â Residant, Additional Voices unknown episodes
- Julie Ann Taylor
- Â Randy's Wife, Biscoe's Wife, Boy unknown episodes
- Yasuhiro
- Â Bear's Subordinate unknown episodes