- Alli Mauzey
- Â Catalina Leone 'Lioness' 52 episodes, 2005-2007
- Aldis Hodge
- Â King 52 episodes, 2005-2007
- James Arnold Taylor
- Â Axel Manning / ... 52 episodes, 2005-2007
- Charlie Schlatter
- Â Hawk 52 episodes, 2005-2007
- Brian Donovan
- Â Ollie 'Shark' Sharkster 52 episodes, 2005-2007
- Clancy Brown
- Â Alexander Paine 25 episodes, 2005-2007
- Tom Kenny
- Â Spydah / ... 25 episodes, 2005-2007
- Bill Fagerbakke
- Â Albert 'Flesh' 25 episodes, 2005-2007
- Alexander Polinsky
- Â Garrett 19 episodes, 2005-2007
- Kari Wahlgren
- Â Magness 14 episodes, 2005-2007
- Erin Fitzgerald
- Â Dr. Rachelle Logan / ... 13 episodes, 2005-2007
- Charles Howerton
- Â Kip Hawkes - Jr. & Sr. 12 episodes, 2005-2007
- Pete Sepenuk
- Â Bonez / ... 12 episodes, 2005-2007
- Jefferson Black
- Â Butler / ... 12 episodes, 2005-2007
- Isabella Way
- Â Laura 12 episodes, 2005-2007
- Maurice LaMarche
- Â Eel / ... 2 episodes, 2005-2006
- Jess Harnell
- Â Colonel Richter / ... 2 episodes, 2005-2006
- Danny Mann
- Â Boon / ... 2 episodes, 2005-2006
- Clyde Kusatsu
- Â Master Kwan 2 episodes, 2007
- Tom Wilson
- Â Bogey 1 episode, 2005
- Yuri Lowenthal
- Â Silas Greene 1 episode, 2005
- Keith Szarabajka
- Â Dragon 1 episode, 2005
- Brian Cummings
- Â Vinnie 'Mass' Rossi 1 episode, 2005
- Pat Musick
- Â Momma Rossi 1 episode, 2005
- Jeff Bennett
- Â Icarus 1 episode, 2006
- James Sie
- Â Terrance Yao 1 episode, 2006