Lt. Colonel John Sheppard
Jeff Weaver (1 episode, 2009)
Robert Danzig (1 episode, 2011)
Himself (3 episodes, 2009-2010)
FBI Agent John Ash (2 episodes, 2007-2008)
Lt. Colonel John Sheppard / ... 99 episodes, 2004-2009
Andrew Webb (1 episode, 2003)
Julian Lodge (13 episodes, 2002)
Det. Claude Morton 1 episode, 2002
Dr. David Marcus (4 episodes, 1999)
Vincent (2 episodes, 1998)
Alex DeMouy (4 episodes, 1998)
Dr. Tom Arquette (4 episodes, 2000)
Brian Kohler-Voss (15 episodes, 1995-1996)