Evan Hinkle (1 episode, 2009)
Mitch Cavanaugh (1 episode, 2009)
Barclay (1 episode, 2009)
Barry Cunningham (10 episodes, 2007)
Frank Jeffries (1 episode, 2006)
Mr. Cathcart (1 episode, 2006)
Ivan Bakunas (1 episode, 2009)
Nick Martin (1 episode, 2006)
Lazaro (2 episodes, 2012)
German Acrobat 1 episode, 2004
Gary Nordin - Warren's Replacement
Samuel Donald 'Sam' Clarkson / ... (3 episodes, 2003)
Temporal Agent Daniels / ... (8 episodes, 2001-2004)
Terry (4 episodes, 2003-2004)
Dr. Jeffrey Steadman (5 episodes, 2001-2009)
Photographer (1 episode, 2004)
Jeremy Brenner / ... (4 episodes, 1998-2000)
the Charity Clerk (1 episode, 2003)