Garrett Cole / ... (6 episodes, 2012-2015)
Professor Hal Barnes (1 episode, 2011)
David Prentiss (1 episode, 2009)
Mike Crespy (1 episode, 2014)
Trevor Mason (1 episode, 2007)
Surgeon #1 (2 episodes, 2006)
Psychiatrist (2 episodes, 2005-2006)
Brian Schilling (1 episode, 2005)
Dr. Ellis (1 episode, 2006)
Professor Stanton (1 episode, 2005)
Congressman Thomas Korb (1 episode, 2004)
Minister (1 episode, 2003)
Reporter #1 (unknown episodes)