William Duffy is an actor.
TV · Watched
Law & Order
1990 · CSU Technician
The Mentalist
2008 · TSA Agent #2
NCIS
2003 · Harris Cobb
Criminal Minds
2005 · Dr. Larson
The West Wing
1999 · Staffer
Bosch
2015 · Vault Attendant
Heroes
2006 · ER Doctor
Beverly Hills, 90210
1990 · Doorman
Scandal
2012 · Ralph Greenwald
It's Always Sunny in Philadelphia
2005 · Hedge Fund Guy
The O.C.
2003 · (voice)
Parenthood
2010 · Mr. Carlson
The Division
2001 · Commander Jackson
American Dreams
2002 · Father Gregory
Hearts Afire
1992 · Doctor
Blast from the Past
1999 · Workman #1
Carpoolers
2007
Sniper 3
2004 · Richard Addis
