Biography
William Duffy is an actor.
Known For
The Mentalist
23 Sep 2008
Criminal Minds
22 Sep 2005
Heroes
25 Sep 2006
NCIS
23 Sep 2003
It's Always Sunny in Philadelphia
04 Aug 2005
Blast from the Past
12 Feb 1999
The O.C.
05 Aug 2003
Beverly Hills, 90210
04 Oct 1990
Filmography
2020
2015
- Boschas Vault Attendant1 episode
2012
- Scandalas Ralph Greenwald1 episode
2010
- Parenthoodas Mr. Carlson1 episode
- The Ascentas Thomas Shaw
2008
- The Mentalistas TSA Agent #21 episode
2007
- Carpoolers1 episode
2006
- Heroesas ER Doctor1 episode
- Waist Deepas Newscaster #2
- Karlaas Detective Porter
2005
- Criminal Mindsas Dr. Larson1 episode
- It's Always Sunny in Philadelphiaas Hedge Fund Guy1 episode
2004
- Sniper 3as Richard Addis
2002
- American Dreamsas Father Gregory1 episode
2001
- The Divisionas Commander Jackson1 episode
1999
- The West Wingas Staffer46 episodes
- Blast from the Pastas Workman #1
1997
- Double Tapas Gas Man
1994
- Betrayed by Loveas Paxton
1992
- Hearts Afireas Doctor1 episode
1990
- Beverly Hills, 90210as Doorman1 episode
- Law & Orderas CSU Technician1 episode
- The Two Jakesas Desk Sergeant
1970
- Lovingas Jay
1965
- Brainstormas Orderly (uncredited)