William Duffy
Acting
William Duffy is an actor.
Acting
A West Wing Special to Benefit When We All Vote
Larry
2020
Bosch
Vault Attendant
2015
Scandal
Ralph Greenwald
2012
Parenthood
Mr. Carlson
2010
The Ascent
Thomas Shaw
2010
The Mentalist
TSA Agent #2
2008
Carpoolers
2007
Heroes
ER Doctor
2006
Waist Deep
Newscaster #2
2006
Karla
Detective Porter
2006
Criminal Minds
Dr. Larson
2005
It's Always Sunny in Philadelphia
Hedge Fund Guy
2005
Sniper 3
Richard Addis
2004
NCIS
Harris Cobb
2003
The O.C.
(voice)
2003
American Dreams
Father Gregory
2002
The Division
Commander Jackson
2001
The West Wing
Staffer
1999
Blast from the Past
Workman #1
1999
Double Tap
Gas Man
1997
Betrayed by Love
Paxton
1994
Hearts Afire
Doctor
1992
Beverly Hills, 90210
Doorman
1990
Law & Order
CSU Technician
1990
The Two Jakes
Desk Sergeant
1990
Death Game
Executive Producer
1977
Loving
Jay
1970
Brainstorm
Orderly (uncredited)
1965