William Duffy
William Duffy is an actor.
- Known for
- Acting
Known for
- The Mentalist (2008) — TSA Agent #2
- Criminal Minds (2005) — Dr. Larson
- Heroes (2006) — ER Doctor
- NCIS (2003) — Harris Cobb
- It's Always Sunny in Philadelphia (2005) — Hedge Fund Guy
- Blast from the Past (1999) — Workman #1
- The O.C. (2003) — (voice)
- Beverly Hills, 90210 (1990) — Doorman
- Bosch (2015) — Vault Attendant
- Law & Order (1990) — CSU Technician
- Scandal (2012) — Ralph Greenwald
- The West Wing (1999) — Staffer
- Waist Deep (2006) — Newscaster #2
- The Two Jakes (1990) — Desk Sergeant
- Parenthood (2010) — Mr. Carlson
- Sniper 3 (2004) — Richard Addis