William Duffy

William Duffy

Biography

William Duffy is an actor.

Known For

The Mentalist

The Mentalist

2008★ 8.4
NCIS

NCIS

2003★ 7.6
Law & Order

Law & Order

1990★ 7.3
Criminal Minds

Criminal Minds

2005★ 8.3
The O.C.

The O.C.

2003★ 7.7
The West Wing

The West Wing

1999★ 8.3
Beverly Hills, 90210

Beverly Hills, 90210

1990★ 7.3
It's Always Sunny in Philadelphia

It's Always Sunny in Philadelphia

2005★ 8.2
Heroes

Heroes

2006★ 7.4
Scandal

Scandal

2012★ 7.2
Bosch

Bosch

2015★ 7.9
Parenthood

Parenthood

2010★ 7.5
The Division

The Division

2001★ 7.1
American Dreams

American Dreams

2002★ 5.2
Hearts Afire

Hearts Afire

1992★ 7.6
Blast from the Past

Blast from the Past

1999★ 6.8
Carpoolers

Carpoolers

2007★ 7.1
Sniper 3

Sniper 3

2004★ 5.5
The Two Jakes

The Two Jakes

1990★ 6.0
Waist Deep

Waist Deep

2006★ 6.6
Karla

Karla

2006★ 5.4
Double Tap

Double Tap

1997★ 5.1
A West Wing Special to Benefit When We All Vote

A West Wing Special to Benefit When We All Vote

2020★ 7.9
Brainstorm

Brainstorm

1965★ 6.1