Biography

William Duffy is an actor.

Filmography

Acting

Production

View Law & Order

Law & Order

1990•Series•

7.3

View NCIS

NCIS

2003•Series•

7.6

View The Mentalist

The Mentalist

2008•Series•

8.4

View Criminal Minds

Criminal Minds

2005•Series•

8.3

View The West Wing

The West Wing

1999•Series•

8.2

View Beverly Hills, 90210

Beverly Hills, 90210

1990•Series•

7.3

View Heroes

Heroes

2006•Series•

7.4

View It's Always Sunny in Philadelphia

It's Always Sunny in Philadelphia

2005•Series•

8.3

View Bosch

Bosch

2015•Series•

7.9

View Scandal

Scandal

2012•Series•

7.2

View The O.C.

The O.C.

2003•Series•

7.7

View The Division

The Division

2001•Series•

7.1