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William Duffy

William Duffy

Acting

27 Credits

Biography

William Duffy is an actor.

Known For

Law & Order

Law & Order

1990

NCIS

NCIS

2003

Criminal Minds

Criminal Minds

2005

The Mentalist

The Mentalist

2008

Beverly Hills, 90210

Beverly Hills, 90210

1990

The West Wing

The West Wing

1999

Bosch

Bosch

2015

It's Always Sunny in Philadelphia

It's Always Sunny in Philadelphia

2005

Scandal

Scandal

2012

Heroes

Heroes

2006

Parenthood

Parenthood

2010

The O.C.

The O.C.

2003

The Division

The Division

2001

American Dreams

American Dreams

2002

Hearts Afire

Hearts Afire

1992

Blast from the Past

Blast from the Past

1999

Carpoolers

Carpoolers

2007

Waist Deep

Waist Deep

2006

Double Tap

Double Tap

1997

Sniper 3

Sniper 3

2004

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