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William Duffy

★ Acting #42,119

• Acting

Known for: Acting

William Duffy

★ Acting #42,119

William Duffy is an actor.

Known For

The Mentalist

84%

TSA Agent #2

2008

Criminal Minds

83%

Dr. Larson

2005

Heroes

74%

ER Doctor

2006

NCIS

76%

Harris Cobb

2003

It's Always Sunny in Philadelphia

83%

Hedge Fund Guy

2005

The O.C.

77%

(voice)

2003

Beverly Hills, 90210

73%

Doorman

1990

Bosch

79%

Vault Attendant

2015

A West Wing Special to Benefit When We All Vote

79%

Larry

2020

Bosch

79%

Vault Attendant

2015

Scandal

72%

Ralph Greenwald

2012

Parenthood

75%

Mr. Carlson

2010

The Ascent

32%

Thomas Shaw

2010

The Mentalist

84%

TSA Agent #2

2008

Carpoolers

71%

Unknown

2007

Heroes

74%

ER Doctor

2006

Waist Deep

64%

Newscaster #2

2006

Karla

54%

Detective Porter

2006

Criminal Minds

83%

Dr. Larson

2005

It's Always Sunny in Philadelphia

83%

Hedge Fund Guy

2005

Sniper 3

55%

Richard Addis

2004

NCIS

76%

Harris Cobb

2003

The O.C.

77%

(voice)

2003

American Dreams

52%

Father Gregory

2002

The Division

71%

Commander Jackson

2001

The West Wing

83%

Staffer

1999

Blast from the Past

68%

Workman #1

1999

Double Tap

51%

Gas Man

1997

Betrayed by Love

65%

Paxton

1994

Hearts Afire

78%

Doctor

1992

Beverly Hills, 90210

73%

Doorman

1990

Law & Order

73%

CSU Technician

1990

The Two Jakes

60%

Desk Sergeant

1990

Death Game

59%

Executive Producer

1977

Loving

60%

Jay

1970

Brainstorm

61%

Orderly (uncredited)

1965