William Duffy

William Duffy

Acting

William Duffy is an actor.

Known for

The Mentalist

The Mentalist

2008

Criminal Minds

Criminal Minds

2005

Heroes

Heroes

2006

NCIS

NCIS

2003

It's Always Sunny in Philadelphia

It's Always Sunny in Philadelphia

2005

Blast from the Past

Blast from the Past

1999

The O.C.

The O.C.

2003

Beverly Hills, 90210

Beverly Hills, 90210

1990

Bosch

Bosch

2015

Law & Order

Law & Order

1990

Acting27

A West Wing Special to Benefit When We All Vote

A West Wing Special to Benefit When We All Vote

2020

Larry

Bosch

Bosch

2015

Vault Attendant

Scandal

Scandal

2012

Ralph Greenwald

Parenthood

Parenthood

2010

Mr. Carlson

The Ascent

The Ascent

2010

Thomas Shaw

The Mentalist

The Mentalist

2008

TSA Agent #2

Carpoolers

Carpoolers

2007

Heroes

Heroes

2006

ER Doctor

Waist Deep

Waist Deep

2006

Newscaster #2

Karla

Karla

2006

Detective Porter

Criminal Minds

Criminal Minds

2005

Dr. Larson

It's Always Sunny in Philadelphia

It's Always Sunny in Philadelphia

2005

Hedge Fund Guy

Sniper 3

Sniper 3

2004

Richard Addis

NCIS

NCIS

2003

Harris Cobb

The O.C.

The O.C.

2003

(voice)

American Dreams

American Dreams

2002

Father Gregory

The Division

The Division

2001

Commander Jackson

The West Wing

The West Wing

1999

Staffer

Blast from the Past

Blast from the Past

1999

Workman #1

Double Tap

Double Tap

1997

Gas Man

Betrayed by Love

Betrayed by Love

1994

Paxton

Hearts Afire

Hearts Afire

1992

Doctor

Beverly Hills, 90210

Beverly Hills, 90210

1990

Doorman

Law & Order

Law & Order

1990

CSU Technician

The Two Jakes

The Two Jakes

1990

Desk Sergeant

Loving

Loving

1970

Jay

Brainstorm

Brainstorm

1965

Orderly (uncredited)

Production1

Death Game

Death Game

1977

Executive Producer