Michael O'Neill

Attore

Michael O'Neill

29/05/1951 · Montgomery, Alabama, USA

​From Wikipedia, the free encyclopedia. Michael O'Neill (born May 29, 1951) is an American actor. With a career stretching through three decades, he usually portrays senior law enforcement or military officers. He is perhaps best known for his role as Special agent Ron Butterfield, the head of President Josiah Bartlet's Secret Service detail, on The West Wing. He played CTU Administrative Director Richard Walsh in the first two episodes of 24. He played Sgt. Maj. Ron Cheals in the CBS action-drama series The Unit. He starred in the Season Six 2 part Finale of Grey's Anatomy as the broken widower who holds the hospital hostage with a 9mm while pursuing the doctors responsible for unplugging his wife. His most notable film performances occur in Seabiscuit, Secondhand Lions, Transformers, Dancer, Texas Pop 81, Traffic, Sea of Love, A Quiet Little Marriage, Nothing But the Truth, and Green Zone. O'Neill graduated from Auburn University in 1974. After attending Auburn he spent time under the tutelage of actor Will Geer and his daughter, Ellen, at Theatricum Botanicum in Los Angeles before moving to New York to pursue his career there.

The MentalistSerie TV8.4

The Mentalist

2008

Criminal MindsSerie TV8.3

Criminal Minds

2005

Grey's AnatomySerie TV8.2

Grey's Anatomy

2005

NCIS - Unità anticrimineSerie TV7.6

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NCIS · 2003

CSI: MiamiSerie TV7.7

CSI: Miami

2002

X-FilesSerie TV8.4

X-Files

The X-Files · 1993

Prison BreakSerie TV8.1

Prison Break

2005

S.W.A.T.Serie TV8

S.W.A.T.

2017

24Serie TV7.8

24

2001

NCIS: Los AngelesSerie TV7.5

NCIS: Los Angeles

2009

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La guerra dei mondi

War of the Worlds · 2025

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Sons of Anarchy

2008

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ER · 1994

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JAG - Avvocati in divisa

JAG · 1995

West Wing - Tutti gli uomini del PresidenteSerie TV8.3

West Wing - Tutti gli uomini del Presidente

The West Wing · 1999

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Fringe

2008

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This Is Us

2016

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Boston Legal

2004

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2022

TrackerSerie TV7.6

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2024

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Diagnosis: Murder · 1993

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Senza traccia

Without a Trace · 2002

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Ghost Whisperer - Presenze

Ghost Whisperer · 2005

ScandalSerie TV7.2

Scandal

2012

The ResidentSerie TV8.4

The Resident

2018

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Rizzoli & Isles

2010

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Numb3rs

2005

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The Practice - Professione avvocati

The Practice · 1997

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Chicago Hope

1994

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Crossing Jordan

2001

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Tom Clancy's Jack Ryan

2018

The UnitSerie TV7.4

The Unit

2006

Army Wives - Conflitti del cuoreSerie TV7.5

Army Wives - Conflitti del cuore

Army Wives · 2007

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Bates Motel

2013

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Leverage - Consulenze illegali

Leverage · 2008

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Ally McBeal

1997

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Boston Public

2000

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Roswell

1999

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1996

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2010

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2013

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2016

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2025

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Close to Home · 2005

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Law & Order: LA

2010

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Happy's Place

2024

FlashForwardSerie TV7

FlashForward

2009

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2022

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Extant

2014

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22.11.63

11.22.63 · 2016

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2014

EchoesSerie TV6.6

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2022

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2020

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2012

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2013

LAXSerie TV7

LAX

2004

Air - La storia del grande saltoFilm7.3

Air - La storia del grande salto

Air · 2023

TrafficFilm7.1

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2000

One West WaikikiSerie TV7.7

One West Waikiki

1994