
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.
Serie TV8.4The Mentalist
2008
Serie TV8.3Criminal Minds
2005
Serie TV8.2Grey's Anatomy
2005
Serie TV7.6NCIS - Unità anticrimine
NCIS · 2003
Serie TV7.7CSI: Miami
2002
Serie TV8.4X-Files
The X-Files · 1993
Serie TV8.1Prison Break
2005
Serie TV8S.W.A.T.
2017
Serie TV7.824
2001
Serie TV7.5NCIS: Los Angeles
2009
Film4La guerra dei mondi
War of the Worlds · 2025
Serie TV8.4Sons of Anarchy
2008
Serie TV7.8E.R. - Medici in prima linea
ER · 1994
Serie TV7.3JAG - Avvocati in divisa
JAG · 1995
Serie TV8.3West Wing - Tutti gli uomini del Presidente
The West Wing · 1999
Serie TV8.1Fringe
2008
Serie TV8.2This Is Us
2016
Serie TV7.9Boston Legal
2004
Serie TV8Fire Country
2022
Serie TV7.6Tracker
2024
Serie TV7.1Un detective in corsia
Diagnosis: Murder · 1993
Serie TV7.2Senza traccia
Without a Trace · 2002
Serie TV8.1Ghost Whisperer - Presenze
Ghost Whisperer · 2005
Serie TV7.2Scandal
2012
Serie TV8.4The Resident
2018
Serie TV7.9Rizzoli & Isles
2010
Serie TV7Numb3rs
2005
Serie TV7.6The Practice - Professione avvocati
The Practice · 1997
Serie TV7.2Chicago Hope
1994
Serie TV7.2Crossing Jordan
2001
Serie TV7.7Tom Clancy's Jack Ryan
2018
Serie TV7.4The Unit
2006
Serie TV7.5Army Wives - Conflitti del cuore
Army Wives · 2007
Serie TV8Bates Motel
2013
Serie TV7.6Leverage - Consulenze illegali
Leverage · 2008
Serie TV6.5Ally McBeal
1997
Serie TV7.6Boston Public
2000
Serie TV7.7Roswell
1999
Serie TV7.7Millennium
1996
Serie TV7The Glades
2010
Serie TV7.6Rectify
2013
Serie TV7.2Shooter
2016
Serie TV6.8Happy Face
2025
Serie TV5.9Close to Home - Giustizia ad ogni costo
Close to Home · 2005
Serie TV6.8Law & Order: LA
2010
Serie TV6.4Happy's Place
2024
Serie TV7FlashForward
2009
Serie TV6.9Outer Range
2022
Serie TV6.3Extant
2014
Serie TV7.822.11.63
11.22.63 · 2016
Serie TV7Manhattan
2014
Serie TV6.6Echoes
2022
Serie TV7.5Una donna alla Casa Bianca
Commander in Chief · 2005
Serie TV7.3Messiah
2020
Serie TV6.9Vegas
2012
Film7.9Dallas Buyers Club
2013
Serie TV7LAX
2004
Film7.3Air - La storia del grande salto
Air · 2023
Film7.1Traffic
2000
Serie TV7.7One West Waikiki
1994
