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Michael O'Neill

​From Wikipedia, the free encyclopedia. Michael O'Neill 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.

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Movie/TV Credits:
First Appeared:
In the movie Juventud rebelde (Destino: escapar) 1977-08-17
Latest Project:
Series 11.22.63 2016-02-15
Known For
Poster of Bates Motel
Poster of The Glades
Poster of Prison Break
Poster of El cazador de sueños
Series 11.22.63 Mr. Price 2016-02-15
Pelicula El asesino durmiente Detective Simms 2014-03-15
Series Extant Alan Sparks 2014-07-09
Pelicula Dallas Buyers Club Richard Barkley 2013-11-17
Series Bates Motel Nick Ford 2013-03-18
Series Rizzoli & Isles Jonathan McKnight 2010-07-12
Series The Glades Trent Staley 2010-07-11
Pelicula Green Zone: Distrito protegido Colonel Bethel 2010-03-11
Series FlashForward CIA Director Keller 2009-09-24
Pelicula Crazy Ralph Christianson 2008-03-02
Pelicula A Quiet Little Marriage Bruce 2008-11-07
Series Fringe (Al límite) Unknown 2008-09-09
Series El mentalista Sheriff Nelson 2008-09-23
Pelicula Transformers Tom Banacheck 2007-06-27
Series The Nine Pete Burton 2006-10-04
Series Prison Break Unknown 2005-08-29
Series Anatomía de Grey Unknown 2005-03-27
Pelicula Around the Bend Cowboy 2004-10-08
Pelicula El secreto de los McCann Ralph 2003-09-19
Pelicula El cazador de sueños General Matheson 2003-03-21
Series 24 Richard Walsj 2001-11-06
Pelicula Traffic Lawyer Rodman 2000-12-27
Pelicula La leyenda de Bagger Vance O.B. Keeler 2000-11-02
Series Roswell Unknown 1999-10-06
Series El ala oeste de la Casa Blanca Unknown 1999-09-22
Pelicula ATF Asst. A.T.F. Director Ben Walker 1999-09-06
Pelicula Virtual Obsession 1998-02-01
Pelicula Dancer, Texas Pop. 81 Mr. Lusk 1998-05-01
Pelicula The Sunchaser Agent Moreland 1996-05-29
Series Chicago Hope Unknown 1994-09-18
Pelicula Victim of Love: The Shannon Mohr Story Dick Britton 1993-11-09
Series Expediente X Unknown 1993-09-10
Pelicula For Their Own Good Clark Thompson 1993-04-05
Pelicula An Unremarkable Life Michael 1989-10-12
Pelicula Molly Lyle 1983-12-27
Pelicula Juventud rebelde (Destino: escapar) Henderson's Assistant 1977-08-17