Michael O'Neill
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.
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Traffic
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Dallas Buyers Club
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Green Zone
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The Mod Squad
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Sea of Love
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Secondhand Lions
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Seabiscuit
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Nothing But the Truth
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Indivisible
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A Quiet Little Marriage
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Grey's Anatomy
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NCIS
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Prison Break
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Criminal Minds
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The Mentalist
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S.W.A.T.
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24
as Richard WelshCounterterrorism agent Jack Bauer fights the bad guys of the world, a day at a time. With each...
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24
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Fringe
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The X-Files
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Ghost Whisperer
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NCIS: Los Angeles
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The West Wing
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Without a Trace
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Leverage
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Diagnosis: Murder
as Sheriff Buck O'HaraDr. Mark Sloan is a good-natured, offbeat physician who is called upon to solve murders.
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Tom Clancy's Jack Ryan
as Senator Mitchell ChapinWhen CIA analyst Jack Ryan stumbles upon a suspicious series of bank transfers his search for...
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Crossing Jordan
as Chris BenzCrossing Jordan is an American television crime/drama series that stars Jill Hennessy as Jordan...
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Bates Motel
as Nick FordA "contemporary prequel" to the 1960 film Psycho, depicting the life of Norman Bates and his...
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Chicago Hope
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The Unit
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Millennium
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Roswell
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Shooter
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Outer Range
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Manhattan
as PsychiatristSet against the backdrop of the greatest clandestine race against time in the history of science...
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The Glades
as Trent StaleyThis crime series follows Jim, a Chicago cop who gets kicked off the force after being shot and...
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Law & Order: LA
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Rectify
as Senator Roland FoulkesAfter 19 years on Death Row for the rape and murder of his teenage girlfriend, Daniel Holden is...
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Extant
as Alan SparksAn astronaut returns home from a year long solo mission in space. She tries to reconnect with...
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FlashForward
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as Jim JackowayBobbie inherits her father's restaurant and is less than thrilled to discover that she has a new...
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as Cameron CollierA wary CIA officer investigates a charismatic man who sparks a spiritual movement and stirs...
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as Congressman WilcoxMackenzie Allen has a lot on her plate -- she has twin teenagers, a 6-year-old at home and an...
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The Romanoffs
as Ron HopkinsAn anthology series centered around people who believe themselves to be the modern-day...
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The Shining
as Daniel Edwards (uncredited)A new caretaker moves with his family into the mysterious Overlook Hotel for the winter.
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Echoes
as Victor McClearyIdentical twins Leni and Gina have secretly switched places for years. But when one sister...
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LAX
as Alonso MathewsLAX is a television drama set at the Los Angeles International Airport and draws its name from...
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One West Waikiki
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The Nine
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