Michael O'Neill | |
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Occupation | Film, television actor |
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 CBS' long-running action drama series The Unit. He starred in the Season 6 two-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, actress Ellen Geer, at Theatricum Botanicum in Los Angeles before moving to New York to pursue his career there.
Contents |
Year | Title | Role | Episode |
---|---|---|---|
1990 | H.E.L.P. | Cabot | Are You There, Alpha Centauri? |
1992 | L.A. Law | My Friend Flicker | |
1994 | Picket Fences | Prosecutor Larry Adler | System Down |
1995 | Days of our Lives | Father Jansen | 2 episodes |
One West Waikiki | Manpower | ||
1996 | The Cape | Keith Mason | The Need to Know |
1997 | The Pretender | Captain Harrigan | The Better Part of Valor |
Millenium | County Prosecutor Calvin Smith | Covenant | |
Orleans | Luther's Temptation | ||
The Shining (TV mini-series) | Dr. Daniel Edwards | 1 episode | |
1998 | The X-Files | The Patrol Captain | Drive |
1999 | Roswell | Phillip Evans | The Morning After |
JAG | Cmdr. Bradley | Shakedown | |
1999–2006 | The West Wing | Secret Service Agent Ron Butterfield | 16 episodes |
2000 | Chicago Hope | Bill Wyzinski | Everybody's Special at Chicago Hope |
2001 | NYPD Blue | Capt. Chuck Dowling | Peeping Tommy |
Diagnosis: Murder | Sheriff Buck O'Hara | No Good Deed | |
24 | Richard Walsh | 12:00 a.m.-1:00 a.m., 1:00 a.m.-2:00 a.m.]] | |
2001–2002 | Boston Public | Dr. Bernard Colbert | Chapter Twenty-Four, Chapter Twenty-Seven, Chapter Twenty-Eight, Chapter Thirty-One |
2002 | Ally McBeal | Dr. Colbert | All of Me |
Without a Trace | Thomas Shannon | Silent Partner | |
2003 | Presidio Med | Breathless | |
Carnivàle | Sheiff Lyle Donovan | Tipton | |
2004 | The Practice | Judge Robert Temple | Police State |
Judging Amy | D.A. Dave Sherman | My Little Runaway | |
Crossing Jordan | Chris Benz | Out of Sight | |
LAX | Alonso Mathews | Unscheduled Arrivals | |
2005 | Boston Legal | Dr. Robert McLean | It Girls and Beyond |
Cold Case | Warren Cousins 2005 | Revolution | |
ER | Col. Ken Kilner | Here and There | |
Commander in Chief | Congressman Wilcox | First Strike, First Scandal | |
JAG | Maj. Gen. Harold Rossing | Fair Winds and Following Seas | |
2006 | Close to Home | Don Wheeler | The Rapist Next Door |
3 lbs | James Wills | Lost for Words | |
2006–2007 | The Unit | Ron Cheals | First Responders, Dedication, SERE, Exposure, Off the Meter, Paradise Lost |
The Nine | Pete Burton | Pilot, Heroes Welcome, The Inside Man | |
2007 | Lincoln Heights | Captain | Suspicion |
K-Ville | Father Dennehy | Critical Mass | |
Criminal Minds | Det. Yarbough | About Face | |
2008 | Women's Murder Club | FBI Agent Ted Thorne | Never Tell |
The Mentalist | Sheriff Nelson | Redwood | |
Prison Break | Herb Stanton | Shut Down, Selfless | |
My Own Worst Enemy | Alexander DeSantos | Love in All the Wrong Places | |
Leverage | Judge Roy | The Bank Shot Job | |
2009 | FlashForward | CIA Director Mr. Keller | Gimme Some Truth |
Ghost Whisperer | Male Ghost | Ghost Busted | |
Army Wives | Reverent Bankerd | Family Readiness, Disengagement | |
Sons of Anarchy | Fa Guan | ||
2010 | Numb3rs | Boyd Keene | Scratch |
Fringe | Sheriff Velchik | Johari Window | |
Miami Medical | Dr. Bruce Kaye | 88 Seconds | |
Grey's Anatomy | Gary Clark | Sympathy for Parents, How Insensitive, Sanctuary, Death and All His friends | |
NCIS | Former NCIS Special Agent Riley McCallister | Enemies Foreign, Enemies Domestic |