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.
2005 • TV
2025 • Movie
2003 • TV
2005 • TV
2008 • TV
2025 • Movie
as Secretary of Defense Walter Crystal
as Frank
as CIA Director
as Richard Barkley
as Joe Dean
as Detective Simms
as Detective Brickman
as Lawyer Rodman
as Tom Banacheck
as Gen. Matheson
as Colonel Bethel
as Ralph
as Bruce
as Clark Thompson
as Mr. Pollard
as Beckwith
as Senator McKellar
as Chaplain Rogers
as O.B. Keeler
as Christian
Producer
as Gary Clark
4 episodes
as Riley McCallister
3 episodes
as Det. Yarbough
1 episodes
as Sheriff Nelson
1 episodes
as Patrol Captain Van Gelder
1 episodes
as Herb Stanton
1 episodes
as Carl Luca
3 episodes
as Richard Welsh
1 episodes
as Richard Walsh
1 episodes
as Anthony Franklin
1 episodes
as Senator Mitchell Chapin
5 episodes
as Sheriff Velchik
1 episodes
as Joshua Williams
1 episodes
as Ron Butterfield
15 episodes
as Ret. U.S. Army General Richard Collins
1 episodes
as Lonnie Mencken
5 episodes
as Commander Bradley
1 episodes
as Col. Ken Kilner
1 episodes
as Nolan
1 episodes
as Arlo
1 episodes
