Biography
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.
Known For
Filmography
حرب العوالم
as Secretary of Defense Walter Crystal
المتعقّب
as Buck Avery
The Resident
as Joshua Williams
جاك ريان لتوم كلانسي
as Senator Mitchell Chapin
S.W.A.T.
as Carl Luca
This Is Us
as Arlo
نادي دالاس للمشترين
as Richard Barkley
Scandal
as Lonnie Mencken
Rizzoli & Isles
as Jonathan McKnight
NCIS: Los Angeles
as Ret. U.S. Army General Richard Collins
أبناء الفوضى
as Anthony Franklin
الوسيط الروحي
as Sheriff Nelson
هامشية
as Sheriff Velchik
Ghost Whisperer
as Nolan
Numb3rs
as Boyd Keene
الهروب من السجن
as Herb Stanton
تشريح غراي
as Gary Clark
عقول إجرامية
as Det. Yarbough
Boston Legal
as Dr. Robert McLean
إن سي آي أس
as Riley McCallister
CSI: Miami
as Jerry Blackburn
Without a Trace
as Thomas Shannon
24
as Richard Walsh
Crossing Jordan
as Chris Benz
Traffic
as Lawyer Rodman
الجناح الغربي
as Ron Butterfield
JAG
as Commander Bradley
Chicago Hope
as Bill Wyzinski
ER
as Col. Ken Kilner
Diagnosis: Murder
as Sheriff Buck O'Hara
ملفات إكس
as Patrol Captain Van Gelder