Michael O'Neill played Gary Clark in season six of Grey's Anatomy.
Career
Filmography
- J. Edgar (2011)
- Green Zone (2010)
- Flying Lessons (2010)
- A Quiet Little Marriage (2008)
- Nothing But the Truth (2008)
- Crazy (2008)
- Transformers (2007)
- Around the Bend (2004)
- Plainsong (2004)
- Secondhand Lions (2003)
- Seabiscuit (2003)
- Dreamcatcher (2003)
- The Board Room (2002)
- Traffic (2000)
- The Legend of Bagger Vance (2000)
- ATF (1999)
- The Mod Squad (1999)
- Dancer, Texas Pop. 81 (1998)
- Host (1998)
- Standoff (1998)
- The Sunchaser (1996)
- Norma Jean & Marilyn (1996)
- Bushwhacked (1995)
- Awake to Danger (1995)
- Beyond Betrayal (1994)
- Blind Justice (1994)
- Victim of Love: The Shannon Mohr Story (1993)
- For Their Own Good (1993)
- Lorenzo's Oil (1992)
- Jennifer Eight (1992)
- The Gun in Betty Lou's Handbag (1992)
- An Unremarkable Life (1989)
- Sea of Love (1989)
- Ghost Story (1981)
Television
- Necessary Roughness (2012-2013)
- Rectify (2012-2013)
- Vegas (2012)
- NCIS (2010-2012)
- CSI: Miami (2012)
- Prime Suspect (2011)
- The Glades (2011)
- Law & Order: LA (2010)
- Miami Medical (2010)
- Grey's Anatomy (2010)
- Fringe (2010)
- Numb3rs (2010)
- Sons of Anarchy (2009)
- FlashForward (2009)
- Army Wives (2009)
- Ghost Whisperer (2009)
- Leverage (2008)
- My Own Worst Enemy (2008)
- Prison Break (2008)
- The Mentalist (2008)
- Women's Murder Club (2008)
- Criminal Minds (2007)
- K-Ville (2007)
- The Nine (2006-2007)
- The Unit (2006-2007)
- Lincoln Heights (2007)
- 3 lbs. (2006)
- The West Wing (1999-2006)
- Close to Home (2006)
- Laws of Chance (2006)
- Commander in Chief (2005)
- JAG (1999-2005)
- ER (2005)
- Cold Case (2005)
- Boston Legal' (2005)
- LAX (2004)
- Crossing Jordan (2004)
- Judging Amy (2004)
- The Practice (2004)
- Carnivàle (2003)
- Presidio Med (2003)
- Without a Trace (2002)
- Ally McBeal (2002)
- Boston Public (2001-2002)
- 24 (2001)
- Diagnosis Murder (2001)
- NYPD Blue (2001)
- Chicago Hope (2000)
- Roswell (1999)
- The X-Files (1998)
- Mercy Point (1998)
- The Shining (mini-series) (1997)
- Orleans (1997)
- Millennium (1997)
- The Pretender (1997)
- The Cape (1996)
- One West Waikiki (1995)
- Days of Our Lives (1995)
- Picket Fences (1994)
- L.A. Law (1992)
- H.E.L.P. (1990)