Mark Harmon is known for his role as _ Leroy Jethro Gibbs_ on the CBS TV show "NCIS (2003-)".
He also played this role on the TV shows "JAG" and "NCIS: New Orleans".

He played Fielding Carlyle on the NBC TV soap drama "Flamingo Road (1980-1982)", Dr. Robert Caldwell (1983-1988) on the NBC TV medical show "St. Elsewhere (1982-1988)", Detective Dicky Cobb on the NBC TV police show "Reasonable Doubts (1991-1993)" and Dr. Jack McNeil (1996-2000) on the CBS TV medical show "Chicago Hope (1994-2000)".

Some other TV shows he appeared on are "Ozzie's Girls", "Emergency!", "Adam-12", "Eleanor and Franklin ", "Laverne & Shirley", "Police Woman", "Delvecchio", "Police Story", "The Hardy Boys/Nancy Drew Mysteries", "Sam", "Centennial", "240-Robert", "The Dream Merchants", "The Love Boat", "Moonlighting", "Harts of the West", "Strangers", "Charlie Grace", "From the Earth to the Moon" and "The West Wing".

He played Jay Austin in the movie "The Presidio (1988)", Sheriff John Behan in "Wyatt Earp (1994)", Ryan in "Freaky Friday (2003)" and Deputy Chief Lucas Davenport in "Certain Prey (2011)".

Some other movies he appeared in are "Getting Married (1978)", "Little Mo (1978)", "Comes a Horseman (1978)", "Beyond the Poseidon Adventure (1979)", "Goliath Awaits (1981)", "Intimate Agony (1983)", "Tuareg: The Desert Warrior (1984)", "Prince of Bel Air (1986)", "The Deliberate Stranger (1986)", "Let's Get Harry (1986)", "Summer School (1987)", "After the Promise (1987)", "Stealing Home (1988)", "Sweet Bird of Youth (1989)", "Worth Winning (1989)", "Dillinger (1991)", "Fourth Story (1991)", "Long Road Home (1991)", "Shadow of a Doubt (1991)", "Till There Was You (1991)", "Cold Heaven (1991)", "Original Sins (1995)", "Magic in the Water (1995)", "The Last Supper (1995)", "Casualties (1997)", "The first to Go (1997)", "Fear and Loathing in Las Vegas (1998)", "The Amati Girls (2000)", "For All Time (2000)", "I'll Remember April (2000)", "Crossfire Trail (2001)", "And Never Let Her Go (2001)", "Local Boys (2002)", "Chasing Liberty (2004)" and "Weather Girl (2009)".

Happy Birthday!