Thomas Mark Harmon (born September 2, 1951) is an American actor. Since the mid-1970s, he has appeared in a variety of television, film and stage roles following a brief career as a collegiate football player with the UCLA Bruins. Since 2003, Harmon has starred as Leroy Jethro Gibbs in the hit CBS series NCIS.
Mark has made his career on both medical and law enforcement roles although has appeared in a variety of other acting roles. Harmon's career reached several other high points in 1986. In January, he was named People magazine's Sexiest Man Alive. He still does it for me. I think he just gets better with age.
I read John Sandford’s Prey novels voraciously and Mark Harmon played the hero in Certain Prey, definitely NOT who I would have chosen to depict Lucas Davenport, but he came pretty close.