Leroy Jethro Gibbs is a fictional character and protagonist from the NCIS television series by CBS Television. He is portrayed by Mark Harmon.
Gibbs' age has never been revealed, but it was shown in the episode "Heartland" that he was born in rural Stillwater, Pennsylvania. His father, Jackson Gibbs (played by Ralph Waite), owns a store ("Stillwater General Store") in the same town. It has been mentioned in the episode "Frame Up" that Gibbs' father was possibly in the United States Army Air Force because Gibbs refers to a pin-up on his father's P-51 Mustang. He is named after his father's friend, Leroy Jethro, who was his business partner in the store after having worked together in the coal mines (Winslow Mining Company). The younger Gibbs left Stillwater in 1976 at the approximate age of 18-20 and, according to his own statements, did not return for over thirty years. In a flashback seen in the episode, Jethro often provoked violence with defiance to his father, who constantly comes to his unwanted aid with a Winchester rifle or shotgun. He was also known around the area as a delinquent, as said by the new sheriff, one of the other delinquents during his teenage years, stating "Funny, never expected to find you on the same side of the law."
A former Marine Scout Sniper and Military Police NCO, Gibbs is portrayed as a consummate organizer, disciplined and demanding. These traits often put him in a stand-off with other authorities when they exert pressure on his team. In the JAG episode "Ice Queen", it is stated that he is a Marine reservist. Although he has not served as an active Marine in some time, he retains enough of his marksmanship skills to kill Ziva's captors in the premiere of season 7, "Truth or Consequences," and to out-shoot a professional hit-man in "South by Southwest."
In "Under Covers," Abby Sciuto wishes him "happy birthday" on November 10, referring to the Marine Corps birthday.
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Official Site: CBS
Links: Wiki Crimelab.com NCIS/CBS