Mark Harmon, an American actor, producer, writer, former football player, and director, is best known for portraying Leroy Jethro Gibbs in NCIS.

When Mark Harmon initially read the script for the long-running drama series "NCIS," he was immediately drawn in, and the ...

Add Yahoo as a preferred source to see more of our stories on Google. Mark Harmon as NCIS Special Agent Leroy Jethro Gibbs in NCIS - Cliff Lipson/CBS “I don’t know,” Harmon admits to TV Insider.

He's been playing Leroy Jethro Gibbs on NCIS for the better part of two decades, and while many fans may wonder why Mark ...

Now that we’re going to see Mark Harmon onscreen again as Leroy Jethro Gibbs, what are the chances he reprises the role again in the future? He’s appearing in the Tuesday, November 11, NCIS and NCIS: ...