Mark Harmon, an American actor, producer, writer, former football player, and director, is best known for portraying Leroy Jethro Gibbs in NCIS.
“NCIS” legend Mark Harmon is bringing his OG Leroy Jethro Gibbs character to the prequel series “NCIS: Origins,” and he’s not coming alone. Harmon, 74, will make a rare guest appearance on “Origins” ...
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The untold truth of Mark Harmon
He's been playing Leroy Jethro Gibbs on NCIS for the better part of two decades, and while many fans may wonder why Mark ...
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