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'NCIS' Cast: Before They Were …
Gibbs and McGee
People's Choice Awards Photos: Mark Harmon on CBS.com
young mark harmon
Mark Harmon as Leroy Jethro Gibbs in the NCIS episode Rule Fifty-One
Mark Harmon - Celebrity School Pic
Thomas Mark Harmon is actor mark Harmon's full name
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Mark Harmon as Leroy Jethro Gibbs in NCIS episode Probie.