Harmon appeared in 437 episodes of NCIS across 19 seasons ... His talent is limitless, his dedication to the role, studying Mark, studying the show — he has a similar leadership quality that ...
NCIS: Origins introduces viewers to a young Leroy Jethro Gibbs as he starts his career at NCIS. The series uncovers key events in his life. It includes personal tragedies and professional challenges.
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