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 ...
The actor played Leroy Jethro Gibbs on 'NCIS' from 2003 to 2021 MarkHarmon will be on hand to help introduce Leroy Jethro Gibbs' backstory. The actor, 73, who portrayed Gibbs on NCIS from 2003 to ...