Mark Harmon did not grow up in a show business family, but instead, played football through college, and that athletic background might explain why so many of his best movies and TV shows include ...

Ever since Mark Harmon's beloved NCIS character Leroy Jethro Gibbs said goodbye to his team and hello to Alaska in season 19, episode 4, "The Great Wide Open," fans have missed his signature charm.

Updated by Jordan Iacobucci on June 2, 2025: Mark Harmon was a fixture of the NCIS franchise for nearly two decades, originating the role of Leroy Jethro Gibbs.However, Harmon departed during the ...