Mark Harmon Leaves 'NCIS' After 19 Seasons

WARNING: SPOILERS AHEAD! Mark Harmon has said goodbye to NCIS. The 70-year-old actor’s exit was revealed during the most recent episode of the long-running CBS series, after his character, Leroy Jethro Gibbs, chose to leave the agency. Click inside to read more about Mark’s exit… Mark‘s Gibbs had been saying his goodbyes throughout the episode [...]