Mark Harmon is leaving CBS’s ‘NCIS’ after 18 seasons
Longtime ‘NCIS’ star Mark Harmon is leaving the series after 18 seasons. The 70-year-old Harmon appeared as Special Agent Leroy Jethro Gibbs in his final episode of the police procedural series on Monday, which showed Gibbs deciding to remain in Alaska indefinitely after solving a case. Gibbs told his partner, Special Agent Timothy McGee (Sean Murray): “I’m not going back, Tim. I’m not going back home.”