Mark Harmon NewsLatest News On Mark Harmon NCIS Franchise Celebrates 1,000 Episodes with Consistent Gripping Storylines4/11/2024 2:59 PM 'NCIS' Celebrates 1,000 Episodes: See Never-Before-Seen Interviews With the Cast (Exclusive)4/8/2024 5:39 PM Mark Harmon Talks About the Success of 'NCIS' and His New Book11/15/2023 4:12 AM