Mark Harmon and Leon Carroll Jr. to Release Real-Life 'NCIS' Story in Non-Fiction Book 'Ghosts of Honolulu'

'NCIS' 450th Episode Celebrates Mark Harmon's Tenure & Producer Opened Up About Gibbs' Possible Return

'NCIS' Cast Credits Mark Harmon for Having Led Franchise With 'Integrity' Amid 450 Episodes (Exclusive)

NCIS Star Diona Reasonover Says Mark Harmon Still Comes To The Set & Loved The Script She Wrote For Tonight's Episode