Mark Harmon Writes Book Based On How Real NCIS Agency Came To Be; Will Debut In November

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)