NCIS star Mark Harmon releases a book touching on the beginnings of the real-life NCIS
Mark Harmon used to star as Leroy Jethro Gibbs on the hit drama NCIS. For 18 years, Mark was the team leader and face of the Naval Criminal Investigative Service on CBS. Several spin-offs popped up after NCIS became a hit, but Mark was still the face of the franchise. The fictional world of NCIS