Explained: Why Did Mark Harmon Leave NCIS? Could Leroy Gibbs Return To NCIS?
Leroy Jethro Gibbs, Mark Harmon’s Special Agent In Charge, quit NCIS for the following reason: Naval Criminal Investigative Service in “Great Wide Open,” episode 4… Read More »Explained: Why Did Mark Harmon Leave NCIS? Could Leroy Gibbs Return To NCIS?