Before NCIS, Mark Harmon played a womanizing sleazeball with an STD — on a show that only survived because NBC was desperate ...

Mark Harmon's wife, Pam Dawber, begged him not to take his role in the comedy-drama Summer School, but he proved her ...

The cast includes Downton Abbey’s Julian Ovenden, Oppenheimer’s James D’Arcy, and Shadow and Bone’s Amita Suman. With ...

Rumor has it NCIS star Mark Harmon used his clout to get creator Donald P. Bellisario fired because they were feuding, but ...

NCIS star Mark Harmon very nearly walked away from the show after season 4 due to a behind-the-scenes clash with one of his ...

Over the years, "NCIS" viewers have learned about dozens of the rules that Leroy Jethro Gibbs lives by. Here's a rundown of ...

Mark Harmon's son, Sean, portrayed a younger version of his father's "NCIS" character several times, so why didn't he reprise ...

Mark Harmon hinted at his NCIS exit two years before leaving, proving his departure was no surprise. Was it always the plan?

Recalling a story Carroll told last year about when Mark Harmon pranked him in the middle of shooting one of his earliest ...

However, despite his retirement, fans were surprised to see Harmon’s name remain in the NCIS opening credits for the rest of Season 19. While there was no official explanation from the network for ...

NCIS star Cote de Pablo found out about Mark Harmon's opinion of sick days the hard way, after a doctor told her to stay home ...

Mark Harmon played Leroy Jethro Gibbs for years on "NCIS," and now Austin Stowell has taken on the role for "NCIS: Origins." But how old is Gibbs in both shows?