Gibbs had plenty of rules during his time on NCIS, but only one of them is Mark Harmon's favorite — find out which rule he ...

He immediately answered the question.

Mark Harmon played Leroy Jethro Gibbs for 19 seasons on 'NCIS.' The CBS franchise announced Mark will be a guest on the 'NCIS ...

Mark Harmon reveals how his friendship with retired NCIS agent Leon Carroll Jr. shaped his portrayal of Gibbs and led to ...

Meet the stars of NCIS and its many spin-offs families – their partners and children ...

Harmon was last seen onscreen as Gibbs on the prequel.

Mark Harmon is shedding a little light on going from being the lead on NCIS to working more behind the scenes on NCIS: ...

NCIS actor Mark Harmon's sister, Kristin Harmon, died on April 27 at the age of 72 NCIS actor Mark Harmon’s sister, Kristin Harmon, died on April 27 at the age of 72 — and her life was anything but ...

NCIS actor Mark Harmon shares two sons with his actress wife of nearly 40 years, Pam Dawber – including one son who played a younger version of him in NCIS ...

Former NCIS star Mark Harmon recently reflected on the beginnings of the show and his late friend and co-star David McCallum.

Mark Harmon reflected on his early Hollywood career and how he got started in acting ...

Although now synonymous with NCIS, Mark Harmon's path into acting wasn't exactly straightforward. During a recent appearance on The Fifth Column podcast, the 74-year-old reflected on the unexpected ...