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

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

Add Yahoo as a preferred source to see more of our stories on Google. Mark Harmon as Leroy Jethro Gibbs in a promotional photo for 'NCIS'; Mark Harmon at SiriusXM Studios on Sept. 22, 2014 For 18 ...

Origins" brought us the return of the older Gibbs -- and a new canine friend, which leads to one burning question.

Harmon was last seen onscreen as Gibbs on the prequel.

NCIS star Mark Harmon has become a household name in the world of entertainment for his resonating performance in the ...

Mark Harmon is returning to the NCISverse in a somewhat unexpected way. “Legends on legends on legends,” an Instagram post ...

Mark Harmon played Leroy Jethro Gibbs for years on "NCIS," and now Austin Stowell has taken on the role for "NCIS: Origins." ...

Mark Harmon and retired NCIS special agent Leon Carroll Jr. wrote a new book, "Ghosts of Sicily." They spoke to Fox News ...

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

Harmon left NCIS on good and peaceful terms. Fans remember his character wishing his teammates farewell while he decided to enjoy the quiet life. And Harmon felt it couldn’t have been a more fitting ...

Mark Harmon may have left NCIS, but he'll forever be synonymous with Supervisory Special Agent Leroy Jethro Gibbs. Harmon brought Gibbs to life for nearly two decades. The character first appeared on ...