Mark Harmon reveals how his friendship with retired NCIS agent Leon Carroll Jr. shaped his portrayal of Gibbs and led to their new book, "Ghost of Sicily." ...

It's a show that just won't die.

Mark Harmon's Leroy Jethro Gibbs leads a team investigating various military-related crimes. When it debuted, that team included brilliant forensic scientist Abby (Pauley Perrette), cocksure senior ...

Mark Harmon played Supervisory Special Agent Leroy Jethro Gibbs for 18 seasons Mark Harmon may have left NCIS, but he'll forever be synonymous with Supervisory Special Agent Leroy Jethro Gibbs. Harmon ...

Four years after leaving the “NCIS” franchise, Mark Harmon is reprising his role as Leroy Jethro Gibbs on an upcoming episode of “NCIS: Origins.” Harmon provides narration for “NCIS: Origins,” which ...

Mark Harmon returns to NCIS: Origins to reprise his role as Leroy Jethro Gibbs, the iconic TV character he played for 18 seasons on NCIS, when the two series team up for a special crossover event ...

Mark Harmon is shedding a little light on going from being the lead on NCIS to working more behind the scenes on NCIS: Origins — and the Gibbs of it all. In Us Weekly’s exclusive sneak peek at the ...

Mark Harmon, Pauley Perrette and Michael Weatherly are part of 'NCIS' history Catherine Santino is a Style Writer-Reporter at PEOPLE. She began contributing to PEOPLE in 2022 and joined the staff full ...

Murray also worked with both prior to the long-running CBS drama.

NCIS has been a huge hit over the years and has introduced many beloved characters – which makes their departure even more difficult for fans of the show to deal with. In the last several years the ...

Mark Harmon spent years chasing criminals on "NCIS"— but it was an off-screen encounter with a real agent that truly cracked open a turning point in his career. The actor first met retired NCIS ...