From St Elsewhere to Chicago Hope, and most famously as Leroy Jethro Gibbs on NCIS, audiences have been watching Mark Harmon ...

EXCLUSIVE: CBS’ NCIS: Origins is heading to the ’90s with the return of Mark Harmon as Leroy Jethro Gibbs for a season-long ...

CBS gave fans their first real look this week at just how big Mark Harmon's Season 3 return to NCIS: ORIGINS will be. The ...

Five years after he left NCIS, Mark Harmon returns as Leroy Jethro Gibbs for a special season-long, 10-episode arc on prequel ...

With Harmon back in the fold in front of the camera, there's already a lot to look forward to in NCIS: Origins Season 3. We ...

Mark Harmon is returning as Leroy Jethro Gibbs in NCIS: Origins Season 3, which threatens to bring the Special ...

Origins Season 3. Seasoned fans were delighted to learn that Harmon will finally be returning as Leroy Jethro Gibbs in the ...

Never let it be said that Donald Bellisario was incapable of changing his mind — his original vision for Gibbs was quite a ...

NCIS creator Don Bellisario nearly passed over Mark Harmon for the role of Leroy Jethro Gibbs, the gruff former Marine ...

Mark Harmon will take on a significantly larger on-screen role in Season 3 of NCIS: Origins, reprising Leroy Jethro Gibbs ...

'He created the DNA of how our show was going to run,' said Brian Dietzen.