After almost 20 seasons, Leroy Jethro Gibbs left NCIS. Mark Harmon may have left the show, but this isn't the end for Gibbs.

Mark Harmon holds Jethro Gibbs close ... Austin Stowell will portray a young Gibbs - a role once by Harmon's son, Sean Harmon, on seven episodes of "NCIS." For the prequel, Sean serves as an ...

Mark Harmon's son, Sean Harmon, seemed like an obvious choice to play young Leroy Jethro Gibbs in NCIS: Origins, but they ...

When NCIS needed someone to portray a young Leroy Jethro Gibbs, the show’s team didn’t need to look far to find the right person. Sean Harmon – the son of Gibbs actor Mark Harmon ...

Sean Harmon initially laid the groundwork for ‘NCIS Origins’, a series that will explore a much younger, troubled Leroy Jethro Gibbs. “I believe that very few people are actually ‘born ...

If you're among those curious why Sean didn't return, this is why Mark Harmon's son doesn't play young Gibbs on "NCIS: Origins." Read more: Messed Up Ways Main Characters Were Killed Off While ...

The happy and relaxed photo is worlds away from Gibbs' life, which is explored in the new prequel. Recommended videoYou may also likeVIDEO: Mark Harmon stars in NCIS: Origins Recently in an ...

The Mark Harmon from 'NCIS' is virtually unrecognizable as a dimwitted high school teacher in 'Summer School.' ...

Mark Harmon holds Jethro Gibbs close ... Austin Stowell will portray a young Gibbs — a role once by Harmon’s son, Sean Harmon, on seven episodes of “NCIS.” For the prequel, Sean serves ...