NCIS: Origins showrunners reveal if Mark Harmon will appear in future episodes following his cameo in the premiere.

Mark Harmon has opened up about casting Austin Stowell as the younger version of Leroy Jethro Gibbs in NCIS: Origins.

For over a decade Mark Harmon portrayed the role of Leroy Jethro Gibbs in the hit TV series NCIS. As producers and ...

It was just an unexpected surge of emotion for us both,' co-showrunner Gina Lucita Monreal says of seeing Harmon dressed as ...

Mark Harmon's colourful life and career explored. From his defining role as Leroy Jethro Gibbs in NCIS to his sweet love ...

Mark Harmon says there was “heavy competition” for the role he first created on 'NCIS' — until Austin Stowell walked into the ...

NCIS: ORIGINS premiered this week, and in honor of the show, stars Mark Harmon and Austin Stowell spoke to PEOPLE about their ...

Austin Stowell plays Leroy Jethro Gibbs, the beloved role created by Mark Harmon on 'NCIS', on CBS' new spin-off drama ...

Harmon, perhaps best known for playing Special Agent Leroy Jethro Gibbs on the CBS drama NCIS for nearly two decades, is ...

In the role of former NCIS lead Leroy Jethro Gibbs, Mark Harmon is a tough act to follow. But it seems he found a worthy ...

Mark Harmon was a staple of NCIS for two decades and now Agent Gibbs’ early career is going to be explored in NCIS Origins ...

NCIS: Origins has premiered on CBS, and Mark Harmon’s role in the first episode has been revealed. It was previously reported ...