Origins' premiere sets up Leroy Jethro Gibbs' worst crime by reuniting him with his dad, Jackson. The newest installment in ...

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

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

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