Gibbs' emphasis on rules is one of the most defining qualities about him, and NCIS: Origins might have just revealed the beginning of one of his most ignored ones. So far in the NCIS spinoff ...

Harmon has had some great TV and movie roles outside of "NCIS," but for many people, he'll always be Gibbs first. Throughout ...

Leroy Jethro Gibbs, played by Mark Harmon, was the heart of NCIS for 19 seasons. He was known for his strict leadership, sharp instincts, and personal set of rules, but behind his tough exterior ...