Over the years, "NCIS" viewers have learned about dozens of the rules that Leroy Jethro Gibbs lives by. Here's a rundown of ...

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 ...

And so when Austin Stowell, who plays the young Gibbs, came into TV Insider’s office during the first half of the season, we had to find out whether some of those rules more so apply to him or ...

NCIS Origins will delve into the backstory of veteran Agent Leroy Gibbs when he first joined Camp Pendleton in the 1990s.

NCIS Origins is on the way to the UK, giving fans an insight into the early days of Agent Leroy Jethro Gibbs' career.

Austin Stowell plays Leroy Jethro Gibbs on the NCIS: Origins cast. Pic credit: Erik Voake/CBS The first season of NCIS: Origins is doing well on Monday nights. A prequel series, NCIS: Origins ...