Leroy Gibbs follows his own code of conduct in NCIS. He has a list of rules that he picks up throughout the years, and they can be traced all the way back to his first wife, Shannon Gibbs, who died in ...

NCIS’ Gibbs prequel series NCIS: Origins has been taking fans back to the ‘90s pre-NCIS to follow a young Leroy Jethro Gibbs, played by Austin Stowell. The show, which is now airing amid the 2025 TV ...

When NCIS premiered in September 2003 with "Yankee White," which still stands as one of the best episodes over the series' long-run, one of the first things we learned about Mark Harmon's Leroy Jethro ...

For years, fans of NCIS knew exactly who Leroy Jethro Gibbs was: a man of few words, a hardened leader with a strict moral code, and the creator of a legendary set of rules. But now, with NCIS: ...

Mark Harmon may need to remember Rule 6: Never say you're sorry. It's a sign of weakness. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. One of ...