Some of Gibbs' most memorable NCIS rules work surprisingly well off the job, too. These five offer genuinely useful advice worth keeping in mind.

Plus, how does Tony get along with the rest of the team?

Add Yahoo as a preferred source to see more of our stories on Google. Throughout his run in the "NCIS" franchise, Special Agent Leroy Jethro Gibbs (Mark Harmon) has followed a code — a set of rules, ...

Leroy Jethro Gibbs was practically a Boy Scout, so it makes sense that his "NCIS" portrayer Mark Harmon lives by the motto: Be prepared. Harmon, who played Gibbs on the CBS procedural for 19 seasons, ...

Mark Harmon and Michael Weatherly will share the screen again in the October 20 episode.

Mark Harmon admitted he uses one of Gibbs' rules in his everyday life, but before anyone goes wild thinking about which ones would possibly factor into his real life, it's #9. During what I assumed ...

NCIS: Origins season 3 episode 2, titled My Own Worst Enemy, links Leroy Jethro Gibbs' past to the mystery now unfolding in ...

Rachel LaBonte is an entertainment writer and Rotten Tomatoes–approved critic specializing in film and television. She previously served as a Senior Writer and Editor on Screen Rant’s Core News Team, ...