Understanding all of Gibbs' rules in NCIS and what they mean is essential to knowing Leroy Jethro Gibbs. Mark Harmon played ...

Mark Harmon, who played the 'NCIS' lead Leroy Jethro Gibbs for 18 years, is returning for an appearance on ‘NCIS: Origins’ ...

The "NCIS" franchise is still going strong after 1,000 episodes across more than 20 years, and is gearing up for yet another ...

And how about his infamous rules? We know he created them through his life experiences ... “This really is the making of Leroy Jethro Gibbs. And even the most dedicated NCIS fans will discover that ...

Crazy or not Gibbs begins his career as a probie, a newly minted Special Agent mourning the loss of his wife Shannon and ...

Origins cast and character guide lists all the stars joining the new NCIS spinoff series based on a young Agent Gibbs.

The new series takes viewers back to 1991, introducing us to a young Leroy Jethro Gibbs, played by Austin Stowell, as he embarks on his career as a special agent with NCIS at Camp Pendleton.

CBS is rolling out a new NCIS spin-off this fall. NCIS: Origins will follow a young Leroy Jethro Gibbs and tell new stories about the character made famous by Mark Harmon. NCIS: Origins is set in ...

Did a young Leroy Jethro Gibbs join up with NIS too soon after the tragic deaths of his wife Shannon and their daughter Kelly? That valid question is at the fore of the first trailer for NCIS: ...

See Austin Stowell as Leroy Jethro Gibbs and Kyle Schmid as Mike Franks in the 'NCIS: Origins' series premiere.

The story begins. It’s 1991 Camp Pendleton, Calif. and Leroy Jethro Gibbs (Austin Stowell) has left the Marines to join the fledgling NIS in the series prequel NCIS: Origins. Off camera ...