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 ...

Mark Harmon left the series in season 19, but his character's life advice lives on years later Leroy Jethro Gibbs (Mark Harmon) lived by his rules on NCIS. For 19 seasons, Gibbs spouted his guidance ...

Fans know Gibbs has a rule for everything. And so it’s only fitting that in this NCIS and NCIS: Origins crossover, we’ll see young Leroy Jethro Gibbs (Austin Stowell) learning one. “You often hear ...

NCIS: Origins continues to move forward through the canon we know about Gibbs ( Austin Stowell ), with Diane ( Kathleen Kenny ...

In NCIS: Origins Season 2 episode 8, we learn that Gibbs ends up marrying Diane Sterling during a fast, impulsive trip to Las ...

Fans know Gibbs has a rule for everything. And so it’s only fitting that in this NCIS and NCIS: Origins crossover, we’ll see young Leroy Jethro Gibbs (Austin Stowell) learning one. “You often hear ...

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 the ...

NCIS: Origins co-creator David J. North has revealed that Mark Harmon does not recall a key detail long associated with the character. Despite portraying Leroy Jethro Gibbs for nearly two decades, the ...

Lenny Burnham grew up in Missoula, Montana. From an early age, he was obsessed with TV and loved creating websites and participating in fan forums for Buffy the Vampire Slayer. He attended New York ...

"NCIS" legend Mark Harmon is bringing his OG Leroy Jethro Gibbs character to the prequel series "NCIS: Origins," and he's not coming alone. Harmon, 74, will make a rare guest appearance on "Origins" ...