Why is NCIS still going strong after 21 years? We have a few ideas. Find out if we've captured what makes show special.

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

NCIS: Origins isn't just exploring Gibbs when he was younger — the prequel also features Mark Harmon reprising his role as ...

NCIS: Origins explores the backstory of young Leroy Jethro Gibbs, who will be played by Austin Stowell. Will Mark Harmon, who ...

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 ...

Finding an actor to play the younger version of Leroy Jethro Gibbs was the supreme "NCIS: Origins" challenge. Mark Harmon embodied the character for 19 seasons of the original "NCIS," America's ...

Amell revealed that he tried out for the role of a younger Leroy Jethro Gibbs character in NCIS: Origins just days before he auditioned for his Suits: L.A. character Ted Black, a former federal ...

Finding an actor to play the younger version of Leroy Jethro Gibbs was the supreme "NCIS: Origins" challenge. Mark Harmon embodied the character for 19 seasons of the original "NCIS," America's ...

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, so it’s not clear who ...