JAG ended its run in 2005 just as NCIS was taking off as a hit. For a long while, NCIS basically ignored its parent series until NCIS: Los Angeles brought back Harm and Mac for a storyline in season ...

Still, some of the actors, notably David James Elliott and Catherine Bell, appeared during earlier seasons of both NCIS and ...

Will JAG ever get rebooted? Star David James Elliott says it's unlikely but not impossible because the show’s creator, ...

NCIS is a global TV franchise, but what about the predecessor that made it all possible? JAG, the military legal drama from which NCIS spun off, marked the 20th anniversary ...

Like NCIS, JAG is a drama set in the world of the U.S. Navy. It focuses on judge advocates, or military lawyers, as they work on various criminal cases.

So who knows." The characters of NCIS were first introduced in two episodes of JAG: Season 8, Episodes 20 and 21, "Ice Queen" and "Meltdown" in a backdoor pilot.

Two episodes of JAG in 2003 introduced Mark Harmon’s Leroy Jethro Gibbs, setting him up to lead the story of NCIS. After NCIS premiered, JAG ran for two more seasons before concluding its run.

NCIS executive producer Mark Horowitz talked about how the procedural was originally pitched and the lengths taken to distinguish it from parent series JAG.

JAG was the springboard for it,” JAG creator and NCIS co-creator Donald P. Bellisario explained to The Hollywood Reporter for a recent oral history of the latter show.

Meanwhile, NCIS Season 22 will premiere Monday, October 14 on CBS. That same night on the 2024 TV schedule will also have the Gibbs-focused prequel NCIS: Origins.