10 'JAG' Stars Who Appeared on 'NCIS,' 'NCIS: LA' & 'NCIS: New Orleans' (PHOTOS)

Meredith Jacobs

Without JAG, we wouldn't have 16 seasons of NCIS, 10 seasons of NCIS: Los Angeles, and five seasons of NCIS: New Orleans.

JAG introduced its fans to the world of NCIS and Mark Harmon's Leroy Jethro Gibbs and his team through two episodes, "Ice Queen" and "Meltdown," in Season 8.

11 Former 'NCIS' Franchise Stars We Want to See Return (PHOTOS)

11 Former 'NCIS' Franchise Stars We Want to See Return (PHOTOS)

Many of these stars of 'NCIS,' 'NCIS: LA' and 'NCIS: New Orleans' left with open-ended story lines.

Since then, some of the actors from the original series have appeared on the spinoff and its spinoffs, NCIS: LA and NCIS: New Orleans. Sometimes they've reprised their original roles. Other times, they've played new characters, even though all four shows share a universe.

And now, David James Elliott (Harmon Rabb Jr.) and Catherine Bell (Sarah "Mac" MacKenzie) will be reprising their JAG roles on NCIS: Los Angeles in the final two episodes of Season 10.

Is 'NCIS: LA' Setting Up Season 10 to Be Its Last?

Is 'NCIS: LA' Setting Up Season 10 to Be Its Last?

The March 31 episode had fans buzzing that this could be the CBS series' final run.

Click through the gallery above to see the other JAG actors who have appeared on one of the NCIS shows.