‘NCIS’ Hits Massive 500-Episode Milestone With a Can't-Miss Release at 8 PM Tonight

There's cause for celebration for CBS and the agents at the Washington Navy Yard. After nearly 23 years on-air, NCIS is about to reach a milestone few television series can even dream of — 500 episodes. Beginning as a spin-off of JAG in 2003, Donald P. Bellisario and Don McGill's flagship series has grown far beyond its origins, spurring six spin-offs of its own, cycling through many fan-favorite cast members like Mark Harmon, Michael Weatherly, and Cote de Pablo, and remaining a beloved mainstay of the network across multiple decades at this point. Longtime fans will want to tune in tonight, March 24, at 8 p.m. ET/PT, to catch the landmark moment live and experience a 500th episode filled with a few franchise Easter eggs for avid viewers.