This one-hour Entertainment Tonight special, celebrating 1,000 episodes of the "NCIS" franchise, includes exclusive interviews with the stars of NCIS, NCIS: Los Angeles, NCIS: New Orleans, NCIS: Hawai'i, and NCIS: Sydney. The cast and guest stars share favorite memories and behind-the-scenes moments from 20 years' worth of never-before-seen interviews from the ET vault.

ET's Kevin Frazier hosts from the NCIS studio lot, where CBS Studios has filmed and produced the flagship show for two decades. Also included is a rare look inside with the cast and crews to produce TV's #1 primetime drama franchise. The special reveals new details about the origins of NCIS, including how the multi-show, global phenomenon was created and changed the face of the real NCIS.

Additionally, fans will get a behind-the-scenes look at the making of the franchise's 1,000th episode, an episode of NCIS airing April 15, 2024, on the CBS Television Network.