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.