The CBS military legal drama JAG aired two episodes in 2003 that acted as a backdoor pilot for a spin-off series, and now, 20 years later, NCIS is one of the most popular scripted dramas worldwide. It focuses on military-related criminal investigations and has had three successful spin-off series. NCIS season 21, which is facing a delay, is expected to feature much of the main cast from the previous two seasons and explore their history and relationships.

The latest news revealed the passing of actor David McCallum, who played Ducky since the show's inception in 2003. Despite the delay, CBS has confirmed the renewal of NCIS season 21. There is currently no release date, but it is anticipated to be in the 2024-2025 TV season. NCIS season 21 will be available to watch on CBS and Paramount+. The cast is expected to remain intact, with the exception of David McCallum. The crew is expected to be consistent with previous seasons, and the storylines will likely continue the character development from the previous season.