The twenty-third season of NCIS was announced on February 20, 2025 by CBS and premiered on October 14, 2025. In January 2026, the series was renewed for a 24th season. This season also includes the series' 500th episode.
This is the final season to feature Rocky Carroll as Leon Vance.
NCIS revolves around a fictional team of special agents from the Naval Criminal Investigative Service, which conducts criminal investigations involving the United States Navy and Marine Corps. Based at the Washington Navy Yard in Washington, D.C., the NCIS team is led by Supervisory Special Agent Alden Parker, an ex-FBI Special Agent and a skilled investigator.
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After the season renewal, CBS revealed that the series would be returning to its original timeslot (held from seasons 1 to 18) on Tuesdays at 8pm, followed by ' and ' at 9 and 10 p.m. respectively.
On September 4, it was announced a special crossover with the Origins spinoff celebrating U.S. Veterans on November 11, with a case that would span across decades. For this event, both series inverted their programming schedule. Also, Mark Harmon, Roma Maffia and Muse Watson reprised their roles as Leroy Jethro Gibbs, Vera Strickland and Mike Franks for the crossover.
This is the final season to feature Rocky Carroll as NCIS Director Leon Vance after 18 years, as Carroll departed the series after this season's 13th episode, although he'll continue to work as the series' director.