Back in February, CBS confirmed that NCIS would be back for Season 21 during the 2023-2024 television season.
While there is no release date yet, CBS confirmed that the show will keep its Monday night slot at 9 p.m. ET, with NCIS: Hawaii following with new Season 3 episodes at 10 p.m. ET.
We also know which main cast members have renewed their contracts, and which one is taking on a significantly reduced role.

Sean Murray as Special Agent Timothy McGee – RETURNING

Wilmer Valderrama as Special Agent Nick Torres – RETURNING

Katrina Law as Special Agent Jessica Knight – RETURNING

Gary Cole as Supervisory Special Agent Alden Parker – RETURNING

Brian Dietzen as Chief Medical Examiner Dr. Jimmy Palmer – RETURNING

Diona Reasonover as Forensic Specialist Kasie Hines – RETURNING

Rocky Carroll as NCIS Director Leon Vance – RETURNING

David McCallum as NCIS Historian and former Chief Medical Examiner Dr. Donald “Ducky” Mallard – REDUCED ROLE
“I am delighted to say that I have reached an agreement with CBS for Dr. Donald Mallard to stay with NCIS for Season 16. Once again it will be a limited schedule. That arrangement will allow me to spend time with Katherine, our children, six grandsons, and Nickie,” the 89-year-old actor wrote to fans.
The cast of NCIS: Sydney has officially been announced!