When Is The New Season Of Ncis 2024 Start. The debut episode of ncis season 21 (entitled “algún día”) will air on cbs on thursday, february 12 at 9:00 p.m. A new era is beginning for ncis as the series returns to the small screen with a new cast of actors and characters for 2024's season 21.

Stay tuned to collider for further updates. Crime procedural ncis is set to return for its 21st season this week, finally giving fans new episodes to sink their teeth into after the cliffhanger that was the season.