NCIS: Los Angeles is likely finished for good after this Chris O'Donnell update. The NCIS: Los Angeles actor is joining a new procedural as its main lead, which has essentially removed all hope for any possible NCIS: Los Angeles reunion. The NCIS spinoff aired for 14 years on CBS before being canceled in 2023. CBS' decision to cancel NCIS: Los Angeles was surprising, but there was always hope that the characters might return.