
Warning: MAJOR SPOILERS for the NCIS episode “In Too Deep” are ahead!
NCIS has been airing on CBS for over 23 years, and as with any procedural, most of those episodes have followed the standard ‘case of the week’ model. But every now and then there’s an episode that really shakes things up. “In Too Deep,” which just finished airing on the 2026 TV schedule, did that and then some.