When a series has been airing for as long as NCIS — i.e. since 2003 — even some of the most dedicated fans could be forgiven for missing an episode, or even a season. Having most of the show available on demand via Netflix means you can start from the beginning, rewatch favorites, or leave it running in the background until the platform checks in to make sure you're still watching. Once you've finished season 15 (the season on which we learned Pauley Perrette is leaving NCIS), however, you'll have to go back to the beginning, accept your NCIS-less existence, or find an alternative method of watching. As of this writing, neither season 16, which aired from 2018 to 2019, nor season 17, which wrapped up in April 2020, are on Netflix. Here's why we may not see the streaming giant update with season 16 and 17 of NCIS, and where you can watch them, instead. NCIS seasons 16 and 17 may never arrive on Netflix Wilmer Valderrama as Special Agent Nicholas Torres, Mark Harmon as Sp...