Watch NCIS Season 12 Episode 24 Online. Best and Free Online streaming for NCIS TV Show. We picked the best sites to stream s12e24. Simply pick a site below and click "Watch Now!" button next to it. Some of the links may be broken, please upvote the working and good links so other users see those links for NCIS Season 12 Episode 24 s12e24 at the top of the list.