Callen and Sam return for a 12th season of assignments, as the Naval Criminal Investigative Service encounter more and more threats. Chris O'Donnell and LL Cool J star.

NCIS is a procedural drama that follows a team of investigators in the U.S. Navy and Marine Corps. Here's where you can watch ...

Of course, you’ll want to make sure that you watch the shows in ... The series is still going, with Season 21 airing on ...

NCIS: Origins Season 1 Episode 12 reveals that you can't always trust the people around you when an agent betrays the team.

NCIS: Origins, the freshest spin-off of the NCIS series, is keeping fans on the edge of their seats as it dives into the ...

NCIS: Los Angeles surprised wrestling fans with a WWE icon cameo, also appearing in The Flash. Here are 5 underrated episodes ...

So far, the inaugural season ... watch ‘NCIS: Origins’ online in the U.S. The prequel series will also be available to stream live and on-demand for Paramount Plus with Showtime subscribers ($ ...

Eric Christian Olsen and boss tease big 'reveal' in two-part episode 'NCIS: LA' boss on the season finale and the explosion that could spell disaster for the team -- EXCLUSIVE PHOTO 'NCIS ...