Fans are going wild! 😱 After years off-screen, Mark Harmon makes his epic return as Gibbs in a mind-blowing ‘NCIS: Origins’ crossover this Veterans Day. 💥 The NCIS Universe comes together for a once-in-a-lifetime event packed with secrets, nostalgia, and the comeback nobody saw coming. 🔥 This is the reunion fans have been dreaming of — and it’s finally happening!

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Jessica Knight (Katrina Law) looking concerned with something in NCIS.

The iconic NCIS series has added two more seasons of its long-running story to Netflix, meaning that 19 seasons of the show are now available. One of the quintessential police procedurals of the 21st century, NCIS follows a team of special agents of the Naval Criminal Investigative Service tasked with responding to high-visibility crimes.

Since it first premiered in 2023, NCIS has produced a new season of the series nearly every year, save for 2023. The show has seen some major cast overhauls in recent years, but has still managed to keep viewers and garner critical acclaim. The best seasons of NCIS aren’t necessarily from the start of the show.

The longest-running scripted primetime television series to ever air on CBS, NCIS has retained its crown as one of TV’s premier shows by always adhering to the conceits it was founded on. It’s a show filled with strong, though unflashy performances, and smart crimes. Now Netflix faithfuls have two more seasons to enjoy.

Seasons 18 And 19 Of NCIS Are Now Available To Stream On Netflix

Ellie Wickersham as Ellie Bishop in NCIS season 18 rule 91 standing next to another agent.

NCIS seasons 18 and 19 dropped on Netflix on October 1, 2025, adding 37 new episodes to the streamer’s library. NCIS isn’t exactly hard to find, with episodes available on Paramount+, Hulu, YouTubeTV, and more, but it’s only available in its entirety with Paramount+, as Paramount owns CBS, which airs NCIS.

While the entire show isn’t available on the streamer, 19 seasons is a significant portion, and you can expect more seasons to come on the streamer eventually.

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After Paramount+, only Netflix has more than 10 seasons available, so if you want to watch the series but are unwilling to subscribe to Paramount+, Netflix is your best bet. While the entire show isn’t available on the streamer, 19 seasons is a significant portion, and you can expect more seasons to come on the streamer eventually.

NCIS Seasons 18 & 19 Feature Some Major Cast Lineup Changes

Agent Parker (Gary Cole) talks to Gibbs (Mark Harmon) while standing on a dock by a large lake in NCIS

NCIS seasons 18 and 19 are probably most notable for the major cast changes that happened late in the series. In season 18, the second-shortest season of the show after season 21, Jack Sloane (Maria Bello) and Ellie Bishop (Emily Wickersham) departed the series after 4 and 8 seasons, respectively.

Season 19 saw even bigger cast changes. This is the final season with Mark Harmon as Leroy Jethro Gibbs, the lead of the series from the beginning. This season allows Gibbs to finally apprehend the serial killer he’s been after for years, while also giving him graceful goodbyes to the rest of the cast.

In his place comes Katrina Law as Jessica Knight and Gary Cole as Alden Parker, who both go on to become the new leaders of the NCIS team, signaling a new era of NCIS. The entire show may not be available on Netflix, but with 19 seasons, fans should have plenty to keep them satiated.