Mark Harmon in NCIS

NCIS season 19: everything we know so far

Returning and exiting stars, airdate, plot and more

Eve Crosbie

Series 18 of NCIS ended on a cliffhanger like no other, and we're already counting down the days until we can check back in with our favourite special agents!

MORE: 5 shows to watch if you can't get enough of NCIS

But when can we expect more episodes of the addictive drama and who's going to be in the cast? We've done some digging and here's everything we know so far about the next season of NCIS...

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WATCH: NCIS star Mark Harmon opens up about his favourite memories on set

What will happen in season 19 of NCIS?

The plot of season 19 remains firmly under wraps for now, although producer and showrunner Steven D. Binder has teased while the team haven't "shot a single frame quite yet," it is already "shaping up to be one of the best seasons yet." 

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Season 19 is "shaping up to be one of the best seasons yet"

Speaking to Deadline, he added: "Going into season 19, we are excited to have new characters and stories to tell that adds to and reenergizes the world we've come to love over the 400+ episodes."

MORE: NCIS stars' children: Mark Harmon, LL Cool J, Wilmer Valderrama and more

MORE: Where are the stars who left NCIS now?

Who will star in season 19 of NCIS?

Viewers can expect something of a shakeup when the show returns. While long-running stars Maria Bello and Emily Wickersham bowed out in the last season, two new faces are set to join the cast.

The Good Fight and Chicago Fire actor Gary Cole and Hawaii Five-0's Katrina Law have been named as series regulars. While details about Gary's character, Special Agent Park, are not being released, Katrina was introduced as REACT agent Jessica Knight in the penultimate episode of season 18.

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Questions remain about Mark Harmon's involvement in season 19

A question remains about how much involvement Mark Harmon will have in the new series. Having appeared in every single episode of the show since 2003, the 69-year-old actor is one of the longest-serving American TV stars - and is reportedly hoping to take a step back. Insiders close to the CBS drama report that he will only make a few appearances throughout the season, although this has not yet been confirmed.

However, fans can rest easy knowing that Wilmer Valderrama, Sean Murray, Brian Dietzen, Rocky Carroll and Diona Reasonover are all set to reprise their roles on the new season.

MORE: Take a look back at NCIS star Mark Harmon's early career – he looks so different!

When will season 19 of NCIS air?

CBS have confirmed that season 19 will start airing from Monday 20 September! It will air at 9pm and lead into new spin-off series NCIS: Hawai'i, which will air weekly at 10pm. Long-time viewers might want to mark that in their diaries as for the last 18 years, the show has been holding down the network's 8pm Tuesday slot.

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