NCIS is set to celebrate its 1,000th episode by joining forces with NCIS: Hawai'i and NCIS: Los Angeles for a special crossover event.

According to TVLine, NCIS: Los Angeles' Special Agent Kensi Blye-Deeks (Daniela Ruah) and NCIS: Hawai’i's Special Agent Jane Tennant (Vanessa Lachey) will appear in the hour-long episode, which will air on CBS on April 15.

However, it's been reported that they won't team up "in person" with the flagship show's DC-based team.

daniela ruah, ll cool j, ncis los angeles
CBS

Related: NCIS: Sydney gets impressive Rotten Tomatoes score

Spence Moore II will also star in the episode as Director Leon Vance's son.

Discussing the upcoming special with TVLine, NCIS co-showrunner David North said: "One of our own beloved characters is going to end up in grave danger, and you’re go to see all of the different franchises brought into this in a little bit of a different way."

Meanwhile, co-showrunner Steven D. Binder revealed that there will be "a personal storyline" that's set to "circle around Director Vance".

"We’re going to play plenty of homage to the past," North added, while Binder said they plan to scatter "some Easter eggs for long-time fans of the show".

vanessa lachey as jane tennant, ncis hawai'i
CBS Photo Archive//Getty Images

Related: NCIS star Sean Murray teases potential crossover in Tony and Ziva spinoff

The episode will mark Ruah's return as Kensi, with NCIS: Los Angeles having come to an end after 14 seasons last year.

However, the actress did recently step behind the camera to direct an episode of NCIS that will air this month, as well as an episode of NCIS: Hawai'i that will air in April.

"Kensi was born as a character on NCIS, 15 years ago, so now to be able to step onto that set again, as a director, with that incredible cast and crew, is an absolute honour," Ruah said. "So many familiar faces and people I love and they've welcomed me with open arms. It's like coming home."

NCIS airs on CBS in the US. Seasons 1-20 are streaming on Disney+ in the UK.

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Iona Rowan

Content Production Intern, Digital Spy

After completing her joint honours degree in Journalism and English Literature at Cardiff University, Iona joined Digital Spy as a Content Production Intern in 2022. In this role, Iona writes across both news and features, specialising in TV and movies. During her time at Digital Spy, she has interviewed multiple Love Island stars, reported from the Black Adam red carpet and, most recently, interviewed the cast of Disney’s live-action The Little Mermaid.