NBC isn’t leaving “Las Vegas” any time soon — but James Caan and Nikki Cox are.

Peacock has picked up the slots-and-sex sudser for a fifth season. But shortly after the net’s announcement, word leaked out that Caan and Cox — two original denizens of “Vegas” — have opted not to return.

Caan, who’s appeared in 76 features and snagged an Oscar nom, said he wanted to get back to films.

“I’ve had a wonderful four years, worked with great people and made friends for life working on ‘Las Vegas,'” he said. “But I’m eager to return to where my heart is, which is film, and due to the show’s schedule, I’ve missed some great opportunities to do that.”

Season-to-date, “Las Vegas” is averaging a 2.8/8 in adults 18-49 and about 9 million viewers. Nonetheless, skein regularly wins its 9 p.m. timeslot opposite weak competish.

Because NBC has an ownership stake in “Las Vegas,” company has an incentive to ensure that the skein amasses the 100 episodes usually preferred for syndication. Only 17 episodes are being produced this season; the Peacock didn’t say how may it will produce next season.

Gary Scott Thompson created and exec produces “Las Vegas,” along with Gardner Stern, Justin Falvey, Darryl Frank, Matt Pyken and Kim Newton. Skein comes from NBC U TV Studio and DreamWorks Television.