When does Y: Marshals come out? What we know about the Yellowstone spinoff — and Kayce Dutton's n...

Luke Grimes will reprise his role as John Dutton's youngest son on the upcoming CBS series. When does Y: Marshals come out? What we know about the Yellowstone s

Luke Grimes will reprise his role as John Dutton's youngest son on the upcoming CBS series.

When does Y: Marshals come out? What we know about the Yellowstone spinoff — and Kayce Dutton's new career

Luke Grimes will reprise his role as John Dutton's youngest son on the upcoming CBS series.

By Randall Colburn

Randall Colburn

Randall Colburn is a former editor at **. He left EW in 2023.

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Published on August 17, 2025 10:00AM EDT

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Luke Grimes as Kayce Dutton on 'Y: Marshals'. Credit:

Paramount Network

- *Y: Marshals *is an upcoming *Yellowstone* spinoff series following Luke Grimes' Kayce Dutton as he embarks on a new career as a U.S. marshal.

- Logan Marshall-Green (*And Just Like That*) will lead the procedural drama alongside Grimes.

- The series is slated to premiere midway through CBS's 2025-2026 broadcast season.

Kevin Costner's John Dutton may have moseyed on into the sunset. But the *Yellowstone* patriarch's spirit still lingers over the series' various spinoffs, one of which is mere months away from debuting.

The upcoming *Y: Marshals *— no relation to *Y: The Last Man *— will center on Luke Grimes' Kayce Dutton, John's youngest son. *Yellowstone'*s fifth and final season ended with Kayce selling off a large portion of the ranch. And, as its title implies, the spinoff will see him stepping into a new career as a U.S. marshal.

*Yellowstone* creator Taylor Sheridan will serve as executive producer, as will *SEAL Team* veteran Spencer Hudnut, who will take the reins as showrunner.

So, when is* Y: Marshals* premiering? And who's in the cast? Read on as we answer these questions and more.**

What is Y: Marshals about?

Luke Grimes as Kayce Dutton on 'Yellowstone'.

Paramount Network

According to the show's official logline, *Y: Marshals* will find Kayce Dutton joining "an elite unit of U.S. Marshals, combining his skills as a cowboy and Navy SEAL to bring range justice to Montana, where he and his teammates must balance family, duty and the high psychological cost that comes with serving as the last line of defense in the region's war on violence."**

The 10 best 'Yellowstone' episodes

'Yellowstone' finale review: Taylor Sheridan offers a bloated (maybe) goodbye

Is it *really *called Y: Marshals?

It could be, but Paramount has made it clear that *Y: Marshals* is a working title.

Who's in the cast of Y: Marshals?

Kelsey Asbille as Monica Long and Luke Grimes as Kayce Dutton on 'Yellowstone'.

Paramount Network

Paramount has yet to reveal the full cast of *Y: Marshals*, but with Grimes leading the series as Kayce, it's likely we'll also see his wife, Monica, as played by Kelsey Asbille.

While that remains to be seen, ** confirmed in August that Logan Marshall-Green would join the cast alongside Grimes. The actor will play Pete Calvin, a military veteran whom Kayce befriended during his time in the Navy SEALs.

Logan Marshall-Green at the 2023 Tribeca Festival in New York City.

Theo Wargo/Getty

Marshall-Green has been acting onscreen for more than two decades now, with early turns in films like *The Invitation* (2015) and *Upgrade* (2018) giving way to leading roles on series such as *Big Sky* (2021–2022) and *And Just Like That* (2025). Next up for Marshall-Green is a supporting role in Christopher Nolan's *The Odyssey*.**

How many episodes will there be of Y: Marshals?

*Y: Marshals* was given a 13-episode run by CBS.**

Is there a Y: Marshals release date?

Luke Grimes as Kayce Dutton and Kelly Reilly as Beth Dutton on 'Yellowstone'.

Paramount Network

*Y: Marshals* will premiere midway through CBS's 2025-2026 broadcast season. As of now, episodes are slated to air on Sunday nights at 9 p.m. ET.**

***Sign up for **'s free daily newsletter* *to get breaking news, exclusive first looks, recaps, reviews, interviews with your favorite stars, and more.*****

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