beloved wife

This story contains spoilers for the pilot of “Marshals.”

When the curtain came down on “Yellowstone” last year, Kayce Dutton had finally found his happily-ever-after.

The youngest son of wealthy rancher John Dutton (Kevin Costner) had secured a modest cabin in a mountainous region where he could reside in secluded peace with his beloved wife, Monica (Kelsey Asbille), and son, Tate (Brecken Merrill), far from the turbulent dysfunction of his family.

“Kayce found his little peace of heaven, getting everything he ever wanted and fought for,” said Luke Grimes, who plays the soft-spoken Dutton in “Yellowstone.”

Grimes reprises the role in CBS’ “Marshals,” which premiered Sunday. But in the new series, Kayce’s serenity has been brutally shattered, forcing him to find a new path forward after an unimaginable tragedy.

The drama is the first of several planned spinoffs of “Yellowstone,” which became TV’s hottest scripted series during its five-season run. And while some familiar faces return and events unfold against the magnificent backdrop of towering mountains and lush greenery, “Marshals” is definitely not “Yellowstone” 2.0.

Luke Grimes as Kayce Dutton in “Marshals,” which combines the gritty Western flavor of “Yellowstone” with the procedural genre.

(Sonja Flemming / CBS )

In “Marshals,” Kayce joins an elite squad of U.S. Marshals headed by his Navy SEAL teammate Pete Calvin (Logan Marshall-Green). The drama combines two distinct brands — the gritty Western flavor of “Yellowstone” with the procedural genre, a flagship of CBS’ prime-time slate.

During an interview at an exclusive club in downtown Los Angeles, Grimes expressed excitement about dusting off his cowboy hat and boots, though he admitted to having initial concerns about whether the project was a fit.

“I had never watched a procedural before, so I had to do some homework on what that was,” Grimes said hours before the gala premiere of “Marshals” at the Autry Museum of the American West in Griffith Park. “And I just couldn’t wrap my head around it at first. In the finale, Kayce had ridden off into the sunset. So I thought, ‘Let him be, let him go.’ ”

Those doubts eventually ebbed away.

“To be honest, there was a part of me that didn’t want to let Kayce go just yet,” Grimes said. “Saying goodbye to him was really hard, so the opportunity to keep this going was something I couldn’t pass up. We get to show his backstory and also this other side of him that we didn’t see in ‘Yellowstone.’ ”

But this Kayce is a man in crisis. “Yellowstone” devotees will likely be shocked by the “elephant in the room” — the revelation in the pilot episode that Monica has died of cancer. The couple’s sexy and loving chemistry was a key element in the series while also establishing Grimes as a heartthrob.

“I think fans will be upset — and they should be,” Grimes said as he looked downward. “Kayce is very upset. It’s the worst thing that could have happened to him. But as much as I’m really upset not to work with Kelsey, it’s a good idea for the show.”

He added, “His dream life is no longer available to him. Now the only thing he has is his son, who is not so sure he wants the same life as Kayce. A big part of the season is Kayce learning how to manage all these new things — new job, being a single father.”

“His dream life is no longer available to him. Now the only thing he has is his son, who is not so sure he wants the same life as Kayce,” said Luke Grimes about his character Kayce.

(Jay L. Clendenin / For The Times)

Executive producer and showrunner Spencer Hudnut (CBS’ “SEAL Team”) acknowledged in a separate interview that viewers may be stunned by the tragedy. “Real life intervenes for Kayce. Unfortunately it happens to so many of us.”

But he stressed that although Monica is physically gone, her presence will be heavily felt this season.

“She is guiding Kayce, and their relationship is moving forward,” Hudnut said. “His dealing with his inability to confront his grief is a big part of the season. It became clear that something horrible had to happen to put Kayce on a different path.”

As the development evolved, Grimes embraced the procedural concept: “This is a very different show and structure. This is an action show, very fast paced. I meet a lot of fans who say they really want to see Kayce go full Navy SEAL.”

Alumni from “Yellowstone” returning in “Marshals” include Gil Birmingham as tribal Chairman Thomas Rainwater and Mo Brings Plenty as his confidante Mo.

“Yellowstone” co-creator Taylor Sheridan, who had already spearheaded the prequels “1883” and “1923,” will further expand the “Yellowstone” universe later this month with “The Madison,” starring Michelle Pfeiffer and Kurt Russell, about a New York City family living in Montana’s Madison River territory. Later this year, Kelly Reilly and Cole Hauser will star in “Dutton Ranch,” reprising their respective “Yellowstone” roles as John Dutton’s volcanic daughter Beth Dutton and her husband, boss ranch hand Rip Wheeler.

Hudnut said fans of “Yellowstone” will recognize themes that were central to that series: “The cost and consequences of violence, man versus nature, man versus man.”

“We’re trying to tap into what people loved about ‘Yellowstone’ but to tell the story in a different framework,” he said. “The procedural brand is obviously very successful for CBS. And nothing has been bigger than ‘Yellowstone.’ So the challenge is, how do you marry those things?”

Taking on the lead role prompted Grimes to reflect on how “Yellowstone” transformed his life after co-starring roles in films like “American Sniper” and “Fifty Shades of Grey” and playing a vampire in the TV series “True Blood.”

“‘Yellowstone’ changed my life in many, many ways,” he said. “The biggest change is that I now live where we shot the show in Montana. The first time I went there, I would have never thought I would ever live there.

“I would come back to the city after shooting. But a little bit more each year, I felt more out of place here, and more peace and at home there. I’m a big nature person — I never was a big city person, but I had to be here to do what I wanted. But after the third season, my wife and I decided to move there. We wanted to start a family.”

The topic of a Kayce spinoff kept coming up during the filming of the finale, but “meanwhile we were having a baby, so that was the biggest thing on my plate.”

“‘Yellowstone’ changed my life in many, many ways,” said Luke Grimes.

(Jay L. Clendenin/For The Times)

Grimes was also dealing with the off-screen drama that impacted production due to logistical and creative differences between Costner and Sheridan. Costner, who was the show’s biggest attraction, exited after filming the first part of the final season. His character was killed off.

Asked about the backstage tension, Grimes said, “I just tried to do my job to the best of my ability, and not get caught up in all that. It was sort of frustrating, but I felt lucky to have a job.”

He recalled getting a call from Sheridan about the plans for a spinoff: “He said, ‘I think you should talk to the guy who is going to be the showrunner. I’m not telling you to do it, and I’m not telling you not to do it. But Spencer is great and he has some good ideas.’ ”

Hudnut said Kayce “was always my favorite character. Also, Luke is not Kayce. Kayce is an amazing character, but Luke is really thoughtful and smart. He is a true artist and has an artist’s soul, while Kayce is kicking down doors and terrorizing people. And Luke has such a great presence. He can do so much with just a look to the camera. He is a true leading man.”

In addition to starring in “Marshals,” Grimes is also an executive producer. He pitched the opening sequence — a flashback showing Kayce in the battlefield. He also performs the song that plays over the final scene, in which he visits his wife’s grave. The ballad is from Grimes’ self-titled country album which was released last year.

“Luke’s creative fingerprints are all over the pilot,” Hudnut said.

Grimes said he does not feel pressure about being the first follow-up from “Yellowstone” to premiere.

“We’re not trying to make the same show, so no matter what happens, its a win-win,” he said. “I had a blast doing it.”