Y: Marshals Trailer: Kayce Dutton & Thomas Rainwater

 The world of Yellowstone refuses to stop growing, and fans are about to witness an entirely new saga that puts Kayce Dutton front and center. The upcoming series, Y: Marshals, promises to deliver a storyline that blends the rugged traditions of Montana with the high-stakes world of federal law enforcement. While several spinoffs are branching off into Texas—like the Beth and Rip project filming alongside 6666—Y: Marshals remains firmly rooted in Montana. That makes this series incredibly significant, as Kayce stands as the last Dutton actively protecting the family’s legacy in their home state.

Even though this project won’t be written by Taylor Sheridan or air on Paramount+ like the other Yellowstone shows, many believe it might be the most authentic sequel yet. At its heart, Yellowstone has always been about the Duttons. For many viewers, Kayce stepping into this lead role feels like a natural continuation of the saga, perhaps even more meaningful than the other spinoffs announced so far.

So, what can fans expect from Y: Marshals?

Kayce Dutton Takes the Lead

Luke Grimes is back as Kayce Dutton, the youngest Dutton son, who has chosen to step away from life on the ranch. Instead, he’s bringing his Navy SEAL training and cowboy instincts into an elite unit of U.S. Marshals. This new chapter puts Kayce in the middle of high-risk missions where he must balance law, order, and family. He will be tested not only as a lawman but as the final defender of the Dutton legacy in Montana. The setup promises grit, action, and plenty of emotional struggles as Kayce faces violence in a land that never truly finds peace.

Familiar Faces Return

The trailer and casting news confirm that Kayce won’t be alone. Several well-known Yellowstone characters are joining him in this new adventure:

• Brecken Merrill returns as Tate Dutton, Kayce’s son. Tate’s story will carry heavy weight here as he grows into adulthood while living in the shadow of his father’s military past and ranching heritage. Fans have mixed opinions on Merrill’s acting in the original series, but this spinoff offers him a chance to shine. Tate’s relationship with Kayce will undoubtedly be one of the emotional anchors of the series.

• Gil Birmingham reprises his role as Thomas Rainwater, chief of the Broken Rock Reservation. Rainwater’s political power and history with the Duttons always kept viewers guessing whether he was an ally or a rival. His inclusion guarantees more of Yellowstone’s signature political and cultural clashes. Many fans see Rainwater as a mentor-like figure to Kayce, and his presence ensures that the heart of the Yellowstone politics stays alive in Y: Marshals.

• Mo Brings Plenty returns as Mo, the loyal right-hand man of Rainwater. His role as a moral compass and guide for Kayce on the reservation has always been well-received, and his return adds even more weight to the cast.

  

The Missing Piece – Monica

But not everyone is coming back. One of the biggest shocks is the absence of Kelsey Asbille as Monica Dutton. According to reports, Monica’s character will be killed off-screen. This decision has divided fans, many of whom wanted to see Kayce and Monica’s complicated relationship explored further in their own spinoff. Instead, Kayce will be navigating grief while possibly facing new love interests in future episodes. The move is controversial but also opens narrative space for fresh storylines around Kayce’s personal life.

New Faces, New Conflicts

Beyond the Yellowstone veterans, Y: Marshals introduces an entirely new slate of characters who will form Kayce’s Marshal team:

• Arielle Kebbel plays Belle, a skilled marshal who adds both toughness and sharp instincts to the group.

• Ash Santos stars as Andrea, another federal officer whose determination and drive will make her an interesting counterpart to Kayce.

• Tatanka Means joins as Miles, bringing intensity and experience to the Marshal unit.

• Brett Cullen takes on Harry Gford, the head of the Montana U.S. Marshals. Gford will serve as both a mentor and a pressure point for Kayce, constantly pushing him to succeed in high-stakes cases.

These fresh additions create opportunities for new conflicts, alliances, and personal dynamics. They’ll also bring modern energy into the Yellowstone world, mixing federal law enforcement with the traditional western themes we’ve always associated with the Duttons.

Yellowstone Roots Stay Intact

What makes Y: Marshals truly exciting is that even though it’s breaking away from the ranch life, it still feels connected to Yellowstone’s core DNA. Rainwater’s involvement keeps the Broken Rock storyline alive. The possibility of political battles over land rights, the Yellowstone Ranch, and Montana’s future remain strong themes. Rumors even suggest that Rainwater might take over the main Yellowstone ranch house, turning it into his base of operations—a bold move that ties the spinoff directly back to the original show.

Behind the Scenes

The series is being produced by Paramount TV Studios, with Taylor Sheridan remaining as an executive producer to ensure the trademark tone of Yellowstone is preserved. Other executive producers include David C. Glasser, John Linson, Art Linson, Luke Grimes, and more. Spencer Hudnut is the showrunner, penning the first episodes, while Yanis will direct. The release is planned for the 2025–2026 broadcast schedule, making it highly likely that Y: Marshals will be the first Yellowstone sequel we get to watch.

What This Means for Fans

For Yellowstone enthusiasts, this show offers the best of both worlds: the emotional weight of Kayce’s personal journey, the return of beloved supporting characters, and the thrill of new law enforcement-driven plots. While losing Monica is painful, her absence might pave the way for storytelling that feels sharper and more unpredictable. At the same time, keeping Rainwater and Mo in the mix ensures that the Dutton saga never strays too far from its origins.

This series may not feature the entire Dutton family, but in many ways, it carries their legacy forward more directly than any other spinoff. Kayce is now the heart of Montana’s fight—against crime, political corruption, and the ghosts of his family’s past. With a blend of new marshals, old rivals, and the constant shadow of the Dutton name, Y: Marshals is shaping up to be one of the most compelling Yellowstone stories yet.

So get ready, because when Y: Marshals finally hits screens, it will prove one thing: Yellowstone may be expanding, but its soul is still right here in Montana with Kayce Dutton and Thomas Rainwater leading the charge.

 The world of Yellowstone refuses to stop growing, and fans are about to witness an entirely new saga that puts Kayce Dutton front and center. The upcoming series, Y: Marshals, promises to deliver a storyline that blends the rugged traditions of Montana with the high-stakes world of federal law enforcement. While several spinoffs are branching off into Texas—like the Beth…