The official trailer and sneak peek for *Marshals* Season 1 Episode 12, titled **“The Devil at Home,”** dropped this week, and fans are already calling it one of the most intense promos of the season. Airing Sunday, May 17, 2026, at 8/7c on CBS (and streaming on Paramount+), this penultimate episode promises to deliver cartel violence, fractured team loyalties, and a personal reckoning that could redefine Kayce Dutton’s future in the U.S. Marshals. Something huge is about to shake everything to its core — and the devil may already be inside the house.

Aftermath of Episode 11’s Bombshells

Last Sunday’s Episode 11, “On Thin Ice,” left viewers reeling. Stranded in a brutal mountain blizzard with escaped convict Neil Lamb (a former Yellowstone ranch hand bearing the brand), Kayce (Luke Grimes) and Pete “Cal” Calvin (Logan Marshall-Green) faced impossible choices. The episode finally revealed the painful truth about their Navy SEAL brother Roner’s death in Afghanistan — a mission gone wrong where blame, guilt, and a devastating cover-up fractured their brotherhood for years.

Calvin learned the darkest corners of Kayce’s Dutton past, including echoes of the infamous “Train Station” and the moral compromises that come with protecting the family legacy. Tragically, their comrade Garrett (Riley Green) died in the hospital, adding another layer of grief to the already heavy emotional load. The trailer for Episode 12 opens with haunting callbacks to these revelations: quick cuts of snow-covered mountains, a bloodied badge, and Kayce staring into the distance with the weight of two worlds on his shoulders.

Trailer Breakdown: Cartel Invasion and Rogue Marshal

The 30-second official promo wastes no time ramping up the tension. Sweeping drone shots show cartel operatives moving through the shadows of the Broken Rock Reservation at night. “They’re not just moving product — they’re poisoning the land,” a voiceover warns as young faces from the reservation appear, underscoring the human cost.

The core plot kicks in as the Marshals team — Kayce, Cal, Belle Skinner (Arielle Kebbel), Andrea Cruz (Ash Santos), and others — races to locate Deputy Marshal Miles Kittle (Tatanka Means). Leaked footage and the sneak peek reveal Miles has gone full rogue, disappearing off-grid to hunt down a high-level trafficker with a personal vendetta. One chilling clip shows Miles in tactical gear, moving alone through remote terrain, his face set in grim determination. “If you go rogue, it’s going to be held against you,” Cal warns in a tense team briefing.

The trailer intercuts this with visceral action: gunfire erupting near reservation homes, a high-speed pursuit on dusty backroads, and a haunting image of a body floating near a melting frozen lake — possibly a victim of the cartel’s escalating violence. Fans are speculating this discovery ties directly into the “devil at home” theme, suggesting the threat isn’t just external but has infiltrated the community or even the Marshals unit itself.

Sneak Peek Highlights: Kayce’s Breaking Point

An exclusive sneak peek released by CBS offers deeper insight. In one scene, Kayce confronts Thomas Rainwater (Gil Birmingham) on reservation land. Their conversation crackles with history: “This isn’t just their fight anymore,” Kayce says, his voice heavy with the knowledge that his son Tate (Brecken Merrill) is growing up in the middle of this chaos. Rainwater’s response hints at larger alliances and betrayals to come.

Another intense moment shows Cal and Kayce in a heated exchange about Miles. Cal, still processing the Roner truth and Garrett’s death, questions whether the team can hold together. “The devil isn’t out there in the mountains — he’s been riding with us,” he says, a line that has already gone viral among fans. Andrea and Belle get brief but powerful moments, with subtle tension suggesting Andrea’s growing closeness to Kayce might face new tests amid the crisis.

The peek ends on a cliffhanger visual: Miles standing over a target, weapon drawn, as distant sirens wail. Will the team bring him in, or will Kayce — ever the protector — make another impossible choice?

What This Means for the Season Finale and Beyond

With only one episode left after this, “The Devil at Home” is clearly designed as a massive setup for the Season 1 finale. Showrunners have leaned into the Sheridan-verse tradition of blending pulse-pounding action with deep character exploration. Kayce’s journey from grieving widower and ex-rancher to federal marshal has been defined by loss — Monica, his father John, and now the ghosts of his military past. This episode forces him to decide what kind of man (and father) he truly is when the badge and the brand collide.

Fan reactions on social media have been electric. #MarshalsEpisode12 and #DevilAtHome trended immediately after the trailer dropped, with many praising the seamless integration of Yellowstone lore. Some are theorizing a major betrayal within the team or a surprise crossover tease. Others worry for Miles, whose rogue arc feels like it could end in tragedy or redemption.

Filmed in the stunning, rugged landscapes of Montana, the episode features the series’ signature cinematic style — golden hour shots of open plains, tense nighttime raids, and intimate family moments that ground the chaos. Luke Grimes continues to deliver a nuanced performance, showing Kayce’s quiet strength cracking under pressure in ways that feel earned after years of Yellowstone buildup.

Don’t Miss This Game-Changer

*Marshals* has quickly become must-watch television for Yellowstone fans and newcomers alike, blending procedural thrills with neo-Western soul. Episode 12 looks set to deliver on every promise: higher stakes, darker twists, and emotional payoffs that will leave viewers breathless heading into the finale.

Mark your calendars — Sunday, May 17, 2026. Stream it on Paramount+ the same night (Premium) or next day (Essential). Whether you’re Team Kayce, rooting for team unity, or bracing for more heartbreak, one thing is certain: the devil at home is about to reveal himself, and nothing in the Marshals world will ever be the same.

The trailer has everyone talking. Now the real question is — are you ready for what comes next?