The Yellowstone universe expanded further on Sunday, March 29, 2026, with the airing of "Lost Girls," the fifth episode of the new CBS spinoff series, Marshals. Formerly known by the working title Y: Marshals, the procedural drama stars Luke Grimes as Kayce Dutton, who has left his family's ranching roots to join an elite U.S. Marshals unit in Montana. The episode premiered at 8:00 p.m. ET on CBS and is currently available for on-demand streaming via Paramount+.

Showrunner Spencer Hudnut and executive producer Taylor Sheridan centered the latest installment on the urgent crisis of missing Indigenous women and girls. In the high-stakes narrative, Kayce goes rogue to investigate a human trafficking ring linked to the Broken Rock reservation. The mission serves as a tribute to the legacy of his late wife, Monica Dutton, whose advocacy for the cause was a central theme in the original series. Brecken Merrill returns as Tate Dutton, appearing alongside Gil Birmingham as Chief Thomas Rainwater and Mo Brings Plenty as Mo.

Produced by 101 Studios and Bosque Ranch Productions with a reported budget of $52 million for its 13-episode debut season, Marshals continues to bridge the gap between serialized Western drama and network procedural. The ensemble cast includes Logan Marshall-Green as Pete Calvin, Arielle Kebbel as Belle Skinner, and Tatanka Means as Miles Kittle. While Paramount+ Premium subscribers were able to stream the episode live, the installment became available for all subscribers on Monday, March 30.