TMDb/Marshals TV Monica Dutton is dead. Mourn with Kayce in the somber Yellowstone Marshals premiere. A major loss sets the tone for the new spin-off series. March 21, 2026 AceShowbiz - Yellowstone Marshals, the new spin-off from the acclaimed Yellowstone series, opened its premiere episode with a powerful and heartbreaking twist: the death of a major character. The show, which aired its first episode on March 1, revealed that Monica Dutton, portrayed by Kelsey Asbille, has died, a storyline that sets a somber tone for the series moving forward.