TMDb/Marshals TV Yellowstone spinoff Marshals shocks with Monica's death, but showrunner hints Kelsey Asbille could return via flashbacks or hallucinations. April 25, 2026 AceShowbiz - Yellowstone's spinoff series Marshals left fans stunned with the sudden death of Monica, played by Kelsey Asbille. Despite this shocking plot development, there remains a possibility that Asbille could still appear in the series in some form, such as flashbacks or hallucinations, according to the showrunner Spencer Hudnut.