Marshals shocked Yellowstone fans by killing Monica off - and are they now having Kayce Dutton move on after just four episodes? During the Sunday, March 22, episode, Kayce (Luke Grimes) helped someone who got stranded after a plane crash. His daughter appeared quite grateful and by the end of the episode, she was flirting with Kayce at the bar. "I wish I knew a local who could give me a crash course on all things Big Sky. You were born and raised here, what do you say?" Dolly (Ellyn Jameson) said while flirting with Kayce, who replied, "Maybe.