Yellowstone Season 5 part 2: The fans of Yellowstone are upset over disturbing goodbye to Kevin Costner’s character John Dutton. In the first episode of the second half of Season 5, it was revealed that the Dutton family patriarch, played by Kevin Costner, was killed after a fatal gunshot wound in the bathroom of the Montana governor’s mansion. Costner announced on social media in June that he would not be returning to Yellowstone.