One Yellowstone star has confirmed who is taking over the Ranch following John Dutton’s (Kevin Costner) exit in season 5 part 2, teasing what this means for the future. Yellowstone season 5 part 2 will mark the end of the Western series, with Costner not set to appear during the final episodes. While its still unclear how the patriarch of the Dutton family is going to be written out, his absence does mean someone is going to have to take on a new leadership role at the Ranch.