Onscreen, Mo Brings Plenty plays Rainwater’s right-hand man on the Broken Rock Reservation, but off-screen he plays a much deeper role in the Yellowstone franchise as the coordinator for American Indian Affairs. Mo discusses how he works behind the scenes with Taylor Sheridan to ensure the series appropriately represents Native culture, from the American Indian Boarding School in “1923” to Kayce’s spiritual journey in Season 4 of “Yellowstone”.