Luke Grimes reveals it's something bigger than the Kevin Costner drama that has stalled the show's progress. That something is the ongoing writers' strike. "We have not [started filming the second half of season 5] because of the writers' strike," Grimes confirms to People. "I think we would be if it weren't for that, but that takes precedence over everything. They got to get that all sorted, and then we'll be getting after it," he adds. Are you a fan of ‘Yellowstone,’ and if so, what keeps you tuning in?