Zack Sharf Digital News Director Kevin Costner recently joined his “Horizon: An American Saga” cast for a live recording of the “Happy Sad Confused” podcast, and he said his planned four-movie saga differs from many Western films that have come before in that its female characters “drive the story in every plot line.” Costner, who co-wrote the franchise with Jon Baird, said he “couldn’t conceive of a scene that didn’t involve a woman” while shaping the story. “Horizon” chronicles the journey of several characters during and after the Civil War as they settle the American West. Kevin Costner stars in the film opposite a sprawling ensemble cast, which includes Sienna Miller, Jena Malone, Isabelle Fuhrman, Abbey Lee and Ella Hunt.