As a recipient of the MacArthur Fellowship (also known as the MacArthur Genius Grant), you could say filmmaker Sterlin Harjo is a certified genius. He’s responsible for creating the groundbreaking series “Reservation Dogs,” which follows the lives of four Indigenous teenagers in rural Oklahoma. Now, Sterlin is back with a new series called “The Lowdown,” starring Ethan Hawke as a rough-and-tumble bookstore owner and "truthstorian" in Tulsa, Oklahoma. He sat down with Tom Power during this year’s Toronto International Film Festival to talk about his career — and how being a genius really just means your friends will give you a hard time about it.