Episode Synopsis: "Indian Relay" chronicles a season of Indian relay-horse races, which are popular within Native American communities across the Rocky Mountain West. Teams from the Shoshone-Bannock, Crow and Blackfeet nations in Idaho and Montana are featured. The races feature riders leaping from horse to horse after the first two laps of a three-lap race around a track, with each team's handlers catching the dismounted horse or risk being disqualified.