- "American Ninja Warrior" travels to St. Louis, Missouri where competitors face new obstacles the Rope Junction Into Cargo, Double Tilted Ladder and Crazy Cliffhanger. X-Games gold medalist Kevin Robinson, motorcycle racer Dominic Anderson and "Ghost Adventures" host Nick Groff compete. Former Olympic gymnast turned police officer, Terin Humphrey, returns for another shot at completing the course. Competitors in this rigorous obstacle course competition series vie for a chance to win a cash prize of $500,000 and the title "American Ninja Warrior."