"American Ninja Warrior" travels to Indianapolis, Indiana where competitors tackle six obstacles including the brand new Floating Steps, Fly Wheels and Disk Runner. "American Ninja Warrior" veterans Meagan Martin and Brian Arnold, from the famed Colorado rock climbing team "The Wolfpack," return, while Indianapolis 500 Champion Hélio Castroneves and NASCAR's Ricky Stenhouse Jr. take on the course for the first time. Competitors in this rigorous obstacle course competition series vie for a chance to win a cash prize of $1,000,000 and the title "American Ninja Warrior."