When does American Ninja Warrior return?

American Ninja Warrior is an American sports entertainment reality show based on the Japanese television reality show, Sasuke. It features a set of obstacle courses in various cities, which competitors attempt to conquer. The competitor who finishes all the courses in the fastest time wins a cash prize of $1,000,000. To date, only three competitors have won the main cash prize: Isaac Caldiero, Drew Drechsel, and Vance Walker (who is the only competitor to do it twice)