"American Ninja Warrior" arrives in Las Vegas, Nevada where the season's top competitors tackle a four-stage course. Ninja veterans Lance Pekus, Allyssa Beird, Joe Moravsky and Jesse "Flex" LaBreck are scheduled to compete. The finalists will vie to win a cash prize of $1 million and the title of "American Ninja Warrior." Matt Iseman and Akbar Gbajabiamila host as Kristine Leahy co-hosts.