Episode 421a

Top finishers from the regional rounds advance to the final "Las Vegas" round, which featured the ultimate challenge - a stunning four-stage obstacle course modeled after the famed "Mount Midoriyama" in Japan. Matt Iseman hosts the heart-racing competition show in which competitors take on various "finals round" stages as they vie to move onto the final stage 4 in their quest for a $500,000 cash prize and the title of American Ninja Warrior.