Riley travels to Las Vegas to help high-flying Cirque du Soleil solve a real showstopper of a problem - one of the world's largest, most technologically advanced stages is broken. To make the repair, Riley and team have to lower the 80-ton stage and take a look inside - a process never before attempted. While in Sin City, Riley helps repair some of most amazing spectacles on the Strip, including the world's largest video screen and high-tech water cannons in the Bellagio fountain.