Join professional rigger, adventure junkie and science geek Sean Riley as he rappels into the world of mechanical mayhem, major maintenance projects and emergency repairs that threaten to bring the world you know to a standstill. Get a close-up view of essential infrastructure, broken dams, busted bridges and broken down mega machinery. Riley meets the folks working 24/7 to keep the wheels of heavy industry spinning smoothly and lends a hand when he can. Come along and see how the experts are harnessing solar and wind energy to meet tomorrow's energy demands, launching satellites into space so we can stay in tune and online, and fixing big broken machinery essential to keep our world turning. Riveting, shocking, electrifying. Produced by National Geographic.