Heavy Metal

S1 E4: Once people disappear, New York City experiences its next great crash. In this episode, we reveal the breaking point of precious metals: skyscrapers face collapse, bridges hang by a steel thread; and the fate of our nation's secret stash of gold. Meanwhile, a fatal weakness is exposed in the Gateway Arch, breweries reveal untapped potential for disaster, and horses make a surprising bid to stay alive in a life after people.