In an encore presentation from the acclaimed series "Money, Power and Wall Street," FRONTLINE explores how an "epidemic of greed" spread from financial institutions in the United States to Europe and back. Correspondent Martin Smith (College, Inc., The Madoff Affair) reveals a trail of complex deals that contributed to a European crisis that today threatens to sink the global economy into another slump. Almost four years after the meltdown, FRONTLINE examines how regulators have tried to fix an industry steeped in conflicts of interest, excessive risk taking and incentives to cheat. New rules and regulations are being written, but can they prevent the next crisis?