Alex Gibney's Oscar-nominated documentary traces the rise and fall off one of America's biggest ever corporations, Enron. The company began in 1985 when Ken Lay gambled on the deregulation of the energy industry and set up Enron, becoming CEO. In 2001, Ken Skilling joined him at the top and in the mid-90s boom, Enron were on everyone's lips as a success story, with investors flocking to buy shares.