Season 1 focuses on a class action lawsuit against the fraudulent multi-billionaire CEO of a defunct company; the plot was inspired by various corporate scandals and characters involved in them, most notably the 2001 Enron scandal. Season 2 deals with the energy industry and related environmental issues; the story is influenced by recent and ongoing environmental cases in the United States in the mining industry and by the events of the 2001 California energy crisis. The writers were guided by environmental lawyer Robert F. Kennedy, Jr., who shared his experience in the field with various corporations and CEOs. Season 3 is largely based on the 2009 Bernie Madoff scandal. Season 4 describes events based on the Blackwater Security Consulting scandal.