Season 1, Episode 1: The Washington Sniper Original Air Date—9 November 2009 In October, 2002, the people of the Washington, DC, area are in the grip of terror. A sniper is killing innocent and random victims and investigators seem to be chasing a ghost - the killer is mobile, and there might be more than one. Season 1, Episode 2: BTK Original Air Date—27 August 2010 Season 1, Episode 3: Green River Killer Original Air Date—26 June 2010