Alex Gibney (born October 23, 1953) is an American documentary film director and producer. In 2010, Esquire magazine said Gibney"is becoming the most important documentarian of our time".known for Enron: The Smartest Guys in the Room (2005), Taxi to the Dark Side (2007) and Mea Maxima Culpa: Silence in the House of God (2012).