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).