Lost

Season 3, Episode 20

Episode Title: The Man Behind the Curtain

Air Date: 2007-05-09

Overview:

Ben unwillingly divulges information to Locke about the island, taking him on a journey to various locations including strange monuments and the mysterious Jacob. Back at the beach, Juliet's secret is revealed. Flashbacks will show us the origins of DHARMA and the history of the island, including 'the purge.'