The Hatch unexpectedly locking down turns out to be a blessing in disguise, as it reveals a map of unknown origin to Locke, whose trapped under a blast door and needs to push the button before the timer runs out. Hurley's food addiction overcomes him in the form a friend from his life of the Island, who isn't all he seems to be. We also learn the truth about Henry Gale and just where it is Hurley may recognize Libby from.