Locke thinks he's being sent a sign on how to get the hatch open, and he and Boone venture inland. Locke begins to have difficulties with walking as he and Boone try to find a way into the hatch. Jack is reluctant to offer assistance when Sawyer begins to experience excruciating headaches and needs glasses. In this episode we learn more about Locke's shocking and tragic encounter with his scheming biological parents. Lastly, as Locke confronts his troubled past and struggles to open the hatch, Boone is seriously injured after an accident involving a plane that the pair found in the forest.

A Locke-centric episode.