Episode 1.19: Deux Ex Machina
Airdate: March 30, 2005
Medical problems abound, as Jack toys with letting Sawyer suffer from his blinding headaches and Locke develops strange symptoms of his own while trying to crack open that enigmatic hatch. Meanwhile, the rift between Michael and Jin makes work on the raft quite a chore.
Boone becomes concerned when Locke suffers physical problems while they try to find a way into the mysterious hatch. Meanwhile, Jack is reluctant to help when Sawyer starts to experience excruciating headaches, and Michael and Jin struggle to communicate while working together on the raft.