Forty-eight survivors of an airline flight originating from Australia, bound for the U.S., which crash-lands onto an unknown island 1000 miles off course, struggle to figure out a way to survive, while trying to find a way to be rescued.

Jack, Kate and Charlie return to the group, but the transceiver is broken. Sayid Jarrah fixes the apparatus and organizes an expedition with Kate, Charlie, Shannon Rutherford and her brother Boone Carlyle and the dangerous James “Sawyer” Ford to hike and climb a mountain to transmit a SOS. The group receives a sixteen years old [...]

The U.S. marshal’s assignment is revealed. Later, there is a difference of opinion between Jack and Sawyer as to how to help the critically injured marshal. Flashback to what Kate was doing in Australia. Scenes of the crash from Kate’s POV. A small group sets off with a transceiver in an effort to send a [...]

When the survivors run out of food, Locke, Kate, and Michael go out hunting for boar. Michael gets injured, so he and Kate go back. But Locke stays out hunting, and ends up running into the creature living in the jungle.

Jack begins to experience visions of his dead father Christian. He runs into the jungle trying to find him, but things go wrong when he falls down a hill and off a cliff.

Jin tries to beat up Michael for no reason at all; Jack wants to move the survivors over to the caves, although some people disagree; Sun reveals to Michael that she can speak English.

Trying to kick his drug habit with encouragement from Locke, Charlie starts to go through heroin withdrawl, struggling with his resolve. Jack is trapped in a cave-in, and Charlie becomes trapped with him when the first rescue tunnel collapses as well. Kate, Sayid, and Sawyer attempt to triangulate the position of the distress signal coming [...]

Shannon his having an asthma attack, and Boone is sure that Sawyer has her medications- but he won’t give it. As Kate’s way to deal with this situation doesn’t work, Sayid takes things into his own hands… and IT WILL NOT end good.