After waking up in the jungle and having a vision, Locke sets out to rescue Mr. Eko from a menacing captor. Hurley returns to the beach camp to report on the fate of Jack, Kate, and Sawyer.
Eko is driven into the jungle by a vision of his brother, who tells him he must seek forgiveness. Locke leads a group to the Pearl station in the hopes of using the surveillance system to find Jack, Kate, and Sawyer.
Pickett's threat on Sawyer's life brings Kate and Sawyer together, and prompts her to remember a man from her past. Jack makes a decision about Ben's offer.
Jack uses Ben's life on the operating table to try and free Kate and Sawyer, but Juliet has an agenda of her own. When Kate and Sawyer manage to escape, they must find help from one of the Others in order to make it back to their island.
After a premonition leads Desmond to save Claire's life, Charlie tries to find out what happened to him when the hatch imploded. Desmond considers the possibility that he has been given a second chance with Penny when he wakes up at home.
Jack learns that Juliet's life is in danger because of what she has done, and he is the only one who can save her. Sawyer comes to a decision as he, Kate, and Karl make their escape from the second island.
When Hurley discovers a wrecked car in the jungle, he sees it as his chance to break his curse and find hope. Kate and Sawyer return to the beach camp, but it isn't long before Kate strikes out to find help in rescuing Jack.
Sayid, Kate, and Locke encounter the mysterious man with the eye patch, living alone at a Dharma Station after an apparent truce with the Others. Sawyer challenges the beach residents to a ping-pong match to win back his stash.
Claire comes up with a plan to get everyone rescued, but is surprised when Charlie doesn't support her and Desmond tries to thwart her efforts. Sayid, Locke, and Kate march their prisoner across the island in the hopes of finding the Others' home and rescuing Jack.
As Kate and Sayid attempt to rescue Jack from the Others, Locke pays a visit to Ben in the hopes of finding their submarine. But the seemingly helpless Ben has an agenda of his own.
When Nikki stumbles out of the jungle and dies mysteriously, Hurley and Sawyer head an investigation into her demise -- leading them to Paulo's body as well.
When the Others decide to leave their neighborhood, Kate is left unconscious in the jungle to fend for herself -- handcuffed to Juliet, who has also been abandoned. Sawyers tries to improve his image when Hurley warns him that the beach camp is about to vote him out.
Jack is reunited with the survivors on the beach, who are shocked to see that he has brought one of the Others back with him. Juliet tries to make new friends by saving Claire's life when she falls deathly ill.
After seeing a flash of Charlie dying in the jungle, Desmond risks his new friend's life by leading him, Jin, and Hurley on a mission to find a visitor he believes is on her way. Kate faces her conflicted feelings when she sees Jack and Juliet together.
Juliet offers Sun a chance to find out who her baby's father is, but with a personal catch. Desmond, Charlie, Jin, and Hurley must rely on an enemy to save the life of an unknown woman who has parachuted onto the island -- and who brings a startling revelation about Flight 815.
To stay in good graces with the Others, Locke enlists help from Sawyer to kill a man who has caused them both great pain. The beach camp residents are convinced that the new arrival may be their ticket off the island, but can no longer trust Jack.
When Locke rejoins to the Others, Ben reluctantly agrees to take him to Jacob, their enigmatic leader -- revealing new secrets about Ben's own childhood on the island. Back at the beach camp, the survivors confront Juliet about her true agenda.
Charlie is convinced that he must sacrifice himself to help his friends make it off the island. After learning that the Others are about to attack, Jack hatches a plan to ambush them.
The beach camp initiates their plan to ambush the Others and contact Naomi's nearby boat -- if Charlie and Desmond can successfully disable the underwater jamming signal. Ben attempts to convince Jack that leaving the island is a mistake.
