(Part II of II) The castaways on the raft are surprised at sea by something unexpected. Meanwhile, remaining islanders attempt to blow open the hatch, and a visitor to the encampment might be a threat to Claire’s infant son.

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(Part I of II) The French woman — Rousseau — shocks the survivors by showing up with a dire warning about “the others.” Meanwhile, Michael and Jin ready the raft for sailing.

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Jack suspects foul play when Michael becomes violently ill while building the raft. Meanwhile a secret from Kate’s past is revealed, the mysterious hatch is shown to a few of the survivors, and Walt gives Locke a warning.

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After burying one of their own, tempers flare as the castaways’ suspicions of each other grow — and an unlikely survivor vows revenge. Meanwhile, Claire and Charlie struggle to calm her newborn.

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Claire goes into labor while a helpless Charlie goes into panic mode. Meanwhile Locke is missing, Jack tends to a wounded survivor and Sayid presents Shannon with a romantic surprise.

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Locke and Boone build a trebuchet in an attempt to open the hatch, but Locke is injured when the trebuchet fails. Literally following a hallucination, Locke and Boone discover a small plane crashed high in a tree. Sawyer, suffering from severe headaches, is forced to turn to Jack for help.

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When Hurley becomes obsessed with the French woman and heads into the jungle to find her, Jack, Sayid and Charlie have no choice but to follow. Meanwhile, Locke asks Claire to help build a mysterious item.

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When Jin Kwon is having a serious quarrel with his wife Sun Kwon, Michael Dawson defends her. Later, when Michael’s raft is set afire and Jin has his arms injured by heat, Michael and Sawyer blame him for the incident. Sun finally reveals her secret when she speaks in English to defend her husband and [...]

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James “Sawyer” Ford wakes up from a nightmare with a boar inside his tent. He finds his canvas in the woods, but is attacked by the animal. He decides to chase the boar with Kate Austen following its track in the forest. Along their hunting, Sawyer recalls his dark past since he was a child [...]

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After the missing Claire returns with no recollection of what has happened since before the doomed flight of Oceanic 815, Jack and Locke formulate a plan of defense against her kidnapper, the mysterious Ethan Rom, who threatens to kill off the other survivors unless Claire is returned to him. Meanwhile, the disappointment Charlie feels when [...]

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John Locke is teaching Walt Lloyd to throw knives, and Michael Dawson feels jealous with the situation. He forbids Walt to meet Locke, and recalls his romance with Walt’s mother Susan Lloyd (Tamara Taylor), a overachieving executive who took the infant Walt away, and Michael having an awkward reunion 10 years later with the uncertain [...]

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Boone Carlyle is jealous of Sayid Jarrah, because he becomes close to his half-sister Shannon Rutherford. Boone tells John Locke that he wants to reveal the secret about the hatch in the woods to Shannon. Locke hits Boone, heals his head with a medicine and fastens him with a rope in a tree, living him [...]

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