Plot summary
Aaron grows sick and Rousseau tells Claire that he is "infected." Libby, a clinical psychologist, helps Claire recall her time being abducted by Ethan Rom, which she remembers while she and Rousseau search for a cure for Aaron. During that time, Ethan takes a docile Claire to the "Staff" station and gives her "vaccinations" for the baby. She sees him being admonished by Tom about his unprepared "list" and she agrees to give Aaron to the Others. A teenage Other forces her outside, insisting they are going to kill her, and she is brought back to camp by Rousseau. In the present, they find that the vaccines are gone. Claire wonders if the girl who saved her was Alex Rousseau, and finds that Aaron is healthy when she returns. Having overheard Jack and Locke arguing, Henry subtly manipulates the latter by questioning his authority.
Credits
Adapted from Wikipedia contributors, Lost season 2. HTML formatting and reference markers removed.