Marc Menard

House exasperates Cuddy when he suggests that two sick babies in one hospital add up to an epidemic. Even more frightening is when it turns out he may be right. As more babies are quarantined and the maternity ward is shut down, Cuddy powerscrubs the hospital and House spars with Cameron and the team over his plan to sacrifice one baby for the good of the rest.

Kate takes desperate measures when her custody of Aaron is threatened; as the flashes increase in frequency on the Island, the survivors - especially Charlotte - begin to feel the affects as they attempt to get to the Orchid.

Jin washes up on an Island beach and encounters Rousseau's team during their first few days; Jin eventually joins the others as they finally reach the Orchid - possibly too late for some; Sun is told the truth about Jin by Ben.