Synopsis:
When Boone threatens to reveal the details about the metal door he and Locke found, Locke ties him up and drugs him. In his drugged state, Boone remembers his past with Shannon, who is actually not his biological sister, but a step-sister. Kate finds out that Sun can understand and speak English. Hurley tries to fish with Jin to repair whatever insult he'd made by refusing a sea urchin on their first day on the island and accidentally steps on an urchin.