Hurley sees the numbers written on Rousseau's maps and goes to find her. Sayid, Jack, and Charlie follow him. When Hurley finds Rousseau she agrees with him that the numbers are cursed. They were transmitted from a tower there on the island. Rousseau changed the transmission after her entire team died.
Meanwhile, Locke and Claire build something, but it isn't until the end that Claire sees that it's a cradle for her baby.