S4E11 · Cabin Fever

Complete story — includes the ending

Locke is abandoned by his teenage mother at birth and is approached by Richard, who asks him to pick from a series of items and leaves abruptly when he chooses a knife. He also encounters Abaddon during physical therapy. In the present, an unstable Keamy returns to the Kahana, and Gault complies with Sayid's request to sneak him off the boat. After receiving Daniel's message about Ray's death, Keamy kills him and throws his body overboard. He kills Gault for interfering and forces Lapidus to fly his team to the island, who tosses a satellite phone onto the beach as they fly overhead. Locke has a vision of Horace Goodspeed and goes to the purge grave, finding a set of blueprints on Goodspeed's body. He uses them to find the cabin, where Christian, sitting with Claire, speaks for Jacob. Locke informs Ben that "we need to move the island."