When Oceanic Flight 815 crashed on an island in the middle of the Pacific, each survivor was given a choice to live together or die alone. Thrown together in this mysterious place, they have struggled to overcome shadows from their past in order to survive and answer the questions that plague their new lives on the island. Where are they? Is rescue on its way? What else is on this island? In "LOST: Past, Present & Future," relive their story of survival to prepare for the shocking season four premiere that will change everything.