Reviewing the events of the series; past and present cast members discuss their experiences.

The Man in Black’s final fate is determined, and one survivor must make the ultimate sacrifice to save the island. Meanwhile, in another life, the ones who might have been the survivors gather for a final time.

Jack, the new protector of the island, meets with Locke and they go past the bamboo field with Desmond to visit the heart of the island.

Locke devises a new strategy; Jack’s group searches for Desmond.

The motives of John Locke are finally explained.

Jack’s suspicions about Locke make his decision more difficult after he is asked to complete a difficult task.

Alliances are forged and broken as the Locke and Jack camps merge.

Hurley agonizes over what the group should do next, and Locke is curious about the new arrival to his camp.

Desmond wakes up to discover he’s back on the island.

Sun and Jin desperately continue their search for one another, and Locke confronts his enemy.