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Feeling that their rescue is close at hand, the survivors don't know whether to believe Charlie's final message that the people claiming to liberate them are not who they seem to be.

The survivors begin to question the intentions of their supposed rescuers when four strangers arrive on the island.

Locke's hostage may be the key to getting off the island, so Sayid and Kate go in search of their fellow castaway in an attempt to negotiate a peaceful deal. A Sayid-centric episode.

Kate's need to get information out of the hostage may jeopardise her standing with Locke -- as well as with Sawyer. A Kate-centric episode.

Sayid and Desmond hit a bit of turbulence on the way to the freighter, which causes Desmond to experience some unexpected side effects. A Desmond-centric episode.

Juliet receives an unwelcome visit from someone from her past and is given orders to track down Charlotte and Faraday in order to stop them from completing their mission -- by any means necessary. Meanwhile, Ben offers Locke an enticing deal. A Juliet-centric episode.

Juliet is forced to reveal some startling news to Jin when Sun threatens to move to Locke's camp. Meanwhile, Sayid and Desmond begin to get a.n idea of the freighter crew's mission when they meet the ship's captain. A Jin/Sun-centric episode.

Sayid confronts Ben's spy on the freighter, and Ben urges daughter Alex to flee Locke's camp in order to survive an impending attack. A Michael-centric episode.

Locke's camp comes under attack, and Jack tries to discover the identity of a body that has washed ashore. A Ben-centric episode.

When Jack's health is seriously compromised, Kate and Juliet must learn to work together in order to save him; and something goes wrong as Sawyer, Claire, Aaron and Miles continue their trek away from Locke's camp and back to the beach.

Locke is enlightened as to the whereabouts of Jacob's cabin, and life aboard the freighter becomes perilous.

The face-off between the survivors and the freighter people begins.

The face-off between the survivors and the freighter people continues, and the Oceanic Six find themselves closer to rescue.

As the face-off between the survivors and the freighter people continues, the Oceanic Six find themselves closer to rescue.