Season 4 - Episode Guide

Feeling that their rescue is close at hand, the survivors don't know whether to believe Charlie's final message that the people on the boat are not who they claim 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.

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

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

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.

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 an idea of the freighter crew's mission when they meet the ship's Captain.

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.

Ben is forced to make a choice as Keamy and his team launch their attack on the Barracks, while a body washes ashore at the beach.

Kate and Juliet must learn to work together when Jack's health is seriously compromised. 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.

ABC once again invites new and avid "Lost" viewers to take another look at one of the most talked about and critically acclaimed shows. "LOST: Past, Present & Future" will explore the series in a way that will bring new viewers up to date -- but which current viewers will also find illuminating - in anticipation of the fourth season premiere episode. The special will take an in-depth look at the mysteries of both the island and its inhabitants and recap the secrets that have been revealed, as well as those that remain unanswered. "