13 episodesFirst aired 31 January 2008
Picking up from the shocking Season 3 finale, learn via "flash forwards" who from Oceanic Airlines flight 815 gets off the island.
E1Jan 200843m
They thought they had met the enemy. They thought they had seen evil. They thought wrong. As the new season begins, the survivors feel that rescue is close at hand, but they don't know whether or not to believe Charlie's final message that the people claiming to liberate them are not who they seem to be. As unlikely alliances are formed, those they thought could be trusted may turn against them, as the enemy of their enemy becomes their friend. But who can be trusted? Is rescue really as close as it seems?
E2Feb 200843m
The survivors begin to question the intentions of their supposed rescuers when four strangers arrive on the island.
E3Feb 200843m
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.
E4Feb 200843m
Kate needs to get information out of the hostages, but it may jeopardize her standing with Locke -- as well as with Sawyer. Meanwhile in the future Kate's Court hearings take place.
E5Feb 200843m
Sayid and Desmond hit a bit of turbulence on the way to the freighter, which causes Desmond to experience some unexpected side effects.
E6Mar 200843m
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.
E7Mar 200843m
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's crew when they meet the ship's captain.
E8Mar 200843m
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.
E9Apr 200843m
Jack tries to discover the identity of a body that has washed ashore. Meanwhile, Locke's camp is attacked by Ben's adversaries.
E10May 200843m
Kate and Juliet must learn to work together when Jack's health is seriously compromised, and something goes wrong as Sawyer, Claire, Aaron and Miles continue their trek away from Locke's camp and back to the beach
E11May 200843m
Locke finds out where Jacob's cabin is. Life on the freighter becomes dangerous.
E12May 200843m
Sayid goes back to the island to bring the rest of the people to the freighter. Ben, Locke, and Hurley go to another Dharma station in order to "move the island".
E13May 20081h 25m
The face-off between the survivors and the freighter people continues, and the Oceanic Six find themselves closer to rescue.