Lost

The battle lines are drawn as Locke puts his plan into action, which could finally liberate him from the island.

Locke carries on with his plan while Jack's group searches for Desmond.

The story behind Jacob and the Man in Black is revealed.

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

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

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

Desmond wakes up and discovers he has returned to the island.

Sun and Jin desperately continue searching for each other. Meanwhile, Locke confronts his enemy.

Richard Alpert faces a difficult choice.

Josh Holloway discusses Sawyer as cop James Ford in his flash-sideways.

Locke trusts Sawyer with a mission.

Executive Producers Damon Lindelof & Carlton Cuse answer a fan question about "Vincent."

Ben deals with the consequences of an uncovered lie.

Sayid faces a difficult decision, and Claire sends a warning to the temple inhabitants.

Hurley must convince Jack to accompany him on a mission, and Jin comes across an old acquaintance.

Locke goes in search of aid to further help his cause.

Kate finds herself on the run, while Jack is tasked with something that could put a friend's life at risk.

The aftermath from Juliet's detonation of the hydrogen bomb is revealed.

Daniel Roebuck makes an appearance, asking Hugo how he came to buy Cluck's Chicken corporation. Sawyer is not impressed and tells Hugo to watch his back.

The aftermath from Juliet's detonation of the hydrogen bomb is revealed.

Matthew Fox talks about the evolution of Jack this season.

On the 100th episode milestone for the series, the time of reckoning has begun when Daniel Faraday comes clean regarding what he knows about the island.

To atone for sins of the past, Ben must attempt to summon the smoke monster in order to be judged.

Kate, Sawyer and Juliet try to save Ben. Kate starts to tell the truth about the lie in order to keep Aaron from harm.

Everyone on the island is at risk when one of the survivors decides to go against them and take matters into their own hands.

After meeting old acquaintances Sawyer is forced to continue lying to protect them.