Locke confronts Ben and demands that Ben take him to Jacob. Ben complies, but the answers Locke receives are not what he expected. Ben remembers his childhood on the Island, revealing the history of the Dharma Initiative and how the Others ...

After abandoning the Others, Locke takes Sawyer on a trek through the jungle to help him eliminate a common enemy. Meanwhile, back at the beach, the parachutist Naomi has crucial information about flight 815.

Sun learns what happens to pregnant women on the island. Juliet takes her to the Staff in order to learn the baby's D.O.C. (Date of Conception). Sun recalls how she learned about Jin's parents. Meanwhile, the woman who dropped fro...

Desmond convinces Hurley, Jin, and Charlie to follow him on a trek through the jungle after he receives a series of visions. Flashbacks reveal the time that Desmond spent with a cloister of monks. Meanwhile, a despondent Kate turns to Sawye...

Jack returns, but no one is in the mood for celebrating when they see that Juliet has come back with him. As Juliet struggles to find a way to be accepted, flashbacks show how she came to the island and what she was doing during those three...

The Others are vacating their home, and one of the castaways is leaving with them. Kate is knocked out and wakes up in the jungle handcuffed to Juliet. Kate is determined to return to get Jack, while Juliet believes she has been abandoned. ...

When both Nikki and Paulo apparently die, the rest of the castaways try to figure out what happened to them. In the course of the investigation, the truth about Sun's "kidnapping" comes to light. Flashbacks show what Nikki an...

When Kate and Locke arrive at the Others' camp, Ben promises to tell Locke the island's secrets as long as he stops his destructive plan, and Kate's reunion with Jack doesn't go very well when she learns that the Others ...

Claire has an idea to send a message to the outside world. Charlie, however, is resistant to the idea, and Desmond tries to sabotage the plan. As Claire tries to get the truth behind their actions out of the pair, she remembers traumatic ev...

On their mission to rescue Jack, Kate, Sayid, and Locke stumble upon a mysterious structure surrounded by farm animals and meet its strange inhabitant. Back at the camp, in order to reclaim his belongings, Sawyer plays in a ping-pong compet...

Kate is still struggling over their Decemberision to leave Jack in the hands of the Others as she and Sawyer return to their camp. Meanwhile, Hurley finds an old van in the jungle and attempts to use it to help a fellow survivor in need of ...

As Kate and Sawyer journey back to the main island with Karl, who is exhibiting effects of the brainwashing video, they argue over whether to go back and save Jack. On Hydra island, as Juliet's fate rests in his hands and a power strug...

After Desmond rescues Claire from drowning, Charlie gets Hurley to help him find out why Desmond has seemed able to predict the future. Desmond recalls exactly what took place in the moments after he turns the key, where he experienced a st...

Jack has the Others in a desperate situation as he holds Ben's life in his hands. Meanwhile, Kate and Sawyer try to escape from their captors. Flashbacks reveal Juliet's past as a medical researcher in Miami.

Jack makes a Decemberision regarding Ben's offer. Sawyer's life is placed in danger when Pickett Decemberides to make good on his threat. Locke discovers a hidden message that may help unlock the island's secrets. Kate recall...

A delirious Eko wrestles with past demons; some of the castaways go to the Pearl station to find a computer they can use to locate Jack, Kate and Sawyer; Jack does not know who to trust when two of the Others are at odds with each other.