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During the helicopter ride to the ship, Desmond's consciousness begins jumping back and forth between present day 2004 and 1996. He is forced to find Daniel Faraday in 1996 in order to get answers and stop the jumps.

On the island, Jack and the survivors come closer to finding rescue. In the flashback, Jack is shown in Los Angeles, living though a meaningless existence as a drunkard.

Jack and the survivors wait for Charlie to turn off The Others' signal-jamming device, not knowing that he has been captured at the Looking Glass station.

Jack, Kate, Sawyer, and Hurley are captured by the Others. Michael achieves his goal. Desmond realizes that Locke is wrong about the "button".

After discovering a sailboat just offshore containing Desmond, Jack and Sayid come up with a plan to confront "The Others". Eko and Locke come to blows as Locke makes a potentially cataclysmic decision regarding the "button".

A visitor to the encampment could be a threat to Claire's son.

The castaways on the raft are surprised at sea by something unexpected. Meanwhile, remaining islanders attempt to blow open the hatch, and a visitor to the encampment might be a threat to Claire's infant son.

As Ben takes Locke to see Jacob and reveal the island's secrets, Ben's background on the island is exposed--as well as what happened to the Dharma Initiative.

Ben tries to escape Keamy's custody so that he and Locke can follow through with Jacob's request to move the island. Michael tries to neutralize the explosives on the boat, while the "Oceanic 6" move closer to rescue.

The mysteries behind Richard Alpert's arrival to the island, his immortality, and his alliance with Jacob are revealed--plus more details about the purpose of the island and the relationship between Jacob and the smoke monster.

In the season finale, the Oceanic Six find themselves closer to rescue.

At the site of the ancient statue remains, Locke assigns Ben a difficult task that involves Jacob's fate. Jack is determined to go ahead with Faraday's plan.

One of the castaways is chosen to descend into the mysterious hatch, and Shannon stumbles upon a shockingly familiar face in the jungle.

Forty-eight survivors of an airline flight originating from Australia, bound for the U.S., which crash-lands onto an unknown island 1000 miles off course, struggle to figure out a way to survive while trying to find a way to be rescued.

Having retrieved the plane tranceiver, a group of survivors try to transmit a signal, only to receive a strange transmission from another inhabitant.

After Desmond saves Claire from drowning, Charlie and Hurley suspect that he can see the future, so they come up with a plan to get some answers out of him.

Jack tells Kate that he has made a deal with The Others; Locke hinders Jack's plan to leave the island.

Desmond has another vision of Charlie's death, but this time his death ultimately will result in Claire's rescue. Meanwhile, the survivors discover that an attack by the others is even more imminent than originally expected.

Jack and Sayid's plan faces resistance from Sawyer, Juliet, and Kate. Locke, Richard, Ben, and The Others reach Jacob at the Foot of the Statue.

Locke puts his plan into action, which could liberate him from the island.

Locke thinks he knows how to get the hatch open, and he and Boone venture inland. Jack is reluctant to help Sawyer get glasses.

The French woman arrives at the camp with a dire warning about a group of survivors known as the Others.

When Hurley becomes obsessed with the French woman and heads into the jungle to find her, Jack, Sayid and Charlie have no choice but to follow. Meanwhile, Locke asks Claire to help build a mysterious item.

When the survivors run out of food, Locke, Kate, and Michael go out hunting for boar. Michael gets injured, so he and Kate go back. But Locke stays out hunting, and ends up running into the creature living in the jungle.

When the hatch suddenly takes on a life of its own, Locke is trapped and is forced to enlist the help of an unlikely ally. Jack faces off against Sawyer in a series of poker games for supplies. The truth about Henry is revealed.