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Summary: Hurley agonizes over what the group should do next, and Locke is curious about the new arrival to his camp.
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Summary: Desmond wakes up to discover he's back on the island.
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Summary: Sun and Jin desperately continue their search for one another, and Locke confronts his enemy.
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Summary: Richard Alpert faces a difficult choice.
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Summary: Locke tasks Sawyer with a mission.
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Summary: Ben deals with the consequences of an uncovered lie.
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Summary: Sayid faces a difficult decision; Claire sends a warning to the temple inhabitants.
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Summary: The face-off between the survivors and the freighter people continues, and the Oceanic Six find themselves closer to rescue.
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Summary: The face-off between the survivors and the freighter people continues, and the Oceanic Six find themselves closer to rescue.
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Summary: 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".
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Summary: Locke finds out where Jacob's cabin is. Life on the freighter becomes dangerous.
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Summary: 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...
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Summary: Jack tries to discover the identity of a body that has washed ashore. Meanwhile, Locke's camp is attacked by Ben's adversaries.
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Summary: 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.
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Summary: 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.
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Summary: 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, B...
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Summary: Sayid and Desmond hit a bit of turbulence on the way to the freighter, which causes Desmond to experience some unexpected side effects.
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Summary: The survivors begin to question the intentions of their supposed rescuers when four strangers arrive on the island. Are they here to liberate them? Will they become enemies?
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Summary: 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
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Summary: The survivors begin to question the intentions of their supposed rescuers when four strangers arrive on the island. Are they here to liberate them? Will they become enemies?
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Summary: They thought they had met the enemy. They thought they had seen evil. They thought wrong. As the new season begins, the feeling that rescue is close at hand, the survivors don't know whether or not to believe ...
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Summary: Ben confronts Jack, claiming that Naomi is not who she seems. Meanwhile, Sawyer and Juliet try to come up with a plan to rescue the hostages at the beach.Inside the Looking Glass, Charlie and Desmond struggle ...
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Summary: The ambush for the Others goes awry and ends with Sayid, Jin, and Bernard getting captured.Ben is informed of Charlie's presence in the Looking Glass station and sends Mikhail to "clean up" the situation.He th...
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Summary: Charlie makes a list of the best moments of his life. Once again, Desmond has foreseen his death, but this time Charlie decides to face it head on. Jack devises a plan to fight back when the Others arrive, but...
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Summary: 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...
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Summary: 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.
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Summary: 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 ...
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Summary: 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...
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Summary: 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 s...
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Summary: 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 be...
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Summary: 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 sh...
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Summary: 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 ...
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Summary: 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 p...
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Summary: 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, Saw...
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Summary: 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 hel...
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Summary: 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 h...
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Summary: 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...
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Summary: 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.
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Summary: 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 secr...
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Summary: 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 ...
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Summary: The Others prevent Sawyer and Kate from escaping, leaving Sawyer perplexed by the extent of the measures taken to keep them imprisoned. Jack is asked to use his medical training to save the life of one of the ...
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Summary: Locke, Eko and Desmond are found scattered about the island after the implosion of the hatch. Locke receives a message from the Island asking him to fix the situation he caused.Hurley returns to the beach camp...
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Summary: Sun and Jin's lives are put in danger when Sayid tries to locate Jack and the other missing castaways. Sayid also creates a plan in order to get the attention of the "Others" on the beach. Meanwhile, Henry (i....
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Summary: Jack, Kate, and Sawyer are prisoners of the mysterious "Others." After their captors drug them and take blood samples, they are held in Septemberarate areas. The camp leaders--Ben (Henry Gale), Mr. Friendly an...
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Summary: After discovering something odd just offshore, Jack and Sayid come up with a plan to confront "The Others" and hopefully get Walt back. Meanwhile, Eko and Locke come to blows as Locke makes a potentially catac...
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Summary: A determined Michael convinces Jack and several castaways to help him rescue Walt from "The Others." With Jack away, Locke is left in charge of the hatch and must decide if he should believe Henry and not push...
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Summary: Mr. Eko enlist Locke to help find a secret location he believes houses answers of the Island's mysteries. Meanwhile, Jack, Sawyer, and Kate struggle to cope with the horrific situation in the hatch following t...
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Summary: After finding an exhausted Michael in the forest, Jack and Kate bring him back to the main camp. When he finally wakes up, Michael has some new details about "The Others." Also, a lovestruck Hurley plans a dat...
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Summary: Rose is surprisingly and vehemently opposed to Bernard's plan to create an S.O.S. signal; romantic sparks are rekindled between Jack and Kate when they trek into the jungle to propose a "trade" with "The Other...
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Summary: Libby lends a helping hand to Hurley to support him when he begins to think the island is having a strange effect on him. Hurley begins to see Dave (guest-star Evan Handler) on the island, who was his friend i...
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Summary: When the hatch suddenly takes on a life of its own, Locke is forced to enlist the help of an unlikely ally to control the matter. Meanwhile, Ana Lucia, Sayid and Charlie go off into the jungle to find out the ...
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Summary: Sun comes to the realization that she might be pregnant. She struggles on whether to tell Jin about the situation. Meanwhile, with no success from Jack or Sayid, Ana-Lucia is called in by Locke to interrogate ...
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Summary: A mysterious illness that baby Aaron suddenly contracts sends a desperate Claire, Kate and French woman Danielle to return to the same area where Claire was initially kidnapped. It is there where she believes ...
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Summary: After Sun is attacked, some of the survivors begin to think that one of the "other survivors" might be one of "The Others." When French woman Danielle Rousseau leads Sayid to a mysterious captive in the jungle...
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Summary: Some of the island survivors fear that "The Others" may have returned when Sun is greatly injured during a failed kidnapping attempt at her plant garden. Also, the trust barrier becomes very thin between Locke...
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Summary: When Charlie's vividly surreal dreams lead him to believe Claire's baby, Aaron, is in danger, Locke suspects Charlie may be using again. Meanwhile, Sawyer encourages Hurley to act on his attraction to Libby.
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Summary: Jack, Locke and Sawyer follow after a determined Michael after he heads into the jungle toward the dreaded "Others" in search of Walt. Meanwhile, Sun has a surprising reaction to Jin's desire to join the searc...
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Summary: This episode will shed more light on why Eko took a mysterious 40-day vow of silence, and possibly information on his stick. Also, Claire begins to lose faith in Charlie after Eko begins to question him about ...
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Summary: As Kate's backstory continues, her original crime is revealed. She thinks something is haunting her through Sawyer. Locke and Eko make an interesting discovery about the film, and Michael has a mysterious enco...
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Summary: Violence erupts when Ana Lucia and her group stumble upon Sayid and the other castaways on the island. Ana Lucia holds Sayid captive. Kate and Jack care for Sawyer when Mr. Eko brings him back to the camp hims...
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Summary: The harrowing first 48 days in the lives of the tail section survivors are revealed. Flashbacks reveal the point of view of Ana-Lucia, Mr. Eko, Bernard and Libby and other survivors as they landed on the other...
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Summary: Sawyer's wound becomes life-threatening as he, Michael and Jin make their way through the interior of the island with the tail section survivors. Meanwhile, Shannon is once again haunted by visions of Walt.
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Summary: Michael sets off into the jungle by himself determined to find Walt, but discovers that he is not alone. Meanwhile, Sawyer and Jin are ordered by their captors to take them to their camp, and Sun frantically s...
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Summary: Hurley struggles with an assigned task inside the hatch as he flashbacks to disturbing memories in his life before the crash. Meanwhile, Sawyer, Michael and Jin learn the identities of their captors on the isl...
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Summary: Jack, Locke and Kate learn more secrets about the hatch. Meanwhile, after being beaten and taken captive, Sawyer, Michael and Jin wonder if their captors are fellow survivors or the dreaded "Others." Flashback...
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Summary: With the abduction of Walt fresh on their minds, their raft destroyed, and Jin missing, Michael and Sawyer fight for their lives in the middle of nowhere in the ocean and discover a new predator in the roiling...
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Summary: Jack, Locke and Kate explore the mysterious hatch but Jack decides to wait before going down into the hatch. Kate and Locke aren't so patient. When Shannon chases after Vincent the dog, she encounters a famili...
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Summary: In this two hour season finale, the castaways on the raft run into unexpected trouble. Meanwhile, the remaining islanders attempt to blow open the hatch. Flashbacks continue to show the survivor's final moment...
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Summary: The French woman - Danielle Rousseau (guest star Mira Furlan) ”shocks the survivors by showing up to the camp with a dire warning about "the Others" who are on the island, and the black smoke that precede...
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Summary: Jack suspects foul play when Michael becomes violently ill while building the raft. The suspects include Sawyer and Kate, who compete for the last seat on the raft and do anything possible to prevent each othe...
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Summary: After another funeral, tempers rise as the survivors' suspicions of each other grow, and an unlikely survivor vows revenge. The events that landed Sayid on Flight 815 play out as he engages Locke in a psycholo...
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Summary: Jack tends to a severely wounded Boone after Locke returns him to the caves. In the confusion, Locke slips away to deal with his guilt over the crisis. Meanwhile, Claire unexpectedly goes into labor while deep...
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Summary: Locke thinks he's being sent a sign on how to get the hatch open, and he and Boone venture inland. Jack is reluctant to offer assistance when Sawyer begins to experience excruciating headaches and needs glasse...
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Summary: 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. Hurley flashes back to the hugely life-altering experience he had...
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Summary: When the raft the survivors have been building mysteriously burns down, Michael is convinced that Jin is responsible for the sabotage, which only serves to escalate their rivalry. Meanwhile, Sun stuns her fell...
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Summary: Kate and Sawyer divulge dark secrets to each other while tracking a renegade boar that Sawyer swears is purposely harassing him. Hurley and Sayid worry that Charlie is losing it after facing a brush with death...
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Summary: After the missing Claire returns with no recollection of what has happened since before she boarded the doomed Oceanic flight 815, Jack and Locke formulate a plan of defense against her kidnapper, the mysterio...
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Summary: Violence ensues and a mysterious island beast makes a re-appearance when Michael and Locke clash over Walt's upbringing. Meanwhile, Charlie is tempted to read the missing Claire's diary, and Sayid enlists Shan...
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Summary: When Locke learns that Boone wants to share their "secret" with Shannon, Locke Decemberides to teach him a lesson. This leads to Shannon's life being placed in what seems like peril. Boone and Shannon's dark p...
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Summary: Jack, Kate and Sawyer fight over possession of a newly discovered locked metal briefcase which might contain insights into Kate's mysterious past. Meanwhile, Sayid asks a reluctant Shannon to translate notes h...
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Summary: Survivors wonder why Charlie and Claire have been abducted - and by whom - and a search party ventures into the treacherous jungle to look for the pair. Suspicions focus on Ethan Rom (guest-star William Mapoth...
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Summary: Claire has a horribly realistic nightmare about her new baby being harmed or kidnapped. Flashbacks reveal Claire's backstory: the former boyfriend who got her pregnant, then abandoned her, and the psychic who ...
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Summary: Sayid's life is placed in grave danger after he stumbles upon the source of the mysterious French transmission, the woman Danielle Rousseau (guest-star Mira Furlan). She was on the distress call and is found a...
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Summary: Shannon's inhaler runs out and Boone believes Sawyer has the remaining three in his stash. When Sawyer refuses to give them up, Jack and Sayid resort to torturing Sawyer until he agrees to reveal the location ...
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Summary: Charlie begins a painful journey of withdrawal from drugs, surprisingly aided by Locke, whose true motive for helping Charlie is a mystery. Meanwhile, survivors struggle to find and free Jack when he's buried ...
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Summary: Walt and the others are shocked when Michael is brutally beaten, but only the non-English-speaking Jin and Sun know the truth behind the attack. Meanwhile Kate, Jack, Sawyer and Sayid argue about where the sur...
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Summary: Jack is nearly delirious from lack of sleep and struggles to overcome the haunting events that brought him to Australia and, subsequently, to the island. Meanwhile, Boone gets caught in a treacherous riptide t...
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Summary: The survivors are jolted awake in the middle of the night when wild island beasts (which are wild boars) invade the beach encampment. Kate and Michael join the mysterious Locke on a hunt for food -- and a shoc...
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Summary: Jack and Hurley discover an alarming secret about Kate, as the marshal's life hangs in the balance and he suffers a lot of pain. Meanwhile Kate, Charlie, Sawyer, Sayid, Boone and Shannon ponder the mysteries t...
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Summary: Having escaped the "creature" and retrieved the plane transceiver, a group of the survivors travel to higher ground so they can transmit a signal. En route, they receive a mysterious transmission and encounter...
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Summary: A sudden plane crash leaves at least 48 survivors stranded on a jungle island, forced to scavenge for survival from the wreckage of the plane. As they get their bearings and pin their hopes on a quick rescue, ...
