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Jack's decision to put a plan in action in order to set things right on the island is met with some strong resistance by those close to him, and Locke assigns Ben a difficult task.

Jack's decision to put a plan in action in order to set things right on the island is met with some strong resistance by those close to him, and Locke assigns Ben a difficult task.

Jack and Kate are at odds over the direction to take to save their fellow island survivors, and Locke further solidifies his stance as leader of the Others and Sawyer and Juliet come under scrutiny from the Dharma Initiative.

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.

Suspicions about a possible breach intensify after Ben is taken from the infirmary, and a reluctant Miles is forced to work with Hurley when he's asked to deliver an important package to a top Dharma official.

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

Kate goes to extreme measures to save Ben's life when Jack refuses to help. Meanwhile, Kate begins to tell the truth about the lie in order to protect Aaron.

Things begin to unravel when one of the survivors goes rogue and takes matters into their own hands -- risking the lives of everyone on the island

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

Sawyer perpetrates a lie to protect the remaining survivors from the mistakes of the past.

Locke's fateful mission off the island as Jeremy Bentham is revealed.

The way back to the island is revealed to members of the Oceanic 6, but there's trouble ahead when not all of them wish to return.

Locke takes on the burden to stop the island's increasingly violent shifts through time. Meanwhile, Ben hits a roadblock in his attempt to reunite the Oceanic 6.

Kate discovers that someone knows the secret of Aaron's true parental lineage. Meanwhile, the dramatic shifts through time are placing the lives of the remaining island survivors in extreme peril.

Desmond goes in search of a woman who could be the key to helping Faraday stop the island's erratic movements through time, and Locke discovers the identity of the unknown forces who have been attacking the survivors.

Hurley and Sayid are hunted down by the cops. Jack and Ben try to bring everyone together as a team. Kate receives help from an old friend to hide the truth.

Several of the Oceanic Six survivors come to grips with their need to return to the island... on their own terms.

A recap of the series' first four seasons explores the island's mysteries and profiles its inhabitants, with a focus on those who were rescued, the Oceanic 6 (Jack, Kate, Hurley, Sayid, Sun and Claire's son, Aaron). The hour also speculates on reasons for Charles Widmore's interest in the island, as well as Ben's motives.

The face-off between the survivors and the freighter people continues, and the Oceanic Six find themselves closer to rescue.

The face-off between the survivors and the freighter people continues, and the Oceanic Six find themselves closer to rescue.

The face-off between the survivors and the freighter people begins.

Locke is enlightened as to the whereabouts of Jacob's cabin, and life aboard the freighter becomes perilous.

When Jack's health is seriously compromised, Kate and Juliet must learn to work together in order to save him; and something goes wrong as Sawyer, Claire, Aaron and Miles continue their trek away from Locke's camp and back to the beach.

Locke's camp comes under attack, and Jack tries to discover the identity of a body that has washed ashore.

A Ben-centric episode.

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.

A Michael-centric episode.

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 a.n idea of the freighter crew's mission when they meet the ship's captain.

A Jin/Sun-centric episode.

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.

A Juliet-centric episode.

Sayid and Desmond hit a bit of turbulence on the way to the freighter, which causes Desmond to experience some unexpected side effects.

A Desmond-centric episode.

Kate's need to get information out of the hostage may jeopardise her standing with Locke -- as well as with Sawyer.

A Kate-centric episode.

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.

A Sayid-centric episode.

The survivors begin to question the intentions of their supposed rescuers when four strangers arrive on the island.

Feeling that their rescue is close at hand, the survivors don't know whether to believe Charlie's final message that the people claiming to liberate them are not who they seem to be.

Jack and the castaways begin their efforts to make contact with Naomi's rescue ship.

A Jack-centric episode.

Jack and the castaways begin their efforts to make contact with Naomi's rescue ship.

A Jack-centric episode.

While Jack devises a plan to do away with "The Others" once and for all, Sayid uncovers a flaw in "The Others'" system that could lead to everyone's rescue. But it requires Charlie to take on a dangerous task that may make Desmond's premonition come true.

A Charlie-centric episode.

Ben begrudgingly begins to introduce Locke to the secrets of the island, beginning with the mysterious Jacob. Meanwhile, Juliet's secret goes public.

A Ben-centric episode.

A newly focused Locke breaks away from "The Others" in an attempt to persuade Sawyer to help rid them of a great nemesis that has caused nothing but pain in both of their lives. Meanwhile, a new island inhabitant discloses some shocking information about Oceanic Flight 815.

A Locke-centric episode.

After discovering that all of "The Others'" pregnant women died before giving birth on the island, an extremely reticent Sun allows Juliet to examine her -- and uncovers the identity of the unborn child's father. Meanwhile, Desmond allows an unlikely nemesis to help save the life of a new, mysterious island inhabitant.

A Jin/Sun-centric episode.

Desmond coaxes Charlie, Hurley and Jin on a trek across the jungle after experiencing one of his future-prophesizing "flashes" -- but is he purposely placing Charlie's life in harm's way? Meanwhile, Kate turns to an unwitting Sawyer after seeing Jack alone with Juliet.

A Desmond-centric episode.

Jack's joyous reunion with his fellow survivors is cut short when they realize that accompanying him is one of The Others, and Claire is stricken by a mysterious, life-threatening illness.

A Juliet-centric episode.

After discovering that one of her own has betrayed her to The Others, Kate is left to fend for herself in the jungle with Juliet. Meanwhile, Hurley warns Sawyer to change his selfish ways and make amends with his fellow survivors or he may face a vote of banishment.

A Kate-centric episode.

Hurley begins to suspect that Sawyer may be involved in an island mystery surrounding two fellow survivors, and Sun learns the truth about her past kidnapping attempt by The Others.

A Nikki/Paulo-centric episode.

Ben tries to persuade a determined Locke to call off his destructive plan by offering him some of the secrets of the island, and Kate's reunion with Jack does not go off as planned when she discovers that he has made a deal with The Others.

A Locke-centric episode.

Claire becomes suspicious of Charlie when he exhibits peculiar behavior after she comes up with an idea that could get everybody rescued. Meanwhile, tensions mount between Sayid and Locke as they continue their trek to rescue Jack.

A Claire-centric episode.

Locke, Sayid and Kate investigate a strange structure and its mysterious inhabitant. Meanwhile, Sawyer competes in a ping-pong competition to get back his belongings.

A Sayid-centric episode.

Hurley's discovery of an old, wrecked car on the island leads him on a mission of hope not only for himself, but for a fellow survivor in need of some faith. Meanwhile, Kate and Sawyer reunite with their fellow castaways, but Kate is still torn about leaving Jack behind with "The Others."

A Hurley-centric episode.

A power play ensues between Jack and "The Others" as Juliet's future hangs in the balance. Meanwhile, Kate, Sawyer and Karl continue on their journey away from "Alcatraz".

A Jack-centric episode.

A suspicious and determined Hurley enlists Charlie to help him wrangle the truth out of Desmond, who has been acting strangely ever since the implosion of the hatch.

A Desmond-centric episode.

This episode continues exactly where the last one finished. Ben’s life is now in Jack's hands. Jack wastes no time using this to his advantage by helping Kate and Sawyer to escape. What perils lie ahead for Kate and Sawyer? Could they find unexpected help from one of the Others? We also get the opportunity to learn more about Juliet and her past. Charlie and Hurley go through Sawyer's personal belongings and food stash back at the beach and Charlie finds himself under attack by Desmond.

A Juliet-centric episode.

Kate feels helpless when it looks like Pickett is going to make good on his threat to kill Sawyer, Locke uncovers a piece of information that will change everything he knows about the island, and Jack makes a decision regarding Ben's offer.

A Kate-centric episode.

As Eko recovers from his injuries, several of the other survivors head toward the Pearl Station in order to find a computer they can use to locate Jack, Kate and Sawyer. Meanwhile, when two of the Others take sides against each other, Jack must decide which of them to trust.

An Eko-centric episode.

Sawyer learns just how far the Others will go to keep he and Kate from escaping their captors and returning to the South Beach. Meanwhile, Jack is pressed into service to save the life of an Other, and questions arise in the South as Desmond begins building a mysterious device.

A Sawyer-centric episode.

The fates of Locke, Eko and Desmond are revealed after the implosion of the hatch, while Hurley returns to the beach camp to tell the tale of what happened when he, Jack, Kate and Sawyer encountered "The Others." Meanwhile, Claire is shocked to find Nikki and Paulo in Jack's tent.

A Locke-centric episode.

Sayid's plan to locate Jack places Sun and Jin's lives in grave danger. Meanwhile, Kate and Sawyer are forced to work in harsh conditions by their captors, and Henry makes a very tempting offer to Jack that may prove difficult to refuse.

A Jin/Sun-centric episode.

Jack, Kate and Sawyer begin to discover what they are up against as prisoners of The Others.

A Jack-centric episode.

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 cataclysmic decision regarding the "button" and the hatch.

Desmond's return to the island opens up a whole box of revelations---particularly about life prior to his "race" and what went on during his three years inside the Swan Hatch. Meanwhile, Jack, Kate, Sawyer and Hurley go off toward the Others in search of Walt as Sayid, Sun and Jin begin reconnaissance of the north shore.

As Locke and Eko battle over the "108 minute" button, Desmond comes to a startling conclusion about the crash of Flight 815 and the purpose of the Swan Hatch. In the jungle, Michael's betrayal is revealed as Jack, Kate, Sawyer and Hurley are taken captive by the Others, and Sayid discovers the truth about the north shore camp.

A Desmond-centric episode.

A determined Michael convinces Jack and several castaways to help him rescue Walt from the Others. Meanwhile, Charlie struggles with Eko's decision to discontinue building the church.

A Michael-centric episode.

Mr. Eko enlists Locke to help find a secret location he believes houses answers to the island's mysteries. Meanwhile, Jack and the other survivors struggle to cope with the horrific situation in the hatch.

An Eko-centric episode.

Jack and Kate bring an exhausted Michael back to the camp, and with him, news about "The Others." Meanwhile, Ana Lucia attempts to get the prisoner to confess, and Hurley plans a surprise date for Libby.

An Ana Lucia-centric episode.

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 Others; and Locke begins to question his faith in the island.

A Rose/Bernard-centric episode.

Libby lends Hurley support when he begins to think the island is having a strange effect on him, and Locke’s sense of purpose is shaken when the prisoner provides new information about the hatch.

A Hurley-centric episode.

When the hatch suddenly takes on a life of its own, Locke is forced to enlist the help of an unlikely ally. Meanwhile, Ana Lucia, Sayid and Charlie go off into the jungle to find out the truth about Henry.

A Locke-centric episode.

Sun wrestles with the thought of telling Jin a newfound secret that threatens to upset the entire balance of the survivors’ community. Meanwhile, Locke enlists Ana Lucia to interrogate the prisoner in order to extract more information than he, Jack or Sayid could.

A Jin & Sun-centric episode.

Aaron suddenly becomes very ill, and a desperate Claire, along with Kate and Rousseau, attempts a return to the scene of her kidnapping where she believes she might find the cure for baby Aaron’s mysterious illness. Meanwhile, Jack and Locke must keep their prisoner a secret from the rest of the survivors.

A Claire-centric episode.

When Rousseau leads Sayid to a mysterious captive in the jungle, he becomes determined to find out if he is one of the “Others.” Meanwhile, Sawyer discovers Hurley’s potentially devastating breach of the survivors’ trust and blackmails him into helping track an elusive island creature that won’t leave Sawyer alone.

A Sayid-centric episode.

Survivors fear that “The Others” may have returned when Sun is injured during a failed kidnapping attempt. Meanwhile, Sawyer is an amused but highly interested bystander when tension escalates between Jack, Locke, Kate and Ana Lucia.

A Sawyer-centric episode.

When Charlie’s vividly surreal dreams lead him to believe Claire’s baby, Aaron, is in danger, Locke suspects Charlie may be using drugs again. Meanwhile, Sawyer encourages Hurley to act on his attraction to Libby. Flashbacks will feature 8-year-old Charlie and 12-year-old Liam.

A Charlie-centric episode.

Jack, Locke and Sawyer pursue 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 search party, and Hurley and Charlie commiserate over the age-old conundrum of "what women want."

A Jack-centric episode.

We learn more about the mysterious Mr. Eko as he interrogates Charlie about the Virgin Mary statue, Claire begins to lose faith in Charlie when she discovers his secret, and Jack is an interested observer when Kate gives the recovering Sawyer a much-needed haircut.

A Mr. Eko-centric episode.

Kate’s original crime that started her life on the run is revealed. The survivors lay Shannon to rest whilst Kate sleeplessly watches over a feverish Sawyer, leading her to question her sanity. Mr. Eko has a surprise for Locke regarding the hatch and Michael takes a closer look at the mainframe system.

A Kate-centric episode.

Tempers flare when Ana Lucia and her group stumble upon Sayid and the other castaways.

An Ana Lucia-centric episode.

The first 48 days in the lives of the tail section survivors are revealed.

Note: This episode is running 5 minutes longer than normal, making it end at 10:05

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. Also, Shannon's shocking past of her former marriage as well as her manipulation of people prior to the crash are revealed. Plus, there is the revelation on the death of Shannon's father who ended up in the hospital where Jack worked. Lastly, Charlie becomes jealous of Locke's interest in Claire.

A Shannon-centric episode.

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 searches for her missing wedding ring.

A Jin/Sun-centric episode.

Hurley struggles with an assigned task inside the hatch. Sawyer, Michael and Jin learn the identities of their captors. Claire uncovers a startling piece of information about the fate of the raft.

A Hurley-centric episode.

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."

A Locke-centric episode.

With the abduction of Walt fresh on their minds and their raft destroyed, Michael and Sawyer fight for their lives and discover a new predator in the roiling ocean. Meanwhile on land, Locke must descend into the hatch when one castaway goes missing inside.

A Michael-centric episode.

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

A Jack-centric episode.

The castaways who make it onto the raft are surprised at sea by something that unexpectedly happens -- they make their first contact with "others" out at sea, but meet disastrous results. Meanwhile, remaining islanders attempt to blow open the hatch that's in the forest, but this proves to be more difficult than expected. Another survivor on the island dies. Visiting French woman Danielle Rousseau becomes a threat to Claire's infant son as she decides to kidnap him and bring him into the woods for "the others" to have in order to save the rest. Lastly, flashbacks show us all the survivors in the moments before the doomed flight took off.

The French woman -- Danielle Rousseau -- 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 precedes them. Meanwhile, Michael and Jin ready the raft for sailing. Danielle takes Jack, Locke, Kate, Hurley, and Arzt on a trek to the Black Rock. However, once they reach the "Dark Territory," Arzt (who had previously gone back to camp) comes running with the real Beast hot on his heels. Fortunately, Locke's calm demeanor seems to ease the "security system," as Danielle calls it, and it heads in the other direction. They eventually reach the Black Rock, which turns out to be a wooden ship. Black smoke is an ominous sign as the raft sets sail after an accidental delay. Jin and Sun make up, and Walt decides to give the dog Vincent to Shannon since there is no room on the boat. Black smoke continues to rise.

Jack suspects foul play when Michael becomes violently ill while building the raft. Suspects include Sawyer and Kate, who compete for the last seat on the raft and do anything possible to prevent each other from getting it. Meanwhile, a secret from Kate's past is revealed to the other survivors on the island -- she is a runaway fugitive. The mysterious hatch is shown to Jack, who sides with Locke over Sayid in favor of opening it. Walt warns Locke not to open the hatch. Walt also admits to his father Michael that he burned the raft the first time, and changes his mind about leaving the island once he realizes Locke's plan for the hatch. Lastly, flashbacks of Kate's past reveal happier times with the "love of her life," Tom, prior to his death and a visit to her ill mother.

A Kate-centric episode.

Jack goes after Locke for lying about Boone's accident whilst Shannon enlists the help of Sayid to avenge her brother's alleged murder. In Sayid's flashback, the CIA convince him to help them catch a suicide bomber.

A Sayid-centric episode.

Jack tends to a severely wounded Boone after Locke returns him to the caves. Sun gives Jack some much-needed medical assistance and Sayid presents Shannon with a grand romantic surprise when they're alone. Claire unexpectedly goes into labor in the forest, Jack is unable to deliver the baby, and Kate, Charlie and Jin go into panic mode when they must tend to Claire themselves. Having returned Boone to Jack, Locke disappears back into the forest amid the chaos.

A Jack-centric episode.

Locke thinks he's being sent a sign on how to get the hatch open, and he and Boone venture inland. Locke begins to have difficulties with walking as he and Boone try to find a way into the hatch. Jack is reluctant to offer assistance when Sawyer begins to experience excruciating headaches and needs glasses. In this episode we learn more about Locke's shocking and tragic encounter with his scheming biological parents. Lastly, as Locke confronts his troubled past and struggles to open the hatch, Boone is seriously injured after an accident involving a plane that the pair found in the forest.

A Locke-centric episode.

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, which is later revealed to be a cradle for Claire's baby. Hurley flashes back to the hugely life-altering experience he had before boarding the plane. He wins the lottery - the number-one thing Americans dream about - but it ends up being the worst thing that could have happened to him. The winning numbers, and their source, were apparently cursed and have brought harm to everyone Hurley loves. We learn some of the spooky story behind the numbers and their connection to the island.

A Hurley-centric episode.

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 fellow survivors with a surprising revelation, and Boone gives Sayid a warning about his step-sister Shannon. Lastly, more details of Jin and Sun's troubled marriage are revealed through flashbacks.

A Jin/Sun-centric episode.

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 and killing Ethan with 6 bullets to the chest. A shocking prior connection between Sawyer and Jack is revealed in a flashback which shows Sawyer meeting Jack's father in a bar.

A Sawyer-centric episode.

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 mysterious Ethan, who threatens to kill off the other survivors one by one unless Claire is returned to him. Meanwhile, the disappointment Charlie feels when Claire does not remember him triggers recollections of a woman he had let down in the past.

A Charlie-centric episode.

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 Shannon to help decipher the French woman's map.

A Michael/Walt-centric episode.

When Locke learns that Boone wants to share their "secret" with Shannon, Locke decides to teach him a lesson. This leads to Shannon's life being placed in what seems like peril. Boone and Shannon's dark past is revealed in a shocking backstory that recalls their relationship right before the plane crash and presages the return of the beast. Kate, who has become a confidante to the soft-spoken Sun, is puzzled by Sun's mysterious behavior and the revelation that she can speak English. A hungry Hurley must convince Jin to share his fish by making up for offending Jin by rejecting his offer of raw fish early on, or he'll continue to suffer digestive problems from the limited island diet.

A Boone/Shannon-centric episode.

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 he took from the French woman. A rising tide threatens to engulf the fuselage and the entire beach encampment, and Rose and a grieving Charlie tentatively bond over Claire's baffling kidnapping.

A Kate-centric episode.

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, who, it was recently discovered, was not a passenger on the doomed flight. Jack battles inner demons relating to his father, while Boone and Locke discover another island mystery.

A Jack-centric episode.

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 convinced her to take the ill-fated flight that landed her on the island. Hurley is shocked and confused when he discovers that Ethan Rom, another plane crash survivor, does not appear on the flight manifest.

A Claire-centric episode.

Sayid's life is placed in grave danger after he stumbles upon the source of the mysterious French transmission, the woman Danielle Rousseau. She was on the distress call and is found alive. Meanwhile, Hurley has a ridiculous plan to make life on the island a little more civilized. The plan involves golf clubs he finds in the debris, and it looks like it just might work. Lastly, we flash back to Sayid's childhood friend Nadia as well as his participation in hostage situations in Iraq.

A Sayid-centric episode.

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 of the inhalers. In flashback we hear Sawyer's story and find he is not who he says he is.

A Sawyer-centric episode.

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 alive in a cave collapse, and someone might be secretly thwarting Sayid, Kate, and Boone when they enact a plan to find the source of the French transmission.

A Charlie-centric episode.

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 survivors should camp -- on the beach, where they're more likely to be seen, or in a remote inland valley where fresh water abounds; and Locke discovers Charlie's secret.

A Jin/Sun-centric episode.

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 trying to save a woman who went out swimming. A pregnant Claire's health takes a bad turn from lack of fluids, and a thief may have stolen the last bottles of water. Veronica Hamel guest-stars as Jack's mother, Margo. Also, Jack (Matthew Fox) flashes back at 12 years old, to find himself on the playground in an altercation with a bully, who ultimately beats him up, and later learns a life lesson from his father.

A Jack-centric episode.

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 shocking secret about Locke is revealed. On the hunt for food someone is injured. Meanwhile, some survivors are horrified by Jack's plan for the dead bodies still scattered among the wreckage -- he wants to burn them. Jack sees someone that's not there, and we find out that one of the survivors was not able to walk but now he can.

A Locke-centric episode.

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 they have begun to uncover and worry that telling the other survivors will cause panic. They decide to lie for the time being. Also, Locke's befriending of Walt disturbs Michael, but Walt is more concerned in finding his dog. Lastly, Kate flashes back to when she was arrested by the Marshal in Australia.

A Kate-centric episode.

Having escaped the "creature" and retrieved the plane transceiver, a group of the survivors journey to higher ground so they can transmit a signal. On route, they receive a mysterious transmission and encounter another of the island's inhabitants. Meanwhile, back at camp, Jack tends to a wounded man who reveals a secret about Kate.

Stripped of everything, the 48 survivors scavenge what they can from the plane for their survival. Some panic. Some pin their hopes on rescue. A few find inner strength they never knew they had—like Kate who, with no medical training, suddenly finds herself suturing the doctor's wounds. The band of friends, family, enemies and strangers must work together against the cruel weather and harsh terrain. But the intense howls of the mysterious creatures stalking the jungle fill them all with fear. Fortunately, thanks to the calm leadership of quick-thinking Jack and level-headed Kate, they have hope. But even heroes have secrets, as the survivors will come to learn.