Jack, Kate, and Sawyer are prisoners of the mysterious "Others." After their captors drug them and take blood samples, they are held in separate areas. The camp leaders--Ben (Henry Gale), Mr. Friendly and a new woman, Juliet--try to make the castaways adjust to their new circumstances. Flashbacks reveal more about Jack's past with his father and his wife Sarah.

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.e. Ben) gives Jack an offer that is very tempting in exchange for his cooperation. Lastly, Kate and Sawyer must adjust to harsh conditions that are being forced upon them by "The Others."

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 to report the imprisonment of Kate, Jack and Sawyer by the Others. Desmond has been fundamentally altered by the implosion, giving him a mysterious new power.

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 Others. At the beach, Desmond's strange behavior attracts attention. He begins to construct a mysterious device.

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.

Jack makes a decision regarding Ben's offer. Sawyer's life is placed in danger when Pickett decides to make good on his threat. Locke discovers a hidden message that may help unlock the island's secrets. Kate recalls memories from the past, which caused her to make an important choice.

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.

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 strange vision of his life prior to his Army days.

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 struggle within the Others ensues, Jack recollects the time he spent in Phuket, Thailand and his relationship with Achara, a mysterious tattoo artist.

Kate is still struggling over their decision 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 faith and hope. Flashbacks reveal more of Hurley's tumultuous past with the numbers curse.

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 competition.

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 events from her past. Meanwhile, the rescue party encounters a dangerous obstacle.

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 have offered him a deal. More of Locke's troubled past is revealed.

As the truth about Sun's kidnapping by "the Others" comes to her attention, Hurley becomes suspicious of Sawyer's attempt to reveal the mystery behind two fellow survivors, Nikki and Paulo. Through series of flashbacks we will discover what Nikki and Paulo were doing before the crash and how they survived 65 days on the island.

Kate and Juliet are stranded in the jungle after Kate learns that there is a traitor in the survivor's midst. Meanwhile, Sawyer's poor attitude and selfish ways towards the beach community may earn him a vote of banishment if he doesn't have a change of heart.

The celebration of Jack's return is cut short when he arrives at the beach with an Other, Juliet, whose flashbacks pick up from where they left off, showing us how she got onto the island and became an other. Meanwhile, Claire is threatened by a strange illness.

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 Sawyer for companionship after seeing Jack and Juliet together.

Sun allows Juliet to examine her when she learns that all of "The Others" pregnant woman died before they gave birth on the island. Meanwhile, Desmond and an unlikely nemesis collaborate to save a new island inhabitant's life.

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.

Ben unwillingly divulges information to Locke about the island, taking him on a journey to various locations including strange monuments and the mysterious Jacob. Back at the beach, Juliet's secret is revealed. Flashbacks will show us the origins of DHARMA and the history of the island, including 'the purge.'

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.

The season 3 finale finds the castaways preparing for an invasion by the slightly less mysterious Others, while Charlie and Desmond find more than they were looking for in the underwater "Looking Glass Hatch". A Jack-centric episode. Part One of Two.

The season 3 finale finds the castaways preparing for an invasion by the slightly less mysterious Others, while Charlie and Desmond find more than they were looking for in the underwater "Looking Glass Hatch". A Jack-centric episode. Conclusion.

Lost: Missing Pieces are 13 two- to three-minute stories of compelling, new, never-before-seen moments from the hit television show LOST. These newly-created scenes (not deleted scenes from previous episodes) reveal answers and new details about your favorite characters. For each story, we leave it up to the fans to figure out where these pieces fit into the overall mythology. Christian is talking with Jack about his wedding, which is later that day. Christian reveals that his father disapproved of him marrying Margo, and that was the reason he didn't wear the watch given to him by his father on his wedding day. However, he tells Jack that he is doing the right thing marrying Sarah and passes the watch to Jack, who immediately puts it on.

Hurley comes out of Rose's and Bernard's tent. Neil comes up, and ask what he is doing. He looks at the bottle of DHARMA Cabernet that Hurley has dropped, and then asks if Hurley is going to make a move on Libby. He asks because he has his eyes upon her himself. Hurley tells him that he just now has a date with Libby. Neil reluctantly relents and walks away.

Ben and Jack play chess. Ben asks Jack if he would consider staying on the Island. Jack asks Ben if he intends to keep his promise to let Jack leave. Ben says that its not all up to him in that the Island will not necessarily let Jack leave. He also tells Jack that if he does leave, there might be a time when he would want to come back.

Michael is tied up, when Juliet walks in. She tells him the boat is his, so that he can take Walt away after he will have saved Ben. She comments that Walt is special, that he's not an ordinary boy, and that's why she is worried about him. Juliet is glad that Michael is going to get Walt away from the Island and assures him that Ben will do what he wants. She then reveals the deal with Ben she has made herself, concerning her sister. Then she mentions Michael's list and wishes him good luck.

Jack is asleep on the beach when Juliet wakes him up. She tells him that since Jack brought her to the camp Sayid and the others have not trusted her and think she is there to hurt them. Before Jack can say he will protect her, Juliet tells him that they are right and she is still working for Ben and she has been sent to the camp to do tests to find out which of the women are pregnant. Jack asks her why she is telling him this and she tells him how she saw Sun's baby the night before and that she is tired of living Ben's dream.

Juliet is outside Room 23 where there is some sort of commotion and an alarm sounding. Ben arrives and Juliet tells him that he (presumably Walt) has done something again and that everybody is too scared to go in there. Juliet suggests that they could bring him back to Michael, but Ben refuses. Ben tells her that Walt is special and that Jacob wanted him there, but Juliet says that he is dangerous. When Ben counters that he is only a child, Juliet brings him outside to show what he has done: a group of dead birds lay on the stairwell.

Dr. Arzt tries to convince Jin and Sun not to move from the beach to the caves as Jack has proposed. When Hurley and Michael tell him they can't understand him, he also expresses his doubts in Jack's role as a leader to them. However he changes his mind and decides to move to the caves after all when the roaring of the monster interrupts their conversation.

Sun is watching Jin fish and then walks into the jungle. There she buries a California drivers license when Michael runs by looking for Vincent. Seeing the license he picks it up and Sun tries to explain that she was going to leave Jin. Michael comforts her telling her it will be okay. The two almost share a kiss but Vincent appears barking before anything can happen, prompting Sun to leave.

Dr. Arzt is catching a spider in the jungle when Michael comes up and asks about the weather conditions for launching the raft. Then Arzt admits he made up the story about the monsoon because he wanted them to get help with the raft as soon as possible. He then tells Michael he went to Sydney to meet a woman whom he had met on the internet, but that she disappeared during their first dinner in a restaurant.

Jack is searching for supplies when he meets Ethan Rom, who gives him a case full of medicine that he says he found in the jungle. Ethan mentions that Claire might have to deliver the baby on the island, and Jack thanks him for his assistance. Ethan tells Jack his own wife died in childbirth along with the baby, and they both hope that rescue is on the way.

Hurley, Michael, and Jin are playing golf on the golf course. After Jin misses a putt to win the game, he goes on a temper-tantrum, shouting in Korean. As Hurley and Michael look on, Jin lets out all of his anger: he is unhappy, he doesn't want to be pitied, nobody understands him, and he is tired of the handcuffs. As Michael and Hurley eventually leave, Jin sits down, half crying, and repeating "I'm so alone."

Juliet is at her home at the Barracks when she notices that the muffins in the oven are burning. After scalding her hand while taking them out, the doorbell rings. It is Amelia. She helps Juliet, getting some ice for her hand, but realizes that something else is troubling Juliet. She asks if it is Ben, and Juliet says that things have gotten awkward between them. Amelia asks if he finally told her how he felt, but Juliet says he didn't; things are complicated. After Amelia further presses Juliet about what is going on, Juliet hints that they are somehow in trouble. Juliet then asks Amelia to keep quiet about something she is about to show her. As Juliet pulls an envelope out of the kitchen drawer, the doorbell rings...

Vincent is running through the jungle on the island, when he encounters Christian Shephard. Christian tells Vincent to find Jack and wake him up because he "has work to do." The first scene of "Pilot, Part 1" then replays with Vincent encountering Jack as he is regaining consciousness.