الضياع

بعد أن جُرِّدوا من كل شيء، يقتات الناجون الثمانية والأربعون على ما تبقى من الطائرة للبقاء على قيد الحياة. يصاب بعضهم بالذعر، ويعلق آخرون آمالهم على الإنقاذ. يكتشف قليلون قوة داخلية لم يكونوا يعلمون بوجودها، مثل كيت التي تجد نفسها فجأة، دون أي تدريب طبي، تخيط جروح الطبيب. يجب على هذه المجموعة من الأصدقاء والعائلة والأعداء والغرباء أن يتعاونوا في مواجهة قسوة الطقس ووعورة التضاريس. لكن عواء المخلوقات الغامضة التي تجوب الأدغال يملأ قلوبهم جميعًا بالخوف. لحسن الحظ، وبفضل القيادة الهادئة لجاك سريع البديهة وكيت الرزينة، لا يزال لديهم أمل. لكن حتى الأبطال لديهم أسرار، كما سيكتشف الناجون لاحقًا

بعد هروبهم من "المخلوق" واستعادة جهاز الإرسال والاستقبال الخاص بالطائرة، تتجه مجموعة من الناجين إلى أرض مرتفعة لبث إشارة. وفي طريقهم، يتلقون بثًا غامضًا ويصادفون أحد سكان الجزيرة. في هذه الأثناء، في المخيم، يعتني جاك برجل جريح يكشف له سرًا عن كيت

يكتشف جاك وهيرلي سرًا مقلقًا بشأن كيت، بينما حياة المارشال على المحك ويعاني ألمًا شديدًا. في هذه الأثناء، تتأمل كيت وتشارلي وسوير وسعيد وبون وشانون في الألغاز التي بدأوا بكشفها، ويخشون أن يؤدي إخبار الناجين الآخرين إلى إثارة الذعر. لذا يقررون الكذب مؤقتًا. كما أن صداقة لوك مع والت تُزعج مايكل، لكن والت أكثر اهتمامًا بالعثور على كلبه. أخيرًا، تسترجع كيت ذكريات اعتقالها من قبل المارشال في أستراليا

يستيقظ الناجون فجأة في منتصف الليل على غزو وحوش الجزيرة البرية (وهي خنازير برية) لمخيم الشاطئ. تنضم كيت ومايكل إلى لوك الغامض في رحلة بحث عن الطعام، وهناك يُكشف سرٌّ صادمٌ عنه. أثناء البحث، يُصاب أحدهم. في هذه الأثناء، يشعر بعض الناجين بالرعب من خطة جاك للجثث المتناثرة بين الأنقاض، فهو يريد حرقها. يرى جاك شخصًا غير موجود، ونكتشف أن أحد الناجين كان عاجزًا عن المشي، لكنه الآن يستطيع

جاك يكاد يهذي من قلة النوم، ويكافح للتغلب على الأحداث المؤلمة التي دفعته إلى أستراليا، ومن ثم إلى الجزيرة. في هذه الأثناء، يُحاصر بون في تيار جارف أثناء محاولته إنقاذ امرأة خرجت للسباحة. وتتدهور صحة كلير الحامل بسبب نقص السوائل، وقد يكون لص قد سرق آخر زجاجات المياه. وتظهر فيرونيكا هامل كضيفة شرف بدور مارغو، والدة جاك كما يعود جاك بالذاكرة إلى الوراء عندما كان عمره 12 عامًا، ليجد نفسه في الملعب في شجار مع متنمر، والذي قام في النهاية بضربه، ويتعلم لاحقًا درسًا في الحياة من والده

يُصاب والت والآخرون بالصدمة عندما يتعرض مايكل للضرب المبرح، لكن جين وسون، اللذان لا يتحدثان الإنجليزية، هما الوحيدان اللذان يعرفان حقيقة الهجوم. في هذه الأثناء، يتجادل كل من كيت وجاك وسوير وسعيد حول مكان تخييم الناجين - على الشاطئ، حيث يُرجح أن يُروا، أو في وادٍ داخلي ناءٍ تكثر فيه المياه العذبة؛ ويكتشف لوك سر تشارلي.

يبدأ تشارلي رحلة مؤلمة للتخلص من إدمان المخدرات، ويتلقى مساعدة غير متوقعة من لوك، الذي يبقى دافعه الحقيقي لمساعدة تشارلي لغزًا. في هذه الأثناء، يكافح الناجون للعثور على جاك وتحريره بعد أن دُفن حيًا تحت انهيار كهف، وقد يكون هناك من يُعرقل سرًا خطة سعيد وكيت وبون للعثور على مصدر البث الفرنسي

ينفد بخاخ شانون، ويعتقد بون أن سوير يحتفظ بالبخاخات الثلاثة المتبقية في مخبأه. عندما يرفض سوير التخلي عنها، يلجأ جاك وسعيد إلى تعذيبه حتى يوافق على الكشف عن مكان البخاخات. في مشهد استرجاعي، نسمع قصة سوير ونكتشف أنه ليس الشخص الذي يدّعي أنه هو

تتعرض حياة سعيد لخطر جسيم بعد أن يعثر بالصدفة على مصدر البث الفرنسي الغامض، وهي دانييل روسو (الممثلة الضيفة ميرا فورلان). كانت هي من أرسلت نداء الاستغاثة، وقد وُجدت على قيد الحياة. في هذه الأثناء، لدى هيرلي خطة غريبة لجعل الحياة على الجزيرة أكثر تحضرًا. تتضمن الخطة استخدام مضارب غولف وجدها بين الأنقاض، ويبدو أنها قد تنجح. أخيرًا، نعود بالذاكرة إلى صديقة طفولة سعيد، نادية، ومشاركته في عمليات احتجاز الرهائن في العراق

تُعاني كلير من كابوس واقعي مُرعب حول تعرض طفلها الرضيع للأذى أو الاختطاف. تكشف مشاهد الماضي عن قصة كلير: حبيبها السابق الذي حملت منه ثم تخلى عنها، والعرافة التي أقنعتها بركوب الرحلة المشؤومة التي أوصلتها إلى الجزيرة. يُصاب هيرلي بالصدمة والحيرة عندما يكتشف أن إيثان روم (الممثل الضيف ويليام مابوثر)، وهو ناجٍ آخر من تحطم الطائرة، غير مُدرج في قائمة ركاب الرحلة

يتساءل الناجون عن سبب اختطاف تشارلي وكلير، ومن الخاطف، وينطلق فريق بحث إلى الأدغال الوعرة للعثور عليهما. وتدور الشكوك حول إيثان روم (الممثل الضيف ويليام مابوثر)، الذي تبين مؤخرًا أنه لم يكن من ركاب الرحلة المنكوبة. يكافح جاك شياطينه الداخلية المتعلقة بوالده، بينما يكتشف بون ولوك لغزًا آخر في الجزيرة

يتشاجر جاك وكيت وسوير على حقيبة معدنية مقفلة تم اكتشافها حديثًا، والتي قد تحتوي على معلومات تكشف ماضي كيت الغامض. في هذه الأثناء، يطلب سعيد من شانون المترددة ترجمة ملاحظات دوّنها من المرأة الفرنسية. يهدد المدّ المتصاعد بابتلاع جسم الطائرة ومخيم الشاطئ بأكمله، وتتقارب روز وتشارلي الحزين تدريجيًا بسبب اختطاف كلير الغامض

عندما يعلم لوك أن بون يريد مشاركة "سرهما" مع شانون، يقرر لوك تلقينه درسًا. يؤدي هذا إلى وضع حياة شانون في خطرٍ محدق. يُكشف عن ماضي بون وشانون المظلم في قصةٍ صادمة تُعيد إلى الأذهان علاقتهما قبل تحطم الطائرة مباشرةً، وتنبئ بعودة الوحش. كيت، التي أصبحت كاتمة أسرار صن الهادئة، تُصاب بالحيرة من سلوك صن الغامض واكتشافها أنها تتحدث الإنجليزية. يجب على هيرلي الجائع إقناع جين بمشاركة سمكه، وذلك بتعويضه عن إهانته برفضه عرضه للسمك النيء في وقتٍ سابق، وإلا سيستمر في المعاناة من مشاكل هضمية بسبب النظام الغذائي المحدود في الجزيرة

تندلع أعمال عنف، ويعود وحش جزيرة غامض للظهور عندما يتصادم مايكل ولوك حول تربية والت. في هذه الأثناء، يراود تشارلي إغراء قراءة مذكرات كلير المفقودة، ويستعين سعيد بشانون للمساعدة في فك رموز خريطة المرأة الفرنسية

بعد عودة كلير المفقودة دون أن تتذكر شيئًا مما حدث منذ صعودها على متن رحلة أوشيانيك المشؤومة رقم 815، يضع جاك ولوك خطة دفاعية ضد خاطفها، إيثان الغامض (الممثل الضيف ويليام مابوثر)، الذي يهدد بقتل الناجين الآخرين واحدًا تلو الآخر ما لم تُعاد كلير إليه. في هذه الأثناء، يُثير شعور تشارلي بالإحباط لعدم تذكر كلير له ذكريات امرأة خذلها في الماضي

تتبادل كيت وسوير أسرارًا دفينة أثناء تعقبهما لخنزير بري مارق، يُقسم سوير أنه يتعمد مضايقته. يشعر هيرلي وسعيد بالقلق من أن تشارلي قد فقد صوابه بعد أن نجا بأعجوبة من الموت وقتل إيثان بست رصاصات في صدره. يُكشف عن علاقة سابقة صادمة بين سوير وجاك في مشهد فلاش باك يُظهر سوير وهو يلتقي والد جاك في حانة. يشارك روبرت باتريك ("تيرميناتور 2: يوم الحساب"، "ملف إكس") كضيف شرف

عندما يحترق الطوف الذي كان الناجون يبنونه بشكل غامض، يقتنع مايكل بأن جين هو المسؤول عن التخريب، مما يزيد من حدة التنافس بينهما. في هذه الأثناء، تُفاجئ صن رفاقها الناجين بكشفٍ مُفاجئ، ويُحذّر بون سعيدًا بشأن أخته غير الشقيقة شانون. أخيرًا، تُكشف المزيد من تفاصيل زواج جين وصن المضطرب من خلال مشاهد استرجاعية.

عندما يُفتن هيرلي بالمرأة الفرنسية ويتجه إلى الأدغال بحثًا عنها، لا يجد جاك وسعيد وتشارلي خيارًا سوى اللحاق به. يسترجع هيرلي ذكريات التجربة التي غيّرت حياته جذريًا قبل صعوده إلى الطائرة.

يظن لوك أنه يتلقى إشارةً حول كيفية فتح الفتحة، فيغامر هو وبون بالدخول إلى الداخل. يتردد جاك في تقديم المساعدة عندما يبدأ سوير بالمعاناة من صداعٍ مبرح ويحتاج إلى نظارة

يعتني جاك ببون المصاب بجروح بالغة بعد أن أعاده لوك إلى الكهوف. وفي خضم الفوضى، ينسحب لوك ليتعامل مع شعوره بالذنب حيال الأزمة. في هذه الأثناء، تفاجأت كلير بدخولها في المخاض وهي في أعماق الغابة

بعد جنازة أخرى، تتصاعد حدة التوتر مع تزايد شكوك الناجين تجاه بعضهم البعض، ويتعهد ناجٍ غير متوقع بالانتقام. تتكشف الأحداث التي أوصلت سعيد إلى الرحلة 815 بينما يخوض مع لوك لعبة نفسية من الكر والفر لكشف حقيقة الحادث الذي أودى بحياة بون

يشتبه جاك في وجود جريمة عندما يُصاب مايكل بوعكة صحية شديدة أثناء بناء الطوف. ومن بين المشتبه بهم سوير وكيت، اللذان يتنافسان على المقعد الأخير في الطوف ويفعلان كل ما في وسعهما لمنع الآخر من الحصول عليه. في هذه الأثناء، يُكشف سر من ماضي كيت للناجين الآخرين على الجزيرة

تُفاجئ الفرنسية دانييل روسو الناجين بظهورها في المخيم حاملةً تحذيراً خطيراً بشأن "الآخرين" الموجودين على الجزيرة، والدخان الأسود الذي يسبقهم. في هذه الأثناء، يُجهّز مايكل وجين الطوف للإبحار. وفي مشاهد استرجاعية، نرى اللحظات الأخيرة للناجين قبل صعودهم على متن رحلتهم المشؤومة

يُفاجأ الناجون على الطوف في عرض البحر بشيء غير متوقع. في هذه الأثناء، يحاول سكان الجزيرة المتبقون تفجير فتحة الطوف، وقد يُشكل زائر للمخيم خطرًا على ابن كلير الرضيع.

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 familiar face in the jungle.

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 sea. Meanwhile on land, Locke must descend into the hatch when Kate goes missing inside. Also, Jack isn't too far behind Locke as he decides to go into the hatch as well later on. Lastly, flashbacks reveal more of Michael's troubled relationship with ex-lover Susan and their baby son Walt as they fight over custody for Walt and Michael must let go.

Michael, Sawyer, and Jin find themselves prisoners after they encounter what they believe to be a group of Others. At the Hatch, the group learns more about their new surroundings but are confused at Desmond's reaction when the strange computer equipment is broken.

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 island. Claire uncovers a startling piece of information about the fate of the raft.

The tail-section survivors trek back to the southern beaches of the Island, but encounter trouble as Michael sets off by himself to find Walt. Meanwhile, at the main camp, Sun is heartbroken as she realizes that she has lost her wedding ring.

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.

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 side of the island on the beach. As the days progress danger hits their camp as well when "The Others" start taking people against their will. As the survivors race inland, trying to stay a step ahead of The Others, they realize that someone among them wasn't on Flight 815.

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 himself. Flashbacks reveal Ana Lucia's troubled life as a cop.

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 encounter with the computer.

When Eko finds Charlie's Virgin Mary statue, he demands that he take him to where he found it at once. Michael continues to communicate on the Swan computer without the other survivors knowing.

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

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.

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 and Jack in terms of locking up the guns and being kept safe. Meanwhile, Sawyer is an amused but highly interested bystander when tension escalates between Jack, Locke, Kate and Ana Lucia. When Jack purposely takes Sawyer's medication from him he pushes more in favor of helping Locke. Lastly, flashbacks reveal more of Sawyer's con artist past.

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, 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 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 she can find a cure for Aaron's illness. In the meantime, Jack and Locke are doing their best to keep their prisoner a secret from the rest of the survivors on the island.

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 the new prisoner Henry Gale to get more information out of him about the balloon that he and his wife supposedly landed on the island with.

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 truth about Henry Gale and see if there really is balloon craft out there in the jungle that carried him and his wife to the island.

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, Sex and the City) on the island, who was his friend in the mental institution Hurley was in. Also, Locke's sense of purpose is shaken when the prisoner gives him new information about the hatch.

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.

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 date for Libby.

Mr. Eko has dreams about his brother leading him somewhere. He seeks Locke's help in finding a secret location, the "question mark." Meanwhile, Jack and the other survivors grapple with the horrific situation in the hatch with the death of Ana-Lucia and Libby clinging to life.

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 the button, risking everyone's safety. Meanwhile, the events that happened to Michael after he left are finally revealed. Meanwhile, Charlie struggles with Eko's decision to discontinue building the church.

After discovering something odd just offshore, Jack and Sayid come up with a plan to confront "The Others" and hopefully get Walt back. At the same time there will be an answer to the question of where Michael has been and resolution of him and Walt. Meanwhile, Eko and Locke come to blows as Locke makes a potentially cataclysmic decision regarding the "button" and the hatch. Lastly, Desmond returns and he sheds some more light on his experience on the island in the three years prior to when Locke came down into that hatch.

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.

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".

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".

They thought they had met the enemy. They thought they had seen evil. They thought wrong. As the new season begins, the survivors feel that rescue is close at hand, but they don't know whether or not to believe Charlie's final message that the people claiming to liberate them are not who they seem to be. As unlikely alliances are formed, those they thought could be trusted may turn against them, as the enemy of their enemy becomes their friend. But who can be trusted? Is rescue really as close as it seems?

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

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.

Kate needs to get information out of the hostages, but it may jeopardize her standing with Locke -- as well as with Sawyer. Meanwhile in the future Kate's Court hearings take place.

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

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.

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.

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.

Jack tries to discover the identity of a body that has washed ashore. Meanwhile, Locke's camp is attacked by Ben's adversaries.

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

Locke finds out where Jacob's cabin is. Life on the freighter becomes dangerous.

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".

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

The remaining island survivors start to feel the effects of the aftermath of moving the island, and Jack and Ben begin their quest to reunite the Oceanic 6 in order to return to the island with Locke's body in an attempt to save their former fellow castaways.

Hurley and Sayid are on the run from the cops after stumbling into trouble at the safehouse; the island survivors come under attack by unknown forces; and an old friend offers some shocking advice to Kate in order to ensure that "the lie" remain a secret.

Desmond looks for a woman who might be the key to helping Faraday stop the island's unpredictable movements through time; Locke finds out who has been attacking the survivors.

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.

Locke shoulders the burden of ending the island's increasingly violent movements through time; Ben is stymied in his efforts to reunite the Oceanic 6 and bring them back to the island.

The members of Oceanic 6 discover how to get back to the island, but not all of them want to return.

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

Sawyer perpetuates a lie with some of the other island survivors in order to protect themselves from mistakes of the past.

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

Everyone on the island is at risk when one of the survivors decides to go against them and taking matters into their own hands.

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.

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

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.

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.

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

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.

Two outcomes of the detonation of the hydrogen bomb are presented. Flight 815 lands safely at LAX, where Kate escapes from the marshal and Jack learns that his father's body was lost in transit.

Jack, Sawyer, Kate, Miles and Hurley, struggling to save Sayid, face an ancient secret. Meanwhile, a fake Locke exits the chamber to everyone's awe.

When Sawyer escapes from the temple, Kate and Jin are sent to bring him back. Meanwhile, the Others determine Sayid is infected and attempt to poison him. In the flash sideways, Kate, still on the run, takes Claire to a hospital when she goes into labor.

On the island, the Man in Black attempts to recruit Sawyer in his attempt to leave the island, while an impromptu funeral is held for the real Locke. In the flash sideways, Locke is fired from his job and becomes a substitute teacher.

On Jacob's orders, Hurley leads Jack to a lighthouse. Meanwhile, Claire questions an Other she has captured while tending to an injured Jin. In the flash sideways, Jack is a single father trying to bond with his son.

After recruiting Sayid to his cause, the Man in Black issues an ultimatum to the Others: either join him or die. Meanwhile, Kate is reunited with Claire. In the flash sideways, Sayid helps his brother, who is in debt to a loan shark.

Ilana discovers Ben killed Jacob, so she plans to kill him. Meanwhile, Jack, Hurley and a suicidal Richard visit the Black Rock. In the flash sideways, Ben, a high school teacher, tries to blackmail the school's principal.

The Man in Black sends Sawyer on a reconnaissance mission to Hydra Island, where he discovers that Charles Widmore has returned to the island with a team of scientists. In the flash sideways, Sawyer is a lonely cop who is still searching for the original Sawyer.

Richard Alpert's back story is shown: In 1867, he is brought to the island on the Black Rock as a slave. He makes a deal with Jacob to be his representative in exchange for immortality. In the present day, Hurley convinces him to help the candidates replace Jacob and stop the Man in Black from leaving the Island.

After Jin is kidnapped and taken to Hydra Island by Widmore's team, the Man in Black confronts Widmore. On the main island, Sun loses her ability to speak English. In the flash sideways, Sun and Jin are abducted after failing to complete a transaction for Sun's father.

On the island, Widmore subjects Desmond to a large amount of electromagnetic energy as an experiment. In the flash sideways, Desmond, with the aid of Charlie, starts to have visions of his life in the original timeline.

In order to prevent more loss of life, Hurley leads the other survivors to speak with the Man in Black. In the flash sideways, Hurley meets Libby, while Desmond continues his mission to let the Oceanic 815 passengers know of their lives on the island.

The survivors split into two groups; one led by Sawyer, the other by the Man in Black. Sawyer's group travels to Hydra Island, where they are captured by Widmore's crew after Sun and Jin are reunited. In the flash sideways, the passengers of Oceanic 815 continue to cross paths with each other.

After the remaining survivors are reunited, Sawyer and Jack hatch a plan to divert the Man in Black's attention and leave the island without him on Widmore's submarine, but disastrous consequences await them. In the flash sideways, Jack investigates the cause of Locke's paralysis and offers treatment.

When Claudia, a heavily pregnant woman, washes ashore, support is at hand in the form of a stranger. But her intentions for Claudia and the unborn twins are unknown.

Jacob appears to the survivors of the submarine explosion and tells them what they were chosen for. Ben joins forces with Locke, as they both have a final showdown with Charles Widmore.

On the Island, Jack and the Man in Black play out their last moves as the survivors make their final choices, and the true nature of the flash sideways is revealed.