Lost Pilot: Part 1

Out of the blackness, the first thing Jack senses is pain. Then burning sun. A bamboo forest. Smoke. Screams. With a rush comes the horrible awareness that the plane he was on tore apart in mid-air and crashed on a Pacific island. From there it's a blur, as his doctor's instinct kicks in: people need his help. The survivors have landed on an island of harsh terrain, cruel weather and dark secrets, including a frightful creature that stalks the jungle. Strangers all, even those related by blood, the survivors' pasts, and attitudes threaten to jeopardize the group's ability to endure. However, thanks to the calm leadership of Jack and Kate, the group has hope for survival and rescue.

Lost Pilot: Part 2

The discovery of a transceiver among the plane's wreckage and the thought that rescue could be imminent temporarily raises the castaways' spirits. And the island's mysteries continue to baffle with the discovery of handcuffs, a gun and an animal that shouldn't be able to survive in a tropical climate.

Episode 101: Tabula Rasa

Jack and Hurley discover an alarming secret about Kate, as the marshal's life hangs in the balance. Meanwhile Kate, Charlie, Sawyer, Sayid, Boone and Shannon ponder the island's mysteries they've uncovered and worry that telling the other survivors will cause panic. Locke's befriending of Walt disturbs Michael.

Episode 102: Walkabout

Survivors are jolted awake in the middle of the night when wild island beasts invade the beach encampment. Kate and Michael join the mysterious Locke on a hunt for food. A shocking secret about Locke is revealed. Meanwhile, some survivors are horrified by Jack's plan for the dead bodies still scattered among the wreckage, and Jack sees someone in the jungle who might not have been on the plane. .

Episode 103: White Rabbit

Jack is near 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, the pregnant Claire's health takes a bad turn, and a thief may have stolen the last bottles of water.

Episode 104: House of the Rising Sun

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.

Episode 105: The Moth

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 radio transmission.

Episode 106: Confidence Man

When Shannon suffers an asthma attack, Jack and Sayid realize brutality might be the only way to convince Sawyer to relinquish the life-saving medicine he's hoarding. Meanwhile, Sun struggles to decide if she'll obey husband Jin's orders to stay out of others' affairs and Kate uncovers some shocking secrets about Sawyer.

Episode 107: Solitary

Sayid's life is placed in grave danger after he stumbles upon the source of the mysterious French transmission. Meanwhile, Hurley has a ridiculous plan to make life on the island a little more civilized – and it just might work.

Episode 108: Raised by Another

Jack, Kate and Charlie wonder if Claire's disturbing nightmares might be coming true to threaten her life and the life of her unborn child, and a missing castaway returns with frightening news about what lies just beyond the mountain.

Episode 109: All the best cowboys have daddy issues

Survivors wonder why Charlie and the pregnant Claire have been abducted – and by whom –– and a search party ventures into the treacherous jungle to try to find and rescue the missing duo. Meanwhile, inner–demons about his father resurface for Jack, and Boone and Locke discover another island mystery.

Episode 110: Whatever the case may be

Enlisting Shannon to help translate the papers he stole from the French woman, Sayid makes a startling discovery. Meanwhile, Kate and Sawyer find a briefcase in the wreckage submerged in a hidden lagoon and find themselves pitted against each other when it becomes clear that the contents of the case holds vital information about Kate's past.

Episode 111: Hearts and Minds

When Locke learns that Boone wants to tell their "secret" to Shannon, Shannon's life is placed in sudden peril, and the shocking truth about her past with Boone is revealed. Meanwhile, Kate is puzzled by Sun's mysterious behavior, and a hungry Hurley must repay a debt to Jin. Guest starring are Kelly Rice as Nicole, Charles Mesure as Bryan and Adam Leadbeater as Malcolm.

Episode 112: Special

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.

Guest starring are Tamara Taylor as Susan, Monica Garcia as nurse, David Starzyk as Brian and Natasha Goss as Dagne.

Episode 113: Homecoming

After the missing Claire returns with no recollection of what has happened since before the doomed flight of Oceanic 815, Jack and Locke formulate a plan of defense against her kidnapper, the mysterious Ethan, who threatens to kill off the other survivors unless Claire is returned to him.

Guest starring Christian Bowman, William Mapothe

Episode 114: Outlaws

Kate and Sawyer divulge dark secrets to each other while tracking a renegade boar that Sawyer swears is purposely harassing him. Meanwhile, Hurley and Sayid worry that Charlie is losing it after his brush with death, and a shocking, prior connection between Sawyer and Jack is revealed.

Robert Patrick ("Terminator 2: Judgment Day," "The X–Files") guest stars.

Episode 115: ...In Translation

When the raft the survivors have been building mysteriously burns down, Michael is convinced that Jin is responsible for the sabotage, which only further escalates their rivalry. Meanwhile, Sun stuns her fellow survivors with a surprising revelation, and Boone gives Sayid a warning about Shannon.

Episode 116: Numbers

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.

Episode 117: Deux Ex Machina

Boone becomes concerned when Locke suffers physical problems while they try to find a way into the mysterious hatch. Meanwhile, Jack is reluctant to help when Sawyer starts to experience excruciating headaches, and Michael and Jin struggle to communicate while working together on the raft.

Episode 118: Do No Harm

Claire goes into labor while a helpless Charlie goes into panic mode. Meanwhile Locke is missing, Jack tends to a wounded survivor, and Sayid presents Shannon with a romantic surprise.

Episode 119: The Greater Good

After burying one of their own, tempers flare as the castaways' suspicions of each other grow -- and an unlikely survivor vows revenge. Meanwhile, Claire and Charlie struggle to calm her newborn.

Guest starring Jenny Gago, David Patterson, Donnie Keshawarz, Dariush Kashani and Ali Shaheed Amini.

Episode 120: Born to Run

Jack suspects foul play when Michael becomes violently ill while building the raft. Meanwhile a secret from Kate's past is revealed, the mysterious hatch is shown to a few of the survivors, and Walt gives Locke a warning.

Guest starring Anosh Yagoob, Daniel Roebuck, Tamara Lynch, Mackenzie Astin, and Beth Broderick.

Season Finale: Exodus Part 1, 2, & 3.

The French woman -- Rousseau -- shocks the survivors by showing up with a dire warning about the "Others." Meanwhile, Michael and Jin ready the raft for sailing and are surprised at sea by something they didn't expect. Meanwhile, remaining islanders try to blow open the hatch, and a visitor to the encampment might be a threat to Claire's infant son, on the Season Finale of "LOST."

Guest starring Frederic Lane, Mira Furlan, Daniel Roebuck, Michelle Rodriguez, Kevin E. West, Wendy Braun, and Robert Frederick.