Following a horrific plane crash, 48 survivors of Oceanic Flight 815 from Sydney, Australia to Los Angeles, California, USA, find themselves on an uncharted tropical isla ...

Jack, Kate and Charlie return to the group, but the transceiver is broken. Sayid Jarrah fixes the apparatus and organizes an expedition with Kate, Charlie, Shannon Ruther ...

The U.S. marshal's assignment is revealed. Later, there is a difference of opinion between Jack and Sawyer as to how to help the critically injured marshal. Flashback to ...

Flashback to Locke's life before Flight 815: his job, time in Australia, the crash...and a major secret is revealed. The camp is invaded and Sawyer's scavenging falls und ...

Dr. Jack Shephard is not able to save a survivor drowning in the sea and he becomes affected by the incident and the pressure of the community pointing him as a leader. J ...

Jin jumps Michael and tries to beat him to death for no apparent reason, which gets him handcuffed to the wreckage until why can be figured out. While gathering water, Ja ...

Trying to kick his drug habit with encouragement from Locke, Charlie starts to go through heroin withdrawl, struggling with his resolve. Jack is trapped in a cave-in, and ...

When the asthma medicine of Shannon Rutherford finishes, she has a chronic respiratory attack. Her brother Boone Carlyle convinces the survivors that James Sawyer Ford ha ...

Ashamed with his behavior torturing Sawyer, Sayid Jarrah decides to leave the group of survivors and travel alone through the island, trying to find the source of transmi ...

Claire begins to have reoccurring nightmares which one night result in her turning up with bloody hands, which leads Charlie to find out what is really going on. However, ...

Claire Littleton and Charlie Pace are abducted by the mysterious Ethan Rom, and Dr. Jack Shephard, Kate Austen, John Locke and Boone Carlyle go after them. When the leads ...

Jack, Kate and Sawyer fight over possession of a newly discovered locked metal briefcase which might contain insights into Kate's mysterious past. More of fugitive Kate's ...

Boone Carlyle is jealous of Sayid Jarrah, because he becomes close to his half-sister Shannon Rutherford. Boone tells John Locke that he wants to reveal the secret about ...

John Locke is teaching Walt Lloyd to throw knives, and Michael Dawson feels jealous with the situation. He forbids Walt to meet Locke, and recalls his romance with Walt's ...

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 again ...

James Sawyer Ford wakes up from a nightmare with a boar inside his tent. He finds his canvas in the woods, but is attacked by the animal. He decides to chase the boar wit ...

When Jin Kwon is having a serious quarrel with his wife Sun Kwon, Michael Dawson defends her. Later, when Michael's raft is set afire and Jin has his arms injured by heat ...

When Hurley becomes obsessed with the mysterious French woman, he heads into the jungle to find her. Jack, Sayid and Charlie have no choice but to follow. Hurley's backgr ...

Locke and Boone build a trebuchet in an attempt to open the hatch, but Locke is injured when the trebuchet fails. Literally following a hallucination, Locke and Boone dis ...

Claire goes into labor while a helpless Charlie goes into panic mode, leading to Kate and Jin to assist with the delivery. Meanwhile, Locke goes missing after he returns ...

After the death of Boone, tempers flare as the castaways' suspicions of each other grow, while an unlikely survivor (Shannon) vows revenge against Locke, unfairly blaming ...

Jack suspects foul play when Michael becomes violently ill while building the raft and the suspects include both Kate and Sawyer. Meanwhile, more of Kate's background sto ...

Danielle Rousseau arrives in the camp of survivors at the beach and advises that The Others are coming. There is black smoke in the sky, and they have three choices: run, ...

The four castaways on the raft are surprised at sea by something unexpected: the appearance of four of the others from the island who abduct Walt. Meanwhile, Jack, Kate, ...

A visitor to the encampment could be a threat to Claire's son. ...