A Tale of Two Cities
The Others' community is revealed. Jack, Kate, and Sawyer are prisoners.
The Glass Ballerina
Sun and Jin face a test on the sailboat. The prisoners are put to work.
Further Instructions
Locke wakes after the implosion, unable to speak. He goes on a vision quest.
Every Man for Himself
Ben plays a psychological game with Sawyer. A shocking revelation about their location.
The Cost of Living
Eko faces his past. The Smoke Monster passes judgment.
I Do
Kate and Sawyer's relationship reaches a turning point. Jack makes a deal.
Not in Portland
Juliet's backstory is revealed. Kate and Sawyer attempt to escape.
Flashes Before Your Eyes
Desmond's experience during the Hatch implosion is revealed. Time itself may be broken.
Stranger in a Strange Land
Jack's tattoos are explained. Juliet faces a tribunal.
Tricia Tanaka Is Dead
Hurley finds a DHARMA van and tries to get it running. Hope on the Island.
Enter 77
The survivors find the Flame station and its occupant.
Par Avion
Claire devises a plan to send a rescue message. A family connection is revealed.
The Man from Tallahassee
Locke confronts Ben at the Barracks. The origin of Locke's paralysis is revealed.
Exposé
The story of two previously unseen survivors comes to a dark conclusion.
Left Behind
The Others abandon the Barracks. Kate and Juliet are left behind together.
One of Us
Juliet joins the main camp. Her history with Ben and the Others is explored.
Catch-22
Desmond has a vision of a parachutist arriving on the Island.
D.O.C.
Sun learns the truth about her baby's father. The timeline creates a deadly dilemma.
The Brig
Locke returns to the survivors with a request for Sawyer. A connection between two characters is revealed.
The Man Behind the Curtain
Ben's origin on the Island is revealed. He takes Locke to meet Jacob.
Greatest Hits
Charlie prepares for a dangerous mission. He writes a list of his greatest moments.
Through the Looking Glass (Part 1)
The survivors make their stand against the Others. Charlie enters the Looking Glass.
Through the Looking Glass (Part 2)
The Season 3 finale delivers the show's biggest twist. A beloved character makes the ultimate sacrifice.