| Episode | Description |
|---|---|
| A TALE OF TWO CITIES | Jack, Kate and Sawyer discover they are prisoners of the Others |
| THE GLASS BALLERINA | Sayid searches for a location of another signal fire which could have fatal consequences for Jin and Sun while Kate and Sawyer hatch a plot to escape |
| FURTHER INSTRUCTIONS | Lock builds a sweat lodge which tells him to go after Mr. Eko and Desmond discovers he has an unusual power |
| EVERY MAN FOR HIMSELF | Sawyer tries to escape but Ben discovers a way to stop him and Jack operates on a gun shot victim and see an x-ray for someone else |
| THE COST OF LIVING | Ben Requests that jack operate on his tumor. Sayid and Locke travel to the Pearl Station to attempt to contact the Others. The smoke monster returns to claim another victim |
| I DO | The Others use Kate to convince Jack to save Ben and other castaways want answers about the black monster |
| NOT IN PORTLAND | Jack tries to help Sawyer and Kate escape. We see how Juliet joined the Others |
| FLASHES BEFORE YOUR EYES | Desmond saves Charlie's life and everyone wants to know how Mr. Eko died |
| STANGER IN A STRANGE LAND | Sawyer and Kate return to the Island and Jack works out a deal to save Juliet life |
| TRICIA TANAKA IS DEAD | Hurley, Jin and Sawyer fix up an old minivan found in the jungle and Kate finds help in rescuing Jack |
| ENTER 77 | Sawyer, Kate and Locke make a startling discovery en route to rescue Jack and Hurley and Sawyer face off for Sawyers stuff |
| PAR AVION | Claire hatches a plan to send an S.O.S. and Sayid, Kate and Locke reach the Others compound |
| THE MAN FROM TALLAHASSEE | Jack tells Kate he made a deal to go home but Locke has other plans. Another Locke flashback about his Father |
| EXPOSE | Hurley believes that someone might have something to do with the mysterious deaths of 2 castaways Nikki and Paulo. Sun learns the truth about her kidnapping |
| LEFT BEHIND | The Others abandon their secret location taking Locke with them and Hurley warns that Sawyer is being banished from the group |
| ONE OF US | Sayid, Kate, Jack and Juliet return to camp. When Claire gets sick Juliet may be the only one who can save her |
| CATCH 22 | Desmond leads a mission into the jungle after another vision |
| D.O.C. | After learning the fate of other pregnant women on the island Sun allows Juliet to examine her and learns the identity of the father |
| THE BRIG | Ben gives Locke an ultimatum and Locke then imprisons Sawyer with whom he shares a previously unknown common bond. A new island inhabitant has information about Oceanic flight 815 |
| THE MAN BEHIND THE CURTIAN | Ben tells Locke some of the islands secrets beginning with Jacob. Juliet is exposed as a spy. Flashback to how Ben arrived on the island |
| GREATEST HITS | Jack comes up with a plan to destroy the Others. Desmond has a vision of Charlie's death from Sayid's plan to get off the island |
| THROUGH THE LOOKING GLASS (PART I) | Jack and the castaways make an effort to contact Naomi's rescue ship while Jin, Sayid and Bernard set a trap for the Others |
| THROUGH THE LOOKING GLASS (PART II) | One of castaways pays the ultimate price for his struggle against the Others Hurley goes on a mission to save his friends |