Guest Appearances

Wild beasts invade the survivors' beach encampment in the middle of the night; a secret is revealed about the mysterious Locke.

Jack's lack of sleep, due to the traumatic events that brought him to Australia, and subsequently to the island, begins to make him delirious.

A search party ventures into the jungle to try to find Charlie and Claire; Jack's inner demons resurface; Boone and Locke discover yet another island mystery.

Jack and Kate bring Michael back to camp along with some information about the others; Ana Lucia tries to get the prisoner to confess.

Juliet and Kate must work together to save Jack when his health is seriously compromised; something goes wrong as Sawyer, Claire, Miles and Aaron head back to the beach.

The Oceanic Six find themselves closer to rescue as the confrontation between the survivors and the freighter people continues.

Convinced that rescue is near, the survivors are uncertain whether to believe Charlie's final message warning them about their apparent rescuers.

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

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

Kate and Sawyer bond as they search for a wild boar that Sawyer swears is harassing him; Hurley and Sayid worry that Charlie is losing it after his brush with death; a shocking prior connection between Sawyer and Jack is revealed.

Those close to Jack resist his determination to formulate a plan of action; Locke assigns Ben a difficult task.

Claire goes into labor as Jack tends to another survivor; Sayid presents Shannon with a romantic surprise.

Jack, Locke and Sawyer chase Michael after he plunges into the jungle in search of Walt; Sun has a surprising reaction to Jin's desire to join the search party; Hurley and Charlie commiserate over the question of what women want.

Sawyer is forced to perpetuate his lie when some old friends drop in unannounced.

One of the castaways must descend through the mysterious hatchway; Shannon encounters a familiar face in the jungle.

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 series concludes.

Jack and Sayid devise a plan to confront the Others and get Walt back; Eko and Locke fight over the decision about the button and the hatch.

Jack's determination to formulate a plan of action is met with resistance from those close to him; Locke assigns Ben a difficult task.

Jack, Kate and Sawyer discover what they are up against as prisoners.