Lost

Carmina Salcido confronts Ramon Salcido, her father who left her for dead.

After Mr. Eko has a vision of his dead brother, he sets out to return to the site of his plane crash.

After Mr. Eko has a vision of his dead brother, he sets out to return to the site of his plane crash.

Jack and Sayid come up with a plan to confront "The Others" and get Walt back. Meanwhile, Locke makes a potentially cataclysmic decision regarding the "button."

Jack and Sayid come up with a plan to confront "The Others" and get Walt back. Meanwhile, Locke makes a potentially cataclysmic decision regarding the "button."

When the hatch suddenly takes on a life of its own, Locke is trapped alone in the bunker and is forced to enlist the help of an unlikely ally.

Hurley thinks the island is affecting him in a very strange way, and Libby attempts to offer support; Hurley recalls his past in a mental hospital with his friend Dave.

Bernard tries to convince the survivors to build a S.O.S. signal with rocks on the sand, hoping to be seen by a satellite or an airplane.

When Sun comes to the realization that she might be pregnant, she struggles on whether to tell Jin. Ana-Lucia is called in by Locke to interrogate the prisoner.

When Sun comes to the realization that she might be pregnant, she struggles on whether to tell Jin. Ana-Lucia is called in by Locke to interrogate the prisoner.

Mysterious French woman Danielle Rousseau returns to lead Sayid to a mysterious captive who claims he crashed on the island.

Disturbing memories from Hurley's past cause him to struggle with a task to watch over the food storage locker. Meanwhile Claire uncovers a shocking piece of information.

Survivors fear that "The Others" may have returned when Sun is injured during a kidnapping attempt. Meanwhile, tension escalates between Jack, Locke, Kate and Ana Lucia.

Survivors fear that "The Others" may have returned when Sun is injured during a kidnapping attempt. Meanwhile, tension escalates between Jack, Locke, Kate and Ana Lucia.

Michael blames Sawyer for the abduction of Walt and promises to bring his son back. Meanwhile, Kate releases herself from Desmond's captivity and escapes.

Jack, Locke and Kate learn more secrets about the hatch. Meanwhile, Sawyer, Michael and Jin wonder if their captors are fellow survivors or the "Others."

One of the castaways is chosen to descend into the mysterious hatch, and Shannon stumbles upon a shockingly familiar face in the jungle.

After another funeral, tempers rise as the survivors' suspicions of each other grow, and an unlikely survivor vows revenge.

After another funeral, tempers rise as the survivors' suspicions of each other grow, and an unlikely survivor vows revenge.