Season 5, Episode 1: Because You Left
As a result of Ben moving the island, the survivors left on the island begin skipping through time. Meanwhile, three years later in Los Angeles, Ben starts convincing the Oceanic 6 to return to the island.
Season 5, Episode 2: The Lie
While Ben and Jack try to round the Oceanic 6 up, Sayid and Hurley are on the run from the law. Meanwhile, back on the island, the survivors, still skipping through time, come under attack.
Season 5, Episode 3: Jughead
Desmond returns to Oxford to fulfill Faraday's request to find his mother. Back on the island, the survivors discover that they've run into The Others 50 years in the past, but Richard Alpert is the same age.
Season 5, Episode 4: The Little Prince
In Los Angeles, Kate tries to find out who is trying to take Aaron away from her. Back on the island, Locke convinces everyone that they have to go to The Orchid.
Season 5, Episode 5: This Place Is Death
In order to avoid being killed, Ben promises to offer proof to Sun that Jin is still alive. On the island, Jin meets up with the survivors as Locke reaches The Orchid and fulfills his mission.
Season 5, Episode 6: 316
Eloise explains that the Oceanic 6 have a very limited window to return to the island, and leaves Jack instructions to bring one of his father's items to John Locke.
Season 5, Episode 7: The Life and Death of Jeremy Bentham
John Locke, now alive again and back on the island after the second plane crash, flashes back to his return to civilization, where he is brought in by Charles Widmore and asked to convince the Oceanic 6 to return to the island.
Season 5, Episode 8: LaFleur
The survivors left on the island, now led by Sawyer after Locke's departure, find themselves back in the 1970s, where they are now forced to become members of the Dharma Initiative.
Season 5, Episode 9: Namaste
Jack, Kate and Hurley wind up on the island in 1977, where they meet up with Sawyer and also join the Dharma Initiative. Meanwhile, Sun is stuck on the island in the present with Ben and the other passengers after the plane crash.
Season 5, Episode 10: He's Our You
Sayid is held as a prisoner by the Dharma Initiative, presumed to be a Hostile. However, during his capture, he believes he has discovered the reason why he's back on the island.
Season 5, Episode 11: Whatever Happened, Happened
Season 5, Episode 12: Dead Is Dead
Season 5, Episode 13: Some Like It Hoth
Season 5, Episode 14: The Variable
Season 5, Episode 15: Follow the Leader
Season 5, Episode 16: The Incident