Recap of episode 18:

An unlikely person helps Desmond save the life of the mysterious woman who crashed onto the island, and Juliet helps Sun find out whether she conceived on the island or before the plane crash.

Recap of episode 14:

Nikki and Paulo are two more of the castaways with a past just like any of the others. What have they been doing since the plane crash?

Recap of episode 5:

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

Recap of Episode 9:

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.

Watch Episode 10 of Lost:

Recap of Episode 7:

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.