Michael has a flashback of how he came to be on the boat. He has tried to commit suicide because Walt won't speak to him. Tom goes to him and has a mission for him: to go on a boat and kill everyone onboard. It's Charles Widmore's boat and he wants to find the island. Ben gives him further instructions.
Locke tells everyone at his camp about Charles' plan and Miles' plan. Ben tells Alex, Danielle and Karl to go the temple where she'll be safe. Sayid tells someone on the boat all about Michael.
This was a really good episode! It was interesting to learn what happened with Michael after he left. I don't know why Sayid spilled everything. I can't believe Karl and Danielle possibly died. This episode gets a 9.5 out of 10!