

8.3105 minSeason 6 • Episode 17
LatestFor different reasons, Jack and the Man in Black both use Desmond to extinguish the light at the heart of the island. The island starts disintegrating, but The Man in Black is also made mortal. Still desperate to escape, The Man in Black fights Jack and mortally wounds him, but with help from Kate, Jack kills him. Realizing his destiny, Jack sacrifices himself to relight the heart of the island, so his friends can escape on the Ajira plane. Hurley takes Jack's place as protector of the island and makes Ben the new advisor. The flash sideways is revealed to be a type of limbo, or holding pattern, for the main characters, where they reside until accepting their life and death, and are then able to "let go" and "move on" together.
Stripped of everything, the survivors of a horrific plane crash must work together to stay alive. But the island holds many secrets.
Acting
Terry O'Quinn's Locke carries entire seasons on his bald head
Writing
Flashbacks that made you care before flash-sideways broke brains
Score
Michael Giacchino's strings = instant island dread
Trivia, insights & behind the scenes
The polar bear was originally a stuffed animal from Walt's comic, then became real because why not. Lindelof later admitted they made it up as they went.
The Hatch countdown 4-8-15-16-23-42 became a lottery curse — thousands played those numbers in 2005 and won $150 in real Mega Millions.