There's only one more episode of "" before the series comes to an end with a two-hour season finale on Sunday, May 23. The preview offers, as usual, no new footage or conversation but uses ' "The End" as the background sound.
Since the official synopsis is yet to be released, one can only hang onto the episode's title to guess what may come up in the episode. "What They Died For", hopefully will explain why [Spoiler Alert]
Sun, Jin, Sayid and other characters have to be killed in this week's episode.