LOST Tonight: (2/2 - "LA X")

[manasecret]

Smoke Monster being the Nemesis who can then take on the form of dead people explains some of the strange transformations of character when it attacked people before. The ones I specifically remember, though there may be more, were the crew that crash landed along with that French chick who was on the island forever.

Which also makes Sayid coming back alive a very treacherous development.