The information the others have on the losties is extreme. It's one thing to know stuff that could be found in a data base somewhere. Like work history, medical records, financial profile etc... but how could Juliet know about Sawyer killing Frank Duckett?

This episode showed that the others didn't know the plane was gonna crash or who was on it. So we can rule out the possibilty that the losties were followed around and spied on prior to crashing on the island.

I think Patchy was the key to getting this info on the losties. By means of remote viewing or something like it.

Any ideas?

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Doctor playing golf. Woo, boy howdy, now I've heard everything. What's next, cop eating a donut?