Hello.

I have to admit that ther person who pointed out the Jack's father info made a very good point. He was obviously forging his father's RX for the oxycodone, but if he was still alive, its obviously in the past.

After thinking about this for a few minutes, I went and rewatched the last scene with Jack and Kate (I love my TIVO). In their conversation he says "we never should have left" and "we have to go back", he never specifically says left where nor back to what (or where). He very definately DOES NOT say the word island.

On the other hand, they didn't know each other before the flight, or did they? Quite a quandry.