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					Originally Posted by tri deezy  I want to know why Desmond was on that alternate-reality airplane.  He was never on the flight with them!  And, I think he knows what's up or something, like when he shook hands with Jack.  God, I am just so happy that it's back! | 
	
 
If the bomb had detonated, then chances are he wouldn't have been on the island, which means he "could" have ended up on the plane in an alternate reality.