3. Naomi tells Hurley that all the Oceanic 815 passengers were killed.

In a vision, Desmond saw a parachutist whom he believed to be his beloved Penelope. Instead, she turned out to be Naomi, a mystery lady with grim news for the castaways from the outside world: They're all dead. Apparently, the wreckage of Oceanic 815 was found in the ocean (how can that be?) with all bodies found aboard (how can that be?). And with that, a whole world of alternate-reality theories were born.