I am such a Lost fanatic!!! We will have to wait until mid January for the new season!!!
The best to me was Penny and Desmond. That was so unexpected! I just cried it was so happy and emotional!
The hardest to watch was Sun and Jin. That was heartbreaking. Of course, Jin could still be alive.
I think John had to travel back to get the "Oceanic 6" to return to the island and make things right. Ben said when they left, horrible things started happening. John went back to see each one and convince them to return. I think it was Windmore who found him and killed him while he was off the island.