Why Only Jack, Kate and Hurley Flashed Back in Time
Although it hasn’t been confirmed, it seems most people are thinking that Jack, Kate and Hurley are the only ones that flashed back in time to the 1970’s, while Sun and Sayid are with the Locke and Ben in the present time.
I think one of the reasons is that the writers want to keep Jin and Sun separated for a little while longer until we end up with a Desmond/Penny type reunion. But this of course does not sit to well when it comes to the actual story of Lost so how about this …
Remember the list back in season 2 only certain people were on? I think Ben mentions this list was given to him by Jacob. Well Jack, Kate and Hurley were all on this list, while Sayid and Sun were not.
Coincidence? Maybe, but if the 05 are indeed in different times, it could be a possible explanation as to why.