I remember visiting this website once...
It was called Lost - 14 TV Cliffhangers and How They Were Resolved - EW.com
Here's some stuff I remembered seeing:
Get behind-the-scenes insight each week during season 6
saw one of its biggest cliffhangers at the end of the show’s third season. The crash survivors found themselves in conflict with the Others, finally battling it out at camp. Amid mass confusion, deaths, and horrifying combat scenes, the fight is interspersed with a series of time-flashes — including the twist that the events in question happened after a group of Oceanic 815 passengers had gotten off the island.
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