lol dude its not that hard to get. Desmond was in the hatch that they found, he was pushing the button to "save the world" locke gets convinced that they dont need to push the button, so he destroys the computer. The whole world is going to hell, but desmond has the failsafe key, which he turns and saves the day (sidenote, he IS the failsafe key in the final season, correlation)
Charles widmore was the leader of the others, but he has banished by ben Linus, he wanted revenge until the 6th season when his intentions were supposedly good. Widmore killed Benjamin linuses daughter, dick move) He sent the freighter that was under the cover being sent by penny to find desmond
dharma initiative came to the island because they wanted to see why it was special (i.e. electromagnetic activity) A bunch of the people on the original oceanic 815 were trapped there in the 70's, but a lot were also in present day, being off the island when it dissapeared after locke turned the wheel. They became known as the oceanic six, and they go back when eloise tells them a way to go back on the alira flight. She is daniel faraday's mom. She coincidentally shoots him at the end of season 5 in the 70's Oh yeah, Ben kills locke here, so he's dead at this point.
the wheel is sort of the pilot for the island, it harnesses the electromagnetic activity and allows it to move no only in space, but time as well. When Ben pulls the wheel it teleports him to tunisa. The island does not stop flashing through time, allowing the survivors on the island to find jin, who was still flashing thorigh time as well. Locke turns the wheel, the flashes stop, but they stop in the 70's, thats how they end up there
wow im immature, youve tricked me into getting angry on the internet. Touché