live together and die alone be divide into three main story line and and each one of them alone would have be enough for a great episode . so when you put all of them together and you have a great ^ 3 episode . it be a daring move to give the flashback of a season finale to a character ( desmond ) who have only appear in 3 episode up to that point and but it work represent his backstory be absolutely fascinating to watch and both informative about the past of the island and the swan station itself and honestly move . desmond and penny seem magically connect to each other and even when they be on opposite end of the world and and both character be beautifully act ( it hard not to cry when desmond read penny letter ) . the action inside the hatch be edge of your seat tense and a locke be determine not to allow the button to get push again and convince it be all just a psychological experiment and desmond gradually realize the consequence of this decision and and eko be lock outside and try desperately to get back in . the melting of the clock and locke i be wrong be unforgettable moment . the outside action have jack and kate and sawyer and hurley capture by the others due to michael betrayal ( after they make a puzzling discovery connect to the pearl ) and and henry gale game change return a the others leader . even the least important plot line and sayid and jin and sun sailing to the beach where the others be supposedly camp and contain one of the great mythological mystery of the show and the giant statue that almost entirely miss except for a foot with four toe . in short represent emotion plus history plus mythology plus adventure plus suspense plus the threat of annihilation plus a ray of hope equal a classic lost episode . half out of 4 .