Yeah in Ab Aeterno (I think) Richard was trying to kill himself and Jack sat with him in front of a stick of dynamite. It went out without exploding.
Here's my understanding: Smokey can't kill candidates, but candidates can certainly be killed by others. That's Jack's idea behind the bomb: if Sawyer had left it alone then it couldn't have killed any of them, but if it was messed with then it would be Sawyer killing them, which is exactly what happened.
They're not the same as Richard, but they are protected from Smokey.
That's my understanding. Jacob and his replacement candidates are the stopper in the bottle that keeps Smokey on the island.so... basically, Smokey has to kill off all the candidates to leave the island because then there will be no Jacob left to keep him there?
Wish I knew. He seems to be the guy who can see both timelines, but beyond that I dunno.and what is Desmond's role in all this?
As for the Kwons: I was waiting for Sun to pull out the "You have to leave me so that our daughter is not alone." But she never did. Which is kinda strange and out of character.