Rogerio Kioshi wrote:Did they die when the airplane crashed in the island? Actually they were ghosts?
No. And yes.

Well, none of the regular characters died when the airplane first crashed. All of them died eventually, but for some of them it was long after the end of the series - in the future. For at least one character, it may be
very far in the future. Some of the scenes - the ones where everyone was dressed up and going to a funeral, not on the island - were really in "heaven", or Purgatory, or some sort of afterlife where everyone got to meet up after they died. But when we saw Jack die lying in the bamboo forest, with the dog next to him, that was really his death. And it was definitely
not part of the original plane crash. Although the setting was the same (the bamboo forest), Jack was dressed very differently than he was in the original plane crash. And if that was the original crash, how could he have seen a new plane fly away overhead? No, the final scene was designed to be very similar to the first scene of the series. But it was not the same scene.