Before the fifth season of Lost was aired, the screenwriter revealed that an important character would die, and the multiple foreshadowings in the previous episodes will gradually be gathered and the mystery will be slowly revealed. This season mainly tells the story of "Why the six people who left the island want to go back." Although Lost already has a general framework of six seasons, the challenges of the fifth season are not small. After so many conflicts in the fourth season, the rhythm and explosive points of the plot may slow down. There are still many mysteries to be revealed in Lost, which is what fans have been concerned about. Unlike the previous flashback and flashforward narrative methods, the fifth season is mainly based on the narrative method of life outside the island and on the island.