“Every character that the show’s featured so far had a reason for being in Australia, and all of those reasons involved confronting demons. Most of them didn’t do a good job of it, and the island is their next chance. (Insert notions of sorting things out in purgatory you didn’t get sorted out in life here.) Their demons are keeping them from being the good people they can be, and they’ll need to overcome them to realize their potential. [Spoilers ahead.]”
David continues with some thoughts on Jack, Kate, Charlie, Sun, and others.