I don't know if this "counts" as a spoiler, to refer to "missing pieces" scenes on abc.com . . . there's a missing pieces scene in which Jack's dad is on the island and he sends the dog after Jack -- it's just before the very first scene in episode one. So, does this mean that somehow the island brought him back to life, and then somehow he goes back with the rest and he is alive in the flash forward? Or, does it confirm the time travel theories and somehow he's travelling forward in time after he's dead? Or, does the island have good vibes for ghosts? I'm very confused . . .