What are the metaphysics of time travel?
How can Hurley exist in two places at the same time?
What does it mean for something to be possibly true in the flash-sideways universe?
Does Jack have a moral obligation to his father?
What is the Tao of John Locke?

Dude. So there's, like, this island? And a bunch of us were on Oceanic flight 815 and we crashed on it. I kinda thought it was my fault, because of those numbers. I thought they were bad luck. We've seen the craziest things here, like a polar bear and a Smoke Monster, and we traveled through time back to the 1970s. And we met the Dharma dudes. Arzt even blew himself up. For a long time, I thought I was crazy. But now, I think it might have been destiny. The island's made me question a lot of things. Like, why is it that Locke and Desmond have the same names as real philosophers? Why do so many of us have trouble with our dads? Did Jack have a choice in becoming our leader? And what's up with Vincent? I mean, he's gotta be more than just a dog, right? I dunno. We've all felt pretty lost. I just hope we can trust Jacob, otherwise ... whoa.

With its sixth-season series finale, Lost did more than end its run as one of the most talked-about TV programs of all time; it left in its wake a complex labyrinth of philosophical questions and issues to be explored. Revenge, redemption, love, loss, identity, morality—all of Lost's key themes are examined in this fully updated guide, which reveals the deeper meaning behind every twist and turn in this historic, one-of-a-kind show.