In last night's Lost finale, Future Kate received one hell of a creepy phone call before having one hell of a creepy encounter with Claire, who was hovering over Toddler Aaron and telling Kate, "Don't bring him back!" But who was on the phone? The trusty commenters at Lost-forum.com decoded it in a matter of seconds, of course:

Who is it? Sounds like Christian to us, but others are arguing it's Ben, Locke, or even Richard. And what's he telling Kate? That she needs to come back to the island. And who is the walrus? The walrus is Paul.