Here's something interesting I just found in the transcripts:

MILES: Then you know he's put a lot of time and energy into finding you. So now I've found you. And I can tell him exactly where you are. Or I can lie, and tell him you were already dead. I can do that, for 3.2 million dollars.

BEN: You've arranged this meeting so you could blackmail me?

MILES: (his lips move silently for a moment) It's extortion if you want to get technical.

That is what Miles seems to do whenever he is "talking to" or "listening for" ghosts. Is someone telling him what to ask for? How much to ask for? Can Miles hear the Whispers that were all the rage in season one?

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