The twist was unexpected and welcome though I'm sorry to see Mark Valley go. He never seems to get steady work.
Is he really gone though? I guess listing him among the main cast and having him in the promo shots would be great misdirection, as opposed to the "guest star" who seems to have a lot to do in the pilot so you know he or she isn't long for the show.
Were they going to reanimate him at the end? Or do the brain wave communication thing?
Plus there was that scene from the future episodes montage.