Just caught up on the new Battlestar Galactica too, which is maybe the Wire of sci-fi television. I'm guessing Helo is the last cylon.
Not possible. Helo had a child with a cylon, and cylon's cannot reproduce amongst themselves.
God I'm a dork.
Who knows if that applies to the final five though. But it's got to be either him, Roslin or Gaius. Only main characters on the Basestar when Deanna says, "Only four are with your fleet." And I think Roslin would be lame and Gaius is too obvious.
Though if it's him, why wasn't "Watchtower" playing in his head at the nebula. I'll have to think on this.