The final Cylon is pretty obvious, yet no one has gotten it. One of the rules of writing a story is that if someone or something is mentioned in a story, that person or thing is always brought back up later to play an important role in the story. For example, if the writer takes time to describe a lamp in a story, later that lamp plays a role in things. Perhaps a hundred pages later it is used to knock someone over the head and kill them. Same thing with a person. So, who is the one person hinted at for the entire series but never seen? Who is the one person that was "killed" that everyone misses but no one has seen? We've already had one cylon, Leoban, tell us Adama is a Cylon. Why does everyone disregard this as a Cylon trick? I think we all get to meet Zak Adama, brother of Lee before this whole thing is over. Otherwise, it would violate the old rule. Talk about a bitter-sweet reunion!