The one thing I don't get it how Colonel Tigh can be a Cylon. He served in the first Colonial War, presumably back when Cylons were only the big metal monsters and not in human form. How could he be planted in a war, never becoming "active"/aware during that entire war (which presumably the Cylons wanted to win but apparently were already thinking to the NEXT war 40 years later?), and then end up on a ship that was likely to survive the surprise attack? I like the plot twist, but it's seriously stretching it.

What say you?