The finale is tonight, so it's time for me to share the prediction heretofore only shared with Stank troll Chris.
Destroyed EarthI thought this had an outside chance of coming true until last week's revelation of a black hole "singularity." Now? Inside chance.
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Unfamiliar Cylon models found amongst the human corpses
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A lot of babble about "this has all happened before and will happen again"
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Star Trek writers
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Time travel, where the corpses found on earth are actually the descendants of our latter-day human and Cylon characters. The final five plus Baltar and his harem would make sense.