Supernatural answered a lot of major questions about season 6. We know Crowley brought Sam and Samuel back to Earth to help him collect Alphas to find the location of Purgatory and we know that Crowley has Sam's soul. But there's still one big question: Where did the Alphas come from?
Which of my theories sounds the best, or am I completely off-base? Who do you think the Alpha Mother is, or was the Alpha Vampire just messing with the Winchesters?
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