Here is the story about tonight's episode -

Dean is stunned after he receives a phone call from his dad who tells him he has a solution to get Dean out of his deal. Sam and Dean fight because Sam is skeptical that it is really thier dad on the other end of the phone and warns Dean not to listen to him but Dean disagrees and sets off on his own path to follow his father's orders.
I can't wait.

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"Double, double toil and trouble; Fire burn, and cauldron bubble. Double, double toil and trouble-- Something wicked this way comes "