When Tess inadvertently activates the mysterious Kryptonian Knowledge crystal found in the Artic, it emits a high-band beacon which summons an alien queen, named Maxima, ...

Dean and Sam press their luck in a winner-takes-all game of pool. Meanwhile, Castiel hunts down a would-be murderer, but not for reasons one might think. ...

Sam continues to try to save Dean from the Mark of Cain. Realizing that Dean's antics are causing problems for him in hell, Crowley seeks help from a reluctant Castiel. ...

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