Castiel is one lucky angel.

Sources confirm that Supernatural is casting for Rachel, a beautiful young woman who will serve as this character's sidekick. Michael Ausiello teases that she'll possess a "finely tuned BS detector."

In other storyline news, Sam and Dean will travel back in time later this season.

Once there, they'll come across Samuel Colt, a familiar name in Supernatural lore. He constructed the world's largest devil's trap, as well as a gun that can kill anything.

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