What is on tap for Sam and Dean this Friday on Supernatural? In a word: fairies.

Indeed, in "Clap Your Hands If You Believe," Dean gets abducted from a crop circle. When he wakes up, he's shocked to discover that aliens were NOT the one behind the kidnapping.

But, wait, there are more creatures on the way! Sam investigates and discovers an unusual world... full of elves, gnomes and a leprechaun. Intriguing enough? Check out the official CW preview below, followed by a clip from this episode:

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