Supernatural took another step on its path toward a larger mythology this week, as Sam and Dean are on solid terms and the season is humming along well.

But will that all change on next Wednesday's "Man's Best Friend with Benefits?"

Check out the official CW promo to get an idea of the next obstacle in the brothers' way, as Kevin returns and is plagued by nightmares... which lead the siblings into the world of witchcraft:

Of course, this world isn't so bad when the witch in question ends up in your hotel room. See what we mean in this sneak peek at the episode:

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.