One of the taglines for NBC’s GRIMM is “Remember the fairy tales your parents used to tell you before bedtime? Well, those weren’t stories, they were warnings.” After watching the pilot episode the line that came to my mind was from Spielberg’s Poltergeist, “It knows what scares you. It has from the very beginning. Don’t give it any help, it knows too much already.” If you love to be delightfully frightened each week, watch Grimm premiering tomorrow night at 9/8c, on NBC.

If that’s not enough to wet your appetite, watch this preview clip.