What scares the creatures of Grimm? Find out in an exclusive clip

Just in time for Halloween, we get this Grimm exclusive from NBC. Want to know what scares the children of Wesen (aka the creatures on Grimm)? What spooky cautionary tales keep the little monsters up at night?

Here's an exclusive clip from Friday night's episode of Grimm, "The Hour of Death." In it, Blutbad Monroe gives his cop friends, Hank and Nick, a Grimm, some insight into his kind and what they're really afraid of.

Grimm airs on NBC on Fridays at 9 p.m. ET.

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