'Grimm': An ogre is on the loose, and he wants revenge

grimm-ogre-nbc.jpgGuess what TV series came back just in time to creep you out on Friday the 13th? If you guessed " Grimm," you're right. And now you're probably hiding under your sheets.

[SPOILER ALERT]

In the upcoming episode, a prison escapee ( Eric Edelstein) looks to exact his revenge on Hank ( Russell Hornsby) for sending him to the big house. And he's not just your run-of-the-mill terrifying prison escapee either. He's an ogre.

Things get hairy (no pun intended) for Nick ( David Giuntoli) and Juliette ( Bitsie Tulloch) when the ogre looks to put the hurt on them. This leaves Monroe ( Silas Weir Mitchell) in the awkward position having to actually help a Grimm, his mortal enemy.

It seems that Nick's two worlds are slowly starting to collide. And it's getting increasingly dangerous for Nick and those around him. How long until he cracks?

We'll find out on Friday, Jan. 13 at 9 p.m. ET.

Here's an extended preview clip...

Photo/Video credit: NBC