By Sandra Gonzalez
Updated January 30, 2012 at 04:11 PM EST

We should have expected this, considering the show’s titled Grimm, but the case-of-the-week on this Friday’s episode really outdoes itself in the ick department.

On the episode, titled “Organ Grinder,” Nick (David Giuntoli) finds out the creature world has a unique use for human organs. The episode guest features Spy Kids star Daryl Sabara, and is a spin on the tale of Hansel and Gretel. But after you see the exclusive clip below, our guess is that you’d take your chances with the old lady and her oven.

The episode airs this Friday at 9 p.m. ET, on NBC.

Read more:

Meet the foxy new ‘Grimm’ hire

‘Spy Kids’ star coming to ‘Grimm’ for Hansel & Gretel episode — EXCLUSIVE

‘Grimm’ in EW’s Spoiler Room