Originally on the low-traffic 9 PM Friday slot, NBC’s fairy-tale-criminal-investigation-horror series Grimm is getting popular enough to gain a better time.

Or a tryout, anyway. NBC has decided that Thursday, December 8th will mark a trial run of a new Grimm episode. The 10 PM slot gets more viewers than the 9 PM Friday, so with the growing popularity of Grimm, NBC is hoping to gain a bigger following.

“This series is turning the traditional procedural drama on its head and is attracting a loyal following for us on Friday nights,” says NBC chairman Bob Greenblatt. “We love where it’s going creatively and we’re excited to deliver more episodes to our audience.”

Grimm did way better than expected with its debut, and it’s even more popular on DVR. It has become the only NBC drama with a full season order.

The show is about a homicide detective who finds out he’s descended from a long line of Grimms, special forces that keep the line clear between humans and magical creatures. Solving mysteries involving everything from werewolves to evil rats, the detective also has to keep this half of his life hidden from his fiance’ and investigative partner.