Jack's back!

Or at least that's what it seems like on Friday's all-new Grimm (8/7c, NBC). Captain Renard suspects a copycat is on the loose who's inspired by famed serial killer Jack the Ripper after a string of homicides hit Portland. As Nick investigates, he comes across a big surprise.

Spoilers on all the must-watch finales

Meanwhile, Adalind's pregnancy is progressing rapidly, and well, see for yourself how she's doing in the exclusive sneak peek below:

Grimm airs Fridays at 8/7c on NBC.