Grimm: Season 4, Episode 20 - ProjectFreeTV

4 - 20: You Don't Know Jack

In the aftermath of Juliette's attack on the trailer, Nick tries to pick up the pieces while Rosalee and Adalind work together to create a suppressant potion. Meanwhile, a new killer strikes, targeting Wesen women, and the detectives suspect that they may be dealing with Jack the Ripper.