Grimm Season 4, Episode 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. Guest Stars: Danny Bruno, Rachael Perrell Fosket, Franchesca Agramonte, Lowell Deo, Garcelle Beauvais, Nico Evers-Swindell,

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