Grimm S04E20 Synopsis: You Don''t Know Jack (5/01)

A SERIES OF CONNECTED MURDERS LEAD EVERYONE TO THINK A COPYCAT IS ON THE LOOSE - 

GARCELLE BEAUVAIS AND NICO EVERS-SWINDELL GUEST STAR - 

A string of homicides have the press asking Captain Renard (Sasha Roiz) if a Jack the Ripper copycat has arrived in Portland. While dealing with the investigation, Nick (David Giuntoli), Hank (Russell Hornsby), Monroe (Silas Weir Mitchell) and Wu (Reggie Lee) deal with a situation they never expected. 

Meanwhile, Adalind (Claire Coffee) and Rosalee (Bree Turner) must work together on a last ditch attempt to fix Juliette's (Bitsie Tulloch) condition. 

Elsewhere, Juliette decides to help her new ally even if it means hurting those around her.

GRIMM -- "You Don't Know Jack" Episode 420 -- Photos by: Scott Green/NBC