“You Don’t Know Jack” is the title of the new episode of Grimm airing tonight (May 1) at 8PM on NBC.

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.
NBC has released a handful of images to promote the episode, and you can find those below. Enjoy: