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Template:Episode Template:Episode Quote "You Don't Know Jack" is the twentieth episode of Season 4 of Grimm and the eighty-sixth episode overall. It first aired on May 1, 2015 on NBC.
Synopsis
Press Release
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.
Guest stars
Wesen
Videos
Select scene
Production Notes
- Footage from "Pilot", "Game Ogre", "The Kiss", "The Bottle Imp", "Wesenrein", and "Hibernaculum" is reused (flashbacks).
Continuity
- Renard's bleeding side effect from his mother saving his life reoccurs.
- Bud meets Adalind for the first time.
- The first female Klaustreich is seen.
- The trailer is badly damaged, but not all of its contents have been destroyed; subsequently, the remaining items, including some of the Grimm diaries and weapons, are moved to the spice shop basement.
- It is revealed that Lauren Castro did not succeed in her campaign to become the mayor of Portland.
Trivia
- The names of the sent and received emails on Nick and Juliette's computer are of writers and other crew members for the show.
- The last names of the first two murder victims, McDunnah and Casey, both are of Irish Gaelic origin; the killer, Jack, also has an Irish accent and sings an Irish folk song after he kills Henrietta.
- The Irish folk song that "Jack" sings is a slight variation of the song "Some Say the Devil is Dead" by Derek Warfield, with the location in the song, Killarney, changed to Whitechapel; Whitechapel was the location of Jack the Ripper's murders in the late 1880s.
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