A string of homicides have the press asking Captain Renard if a Jack the Ripper copycat has arrived in Portland. While dealing with the investigation, Nick, Hank, Monroe and Wu deal with a situation they never expected. Meanwhile, Adalind and Rosalee must work together on a last ditch attempt to fix Juliette's condition. Elsewhere, Juliette decides to help her new ally even if it means hurting those around her.
| Title | Grimm - Season 4 Episode 20 You Don't Know Jack |
|---|---|
| Year | 2017 |
| Genre | Drama, Mystery, Sci-Fi & Fantasy |
| Country | United States of America |
| Studio | NBC |
| Cast | David Giuntoli, Silas Weir Mitchell, Russell Hornsby, Sasha Roiz, Reggie Lee, Bree Turner |
| Crew | Clinton Wayne (Special Effects Key Makeup Artist), Neal Sopata (VFX Artist), David Greenwalt (Executive Producer), Richard Marvin (Original Music Composer), Dan Schaefer (Storyboard Artist) |
| Alternative Titles | GRIMM／グリム, GRIMM グリム |
| Keyword | detective, fairy tale, police, supernatural, creature, police detective, homicide detective, neo-noir, fighting supernatural |
| First Air Date | Oct 28, 2011 |
| Last Air date | Mar 31, 2017 |
| Season | 6 Season |
| Episode | 122 Episode |
| Runtime | 45:14 minutes |
| Quality | HD |
| IMDb: | 8.27/ 10 by 3,199.00 users |
| Popularity | 243.957 |
| Language | English |
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