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Grimm S4E20 — You Don't Know Jack

8.4

Grimm•Season 4•Episode 20

You Don't Know Jack

8.4/10 · 1,206 votesMay 1, 201543 min

Ranked #10 of 22 in Season 4•+0.1 vs season avg

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

Directed byTerrence O'Hara

Written bySean Calder, Michael Golamco

Previous episodeE19 · Iron Hans Next episodeE21 · Headache

Seasons6

All 1 2 3 4 5 6

Cast8

David Giuntoli

David Giuntoli

Nick Burkhardt

Silas Weir Mitchell

Silas Weir Mitchell

Monroe

Russell Hornsby

Russell Hornsby

Hank Griffin

Sasha Roiz

Sasha Roiz

Sean Renard

Reggie Lee

Reggie Lee

Drew Wu

Bree Turner

Bree Turner

Rosalee Calvert

Claire Coffee

Claire Coffee

Adalind Schade

Elizabeth Tulloch

Elizabeth Tulloch

Juliette Silverton

Crew5

T

Terrence O'Hara

Director

S

Sean Calder

Writer

M

Michael Golamco

Writer

S

Scott Boyd

Editor

Matthew Taylor

Matthew Taylor

Stunt Coordinator

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Episode Summary

"You Don't Know Jack" is episode 20 of Grimm season 4. It scored 8.4/10 from 1,206 votes, ranking #10 of 22 episodes this season (season average 8.3). Directed by Terrence O'Hara and written by Sean Calder, Michael Golamco, it aired on May 1, 2015.

Next: E21 · Headache Best of Season 4