- David Giuntoli (Nick Burkhardt)
- Silas Weir Mitchell (Monroe)
- Russell Hornsby (Hank Griffin)
- Sasha Roiz (Sean Renard)
- Reggie Lee (Drew Wu)
- Bree Turner (Rosalee Calvert)
- Claire Coffee (Adalind Schade)
- Elizabeth Tulloch (Eve)
Grimm — S4E20
Episode: You Don't Know Jack
Air Date: 2015-05-01
Runtime: 43 min
Overview
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.