Promotional Photos for Grimm episode 4.20 "You Don't Know Jack"

NBC has released the official Promo Photos for the Grimm episode 4.20 "You Don't Know Jack"

GRIMM -- "You Don't Know Jack" Episode 420 -- Pictured: Bitsie Tulloch as Juliette Silverton -- (Photo by: Scott Green/NBC)

GRIMM -- "You Don't Know Jack" Episode 420 -- Pictured: (l-r) Reggie Lee as Sgt. Wu, Silas Weir Mitchell as Monroe, Russell Hornsby as Hank Griffin -- (Photo by: Scott Green/NBC)

GRIMM -- "You Don't Know Jack" Episode 420 -- Pictured: David Giuntoli as Nick Burkhardt -- (Photo by: Scott Green/NBC)

GRIMM -- "You Don't Know Jack" Episode 420 -- Pictured: Reggie Lee as Sgt. Wu -- (Photo by: Scott Green/NBC)

GRIMM -- "You Don't Know Jack" Episode 420 -- Pictured: Sasha Roiz as Captain Sean Renard -- (Photo by: Scott Green/NBC)

GRIMM -- "You Don't Know Jack" Episode 420 -- Pictured: (l-r) David Giuntoli as Nick Burkhardt, Sasha Roiz as Captain Sean Renard, Russell Hornsby as Hank Griffin, Reggie Lee as Sgt. Wu -- (Photo by: Scott Green/NBC)

GRIMM -- "You Don't Know Jack" Episode 420 -- Pictured: Sasha Roiz as Captain Sean Renard -- (Photo by: Scott Green/NBC)

GRIMM -- "You Don't Know Jack" Episode 420 -- Pictured: (l-r) David Giuntoli as Nick Burkhardt, Claire Coffee as Adalind Schade -- (Photo by: Scott Green/NBC)

GRIMM -- "You Don't Know Jack" Episode 420 -- Pictured: Claire Coffee as Adalind Schade -- (Photo by: Scott Green/NBC)

GRIMM -- "You Don't Know Jack" Episode 420 -- Pictured: (l-r) David Giuntoli as Nick Burkhardt, Claire Coffee as Adalind Schade, Bree Turner as Rosalee Calvert, Russell Hornsby as Hank Griffin, Silas Weir Mitchell as Monroe -- (Photo by: Scott Green/NBC)