Tension in Grimm Season 4 is escalating after yesterday's Episode 19 revelation that Nick is fathering the child of Adalind as a consequence to her pretence that she was the Grimm's fiancee.
A promo video to next Friday's episode 20 reveals how Juliette's transformation into a Hexenbiest worsens over this admission and it looks like she is losing her grip on her humanity as she finally breaks up with Nick.
In the NBC Grimm Season 4 spoilers to "You Don't Know Jack" homicide detective Nick Burkhardt and his Grimm ally Monroe look into a gruesome murder which apparently point to Juliette Silverton's involvement.
"Juliette...has crossed the line," goes the blurb and so the Grimm goes after her.
The teaser shows the character played by Bitsie Tulloch hinting at "burning some bridges" as Juliette declares "a little payback" with her new ally.
Nick (David Giuntoli) finally faces Juliette in a showdown with the Grimm and tells him off, "When are you all gonna learn that I like who I am?"
To this the Grimm replies, "Well we don't" while pointing a gun at her.
The next scene has Nick pointing his gun at his best friend Monroe (Silas Weir Mitchell) while Rosalee (Bree Turner) pleads with Nick to stop. But Nick can't stop as Juliette uses her powers to get the Grimm to shoot his friend, "She's doing it. I cannot stop it."
The Grimm series about a detective who inherits the Grimm mission to hunt down supernatural creatures also stars Russel Hornsby as detective Hank Griffin and Sasha Roiz as Captain Sean Renard.
More spoilers to the Grimm Season 4 Finale episodes indicate the continuing investigation into a series of murders which leads people to ask if a new Jack the Ripper has reached Portland.
The all new Grimm Season 4 episode 20 airs next Friday at 8pm on NBC.
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