Juliette has gone so far that "Grimm" fans are questioning if the veterinarian-turned-Hexenbeist can still be saved or if she wants to be saved. During the course of her transformation, she has lost touch with her humanity and it hs only gotten worse from there. 

Now, it looks like Juliette has fully embraced the new and dangerous form she so intensely detested before. And after learning that Adalind is going to have NIck's child, she finally calls it quits with the detective and starts "burning bridges" and getting a "little payback." 

The new episode will show Juliette leaving a scene of carnage in the city — a killing spree so horrifying the media thinks that a Jack the Ripper copycat is running amok again. 

But Nick, Hank, Wu and Monroe are in for a big surprise as they learn that the killer is no imitator but Nick's revolting former lover. This jumpstarts an ultimate confrontation between them, and based on the promo for the episode, it does not look like it will end well. 

Nick's detective allies are surprised that he is determined to go after Juliette, and the latter is all the more ready to play a little game with them as well. As the former lovers meet head-on, Juliette eventually takes control of Nick, who is shown in the clip pointing a gun at her. 

Easily morphing into a Hexenbeist, Juliette maneuvers Nick's movements by having him point the gun on Monroe instead. Rosalee is horrified and Nick dreads that the death of his comrade will fall on his hands. From the looks of it, Juliette has become helpless and lost, and Adalind finds no other reason to stop herself from helping her.

This week, viewers will see Adalind and Rosalee racing against the clock to "fix" Juliette's situation. "Grimm" season 4 episode 20 titled "You Don't Know Jack" will air on May 1.