'Grimm' season 6 spoilers: Wu's life in danger, Juliette continues to get revenge in episode 21 'Headache'

Grimm NBC

"Grimm" is two episodes away from the season 4 finale and the trailer for the penultimate installment suggests that these episodes will be nothing but "mind-blowing." Juliette has gone so far out on the dark side that it makes viewers question if she will ever find her way back. 

Episode 22 titled "Headache" lives up to its name. Juliette pushes through with her plans to quench herself from her raging vendetta and refuses Monroe's and Rosalee's offer to help her. 

In the previous episodes, fans witnessed how Juliette did everything in her power to stop herself from becoming a Hexenbeist. But now, the veterinarian vows to live this way for good. This, of course, is a disaster (not that what's happening isn't troubling enough). In her quest to get her sweet revenge on Adalind, she again forges and "solidifies" a new alliance and viewers will see how that team-up works out for the vengeance-driven witch. 

On the other hand, Nick and Hank are out looking for the perpetrator of a spine-tingling murder before a killing spree sets off. But as the two inch closer to unearth the identity of the person responsible, Wu finds himself in harm's way.

The trailer for the episode hints that Nick and Hank's pursuit target won't be easy to deal with. Also, fans are promised of a creepy installment as the footage ends with screams of shock and helplessness, which are always a bad thing. 

Lastly, the next episode marks the return of Trubel to Portland and no one sees it coming. It is still unknown what her agenda or what news she bears but here's to hoping that it is not something trouble-inducing. 

"Grimm" season 4 episode 21 "Headache" will air on May 8.

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