"Grimm" Season 4, Episode 9 premiered on Jan. 16 on NBC. Returning from a 5-week hiatus, the week's new episode quickly picks up from the events in Grimm 4x8 ("Chupacabra"). In Episode 10, Monroe faces the Wesenrein tribunal, while Sgt Wu and Juliette start living their new realities and dynamics.

Spoiler alert: This update contains "Grimm" Season 4 spoilers. Read at your own risk.

"You're charged of marrying outside your bloodline," the Wesenrein tribunal tells Monroe (Silas Weir Mitchell) in "Grimm" Season 4, Episode 10 ("Tribunal"). The same tribunal is against Monroe's friendship with Nick Burkhardt (David Giuntoli).

Meanwhile, Sgt Wu (Reggie Lee) gets an official introduction to Wesens in "Grimm" Season 4, Episode 9, while Juliette (Bitsie Tulloch) tries to deal with her transformation to a Hexenbiest in the same episode. These changes are expected to significantly change the realities and dynamics in the NBC series.

A promo video for Grimm 4x10 hints Monroe is facing a death sentence from the Wesenrein Tribunal. The same Grimm promo clip says Nick "must cross the line" to save Monroe. Nick laments in the same clip that his badge is getting in the way.

Rosalee (Bree Turner) is getting more restless by the minute, but Juliette is being supportive despite the rants. The two are working on a Wesenrein list previously provided by Trubel (Jacqueline Toboni). This list could reveal that someone in Monroe and Rosalee's wedding betrayed the couple. "Grimm" Season 4, Episode 10 is expected to bring these ladies into a Wesen hunt of their own.

In Vienna, Viktor (Alexis Denisof) tells Adalind (Claire Coffee) that they're going to Portland to find out baby Diana's whereabouts. Kelly Burkhardt (Mary Elizabeth Mastrantonio), the baby's custodian, has yet to appear in "Grimm" Season 4.

As "Grimm" Season 4 moves forward, Wu is expected to constantly help Nick and Hank (Russell Hornsby) to solve Portland PD's Wesen-related cases. Wu's brief talks with Captain Renard (Sasha Roiz) suggests more interaction between the characters, although Renard refuses to discuss his Wesen-hood with his subordinate.

WATCH: 'Grimm' Season 4, Episode 10 (NBC on YouTube)


"Grimm" Season 4, Episode 10, titled "Tribunal," airs Jan. 23 on NBC.

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