The highly anticipated showdown between Juliette and her arch nemesis Adalind will take place when the vengeful Hexenbiest returns to Portland in Friday's all-new episode of "Grimm."

In a sneak peak of the next episode, "Trial By Fire," Adalind shows up at Juliette's doorstep unannounced while Nick is not home. Once she lets herself inside, she confronts Juliette about her role in taking away her daughter, Diana, who is now being raised in secrecy by Nick's mother. She also takes a jab at Juliette by rubbing in the fact that she slept with her boyfriend, Nick. It's only a matter of time before the two women go head-to-head.

"Grimm" star Bitsie Tulloch opened up about Juliette and Adalind's upcoming face-off in a recent interview, telling Entertainment Weekly:

"The thing that all the fans have been waiting for, for four years, is a catfight between Adalind and Juliette. How great is that going to be when it's Hexenbiest on Hexenbiest? That'll happen, and that'll be awesome," the actress said. "Adalind has been making Juliette's life miserable since Season 1. She's not just your gun-toting veterinarian who's threatening but maybe not that threatening. Now she's über threatening and dangerous."

Another preview clip reveals Monroe will not be happy when Nick and Hank turn to an old foe for help in investigating the death of two children who died in a mysterious fire that may have been set by a Wesen.

According to CarterMatt, the synopsis reads as follows:

"When an arson case looks to have Wesen origins, Nick (David Giuntoli) find himself reluctantly having to ask an old foe for help. Elsewhere, Viktor (guest star Alexis Denisof) teaches Adalind (Claire Coffee) the effectiveness of well-played diplomacy. Meanwhile, Juliette (Bitsie Tulloch) finds herself in a confrontation sooner than expected."

"Grimm" Season 4, Episode 13, "Trial By Fire," airs on Friday, Feb. 13 on NBC.

Watch promo videos below.

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