"Grimm" Season 5, Episode 9 airs this Friday on NBC. This week's new episode is called "Star-Crossed," a fitting Valentine's weekend special. This is the third episode where Bitsie Tulloch is playing Eve, the evolved Hexenbiest that took over Juliette Silverton's life. Third time's a charm, so the viewers are going to see a full on Hexenbiest, the network teases on Twitter.

Spoiler alert: This update contains "Grimm" Season 5 spoilers. Read on to know what happens next to the central grimm, Nick Burkhardt (David Giuntoli) and the lives of everyone who matter to him in Portland.

"Eve (Bitsie Tulloch) uses her unique skills to interrogate a suspect," reads the NBC synopsis of "Grimm" Season 5, Episode 9. This interrogation is related to the war between Hadrian's Wall and Black Claw. In a tweet, NBC has hinted this is a special must-watch episode, as Eve is showing her full on Hexenbiest force. Eve was first seen albeit for a quick moment in Episode 6 ("Wesen Nacht"), the winter finale episode of the dark fantasy drama. She comes back in Episode 7 ("Eve of Destruction") where she tests Nick's preparedness for the war. In the most recent episode ("A Reptile Dysfunction"), she reminds Nick that Juliette is dead. She regrets that he was not able to bury Juliette, Eve tells Nick.

Eve was briefly seen in action in Episode 7, but the extent of her powers remains unknown. Here are a few of the things that avid viewers know at this point in "Grimm" Season 5: One, the training that Martin Meisner (Damien Puckler) provided Eve involves finding a sense of purpose. Two, Eve thinks Nick is still too emotional to focus on the Black Claw problem. And three, Eve hasn't introduced herself to Juliette's dear friends before she became a Hexenbiest, Monroe (Silas Weir Mitchell) and Rosalee (Bree Turner). Here are two things that many fans can hardly wait to see: Adalind (Claire Coffee) versus Eve 'biest-off and baby Diana with Eve and Meisner.

"Grimm" Season 5 may be so rich in layers and therefore confusing, but some viewers are not forgetting key questions. For example, where is baby Diana now? She was last seen with Meisner, but it seems he is not keen on telling Adalind that her firstborn is safe with him. Adalind and Nick has recently kissed in rather romantic moment in their new home. However, she has some sparks with Meisner, too. Is a love triangle brewing, or is it a love square with Eve? Most important, at what point in the series will the story on the Seven Keys be concluded?

Jim Kouf has some "Grimm" Season 5 spoilers in connection to the mysterious keys. The show creator and show boss has told Blastr the producers are "going to deal with the keys" in the 100th episode. Episode 9 this week happens to be the 97th episode, close enough to the landmark episode.

"A barbaric Wesen ritual is brought to the present and Nick (David Giuntoli), Hank (Russell Hornsby) and Wu (Reggie Lee) are already five steps behind the serial killer. To aid in the investigation, Monroe (Silas Weir Mitchell) goes undercover," reads the first portion of the "Grimm" Season 5, Episode 9 synopsis. This week's episode was written by Sean Calder and directed by Carlos Avila.

In the NBC teaser, Bitsie Tulloch is referred to as "an old love with new powers." What can the new Juliette do as a full on Hexenbiest? Watch the video tweet below.

After staying mum for a long while, Tulloch is back sharing "Grimm" Season 5 behind-the-scenes (BTS) photos with fans on Twitter. Here is one of them:

More "Grimm" Season 5 spoilers for viewers who missed several episodes: Nick now know where his mother was buried. Meisner showed him her remains just outside of the Hadrian's Wall headquarters. There is some budding friendship between Meisner and Burkhardt now. Meanwhile, Adalind is currently as vulnerable as any non-Wesen human because of a potion she crafted to free Juliette of the Hexenbiest madness. She is now terrified to learn that Juliette is back (although the real Juliette is dead). At the Portland Police, Captain Renard (Sasha Roiz) is unable to focus on the fight against Black Claw because he's been endorsing a mayoral candidate. He has some hidden agenda, Roiz has told Oregon Live.

"Now that the royal family is out of the picture, Renard needs to find other ways to aggrandize himself," Roiz said, noting, reasons for his involvement in political endorsements "will reveal themselves in upcoming episodes very soon." Will this play a big deal in the imminent reveal on the Seven Keys?

'Grimm' Season 5, Episode 10 is called, "Map of the Seven Knights." Now, viewers would know that there are seven keys and seven knights. Now is the best time for fans to tune in and follow what happens next to Nick, Juliette, Adalind and the whole gang.

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