When "Grimm" returns this Friday, get ready for an exciting Season 4 finale! "Cry Havoc" (S04E22), which airs May 15 at 8:00 p.m. EST, will see Juliette's alliance bringing her more darkness than ever before. Not to mention, we'll find Nick desperate for revenge. Need some new "Grimm" spoilers? Watch the full promo preview video for the upcoming finale below, plus catch up on the Episode 22 synopsis and more below!

To make the countdown to the finale a little less anxiety-inducing, NBC has provided us with an awesome promo video which previews just what we can expect!

Watch the full preview video below to get a sneak peek of what's next:

"It's going to get ugly," teases NBC. By the looks of the promo video, that's an understatement!

As we previously reported, "A horrifying discovery sets Nick on a war path," teases the NBC press release. Plus, "Jacqueline Toboni and Nico Evers-Swindell guest star," the network announced.

According to the official synopsis for "Cry Havoc" (S04E22), "On the heels of a shocking discovery, Nick (David Giuntoli) is hell bent on getting revenge and taking the fight to the Royals with help from Trubel (guest star Jacqueline Toboni)."

"Meanwhile, Juliette's (Bitsie Tulloch) alliance continues to lead her down a dark path," wrote the NBC synopsis.

Where will her alliance take her next? What (or who) will be sacrificed as she moves further down this road of darkness?

"Russell Hornsby, Silas Weir Mitchell, Sasha Roiz, Reggie Lee, Bree Turner and Claire Coffee also star," explained the NBC press release.

Excited to see "Cry Havoc" yet? What do you think of the latest spoilers revealed in the promo video? Do you have any theories for what else may happen in the Season 4 finale? Make sure to voice your thoughts in the comments section below!

"Cry Havoc," Episode 22 and the finale of "Grimm" Season 4, airs Friday, May 15 at 8:00 p.m. EST on NBC.