Warning! This article features spoilers from episode 4 of Sleepy Hollow.

Pandora has proven her power to unleash some serious supernatural forces this season on Sleepy Hollow. And if last night's episode that featured a demented version of the Tooth Fairy tells us anything it's that she is just getting started.

And next week Ichabod Crane (Tom Mison) and Agent Abbie Mills (Nicole Beharie) will have to enlist the help of another popular TV duo—Temperance Brennan (Emily Deschanel) and Seeley Booth (David Boreanaz).

That's right, the episode we've all been waiting for, the Sleepy Hollow and Bones crossover, debuts next week as part of the two-part Halloween special.

The crossover event actually starts at 8 p.m. with the special Bones episode titled "The Resurrection in the Remains," then continues on to the Sleepy Hollow hour at 9 p.m. with the episode titled "Dead Men Tell No Tales."

In the promo for the crossover episodes, the two teams find a "history-making discovery," where they will have to work together to solve a mystery. In the Bones hour, Ichabod and Abbie visit the Jeffersonian to recover some remains from Brennan and Booth.

"At a certain point midway, when we pass off from their episode to our episode, the supernatural really kicks in and it's like looking at two sides of the same coin," Sleepy Hollow show runner Clifton Campbell told Variety. "You see what we were starting to sense in their hour get on its feet and come to life in our hour, and it requires a reunion of this brand-new coupling to take us to the conclusion that we need on our side, and it reveals a lot about both characters."

While Brennan will be intrigued by our beloved lead Sleepy Hollow character from the past, we'll also get great reactions from Booth.

The official synopsis for "Dead Men Tell No Tales" is as follows:

With Brennan (Emily Deschanel) and Booth (guest star David Boreanaz) in town, Abbie and Crane set out to prove that supernatural forces are at play when a mysterious death plagues the FBI. As Pandora unleashes a force to awaken the dangerous Red Coat, General Howe, both teams must find a way to save the town from the British Army of the Undead. Can the power of Booth and Brennan combined with Abbie and Crane be enough to stop Pandora's evil forces?

Watch the promo for the Bones and Sleepy Hollow crossover below. The two-hour event starts at 8 p.m. EDT Thursday, Oct. 29, on FOX.

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