Ichabod Crane, Abbie Mills, Temperance Brennan, and Seeley Booth walk into a bar.

No, this isnt the setup for a joke.

Ahead of Halloween, the worlds ofSleepy HollowandBoneswill collide for a rare genre-bending crossover.

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Credit: Tina Rowden/FOX

What a stupid idea.

But it wont be that easy.

Were definitely hiding more of what our intentions are in their hour, Beharie says.

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Tina Rowden/FOX

For Abbie, thats a little bit of a problem because she doesnt want her cover blown.

She wants to be able to still fight evil, but still have a career.

Thats made especially difficult since Booth and Ichabod dont like each other instantly, according to Mison.

It makes for quite a nice dynamic.

For the record, Boreanaz insists Booth would win in a fight.

Hes just got a faster draw, he says.

But Mison counters, Crane has been punched in the face by death.

Ichabod and Brennan, however, are a different story.

Theyre very,verysimilar, Mison says.

So similar, in fact, theyre always trying to one-up each other intellectually.

That makes for a good battle.

Theres a moment where Crane is nearly busted, Mison says.

Its one of those nice moments where he has to talk himself out of it…

While the characters dont get along, the actors themselves dont feel the same way.

Its great working with them, Boreanaz says.

Theyre a lot of fun.

Viewers expecting the two shows to bend toward each others genres, however, may be sorely mistaken.

The two parts are very different tonally, Mison says.

Its fun to see those worlds collide, Boreanaz says.

Its like a Ghostbuster moment.

Brennan reacts in awe as the wall slides back.

We dont have this onBones, Deschanel quips between takes on the set built especially for the crossover.

Walls dont move like this.

But one question remains: Will the crossover make the ratings move, too?

Boreanaz, for one, is hopeful.

TheBones-Sleepy Hollowcrossover event airs Thursday at 8 p.m.