There's going to be an epic serial killer party in an upcoming episode of FX's American Horror Story: Hotel.

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Two-part Halloween episodes are an American Horror Story tradition at this point, but the upcoming Hotel two-parter could be the bloodiest yet. The Halloween episodes this year are called Devil's Night and feature a convergence of some of the most notorious serial killers of all time.

The episode will feature Detective John Lowe (Wes Bentley), who is a guest at the Hotel Cortez, being invited to a very special dinner party.

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"The biggest serial killers of all time all come to the hotel," AHS boss Ryan Murphy told Entertainment Weekly recently. "[John Wayne] Gacey. Aileen [Wuornos]. John Lowe's invited to a devil's night dinner. He thinks someone is pulling a huge prank on him. It's the biggest serial killers of all time in a room with him and he has to figure who is trying to make him lose his mind."

The most infamous serial killers ever in one room? What could possibly go wrong?

Next up, in the second part, Darren Criss guest stars as a hipster who checks into the hotel with his girlfriend. But the Hotel Cortez is not exactly up to their impossible standards.

"They're horrified they can't get their artisanal cheese and they hate the sheets and they put Iris [Kathy Bates] through the wringer and she's not happy," Murphy said.

Knowing this show, it's probable that the pair of hipsters will wind up dead. Regardless, this should be a fun couple of episodes full of quality guest stars.

American Horror Story: Hotel premieres Wednesday, Oct. 7 at 10 p.m. ET/PT on FX.

Tags: American Horror Story television fx