It isn’t even September but “American Horror Story” fans are pumped about Halloween. Every season the FX mini-series delivers one of its spookiest episodes around October 31, and this year will be no different. Details about the Season 5 “Hotel” Halloween episode have been released, and it’s a storyline that viewers will DIE for.

According to Entertainment Weekly, Halloween will be celebrated with a two-episode installment, just like Season 1. The first half will focus on Lily Rabe’s character, Aileen Wurnos. This will mark the character’s first appearance in Season 5, and it will certainly be memorable – especially for Wes Bentley’s detective character, John Lowe.

“American Horror Story” co-creator Ryan Murphy revealed to EW that John Lowe will be invited to the hotel for a “devil’s night dinner.” The other guests include “the biggest serial killers of all time” – including Aileen Wurnos and John Wayne Gacy.

Aileen Wurno, a prostitute from Florida, is known for killing seven men between 1989 and 1990. She was ultimately arrested on January 9, 1991 for an outstanding warrant, but confessed to the murders a couple days later. She claimed she killed the men in self-defense. Wurno was executed on October 9, 2002. No other details about Rabe’s portrayal of Wurno are known, but Murphy previously dished at the FX summer press tour that she would be “at the centerpiece of that Halloween episode.”

Meanwhile, the actor portraying John Wayne Gacy has yet to be announced. Like Wurno, Gacy is a well-known serial killer, responsible for claiming the lives of at least 33 teenage boy and young men. Also known as the Killer Clown, Gacy’s killing spree took place from 1972 to 1978. Due to the timeline, it’s unclear how “Hotel” will incorporate the serial killers into the plotline. It’s also uncertain if “American Horror Story” will use this “devil’s night dinner” as a way to include season 4 fictional serial killer Twisty the Clown (John Carroll Lynch). The character was said to be based off of Gacy.

Following the frightening dinner party, the second half of the Halloween episode will center on “American Horror Story” newcomer Darren Criss. The “Glee” alum will play a “hipster” who ends up at the hotel with his girlfriend to avoid trick-or-treaters.

“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 told EW of the plotline.

So, does that mean Darren Criss’ character will meet a grim fate? Only time will tell. “American Horror Story” Season 5 premieres on FX on Wednesday, Oct. 7, at 10 p.m. EDT.