A/N: The Gunslinger in this story is not the one from the Stephen King novels, it is from the classic 1973 movie "Westworld" starting Yul Brynner. This is a BTVS/Westworld crossover fanfic, but ff. net has no entry for that movie, so I've listed it as simply a BTVS fic

1630 Revello Drive Sunnydale, October 31st 1997

Moving inhumanly fast, Angel kicked the monster's eye on its arm. It roared and its claws slashed at him. He dodged the claws and then punched the monster in the face, sending it flying out the back door of the kitchen and into the backyard. Angel hurried outside, grabbed a nearby rake and impaled the monster in the chest with the wooden end. The monster instantly burst into flames, before it turned into a dead human.

"What the hell?!" Angel exclaimed to himself, before the human corpse collapsed into dust. "Now I've seen everything..."

Elsewhere, Willow, Cordy and Buffy arrived at the school library. "Giles, we got big trouble in little Sunnydale!" Cordy called out, after they slammed through the double doors.

Willow just rolled her eyes, as she let go of her best friend. Unnoticed, Buffy walked to a table and picked up a book. { My, what tiny and yet neat handwriting... }

Giles burst out of his office, looking concerned. "Trouble? What kind of trouble?!"

Speaking quickly, Willow and Cordy told him what was going on around town. Namely, how some of the townspeople had become their Halloween costumes. "It's totally freaky, Librarian Guy, what going on?" Cordelia demanded.

"Err, it sounds like... oh dear, c-chaos magic must be at work here," Giles sighed to himself.

"What is that, Giles?" asked Willow.

"Exactly what its name implies, Willow."

"Who could be behind this, Giles?" asked Cordy.

"I don't know. Yet," the Watcher said, before heading towards the shelves. "I...Buffy? What are you doing?"

Elsewhere, Spike finally got to his feet. His clothes were ruined from the Gunslinger's bullets, and his hand was still hurting like hell from where he'd punched the android. "That little wanker will pay for this!" he vowed. "Maybe not tonight, but soon. Oh, yeah, he'll pay alright!"

William the Bloody pulled out a pack of cigarettes from his bullet-ridden duster. Taking out a cigarette, he put it in his mouth and lit it. Spike then left the alley and headed home to Drusilla. "Hell with this..." he grumbled to himself, upset that he'd yet to get his hat trick of Slayer kills.

Back at the library, Giles had noticed Buffy had been acting strangely since Willow, Cordelia and she got here. "What's wrong with Buffy?" the Watcher asked, noticing the frightened look on his Slayer's face.

Cordelia shrugged, obviously not caring. But Willow said, "Buffy's possessed, Giles. She thinks she's a noblewoman from 1775!"

"I am most surely not possessed, for that is the Devil's work!" the noblewoman declared, in that annoyingly soft and British-accented voice.

Giles was startled to hear his Slayer speak that way. He then said to the redhead, "Willow, what-?"

"I don't know, Giles! All I know is Buffy got her costume at the same place Xander and I got ours, and now she's like - this!" the computer hacker grumbled.

"What, err, where did you get your costumes from?" Giles asked.

"The new place in town. Ethan's Costume Shop. Some creepy-looking guy named Ethan Rayne..." Willow started to say.

"Ethan Rayne?! He's the one behind this? I should have known. There's no time to waste, we must stop him!" Giles shouted with anger in his eyes, causing all three girls to recoil on instinct.

"C'mon, then, let's go. I want the madness to just end, already!" Cordelia declared. Grabbing the confused and hesitant noblewoman, the gang left the library heading to the Watcher's car in the parking lot.

"A demon! A demon!" the possessed Buffy screamed at the sight of vehicle, before she fainted.

"Oh, joy. Willow, you grab her feet, I'll grab her shoulders. Giles, open the damn rear door!" Cordelia demanded angrily.

They quickly managed to stow the unconscious Buffy into the back seat, and then drove off. On the way to Ethan's store. Willow asked Giles how he knew Ethan. The British man obviously didn't want to answer, but eventually replied, "Ethan and I knew each other a long time ago. We, err, we did a lot of things w-we shouldn't have done with magic, in our early twenties."

"Whatever. Look, what are we going to do about Xander?" Cordy asked with a heavy sigh.

"What? What's wrong with Xander?" Giles sent her a worried look, before returning his attention to the night time traffic.

"The Dorkhead was acting just like Buffy," Cordy replied. "He dressed up as a cowboy, y'know, a Gunslinger. And now, he really is a black hat!"

"Good Lord!" Giles exclaimed in shock. "We'll, um, we'll have to track him down, I-I-I suppose. But, but after we stop Ethan's nefarious scheme."

At Ethan's costume store, thanks to Jareth's manipulations - the Gunslinger smashed his way through in through the back and aimed his revolver at Ethan!

"Wait, don't shoot me!" Ethan cried out, flinging his arms up. { Bloody hell, THIS wasn't part of the plan! }

Angel, who had been following Xander after seeing him open fire on another cowboy and killing the man in cold blood, managed to stop the possessed teen from killing Ethan by tackling the Gunslinger to the floor. They hit the Janus statue along the way, causing it to shatter and end the spell! Ethan took advantage of this to run for it, of course, but Angel ignored that.

"Xander? You okay?" the ensouled vampire demanded, briefly distracted by the ozone-like smell of the strong magicks in the back room.

"What-?" the no-longer-possessed Xander started to splutter, before all the memories came back.

He remembered shooting and killing so MANY people... so naturally, Xander's sanity started to shred itself apart. "No, no, no..."

That was, however, when Jareth appeared, stopping time with just a thought.

"You will not go insane from the events of this night, Xander Harris. That does not feature as part of my plans, after all."

Thus, Jareth erased from Xander's mind the memory of everything that had happened for the past few hours. He even made Xander forget that he had ever been a robot. The demon then teleported Xander and Angel back to their homes, before unfreezing time and leaving the costume store.

Having heard the noise just before running out of the store, Ethan returned to the back room to see the broken Janus statue on the floor in little pieces. Nothing else, though - no Gunslinger, no black-clad vampire, nothing.

{ What the hell happened?! } Ethan wondered, before suffering an acute attack of no curiosity and swiftly departing his place of business.

A few minutes later Giles, Willow, Cordelia and a no-longer-possessed Buffy entered the shop - quickly making their way to the back of the store and stopping at the doorway, with questioning looks on their faces.

There was nothing to see, after all, but the broken bust of Janus in little pieces...