Disclaimer: I don't own Fullmetal Alchemist or The X-Files. I do own the characters I myself created for this story, not that they're good for anything ¬¬'…

Summary: Due to some unexplained phenomena, Mulder and Scully, two FBI agents with an interesting reputation for working in the X Files, travel through time and end up in Amestris. The X Files is a special FBI division that deals with cases that are considered unsolvable or are related to the supernatural. Col. Mustang is in charge of a murder investigation that is unusual, to say the least. Would Mulder and Scully, having so much experience in dealing with paranormal phenomena, be able to help him in this investigation?

Notes:

1st: Before you start reading this, let me just say that I WILL finish posting the fanfic. It's already complete and as my computer sucks I even have a backup copy. You don't have to worry about me giving up on it or my computer dying.

2nd: This is a FMA TXF crossover. If you know FMA and aren't familiar with The X Files, it's all right. You may not understand some of the jokes, but you'll be able to understand and enjoy the story. If by any chance you know The X Files but don't know FMA, I'd recommend that you look for other TXF fanfics, 'cause you'd be a little lost here.

3rd: English isn't my first language. I actually live in Brazil. If you spot any mistakes or simply a bad choice of words somewhere, please let me know. I won't replace the whole chapter (unless it's something terrible), but I won't make the same mistake again (at least let's hope so…).

Haunted By Nightmares

Chapter 1

It was a cold and rainy night in the end of October. The temperature outside the airplane was cold enough to kill a person, but the passengers aboard the American Airs commercial flight to Atlanta were all well protected from the bad weather conditions. Most of them had already turned off the lights above their heads and were trying to sleep. Dana Scully would try to get some sleep too, if the man by her side would turn his reading light off. She pulled her red hair behind her ear and sighed. Traveling was something common in her life and she had to admit she had already spent too many hours of her life on board of an airplane. Fox Mulder, her partner, was sitting by her side, still reading the reports from the case they were supposed to investigate. The interested look on his face showed that there was something very strange in this case. The FBI had been called to help in a murder investigation and agents Mulder and Scully had been assigned the case.

"Mulder, I thought you had read the reports already." Scully said, suppressing a yawn.

"I did. There are just some oddities in this case." The man replied, taking off his reading glasses and straightening his dark brown hair.

"That's why we were called…" Scully said, looking in his hazel eyes, a little annoyed.

"If you want me to turn off the light so you can sleep, just tell me."

"No, it's okay."

Scully was about to ask Mulder's opinion on some detail of the case when the airplane started shaking. The fasten-your-seatbelts-lights were turned on and a flight attendant's voice came through the speakers.

"Ladies and gentlemen, may I have you attention please? We're currently experiencing some turbulence, so for your safety we ask you to remain seated, with your seatbelts fastened, until we have better flying conditions. If you have any questions, please…"

Mulder closed the file he was reading and calmly fastened his seatbelt. Scully was now looking through the window at the endless darkness outside. Both of them were already used to flying and didn't mind the occasional turbulences. Mulder finally put the files back in his suitcase and was about to turn off his reading light when all the lights in the airplane were suddenly turned off at the same time.

***********

It was early in the morning and the birds were singing hysterically. The sun was shining and it looked like it was going to be a hot day. A mailman was sorting letters in the mailboxes at the ground floor of a small apartment building when a blonde tall man in a military blue uniform rushed in and almost bumped into him.

"Excuse me." The soldier said quickly, before heading to the stairs.

"No problem, sir." he said.

That soldier reeked of cigarette smoke, the mailman thought, as he waved his hand on the air, trying to make the bad smell go away.

The blonde soldier climbed the stairs in a hurry, turned right in the hall of the 4th floor and knocked on the first door. He waited for about 15 seconds and knocked on the door again. After a few more seconds the door opened and a man wearing military pants and a white shirt showed up. He had short black straight hair and was slightly shorter than the man who had just arrived. He didn't have any shoes on and still looked sleepy. Anyone could tell that he was just getting ready for work, but wasn't too excited about it.

"What is it, Lt. Havoc?" The black-haired man asked.

"There's been another murder, Colonel."

Roy Mustang was still young and was already Colonel. That made many people at his work envious of him. He was aware of that, but it didn't bother him. He had subordinates he could trust with his life and who trusted him to look out for them as well.

"Another soldier?" Col. Mustang asked.

"Sergeant Tom Carter was found dead in his apartment near the headquarters." Havoc explained.

"Could anyone determine the cause of death?"

"The medical examiner was called. He must be heading to the scene as we speak, sir."

"Okay, I'll just get some shoes on."

The man went inside and came back a couple of minutes later, completely dressed and ready to go. They got in a car that Lt. Havoc had parked on the street and left for the crime scene.

************

Mulder was lying down on some hard and humid surface. It wasn't very comfortable there. He was thinking of how he had fallen from his bed, when he remembered he wasn't in his apartment. He was inside an airplane, flying to Atlanta.

"Mulder!" A familiar voice called.

"Scully?" He asked, opening his eyes, only to see his red-headed partner, standing up in what appeared to be the basement of an old house. "Where are we?"

"I have no idea." Scully said, still looking around.

"But we were just in the plane! You remember that, don't you? We were flying to Atl-"

"I remember, Mulder. We were flying to Atlanta."

"For some reason I don't think we're in Atlanta…" Mulder said, as he now took a look around.

They were in a dirty basement. There were wooden stairs in the corner of the room and they led to a closed door. The walls were originally white, but now had a yellowish color, as they hadn't been painted for a long time. The floor was made of cobblestones and there was no furniture and no windows. There were a few candles in candlesticks, illuminating the place with a faint light. Mulder then noticed the symbols. There were big circles with some weird writing inside and some drawings that resembled animals, drawn in a very rustic style. There was one of these symbols in each of the four walls of the room. He looked at up and down and found two more symbols, one on the floor and one on the ceiling.

"Scully, were these symbols painted with different colors?"

"Yes… Do you think the door is locked?"

"What colors are they?"

Scully didn't want to talk about the symbols now, but Mulder insisted. The man was red-green color blind, so he couldn't be sure about some of the symbols.

"The symbol on that wall is painted in green as the symbol on that wall across from it. The symbols on the floor and that one on the ceiling are red." Scully said patiently, as she could imagine how annoying it could be to be unable to tell the difference between two colors.

"Interesting…"

Mulder stared at the symbols, completely amazed by them, but Scully wasn't worried about that. She just climbed the stairs and tried the door. To her surprise, it wasn't locked.

"What do you see?"

"Looks like an abandoned house."

Scully instinctively tried to reach for her gun, but then realized she wasn't carrying one. Even an FBI agent wasn't allowed to carry a gun with them inside the airplane cabin. Mulder stepped ahead of her, thinking it would be his duty to protect agent Scully if they were attacked, shot, or anything. He was almost disappointed. There was just nothing. The house was empty. They got to what appeared to be a living room and there were windows and a door. The sun light illuminated the whole place, but even that didn't make it look nice. The walls were dirty, the floor was covered in dust and there was no furniture. The only thing they spotted, as soon as they got in the room, were footprints on the dust layer.

"Seems like someone was just here." Scully said, staring at the footprints, while trying to analyze the whole situation.

"Look at this Scully! Come here!" Mulder shouted loudly, like a kid who had just found their Christmas presents under the tree on Christmas morning.

"What is it? Where are we?" She asked, walking to the window, being careful not to step on the footprints.

She caught her breath for a second when she saw the street through the window. Old cars were going down the street as people walked by on the sidewalks, wearing clothes that were different from anything she had expected to see.

"We must be in some small town." Scully considered, already predicting that Mulder would have some very interesting and totally illogical theory about it.

"Look at that!" He shouted, pointing at one of the cars. "It's like we've travelled through time!"

"Time traveling was created by sci-fi movies."

"Then how did we end up here, Scully?"

"Someone must have drugged us. I wonder why."

"I could name a few people who would like to see us dead, but why bring us here?"

Mulder walked to the door, took a deep breath and pulled the doorknob. A gentle breeze entered the room as they walked out of the house, completely amazed by everything around them.

"If we didn't travel through time, then where the hell are we, Scully?"

A/N: This first chapter is mainly focused on Scully and Mulder, but I'll focus more on the FMA characters during most of the story. So, if you aren't particularly interested in TXF and want to see the FMA characters, come back for the next chapter. Oh, and please, leave a review. Makes me happy and less inclined to kill characters in the story… hahahaha!