And now for some explanations.
Also, a cameo appearance from another fandom. I'm pushing the timeline a bit here, but I just had to have her working with them.

"There is a man from CIA waiting for you in the front room" Ororo informed Charles the moment they stepped into the school. "He said he knows Moira and that he has information and Hank let him in."

Charles pushed his dark glasses up a bit and glanced at Moira, who frowned, feeling a slight tremor of dread.

'If Hank let him in…'

'It may be someone from the very old times.'

She shrugged.

"Let's see what this is all about."

Jean helped Charles to transfer from the foldable wheelchair they used for the car into the electric one he used around the house and they followed Erik and Moira to the room from which, actually, Scott's voice spilled into the corridor.

"And I got the glasses doctor McCoy made for me, and I can finally see you!"

"That's great, my boy" Moira stiffened at the sound of that voice.

"Levine!"

"MacTaggert" he smiled, slapping Scott's shoulder at the same time. "I see you took care of the boy I dropped off - what, less than half a year ago? I didn't know at the time that you're working here, you see. I would have called you."

She looked from him to Scott, blinking.

"This is the agent that brought me in, Miss Moira. If it wasn't for him, I'd have been stuck at that station who knows how long, and someone would have taken off my bandages…"

"How did you…"

"We are public now, Moira" Charles captured her hand. "It's just you who is, well, hiding. You actually could stop, you know. Now that you're not stuck in the hospital and at risk."

Levine frowned, sitting down again.

"Hospital?"

"Scott, you can go to your classes" Charles said quietly. "You can see agent Levine afterwards, if you wish."

"Sure, Professor. Miss Moira, Mr Lehnsherr."

'Jean, please go with him. Make sure he doesn't bother Alex today, I can feel there's been something going on in the morning, when we were absent.'

'Let me know if you need me.'

Erik let the kids pass through the door and locked them quietly.

"I'm glad you brought Scott to us when you did, agent Levine" Charles maneuvered around the table. "He is a wonderful boy and, yes, had they taken off his bandages at the time, he could have damaged a lot, purely because of the way his mutation works. I'm very grateful you thought about us."

"Well, when they called me and said 'kid says his eyes catch fire' I kind of knew he may fit in here. I didn't have much time - my boss doesn't like me taking unauthorised trips with random orphans - so I just handed him over to one of your teachers. Had I known Moira was here, I would have made time to stay a bit more. At least the kid wouldn't have felt like a package, handed to the recipient like this."

"He was quite happy" Charles smiled. "He was very appreciative of the fact that you recognised his problem and he said he understood you didn't have time to stay and chat. Now, as you're here and I don't see any other young mutant we could help you with, what is it that we can help you with?"

"Well" Levine took off his glasses and wiped them with a tissue. "It is a bit of a story, so I suppose I'd much prefer all of you to sit, if possible. I'd rather not get a crick in my neck staring up at you, Herr Lehnsherr."

Erik pulled out a chair for Moira and sat next to her, putting her between him and Charles.

"So, Levine" she leaned towards him. "What's going on?"

He fiddled with the tissue for a few seconds.

"There is a fraction at the agency that wants to get rid of you" he said finally. "I've accidentally overheard some… discussion, that I can link to the recent events in this area. And in three other places."

Moira straightened, hands suddenly cold.

"What do you mean?"

"A few months ago, just after that Apocalypse attack, you were quoted by some journalists, saying that the attack was blocked by several mutants. Still, none of the people that quoted you were willing to give up your location. The agency became… suspicious. Some higher-ups were anyway quite sure your magical disappearing trick must have been aided by some mutants, and they had already searched for you in various places - the orphanage was actually busted in connection to this - because of Scott, I found out later."

They exchanged glances.

"Because of Scott?"

"He has the same surname as the guy who had accompanied you to the CIA offices, so someone thought that maybe not a school, maybe an orphanage, maybe the 'Mr Summers' was younger than they expected, so they targeted the man managing the place…"

Charles choked.

"You mean, they were looking for Moira there?"

"And busting a paedophile and taking the kids out of that 'home' was just a lucky byproduct. And then the guy lawyered up and they didn't know which kid was which, so before they counted them all and found out that 'Scott Summers' was missing, the Apocalypse guy happened and they had other problems."

Moira rubbed her face slowly.

"So in all this time since I handed in my resignation…"

"They were looking for you, yes. Your flat had been combed by several teams, but as of now all they found was your hairbrush behind the washing machine. I read a few reports describing the total and absolute lack of anyone else's fingerprints, except for yours."

She reached for Charles' hand and squeezed it.

"And what changed? What happened?"

"There were a few younger agents - ones who had never met you, or any of us, or, well, you" he nodded to Charles. "I've overheard them... They were sitting in one of the conference rooms and discussing some case that had a mention of potential mutant involvement. One of them commented that most of the mutants seen seem to be male, and another remarked that… well, that was quite crude, you see."

Erik glanced at Moira's frowning profile.

"What?" she asked finally.

"Well, they said that this may be the reason why they need 'human women', as he said. And then he added that…" Levine paused and looked away. "That he imagines a mutant breeding farm, with 'good clean human women' being forced… Then he added something about maybe you having been taken to such place. Because you had just vanished."

"ERIK" Moira caught the tiny screw that flew in a random direction. "Stop it."

"They…!"

"Yes. And they said it about me. Let him finish."

Levine's brow furrowed at the exchange, but then he shrugged and continued.

"It seems one of these idiots had the bright idea to escalate his suggestion up the chain of command. He used you as an example of a resource mutants may be using... And, apparently, found a sympathetic ear, which in turn started a project that culminated in the 'pulse' being sent."

"The 'pulse'?" Erik leaned towards him, voice gravelly.

"They called it that. They found a mutant child - one with very visible mutations - and calibrated the machinery on his brain. They said later that the signal cancelled out whatever in the brain was responsible for managing the mutation, and so made 'mutants' plain human again."

They sat in silence for a few moments, Levine still staring stonily out of the window and the other three trying to wrap their minds around the enormity of what they heard.

"So… the signal that killed these children…" Charles began slowly.

"Yes. It was created by the CIA. And there were three other trials, in less populated areas. They did some tests on animals first and decided that non-mutants aren't affected, so they escalated to actual inhabited areas, finally hitting your neighbourhood."

"How nice for them" Erik managed to utter.

"Well, this is what they wrote in the justification for trial run" Levine tapped the folder opened in front of them. "That it would not be harmful to the general population."

"What was the point of that whole... travesty?" Erik asked in a soft but very cold voice.

Levine took off his glasses and pinched the bridge of his nose.

"The official version was that they wanted to just cancel out mutation in everyone. They thought - if you can call it thinking - that if they start with a kid's brain, they will get some generic type of waves - don't ask me, it sounds like rubbish to me, too - and that even if it doesn't reach the adults, it will cancel the mutation in kids. Their idea was to run the pulse periodically over different areas and so... wipe the mutation."

Moira managed to catch Erik's fist before it hit the table, without even particularly looking in his direction. He snatched his hand away, but she silently caught it back and held.

"Stop it" she said very calmly. "Preserve it for later."

"They wanted to wipe us out" he whispered roughly. "By eliminating the next generation. By killing our children."

"Erik."

"They didn't mean to kill them" Charles said, his voice shaky. "They just didn't understand how it works. What they hit wasn't the part of the brain that is responsible for the mutation - that makes a mutant what he or she is."

Levine looked at him with dread.

"What do you mean?"

Moira looked at both of the mutants on her sides, Charles barely keeping his shivering under control and Erik becoming more and more like a coiled spring was not a situation she could easily manage. She had to keep both of them calmed down.

"The mutation isn't in the brain" she said slowly. "It's everywhere. Whole body. DNA, it determines which part is actually acting. The control is what is in the brain. That's why it killed and injured so many" she had to stop to regain balance. "If you see the mutation as an engine and the controlling element as the steering wheel - they removed the steering wheel mid-drive for some. And their mutations went crazy. Some, who aren't actively using theirs, just weren't affected, because their brains weren't on the same wavelength. The ones who are actually living with their mutation constantly - like that kid with the gills, or, or..."

"Or Raven" Charles said weakly.

"Or Raven" she nodded, rubbing his shaking wrist with her fingertips "they were hit the worst - their whole control goes into their movement or, sometimes, basic functions. Like, breathing."

"But the children...?" Levine frowned and looked at Erik's white-knuckled fists, now covered by Moira's hand.

"Their brains are not yet formed in the same way grownup brains are. Some kids lose their control when their mutation expresses for the first time - some die, if the mutation is life-threatening in some way - but this signal, it made all of them lose control, which caused, as far as we can say, brain hemorrhages" she said slowly. "And so killed all of them. If it was run on bigger areas, or in places with denser population, I can't even imagine the fallout."

"They targeted us" Charles was hyperventilating. "They hit the school specifically. They knew we have children here. They wanted to affect children here. To cancel their mutation. That could have killed them - if we had one of the more feral kids, or one of the flying ones..."

"Actually" Erik said slowly. "That's the official version. The fact is, if we had any children on the premises, they would have been killed. No matter what mutation. If we had, for example, daycare, we could have ended with a whole group of..."

Moira shivered and pressed a hand to her abdomen.

"So, what they did" she said in as even a tone as she could manage "was to take a kid, read his brainwaves and replicate them - in reverse - then produce a machine that would emit these... and sent a pulse of it at four places in the country. Right?"

Levine nodded woodenly.

"And none of them had ever actually worked with mutants? Or asked someone like you for consultation?"

He nodded again.

"And what happened after they fired their wonder toy?"

Levine gritted his teeth.

"Someone noted the child mortality stats" he said finally. "And pointed it out to their superiors that all they managed was to murder some children who had never... well, that if there is such a thing as a 'good method' of dealing with 'mutant problem', killing pre-schoolers definitely isn't it. And the whole thing was shut down a day later. The men responsible found themselves reassigned to the Canadian border" he smirked "the one with Alaska. Separately. And their case is now under investigation by the FBI."

Moira grimaced.

"What would be needed to follow this through?"

He shrugged.

"No idea. Parents don't really know their children died due to these cretins being given free reign in a large lab. I can't realistically go door to door and ask these same parents to allow me to exhume their children in order to build a case against people from my own agency. I'd need a court order and would probably be shut down the moment I started talking."

"And what if you had parents, who are willing and consenting? If you had a specific case of a person affected by their actions?"

"Moira" Erik managed to cut in before Charles even caught his breath. "You can't."

"Why not?" she asked shakily. "Why not, actually? I'm a trained biologist, I have a bloody PhD in genetics and I am willing and consenting. And I am quite ready to skin these bastards alive if needed."

Levine looked at her with wide eyes.

"Moira? What is going on?"

Charles caught her hand and drew her face to his.

"Love. Please, listen to me. Can you imagine what that would mean?"

She nodded slowly.

"We'd have to exhume her" she said softly. "We'd have to go public. I'd have to testify, and my amnesia would be called a potential reason for dismissal. I'd have to undergo examination and probably have to go off my medication for a period. But, Charles" she caressed his cheek. "I'm willing to do that. If there is no other way to destroy them, I'll spend the rest of my days retelling our story."

"But..."

"I'll be a strong witness. And a material proof, in one. I have the right education and my previous job gave me quite a training in law. I think I can use all my varied skills in this case."

"Moira, what are you talking about?" Levine finally managed to interrupt them.

"We did have a child at the school" she said not looking at him, but keeping eye contact with Charles. "Ours. I can be the parent who knows what happened to their child. I wonder what CIA will say to that."

The young, wide-eyed agent they were assigned was supposedly a highly reputable medical professional. It wasn't that Moira felt that FBI wasn't treating them altogether seriously, but the moment she heard their "contact" being addressed as "darling" she felt a bit like she had just travelled back in time.

The young doctor rolled her eyes at the retreating back of the senior agent and smiled at them slightly nervously.

"Dana Scully. Junior Agent Dana Scully" she introduced herself. "Please, follow me. My office is at the end of that corridor."

Erik pushed Charles' wheelchair, while Moira slowly followed, using one of the handles added to the chair as an unobtrusive support.

The corridor seemed abandoned, but clean, and the office they finally entered was filled to the brim with files in various boxes and folders.

"Please sit. I would need to ask you some questions - probably they will overlap partly with what they asked you for upstairs" she grimaced "but the red tape is even more sacred in this building than anywhere else, so it will be actually faster for me to gather all this information myself than to wait for the previous interview to be copied for me."

Erik pushed the wheelchair closer and then carefully helped Moira sit in the more stable of available chairs, next to Charles. He took the place on her other side, looking at the young doctor intently. She seemed to lose her track as he stared at her in the way that always made strangers uncomfortable. Moira reached out and covered his tightly clasped hands with her cold fingers. A small sound made him relax minutely.

"Agent Scully" she smiled to the younger woman. "I'm not sure we were properly introduced, but maybe you have our names in your files... somewhere" she smiled at the small mound of folders just in front of them. "My name is Moira Xavier" she felt the small surge of pride coming from her husband's direction. "But just a few years ago I was known as agent Moira MacTaggert, so if you care, you can search for my details later. This" she touched Charles' shoulder "is my husband, professor Charles Xavier" another surge of pride "and this is our associate, Erik Lehnsherr."

"Ah" agent Scully let the tiny exclamation escape her. "I know that name."

Erik bristled.

"Yes, you would" Moira said calmly, squeezing slightly Erik's fingers. "Now, I understand you are the medical examiner who will be..."

"Working on your case" Scully provided quickly. "Yes. I will be gathering all the information regarding the medical side of..."

"Yes" Charles leaned a bit forward, catching Moira's free hand. "I wanted to offer - one of our teachers is a medical doctor, and should you wish, he could assist you - not interfering with the autopsy, but just... being there, in case there is something specific that would be impossible to explain in standard circumstances."

"Meaning the potential differences in mutant physiology?" Scully frowned. "If he could, I'd be grateful, but I'll be performing the actual autopsy and analysing the samples. I can't allow external influence in this."

Moira nodded.

"Of course. We wouldn't want to jeopardise the whole case. However as we don't know what may potentially be found... Hank may be invaluable. He had been working with various types of mutations for the last fifteen years."

Agent Scully's eyelashes fluttered and Moira could only think of her as adorable, which earned her a mental chuckle from Charles.

"Hank is waiting for us in the lobby - we didn't want to bring him in, in order to avoid putting additional pressure on you" she explained. "Now, about these questions?"

Scully called them in three days to report her findings - and to share some frustration with her superiors with Moira.

"They are saying it's completely useless" she said, grinding her teeth. "Because apparently we don't have enough evidence that the child is actually yours. Because the gene panels don't match. As if they actually had machinery to do this."

"Well, Hank does" Moira sighed. "And yes, they don't match, because since then I've been undergoing a treatment due to the blood contamination. I have no idea how they could get the results, but we can't produce any that would say anything different."

"I think at least part of what they are saying is because they really don't like me talking about 'physiologically correct pregnancy'" Scully added morosely. "And they wince every time I mention anything regarding miscarriage. Oh, God, I'm sorry..."

"No, no" Moira sighed. "Remember, I'm a biologist. I can take it."

"Well, then. One of the Very Important And Educated men tried to make a case that your miscarriage had nothing to do with the 'pulse' being run. Another thought that it may have had, but because you were in close proximity to multiple mutants who may have caused it due to their abilities..."

"Really?" Moira slumped in her chair. "Because I was the only woman pregnant with a mutant in the area affected, they will not admit there is a link?"

"More or less, yes. You are statistically insignificant. Yes, you could sue the CIA, because, now that you actually officially know, you can try a civil suit against a government agency. But otherwise, my findings are going to be buried in some little room in FBI basement. On the other hand, I have slightly better news about the CIA agents directly responsible for the whole thing. They have been found guilty of criminal negligence in preparing a publicly-applied experimental machinery. There are multiple confirmed non-mutants reporting with various types of illnesses, very strictly geographically limited to the areas the test was performed on."

"So... because now they found out it's affecting general population too, and not only mutants..."

"It is easier to push for proper verdict, yes. I know it's not what you wanted, but it is all we're going to get."

Erik's going to be furious. Dammit.

"Thank you, Agent Scully" she said after a pause. "I just hope taking part in this case didn't jeopardise your future at the Bureau..."

"Well" Scully sounded like she was smirking. "Let's say that I'll make sure to stay here long enough for this boy's club upstairs to be properly shaken up. One day, when I'm a senior agent and have appropriate support, they won't even know what hit them."

What now? How are they going to pick up their lives?

How will this affect Scully's future work in FBI? (I'm thinking of writing a 1-scene equivalent of 1st episode for her)