Characters: John, Dean, Sam Winchester, Caleb, Bobby, Others.

Rating: Pg-13, some language.

Pairings: John/Mary. No slash in this tale folks.

Summary: Okay I'm not very up on 'dark angel' but I wanted to do a crossover with supernatural, so if I make any mistakes with the series I'm sorry and you can correct me if you want. For the sake of the story please disregard the timeline for dark angel as I want this to run alongside the supernatural verse. It's another AU (man do you write anything else girl) although I may refer to some episodes of supernatural later on, I'm going to see how it all pans out.

Disclaimer: If I owned rights to either show I would be living the life of riley somewhere, but alas I don't, so I'm stuck in sunny England where the only thing getting a tan is the bath when no-one washes it after use.

The young couple entered the military facility and looked around nervously a man in a lab coat moved forward to greet them.

"Hello and welcome to manticore, I'm Doctor Black it's nice to meet you both'' he said as he shook both their hands

" I'm guessing you're both probably nervous so why don't we head to my office and you can ask any questions that you have, then we can get started with the procedure''

"So soon?'' The young woman asked anxiously, the young man next to her wrapped a strong arm around her slender shoulders offering comfort and support; she leant into the touch, smiling softly at him.

" Well its best we start as soon as possible, the sooner we start the more chances you have of conceiving'' Doctor Black replied distractedly, as he led them to his office still leafing through his file,

"Oh…..oh I see'', she fumbled with her hands and leant further into her husband's side.

" Corporal before you join us you'll be required to make your sperm donation and give some blood samples, but don't worry we'll take good care of your wife'', he moved to separate the couple,

"No'' the young officer said, his dark eyes fixed in a determined gaze on the doctor,

"Excuse me? Did you just disregard a direct order?''

"Is it an order sir?'', he asked raising an eyebrow, "I thought it was more of an request, besides Mary doesn't go anywhere without me'', he moved closer to his wife's side as if to emphasise his point,

"John, I'll be okay. Don't worry, I'm sure they'll look after me just fine'' she lay a comforting hand on his cheek and gave him a soft smile. John sighed heavily and raised his eyes to the doctor once more who was giving him a questioning look.

Corporal John Winchester was an imposing sight he was tall, 6ft 2 to be precise, it was his height and dark looks that had attracted Mary in the first place, well that and he had the perfect muscular body, he was quite the perfect specimen of manhood in her humble opinion.

"At ease solider'' the Doctor tried plactatingly, "all we need are your donations so to speak. And yes it is an order'', he added, Johns shoulders slumped in defeat,

" Yes sir, I'll be right back they'll take good care of you won't you?'', he shot at the doctor, the man gulped down the lump that had formed in his throat, his adams apple bobbing nervously at the intensity in the young man's eyes,

"Of course we will'' he said and offered Mary his arm "This way Mrs Winchester, why don't we go get a coffee?'', she pushed a strand of blonde hair behind her ear,

"That sounds great, I'll see you soon Hawkeye'', she said her lips curving into a seductive grin,

" You bet your sweet ass Hot lips'', he swatted her butt then strolled down the corridor towards the room the nurse was standing outside of, Mary watched him go her green eyes fixed on his back until he was out of sight. Taking a deep breath she followed the doctor into his office, and hopefully their future.

"Okay Corporal, just head in there and get changed and then if you'd be so kind as to fill this for me'', she handed John an empty sample pot, he blushed as he took it but nodded that he understood her request

"Yes Ma'am".

In a small room on the opposite side of a two way mirror stood two men one was wearing a lab coat with blue scrubs underneath, the other man a brown leather jacket and civilian clothing,

"He has a bit of an attitude'' the doctor said, a hint of disgust in his voice, "You sure this Winchester kid will give us a good sample Colonel?''

"I'm sure'', the Colonel replied "He's outstanding in every field, did a stint in special ops I'd say he's damn near perfect''. Colonel Lydecker studied the young man who was now sat glancing around the room, watching for any hidden threats his dark eyes lingered on the mirror for a moment and the Colonel was sure he knew he was being watched. He smiled widely thinking of the possible soldiers this young man could reproduce.

"What of the wife did we find anything on her?'', the Colonel gave the doctor a look that made the man squirm and he smirked at the man's discomfort, but then frowned his voice full of irritation as he spoke

"Couldn't find much on her, but her blood works out fine. The basics came through though, grew up in Minnesota with two parents, nothing out of the ordinary''

"But you have your doubts?'' the man queried,

" I don't know, there's just something about her'', he shook his head, too many years in the service had made him suspicious of people and seeing trouble were there was none. She was just an ordinary woman from Minnesota what trouble could she cause?

" This way Corporal , I'll take you to your wife now'', the nurse said , he followed the nurse down a corridor and was met by the Colonel before being let into see his wife.

"Corporal Winchester?'' he asked, Winchester eyed the man before him

"Yeah, who wants to know?''

" I'm Colonel Lydecker, I was the one who approved you and your wife for treatment, so a bit of respect wouldn't go amiss son'', the young man stood to attention and sent the Colonel a salute

"Sorry sir, my wife and I are very grateful for this opportunity. We've been trying for a couple of years for a baby but had no luck'',

"At ease kid. I was very impressed with your file; your commanding officer has nothing but praise for you. Says you got a smart mouth but you're the best he's seen in a long time'',

"Thank you sir'', Winchester replied, a grin tugging at his lips,

" Not a problem kid, oh and good luck'', Winchester smiled at the Colonel and Lydecker knew he'd made the right choice, Winchester was a damn good soldier and both were good looking, yeah he was sure that John Winchester would give him the best X5 ever.

"John'', Mary smiled at her husband as he entered the room "Is everything alright?''

"Yeah babe, it's all good'', he grinned his dimples flashing "I made my donation at the bank'', he waggled his eyebrows making Mary giggle. The doctor cleared his throat, clearly not amused with the lewd joke,

"Okay, have either of you any questions?'', the doctor said resting his hands under his chin, John cleared his throat and nodded his head,

"Yeah actually we do. We're not exactly clear how this whole insemination thing works'',

"Well it's quite simple, we'll simply take one of your wife's ovaries and introduce you're sperm via a test tube, so the initial conception will take place there. After a 4 week gestation period, we'll introduce the fertilized embryos to your wife's uterus''

"How soon before we can start?'', Mary asked the excitement bubbling in her voice, the doctor smiled at her enthusiasm,

"Well we can start this afternoon; you'll only require a general anaesthetic so we can begin as soon as you feel comfortable. Is that too soon for you?''

"No, no this afternoon will be fine won't it John?''.

John nodded his agreement and looked to his wife who was practically bouncing in her seat; he smiled, just like a new born puppy he thought,

"How many chances do we get at this doc?'' he asked turning serious suddenly,

"Chances?'' the doctor asked puzzled "Chances at what?''

" At us having a baby'', Mary visibly paled she hadn't thought about only having a certain number of chances in conceiving, the thought quickly flashed through her mind that her and John would never have children.

"Well, we'll cross that proverbial bridge if we come to it. We're also going to start you on a course of medications it's just vitamins and things but it will help with the process'', Doctor Black smiled at Mary trying to put her at ease, she relaxed back into her chair and let out the breath she hadn't realised she'd been holding.

"Okay well let's start with the prep work, we'll take you to the infirmary and get you sorted then we can get this show on the road '', the doctor clapped his hands together excitedly. For a strange reason it sent a cold shiver down Mary's spine, but thinking it was probably nerves she dismissed it.

4 weeks later.

Mary was so nervous, today she was going to be inseminated with two embryos and she was both scared and excited. Scared that it wouldn't work, that she wouldn't be a good mother, that she'd let John down. After the tests they'd undergone at 'manticore', they'd said that Mary was unable to have children of her own, but with the new technology they had they could promise the young couple a child that would be theirs. At first they'd been devastated by the news that Mary couldn't conceive naturally, but then they'd been thrown a life line. Because John was in the marines a new programme had been offered to a select few offering healthy young couples free artificial insemination, they'd met medics and had countless tests, John had had to have extensive training and intelligence tests, he'd passed all of them with flying colours and from what John had said the Colonel was most impressed with him.

It was with a churning stomach that Mary was led down to the small theatre room,

"Relax now, everything's going to be fine'' Doctor Black assured her, she was laid on a gurney now with her legs in stirrups,

"Okay now deep breath, this may feel a little uncomfortable'', he said as he threaded the small catheter into her cervix. Mary squeezed her eyes shut tight and bit her lip, the doctor had been right it was uncomfortable and she didn't have John there with her to support her. But it was worth it, of that she was sure.

"Alright now I'm going to insert the embryo's'', Doctor Black did just that then extracted the catheter. Mary was wheeled back to an anxiously waiting John,

"How'd it go doc?'', he asked nervously twisting his cap between sweaty palms,

"Fine Corporal, just fine. We'll let your wife rest a while then you're both free to go home. Make sure you stick to those meds now and we'll see you in a couple of weeks for a check up'', he smiled at the young couple who were lost in each other happiness, it was radiating off them.

"Make sure you stick to those meds Mrs Winchester. They'll help a lot with the morning sickness and such'',

"Oh don't worry doc, I'll make sure she takes them'' John said happily as he gripped his wife's hands, he watched the couple leave his office and pressed a button to his intercom,

"It's done'' he said succulently, now all they had to do was waiting.

The next couple of weeks passed by quickly, John was treating Mary as if she was made of glass, scared to death that she would break. They arrived early for their appointment and where seen by Doctor Black who was very pleased with Mary's progress and told them he would be seeing them once a month from now on, unless there were any complications which he couldn't see happening. They'd still have to take blood once a month to make sure that Mary was healthy and the next time they came to the clinic Mary would have her first scan.

As the next few weeks passed Mary began to feel stronger and healthier than she ever had, they were both excited to see the babies growing in Mary's belly.

They arrived for their appointment that would be Mary's first scan, they where both excited and nervous, Mary was led away first for her bloods to be taken then led into the small examination room where the scan would take place.

"Okay Mary just lay back for me, this may feel a little cold'', Doctor Black squeezed the gel onto Mary's still flat stomach, and ran the ultra sound machine over it. At first the image was a little fuzzy but then the two small images appeared on the screen. Mary looked to John tears forming in her eyes,

"Oh John, look!! Look at our babies'' she cried. John's eyes also shone with tears he nodded unable to speak and clasped her hand tightly in his.

"Would you like to hear the heart beats?''

"Yes!'', they both said excitedly. The doctor pressed a small button were upon a fast paced whooshing noise could be heard.

"That's…………..that's the heart beat?'' John asked a look of awe on his face,

"Yes it is'', the doctor smiled

"It sounds so fast, is it meant to sound like that?'' he asked worried.

"Yes'' the doctor laughed "It always sounds like that whilst in utero''

"Oh….well…..I just wanted to make sure'', John felt embarrassed and the look the doctor was giving him wasn't helping.

"Everything's coming along fine, how you have been feeling?''

"Great'' Mary exclaimed "No sickness or anything, but I have been being pampered'',

"That's good to hear, are you continuing with the medication?'', Mary rolled her eyes and looked to John,

"Not like I have a choice not to with general doom here. He won't 'let' me forget. But yes I've been taking it as instructed''.

"That's great well, everything's going well we're very happy with your progress and we'll see you again next month''.

After the exam John was escorting Mary down the corridor when they were approached by the colonel, John stood to attention and sent the colonel a salute. Lydecker smiled,

"At ease corporal. How are things going?''

"Fine thank you sir. This is my wife Mary, Mary this is colonel Lydecker that I was telling you about'', Mary extended her hand and shook the man's hand she had just been introduced to

"Thank you for choosing us colonel, you don't know what this means to us'' she said with much gratitude,

"It was my pleasure ma'am, you both have a good day now'', he watched as the couple walked down the corridor away from him and then entered the office of Doctor Black.

"Well Black will she reach full term?'' the doctor nodded,

"All results are pointing in that direction. Both embryos are healthy''.

Lydecker grinned

"Knew I'd made the right decision choosing Winchester. I actually feel kinda bad that they won't get to keep both kids but manticore needs one of the twins''

"What will you tell them?''

"We have a story planned out. Nothing fantastic but they'll just be told that one didn't survive''

"How will you know which one to choose?'', Lydecker eyed the man before him, he was asking a lot of questions but if he became a danger he could be easily replaced,

"The stronger twin will have a barcode on the back of its neck, the weaker twin won't''

"It's that simple'' the doctor asked surprised

"It's that simple. Can you determine gender yet?''

"This couple have been given XY chromosome's'',

"Give it in English doc'' Lydecker said irritated,

"Male, the children will be males'', Lydecker nodded his approval

"Good, well keep me informed of any developments''

"Of course''.

Lydecker left the office, he was pleased with how things were progressing he had a good feeling about the Winchesters.

The Winchesters however did not have a good feeling about him. One Winchester in particular, Mary was forever grateful to the 'manticore institute' for their help in aiding her to conceive, but she had a strange feeling about the colonel. It was telling her not to trust him and she always followed her instincts, so she had been begging John to let her give birth away from the man and the others at manticore.

John had finally agreed when the time for Mary to give birth drew closer, worried that the stress would bring on a premature birth, so they'd left Seattle and headed to Kansas, leaving after John had resigned his commission and with no word or paper trail to lead anyone to their new home, they felt safe.

Mary had given birth 6 weeks later on a cold January day to two healthy twin boys both born with a strange barcode style birth mark on the back of their necks. The small family had blossomed well, John and Mary couldn't be happier with Ben and Dean their two little miracles as Mary often called them. Another miracle came to them almost 4 years later in the form of another baby boy that they named Samuel, but he was always 'Sammy' to Dean, the Winchesters where ecstatic, Dean took to the role of big brother like a duck to water. Ben however became sullen and the couple found they couldn't leave him alone with the baby or he would be crying with angry marks left on his baby skin.

It was on Sammy's 6 month birthday that the Winchesters lives where ripped apart forever. A fire started in Sammy's nursery killing Mary instantly, but the worse was still to come as Dean went missing the night of the fire, stolen from John and returned to manticore to begin his training. No-one heard the terrified screams of the 4 year old as he was dragged away from his family. There was too much noise and commotion.

No-one believed John when he told them he had seen his wife pinned to the ceiling her stomach ripped open, and then flames consume her body. They all thought he was too consumed by grief or guilt over losing his wife and son. John visited a psychic who told him of the things that were out there in the dark, and that he had to have hope, his boy was alive and well, but she just couldn't see where he was. So John left Kansas far behind him with the remains of his family in search of his wife's killer and to find his son.

And find him he would, but it wouldn't be for another 12 years.