Colonel Jack O'Neill wasn't the kind of man who was put off by the unexplained. He considered himself an open minded man, willing to accept things that were out of the realm of possibility. After all that was his day to day life at the SGC. However there are just something's you don't understand. It would be easier to consider that this was something alien, something that could be explained by alien technology or some weird otherworld evolution. The Colonel however wasn't so sure about that now, nor could he understand what the two men that he had just seen behead some guy in front of him where doing here in the first place. How had he ended up tied up in some old run down house on the outskirts of town to begin with and why the hell did his head hurt. He didn't understand but he wanted to. It was getting harder to keep his eyes open and everything was out of focus. Warm sticky blood ran down his neck. He didn't quiet remember how he started bleeding. Suddenly he was being lifted and carried and he couldn't see who was doing that. He wasn't sure if it was friend or foe but he couldn't fight it. He couldn't fight the darkness that was creeping up on him.

Chapter 1

"That dude was in military fatigues." Sam exclaimed as his brother Dean drove the Impala down the highway. "Do you think he saw us? Are we sure he wasn't changed?"

"Man, I don't know but I'm not going to off some military colonel and have the Air Force on our ass. If he's been changed we will know soon enough but he was completely out of it from blood loss and leaving him outside the hospital was the best possible outcome for this. Now we have to get out of town and fast and prey he didn't see us." Dean said shutting down the conversation. How the hell was he to know if the Colonel saw them? It wasn't like Dean wanted to stick around to find out. It was safer to leave and lay low for awhile then to stand around debating what they should do.

It was supposed to have been easy, slip in clear out the vamp nest and move on. The Air Force Colonel made things a lot more complicated in Dean's mind. It shouldn't but it did. Dean was sure the Colonel was conscious for at least part of what happened.

"We should head back to the bunker, lay low for a bit and come up with a plan for if we've been seen. I'll call Cas and have him meet us there." Dean said looking over at Sam. His younger brother looked like he was pouting and Dean wanted to laugh but he didn't. He would have to clean the blood off the back seat that he knew. In the mean time he had placed a blanket over the seat to cover the blood from prying eyes. This was not their day, hell it hadn't been there week, or month, or year in a long time. Dean frowned looking down at the Mark on his forearm, killing those vamps had felt good. Had quenched the thirst to kill at least for the moment and at least he hadn't gone psycho Dean, that was always a plus in his book.

Castiel's car was outside the Bunker when they arrived several hours later. Dean shook Sam to wake him up and the brothers slowly made their way inside.

"Dean" Cas said when they entered the underground bunker.

"Hey Cas, we may or may not have a problem." Dean started.

"The Vampire nest we just took out had a US Air Force Colonel in it." Sam finished.

"Victim or vampire?" Cas asked.

"Victim, he was pretty out of it but I think he may have seen us." Dean went on.

"You need me to scope it out and see what I can find out." Cas stated.

"Yes" Sam sighed.

"I will let you know." Cas said and left.

LILILILILILI

Major Samantha Carter was a little puzzled when she received a phone call from the hospital. She hadn't really realized that Jack had made her his emergency contact. So when the phone call came in she was left a little speechless but she had rushed over. He was asleep when she arrived; the doctors had told her he had suffered a significant amount of blood loss from a strange looking wound on his neck. It was unlike anything they had seen before. This had caught her attention. Had they been off world she would assume it was something alien but here on Earth that was never a good sign. They had their share of alien things happening on earth but to target the colonel that meant this alien thing had tracked him home. It had to be an alien; there was nothing else that could explain it. While he slept she pulled back the bandage on his neck and snapped a picture of it with her phone. She sent that to Doctor Daniel Jackson asking him to try to identify it. She had never seen anything like it before but maybe there was something in all of Daniel's research. She watched him for a moment, his hair was a little longer then he normally liked it. It was a mix of black and grey, mostly grey now. He looked older then she remembered. As if in the last few hours he had aged years. Perhaps it was because he was drained and not feeling well. She wanted to touch his face to kiss him but she kept that to herself he was her commanding officer.

"Mmm Sam" Jack groaned he could smell her perfume and recognized it anywhere. She never wore it off world but when they were planet side she would.

"Colonel" she said sitting on the bed beside him. "Colonel do you know where you are? Do you know what happened to you?" She asked eagerly.

Jack slowly opened his eyes; the first thing he saw was her face. Her short blond hair was cut a little shorter and he thought that she might have gotten a hair cut but he couldn't be sure so he wouldn't say anything. Her eyes lit up when they met his and she smiled that beautiful smile and he couldn't help but smile back. Then he became aware of the pain. His body felt heavy as if weighed down and his mind was a little cloudy. He attributed that to the pain killers. He felt drained and tired as if all the energy had been sucked right out of him. His shoulder, neck, and arm ached on his right side and he was slightly aware that there was a bandage on his neck. "What happened?" he asked looking around and realizing he was in the hospital a real hospital not on base. It smelled sterile and clean the room was pink and grey and the bed was uncomfortable.

"I have no idea, we were hoping you could tell us." She said frowning. "You don't remember anything?" she asked.

Jack tried, he tried hard to rack his brain but try as he might he couldn't remember much of anything. So he shook his head and quickly regretted that when he was met with dizziness.

"According to the doctors you where dropped off here by two men in a black car. They left you at the door and took off all we have to go on is it's a Black Chevy Impala no plate number." Sam told him.

"I have no idea" he said trying to sit up and again feeling dizzy. He realized then that he was hooked up to just about every machine in the room and that blood was being transfused. "What happened to me?" he asked looking over at Sam.

"Some how you lost almost all your blood, the men who dropped you off did so just in the nick of time. There was so much blood loss they weren't sure you were going to make it but you are okay now. There is also a mark on your neck it almost looks like a bite but I have never seen anything like it before." Sam explained. "I am almost thinking that maybe something followed us back through the gate, something we didn't see or detect and it followed you home." She suggested.

"I don't know..." Jack said getting frustrated that he couldn't remember anything.

"It's okay Jack, I'm having you transferred to the base we will figure this out but until we know what it is you should probably stay in quarantine."

"Great" Jack said sarcastically.

LILILILILI

It was several days before Cas returned to the bunker and the brothers where going a little bit crazy.

"Anything?" Dean demanded.

"No, there had been no mention of you anywhere in the media." Cas responded.

"Thank god we can get back to work" Sam said sinking into a chair in relief.

"You are Welcome" Cas said turning to leave.

"Hey Cas is everything alright?" Dean asked. "You know if there is something wrong you can tell us right buddy?"

"I am aware Dean and I am fine. There are just things going on in the world of Angels that I need to deal with." Cas said looking from one brother to the other. Dean was the oldest but shorter then Sam. Dean was also more filled out while Sam was skinny. Dean's dirty blond hair was kept short and Sam had long brown hair. Both wore jeans and boots, Dean wore a plaid shirt over a 80's rocker tee and Sam wore a green t-shirt. Cas sighed they were both looking at him as if he had.. what was the phrase kicked a puppy. "When I am ready to bring you guys in I will call you. In the mean time you need to figure things out with that mark" Cas said pointedly.

Dean sighed; Cas wore his usual white shirt, dark tie, and brown trench coat. "Okay Cas." Dean said looking over at Sam. "Drive safe"

"I will" Cas said before walking up the stairs and out of the bunker.

"Back to work I guess" Dean said looking over at Sam.

"Yeah I guess" Sam sighed.

LILILILILILI

In the days since Jack had been attacked no new attacks had happened. So either whatever it was, was biding his time or had been killed by jack or some else. However Jack still couldn't remember anything. He was healing nicely with no symptoms of any kind of sickness or disease. After the third round of testing he had been declared fit for duty and released for which he was very grateful. If he had to spend another day in the hospital isolation he was going to lose his mind. He slipped into his fatigues and made his way to Daniel's lab.

"Daniel" he announced as he entered.

"Jack" Daniel said in a distracted tone. It took him a moment to register before tearing his eyes away from the computer and spinning around. "They released you" he said somewhat surprised.

"You don't sound so happy to see me" Jack said a little disappointed.

"It's not that I'm just surprised" Daniel said quickly.

"Did you find what bit me?" he asked trying to glance over Daniel's shoulder.

"Well not exactly, at least it can't be" Daniel stuttered over his words.

"Spit it out Daniel." Jack said getting impatient.

"You're not, craving any blood are you" he said playing it off nonchalantly.

"No why would I..." he trailed off as Daniel moved slightly and he saw the word vampire in bold letters."Vampire's Daniel really? I thought they had fangs at the front" he said illustrating his point with his fingers as the fangs.

"Well according to this website I found, it's for survivors of vampire attacks. They have posted images of their bites and it looks just like your bite" Daniel said pulling the picture up. Some of the accounts these people have mention brothers that came in and cleaned out the nest. The brother's names are Sam and Dean Winchester. Dean owns a chevy impala, the only problem is according to the government the brothers died in a helicopter explosion when they were taken into custody by the FBI."

"So you're saying my rescuers where two dead guys in a Chevy Impala and that they rescued me from vampires." Jack said crossing his arms over his chest.

"I knew you were going to be like that, think about it. We go to strange planets and see all sorts of creatures and we know they are real. Once upon a time ago if someone told you the Stargate was real you wouldn't believe them because you had no proof. You're telling me you can't believe in the supernatural right here on our own planet but space travel and time travel are totally real."

"I have proof that time travel and space travel are real, I have no proof that there are vampires or werewolves, or witches or whatever." Jack said pointedly.

"I thought you could at least be open minded about the possibility Jack" Daniel pleaded.

"Get me proof then we will talk." Jack said with an air of finality.