A/N

I had an idea for a Harry Potter/Stargate SG-1 crossover. Please read and review, point out any loose ends in merging the two universes.

About canon, I settled it in 1998 following DH, but this story isn't exactly following HP canon, since it's a crossover. For Stargate canon I prefer to think I'm in a parallel dimension placing it somewhere between Daniel's return after being ascended and the defeat of Anubis. As far as I understand it Stargate takes place in a undefined "present day" (Hammond being young 1969 and the Stargate found in the 1920's does put the series in the 1990's or first decade in the 2000). Assuming the 'present day' is the year of production 1998 is the end of season 1, but I take the liberty to change that a little – an infinite number of parallel universes is a blessing :o)

Everything Stargate is owned by MGM and Harry Potter belongs to JKR


Chapter 1

A US Air Force Colonel sat in a chilly hotel room in London, not looking too happy with his situation. Truthfully the staff at the hotel didn't know he was a military officer, since he was wearing civilian clothes. In the room were two more people, a big fellow with a strange gold tattoo in his forehead, and a blond woman.

"For crying out loud. What are we doing in this... wet... land?" Jack asked looking at his two friends. "And what is that stuff you're eating there T?"

"It is British, they call it marmite, Colonel O'Neill." The big fellow replied smiling, eating more of it with a spoon right out of the jar. "Reminds me of my mother's kel'mor from my childhood."

"Let me try that" Jack said taking a good spoonful.

He immediately spat it out.

"Are you sure it's for eating? I got better stuff in prison and I've been to a number of those on various planets." Jack frowned looking highly suspicious.

Sam looked up from her technical analysis and laughed seeing Jack's face as Teal'c took yet another mouthful of marmite.

"You try it if you think it's so fun Sam" Jack told her "But really, I'd recommend it to grease your motorcycle instead of eating."

"I think I'll pass, sir." she replied.

Jack turned on the TV zapping through the channels until he drew a relaxing breath.

"All right campers, this trip might not be a total loss after all, they have the Simpsons."

"Right sir. Relax. Let Daniel do what we came for." Sam encouraged him.

"Yes, let him do just that. But next time let it be somewhere nice and warm instead of a rainy, foggy place with some kind of motor grease sold as food." Jack said focusing on the TV-show.

Sam sighed and returned to her analysis.


Daniel Jackson entered the library. It was almost empty. He quickly found the section he was looking for, noticing only a teenage girl reading one of the books she had piled up next to her. It was a bit strange. Teenage girls shouldn't normally be interested in books from this section. He scanned the shelves and noticed the book he was looking for was missing. Double checking with the library database he drew the conclusion the book wasn't in the hands of a professor, leaving only one option. The teenage girl was for some reason studying a several centuries old book on Arthurian myth. Daniel decided to approach her. As he did he noticed she in fact did study the book he was looking for. She looked up from the book and looked at Daniel. She was maybe about eighteen years old. Definitely too young to be studying this kind of literature, normally. She had bushy hair and brown eyes.

"Can I help you?" she asked.

"Um, not really.... The thing is I was here for the same book you're studying. Look. I'm sorry if I startled you. I was just amazed by someone your age studying this kind of literature." Daniel said. "I'm Doctor Daniel Jackson by the way."

She shook his hand.

"Hermione Granger."

There was something that amazed Daniel about this girl. She seemed matured beyond her years and also seasoned in a way he only had felt with those who lived through a war. As they shook hands Daniel had a flash of an existence he had been having as an ascended being. She seemed to have noticed it too. She pulled away her hand and the next moment she held a small stick in her hand pointed at him.

"All right, Doctor Jackson. Who are you? What did just happen?" she asked.

"You tell me." he said.

Hermione was certain the image came from Daniel's mind and he was aware of it as well. No harm in revealing some information to him. It was nothing a memory charm wouldn't take care of if necessary.

"I saw the image of your Patronus, but it was strange because it looked like you."

"Patronus?" Daniel asked.

"The white glowy thing." Hermione clarified.

Daniel was stunned. This girl had seen that image in his mind. As far as he knew that was impossible unless she somehow was connected to the Ancients. He needed to gain some trust. That stick was held like a potential weapon. He had seen enough strange things to be careful.

"It's a long story, and I'm not sure how much I'm allowed to tell. Are you going to poke my eye with that thing?" Daniel asked nodding towards the wand.

Hermione realised she might have overreacted, but she had never had visions from shaking someone's hand, and her year in hiding still made her jumpy. It was after all only weeks after the Battle of Hogwarts. Of course he wondered what her wand was.

"Tell me who you are and about that glowy thing and I might consider not to." she said confidently.

Daniel felt uncertain how to act. He had left for the library without back up from his team, so he was on his own. Still, he didn't know if this girl was a threat to him. She seemed friendly, but startled by the flash from his mind. There was something unusual about her, the book she read, the stick in her hand, and her maturity. He decided to tell her the truth and face Jack O'Neill's tirade about secrecy later.

"I'm Doctor Daniel Jackson. My area of expertise lies in linguistics and ancient cultures. I do classified work for a government. I have a ID card in my pocket." he said slowly opening his jacket.

Hermione looked at him for a moment.

"Accio ID card" she said and waved her wand.

He saw his ID card fly to her hand. Still having the wand pointed at him she looked at the card.

"All right Dr Jackson. You seem to be who you say you are assuming this US Air Force ID isn't a fake. What about the glowy thing?"

Now that was harder to explain without breaking secrecy, but technically she already seem to know about it, but she called it a Patronus. And that getting-his-card-fly-to-her-hand-trick was reason enough to learn more about this girl. Being without his team he had to tell her.

"This may be hard to understand. It was a vision of a non-corporeal life." he said awaiting her reaction.

She simply nodded.

"What kind of beings are you referring to?"

"I refer to them as Ancients. Maybe related to your Patronus?" Daniel said slipping in a question.

She shook her head.

"Patronuses aren't alive they are simply a form of positive energy and emotions." she said waving her stick again "Expecto Patronum"

Daniel was amazed as a silvery otter emerged from the wand and floated around the room before disappearing into a silvery mist. He also noticed that she used words slightly related to Latin. Because the Ancients language was related to Latin too, he was more and more certain that this girl's powers were connected to the Ancients somehow.

"That's a Patronus?" Daniel asked.

Hermione nodded.

"I see you can do some powerful things with that... stick... could we somehow build some trust here?" he continued.

Hermione lowered her wand and they sat down by a table, with their hands on top. Hermione still held her wand but didn't point it at Daniel.

"It's a wand, not a stick." Hermione replied "You are not the average doctor in linguistics and ancient cultures, Dr Jackson, knowing about non-corporeal life."

"I guess not. And you are not the average student wielding powers with that... wand. What are you?"

"I'm a witch. What are you?"

Daniel gave no hint of surprise, nor dibelief.

"I'm a normal man, but having lived a quite extraordinary life, gaining some unique knowledge."

Hermione thought about his words for a moment.

"You have been non-corporeal?" she asked in a way that sounded like a conclusion.

Daniel nodded. Hermione's claim to be a witch actually made sense to him. Merlin, being an Ancient had also been known as a wizard. What if there had been more of them staying on Earth instead of ascending? What if they had children with humans? Well, in fact there was the Ancient gene Jack O'Neill had, but what if there were people with a bigger Ancient heritage?

"Your powers are amazing." Daniel said. "Do you know where they come from?"

Hermione looked at him. She really didn't know. Exactly when or where the first wizards and witches appeared wasn't known. Exactly where the magical powers came from was unknown, an abstract subject studied in the Department of Mysteries.

"I don't know exactly." Hermione admitted

"I have a friend. She's called Samantha Carter. She knows more about powers and energies than anyone I know. I think we could help each other. I know that one mentioned in that book, Merlin, was an Ancient. I think our knowledge combined could give us both a lot of answers."

Gaining new knowledge was always appealing to Hermione. If Daniel was brining in a friend she needed one too. Harry should be at 12 Grimmauld Place and it was a better place to meet at than a library, or the appealing chaos at the Burrow.

"All right. But we'll go to a place of my choice where a friend of mine is."

Daniel thought about it for a moment. He agreed. Hermione sent off a Patronus to Harry who confirmed he was at Grimmauld Place and she was welcome with two guests. Daniel looked amazed by the communication. Daniel called Sam who told she would be there in five minutes.


Five minutes later a blond woman approached them.

"Daniel?" she asked seeing the young woman.

"Sam, meet Hermione. Trust me on this one okay? Is Jack all right?"

"Watching Simpsons, glad he didn't have to go out in this weather." She said and turned to Hermione "Nice to meet you Hermione."

They shook hands.

"Sam. Hermione is going to take us to another place, I need your skills in theoretical physics on this. You'll like it" He turned to Hermione "Lead the way."

"All right. Take my hand" Hermione told them offering them a hand each.

"Daniel?" Sam asked.

"Trust me." he said taking Hermione's hand, uncertain what was going to happen.

Sam looked doubtful but took her other hand and then Hermione spun and they felt like being pulled through a rubber hose. Next they were just outside the door to a house. The library was gone.

"Where are we?" Sam asked looking at Hermione "How did you do that?"

"I apparated us to my friend Harry's home."

"Apparate?" Sam repeated still looking around.

"Told you Sam. You'll like this." Daniel said also amazed by the transportation.

Sam was stunned.

"It was somewhat like gatetravel, but not a wormhole. Hermione must somehow have folded space-time around us pulling us into subspace and unfolded space-time here. But that is impossible, well, not in theory, but the energy needed would require a ZPM. How far can you do this... apparation?"

Hermione shrugged as they entered the house and walked upstairs

"I have never apparated outside England. There are laws regulating international apparation."

Sam looked at Hermione.

"Exactly who or what are you?" she asked.

"I'm a witch." Hermione replied. "Same as your Ancient friend Merlin according to Daniel, though I don't consider myself as powerful as him."

Daniel turned to Sam.

"Sam. I believe Hermione might be a descendant of Merlin or some of the other Ancients, but with a bigger Ancient heritage than the gene in Jack."

Sam looked at him big astonishment in her eyes.

"My only theory so far about this apparation is that Hermione somehow is able to draw zero-point energy and use it for this way of transport.

They entered a living room and noticed a total lack of electronics. A black haired young man about Hermione's age welcomed them.

"Hermione, nice seeing you. Who are your friends?" He asked and turned to them "I'm Harry Potter."

"Nice to meet you Mr Potter. I'm Doctor Daniel Jackson, and this is my friend Samantha Carter."

Daniel noticed the same maturity in Harry as Hermione showed. He was very intrigued by the two teenagers. Sam was looking like a child in a candy store after the apparation. They all greeted and soon decided to use a first name basis.


"Sir!" Sgt Harriman said.

"What?" General Hammond asked.

"Doctor Jackson's and Major Carter's tracking signals were just lost."

General Hammond looked at the Sergeant for a while.

"Get Colonel O'Neill on the horn, patch him through to my office." He said.

His phone rang and he picked it up.

"Colonel, what's your status?"

"General. I'm very relaxed thank you, surprisingly dry. Teal'c is... fine. I didn't miss checking in, did I?" Jack answered.

"No. What about Dr Jackson and Major Carter?"

"They're at some library, checking some leads on the Ancients."

"Their signals were just lost."

"What? In a library?" O'Neill asked. "Ancient technology can meddle with ours and the Asgards', but there's not supposed to be any alien stuff in that library. We'll check it out though and report back to you, sir. O'Neill out."

Jack O'Neill looked out the window and sighed.

"All right. Somehow Sam's and Daniel's signals were lost. We better check it out."

They left for the library returning fifteen minutes later, calling General Hammond.

"General, there's not a trace of them at the library. They're gone."


Hermione and Daniel updated their friends on what they had talked about and Hermione demonstrated Accio and her Patronus. Sam was beyond herself already.

"I don't even have the beginning of a working theory for that Patronus, but the Accio seems to make things defy gravity."

"There are better charms for that" Harry said levitating the sofa she was sitting in.

"You control the forces of nature and space-time. Can you affect matter?" Sam asked.

You mean like this?" Hermione asked flicking her wand at a candle transfiguring it to a flower.

"That is... amazing, to say the least. You must have reconfigured the candle at a sub-atomic level." Sam gasped." Looking at Hermione "You have the powers of an ascended Ancient but are apparently very much corporeal."

"Daniel thought you might have theories about the magical powers." Hermione said.

"Well, we have come across something we call zero-point-energy. It's power drawn from subspace, a layer outside normal space-time. Zero-point-energy is compared with normal power generation like lighting a match compared to blowing a 200 Megaton nuke."

Luckily both Harry and Hermione knew that a nuke was a big Muggle bomb from growing up in Muggle homes."

"Are you saying that magical powers are the ability to summon this zero-point-energy and manifest it in spells?" Hermione asked.

Sam thought about it for a moment.

"I think that's the case." Sam said.

"And you are using incantations related to Latin" Daniel added. "The language of the Ancients is related to Latin too. I think that's a clear indication that the Ancients were the first wizards and witches. We are here looking for information about Merlin, because it may hold the key to defeating our enemy."

"Daniel, are you sure we should tell them this?" Sam asked.

"Yes Sam. I am." Daniel said and turned back to Harry and Hermione "He's an evil being, living trapped between ascended and corporeal form. No one knows how it happened, or why he wasn't killed."

Harry looked at Hermione in terror.

"Another one fooling around with Horcruxes?" He asked.

"Perhaps."

"He's using advanced technology to stay sort of half corporeal."

Harry looked at Sam and Daniel.

"About a month ago I defeated an evil wizard. We couldn't defeat him until his ties to our world were destroyed. Before that he couldn't be killed. He had created something we call Horcruxes, containers of a part of your soul."

"That sounds like something Anubis would do." Daniel said. "If he knows of your magic and the Ancients technology, it's no wonder he's winning the war."

"What war?" Harry asked.

"The galactic kind" Sam said.

After a long explanation Harry and Hermione learned about the races Daniel, Sam and their team had encountered, and the war against Anubis.

"Sam, maybe we need to check in with Jack. Time's flying."

Sam agreed and tried to make a call.

"I'm sorry, but Muggle technology doesn't work here. It's has to do with interference from the wards we have around our homes." Harry said.

Sam stepped outside and called Jack O'Neill.

"Sam?! Where the hell are you? General Hammond is about to pick up that annoyingly red phone of his and declare a suspected alien invasion because of you leaving without a trace."

"Sorry sir, we realise we were out of touch for a while, but alien invasion?"

"What else could have jammed that Asgard tracking signal. Nothing on earth is supposed to do that, and very little else for that matter."

"We'll explain. Let's just say we've made an amazing discovery."

"Unless it's sunshine I don't want to know... until you debrief... Well, if you'll excuse me I'll ask Hammond to call of the potential planetwide foothold situation."

"You call that off sir." Sam said hanging up.

She returned to Harry, Hermione and Daniel.

"Do you think you could assist us in fighting Anubis?" Sam asked.

"Your command is a secret part of US Military. I think we need to go through the Ministry of Magic and the Auror Office." Harry said "But the way you describe it this Anubis might be vulnerable to magic. And if he has a Horcrux we need to destroy it."

"I think we must report back to Colonel O'Neill and you seem to have your reports to make. How do we reach each other?" Sam asked.

"We'll drop you off by the library and meet there later."

"Fine. We'll drop by every third hour." Sam decided.

After apparating Sam and Daniel back to the library Harry and Hermione left for the Ministry.


"Yadda, yadda, enough techno babble Sam. I get it those kids broke every law of physics you ever learned. That's enough for me to understand they are really amazing." Jack demanded "Put simply. Can and will they help us whoop Anubis' semi-ascended ass?"

Sam was cut off mid-sentence describing the transfiguration and her theory of the sub-atomic reconfiguration of matter.

"I think they can, and hope they will." she said

"So, helpful Ancients with amazing powers. There's something new." Jack said.

"Actually they seemed to be quite normal teenagers." Daniel said.

"Zapping you through subspace on will? Yeah, that sounds like an average teenager to me." Jack said ironically.

"There's that" Daniel sighed. "Teal'c, have you ever heard of magicians or something similar?"

"No, Daniel Jackson, I have not. The Goa'uld would not like non-technological power, impossible for them to use."

"Maybe they got here after the rebellion against Ra and never faced each other." Daniel speculated.

"If they agree to help us we must ask the Tok'ra and the Asgard to compare their powers against them." Sam said.

"What?" Jack snapped after mentioning the Tok'ra.

"Sir. They told us about a war against a dark wizard here on earth, but if they face hostile jaffa, energy weapons and goa'uld technology we must know if their powers have any effect."


Harry and Hermione arrived at the Ministry and hurried through the Atrium trying to avoid the attention they got after defeating Voldemort.

"What do you make of all of this?" Harry asked Hermione.

"We just might be able to learn more about the deepest mysteries surrounding magic. There's a lot Sam and Daniel told us that made sense. I don't know much about physics because I quit the Muggle school before learning it properly, but sure the power has to be drawn from somewhere and Daniel telling us about the similarities in our incantations and the language of those Ancients can't be ignored."

Soon they were in Kingsley's office and the head of the Aurors Gawain Robards was there too. Harry and Hermione told about what they had learnt so far.

"This is amazing and we must learn more." Kingsley agreed. "We also need to examine if this Anubis character made a Horcrux. Harry and Hermione. I really can't ask more of you, but there are no one more experienced with Horcruxes than you two and Ron. Gawain, you would be the Ministry's official in this matter."

Gawain bowed to Kingsley.

"We'll do it. How do you want us to proceed?" Harry said after getting a nod from Hermione. "I'm sure Ron will join us too."

"Invite the Muggle team here." Kingsley said giving them a tennis ball "This is a port key, leading to the minister's conference room. Take them directly there. Send me a Patronus when they are in place."

Harry and Hermione left to get Ron and filled him in as they waited to meet the Muggles at the library. Ron was as amazed as they were.

"Anubis. I heard of him when I was in Egypt. A nasty fellow. A bit like Riddle actually. I think he was the darkest wizard of his time." Ron said

When the time was right they apparated to the library. Daniel was there. He took them to the rest of the team.

"Our commander, Colonel Jack O'Neill, and Teal'c" Daniel introduced the two none of them had met before. "And Ron, this is Major Samantha Carther. Ron is a friend of Harry and Hermione."

"We have met with our minister and he is willing to let us three and an Auror work with you. To take out Anubis after figuring out if he has a Horcrux." Harry said.

"Error?" Jack asked.

"Auror" Hemione corrected "A dark wizard catcher."

"About your Anubis, I heard of him when I was in Egypt." Ron said and told them what he knew.

"That's bad" Daniel said. "What if he's a wizard taken as a Goa'uld host, ending up sort of ascended. I think we will need both your magic, technological mastery and raw firepower to take him out."

"We're going to our Ministry to have a meeting." Hermione said putting the tennis ball on the table.

Jack looked at the tennis ball.

"Everyone put a finger on the ball." Harry said.

They did and Jack looked amused by the group of seven people gathered around a ball.

"Are you saying we're going to one of those wizard places?" Jack asked.

Harry nodded.

"I better notify Hammond we're about to disappear for a while."

Soon they all stood with a finger on the ball and Hermione activated the port key. The four members of SG-1 were thrown into the room. Jack hit a table.

"Ouch" Jack grunted. "And... cool."

"Indeed" Teal'c agreed looking around the room.

Sam was about to say something but Jack interrupted her.

"Please... don't... let's stay with the technical description cool for now."

Sam smiled and was already thinking about her future scientific report on this mission.

"Welcome to the Ministry of Magic." Harry said turning to Hermione "Send for Kingsley and Gawain."

A few minutes later they were all gathered around the table bringing everyone up to date on what they knew. Jack looked at the wizards and the witch.

"All right, before we go up against Anubis, we need to know how your... skills... work against some of the technology we've encountered."

Gawain caught on and asked what he had in mind. Jack put a zat on the table.

"That's what I have here right now, but back at the SGC we can do further testing. It's a zat gun, sort of stuns people, unless hit twice in a row. I wouldn't send you anywhere without knowing your magic works."

Gawain produced a shield charm and Jack fired the zat. Being a non-human technology the zat worked at the Ministry.

Kingsley looked at Gawain.

"The zat gun doesn't do much against the shield charm." Kingsley said

"What would penetrate that shield?" Jack asked.

Kingsley turned to Harry.

"Would you and Gawain show a bit of friendly duelling to accommodate the Colonel?"

Harry nodded and bowed to Gawain. After that they duelled, keeping it to disarming, shields, and stunners. Still a stunner smashed a chair and the last one before the duel was interrupted bounced off the shield and hit Jack.

"Ouch" he groaned as Hermione revived him "That hurt."

"Sorry about that"

"No, don't be. It was a refreshing change to getting zatted." Jack said politely "After all I was the one whacko enough to ask for it."

"Are you all right sir?" Sam asked.

"Yes Major. You know what a zat blast feels like. Double it and you're getting there with this stunner."

Harry went to the chair and used the Reparo to put it back together. Sam knew to keep her mouth shut this time about a theory of something like a memory on a quantum level, putting the molecular structure together in a previous state, and in that way repairing the chair.

The meeting ended with Harry, Ron, Hermione and Gawain forming a team to work with SG-1. The objective was taking out Anubis, but also learn more from each other. They would continue testing the macical skills against the various technologies at the SGC before actually going after Anubis.