Half an hour later, SG-1, plus Harry and Cassandra were gathered in the briefing room, preparing to be beamed back to her flat in London. Jack O'neill gave them a salute and a second after the group had been enveloped in bright white light, they reappeared in a small tidy apartment.

"Alright. The first thing we have to do is go to the school. It will be difficult for all of you to get in, and once you do, the students will not accept you, and moreover your scientifically oriented minds will have difficulty comprehending the reality of magic within the castle." Harry explained as they stood in Cassandra's living room.

"And another thing, we need a surreptitious form of transportation from here to the school."

"What, like a car?"

"The best way to get there is to take the train to Hogsmeade station. Hogwarts is a little out of the way, to keep muggles from finding it. Not only that, but several safeguards have been placed on the castle. When a muggle gets too close, he or she is suddenly reminded of a very important errand he or she must attend."

"So… how are we going to get through? Clearly we're all… muggles, as you call us." Cassandra asked

"You are all muggles, I am not. Perhaps I might be able to find some sort of spell or just drag you along with me to the castle." Harry replied

"A spell?" Sam asked incredulously. With a roll of his eyes, Harry extended his arm and focused on a vase sitting on the end table of the sofa. After a few moments it levitated a couple of inches in the air and he gently set it back down again.

"If this is going to work, I need you to begin to accept that magic is real and not everything can be explained by the count of protons and electrons."

"But I…"

"Sam, just let it go." Daniel placed a comforting hand on her shoulder and she appeared to calm down somewhat, despite the fact that she was still fuming over the idea that a person could levitate a vase simply by focusing on it.

"Alright, I have a friend I knew while I was in school who is just the person to help us figure out how to get all of you into Hogwarts, the problem is in contacting her… I don't suppose you have an owl?" When Cassandra merely stared blankly at Harry he sighed and said

"Apparation it is then, I'll be back in a few minutes. I'm going to disappear with a bit of a sound and I'll return the same way."

"Wait. I don't want you going off alone." Sam interjected.

"Very well, who do you suggest should come with me? I don't recommend side-along apparation to any of you because you could find yourself splinched and that is no fun at all."

"Excuse me, but if you could explain, I have no idea what the hell you just said." Daniel looked at Harry expectantly who rolled his eyes again and mumbled about how wizards must have felt explaining things to him when he first entered the wizarding world.

"A side-along apparation is when someone who is not of their own ability to apparate holds onto a wizard who is able and travels to the same destination with them. Splinching occurs when someone has apparated and some body parts are accidentally left behind. If any of you want to risk it, then by all means come with me, otherwise, I will return shortly."

"I will go." The large solemn man in the background stepped forward following his statement made in a booming bass.

"Are you sure, Teal'c?"

"I am positive Colonel Carter."

"Alright, just hang onto my clothes." Teal'c took the collar of Harry's shirt in his large fist and Harry concentrated very hard on Hermione's residence. The familiar uncomfortable sensation of being forced through a tight rubber tube was followed by blissful relief when he found himself outside Hermione's front door. He rapped sharply and a few moments later, a pair of brown eyes appeared through the viewing window.

They scrunched at the corners as she smiled and when she opened the door she promptly threw her arms around Harry in an affectionate hug, all the while speaking in an incoherent voice about not having seen him in ages. Teal'c observed the situation with a single raised eyebrow, and Hermione was quite surprised when she noticed him standing there.

"He's a muggle, isn't he?"

"Sort of." Harry replied sheepishly

"Sort of? How can it be 'sort of'? You are either a muggle or a wizard. That's the way things work."

"Then by your definition, Hermione, he is a muggle. But, he is also an alien."

"An alien? As in he doesn't have a visa?" For being such a brilliant witch, Hermione could be incredibly dense sometimes.

"No, as in, he was born and raised on another planet."

Hermione gaped for a few moments at the revelation before she hurried them both inside and began mumbling something about tea getting cold. When she set out cups and the kettle, she sat down and faced the two men.

"Why are you here, Harry?"

"I need to get a group of four muggles into Hogwarts."

"What? Are you batty? There is no possible way that you can take muggles into Hogwarts. It's never been done, there are spells and defenses and safeguards against it specifically so that muggles don't know about our world."

"But they sort of stumbled into it because of me."

"How do you mean that?" Hermione's forehead was a cluster of tight lines, her eyebrows hitched almost as high as Teal'c could manage as she tried to process what Harry was telling her.

"Apparently Voldemort was some sort of evil alien that is able to take over people by possessing them and controlling their brains. When two people who are possessed by those aliens have a child, they are called harsesis and have a certain element in their blood and the genetic memories of the aliens that created the child." Harry tried to explain

"And they think you're one of these… harsesises? Harseses? What's the plural of that, anyway?"

"Harsesis." Teal'c stood solemnly in the corner, startling Hermione when he spoke.

"One of the muggles identified me because she could sense that element in my blood." Harry continued.

"But if you were imbued with the genetic memories of your parents, wouldn't you know it? Unless…" She trailed off uncertainly.

"Pensieve."

"Of course!" she exclaimed, "And you want to look through Dumbledore's old things to see if there is some way that you can find out exactly what happened?"

"Yes."

"Then why are we still sitting here talking?" Hermione jumped up and opened the door to a large room at the back of her home that was entirely filled with books.

"You know, Hermione, one of these days I'm just going to buy you a library for Christmas."

"That would be smashing, but for now, I just need this." She held up a thick volume bound in leather

"Alright, you should probably come back with us, the others will be wondering what happened."

"Can I side-along with you? I'm not exactly sure where we're going."

"For now, a flat in London, and then Hogwarts."

"Right, let's go."