I don't own Harry Potter or Stargate SG-1. I haven't edited this very well, it's a random idea I decided to indulge at three a.m. I am still writing on my other HP fics and the Sherlock fic, I just tend to jump around to different ideas.

Harry's eyes widened as he took in his unfamiliar surroundings. Men and women in fatigues milled about, their voices bouncing off the concrete and metal of the lit end of a long hallway. A Klaxon alarm sounded. He scrabbled at the cloak in his expanded pocket and threw it over himself, then darted into a nearby doorway before it could close.

Harry stared in disbelief. More soldiers occupied this room, but their attention was fixed on a stone ringed vertical pool of water. The voices around him had an odd sound, not an accent from the British Isles...American? Was he in the middle of some kind of American Wizard military base? Did they even have those?

Harry's eyes nearly fell out of his head as people began to walk out of the pool, their boots clanking on the metal ramp, strange looking weapons in their belts and guns in their hands. Harry cursed his curiosity, vowing that if he ever got back to Hogwarts, he'd never go back to explore Slytherin's chamber and touch the artifacts ever again. To be fair though, how was he supposed to know the cute little snake bookend in the hidden library was a portkey?!

...

Two weeks was a long time. In that time, Harry had managed to avoid being caught. He had also done some investigating. He was stuck in what was called Cheyenne Mountain, a muggle military base. Officially anyway. Unofficially, it was an American military run space program utilizing alien cosmic wormhole technology. Also, Aliens were real. That was a shocker. He'd spent a whole day shadowing an alien called Teal'c, peering at him, until he realized the man could sense his presence. He had cleared off rather quickly after that.

Despite all of the fascinating opportunities for spying he was getting rather sick of crawling around, hiding in closets. Due to the layers of security he was unable to make it above ground. He'd managed to steal food, but hadn't gotten a decent shower since he had arrived, and the clothes he stole were all rather baggy, but that was nothing new.

Hidden in a corner of the mess hall under his invisibility cloak, Harry eyed the buffet. He sighed. Tuna casserole was really starting make him want to vomit. Whoever made the dinner menus needed a good swift kick. Didn't they know that eating the same grey sludge once every three days was not good for morale?

Harry started to shuffle for the "food", deftly avoiding a chattering couple with their trays of glop. Grabbing a biscuit, Harry felt a tug, and a slither, and his heart stopped. Someone stepped on the cloak. The mess hall went quiet. Harry turned, the cloak pooled around his feet, his biscuit still clutched in his hand. The eyes of the entire room were fixed on him.

"Who's kid is that?!"

"Where'd the kid come from?!"

"He was invisible!"

"Damn." Harry muttered.

...

Harry sat up in his bunk as the door to the holding cell opened and a young man with floppy brown hair and glasses stepped through.

"Hi. I'm Daniel Jackson." The man smiled, his hands in his pockets.

"Hi." Harry mumbled.

"What's your name?"

"Harry."

"That's a nice name. How old are you?"

"I'm twelve."

"They told me you wouldn't talk to them. You just kept asking for me. Do I know you?"

"No. I just thought you seemed nice."

"Well, thanks. How long have you wandering around here?"

"Two weeks."

"They're pretty intrigued with that cloak thing you were wearing. Our scientists can't figure it out. Can you tell me what it is?"

Harry stiffened. "Don't let them ruin it!"

"They won't, they just want to study it." Daniel decided to move on to safer topics. "Where did you come from, Harry? How did you get into the complex?"

"I...I can't tell you."

"Harry, if you came in with a gate team we can send you back to your home world, but you have to tell us more about yourself now, or you might get carted off to another facility for interrogation."

Harry stayed silent.

Daniel sighed.

...

Severus Snape was pissed.

After one semi-illegal blood based location spell, very little sleep, not enough coffee, two weeks and a day of searching, and three hours circling the perimeter of the Cheyenne Mountain muggle military complex, he had found where Harry Potter was hidden. Underground, apparently, behind probably one hundred layers of security and innumerable gun toting psychopaths.

Fantastic.