Donna nodded. "Wonder what they want." The Doctor said as he went to the door.

There were indeed soldiers out there. He recognised the uniforms. Half of them were marines, the others half were UNIT. One of them in a UNIT outfit stepped forward and saluted.

"Sergeant Hamilton, at your service sir."

"Don't salute." The Doctor said immediately. "What are you doing here?"

"A former UNIT officer who now works as a police officer was called out to a kidnapping call at Princeton Plainsboro. When the Chief of Medicine mentioned an English man called John Smith who talked about aliens, the officer called UNIT's New York HQ and they called the TARDIS, using a number obtained from the British Prime Minister. When the man confirmed that he was from Princeton Plainsboro, they called us out."

The Doctor smiled. "Brilliant! Right, round up the aliens and get them out of here, there's a bomb on the TARDIS and the building is going to collapse when we get rid of it."

Sergeant Hamilton looked confused. "What aliens, sir?"

"What do you-" The penny dropped. "They must have run off! Right, tell me there's still a great big engine hooked up to a Dell in the middle of the building."

"Is that what it is? We thought it was a weapon."

"It's an engine to power a weapon. Don't touch it. Get everyone out of here then."

The sergeant turned to the rest of his troops and shouted, "Right, you heard The Doctor, evacuate the building! There's a bomb, everybody out!" They all ran off, leaving the TARDIS in the middle of a deserted corridor.

"Right. That was lucky." The Doctor remarked, closing the doors behind him and walking up to the monitor. He turned some of the dials and a plan of the building showed up, with red dots scattered around it. The dots were moving down and out of the building. "All we have to do is wait until they leave and then take off."

"What about us?" Wilson asked.

"Wilson! What are you doing? If we were quiet they would've forgotten about us and they'd leave with us on board!" House complained.

"House, if I wanted to see outer space I would've become an astronaut. As it is, I have enough trouble leaving Princeton, never mind the planet!"

"Where's your sense of adventure?"

"I donated it to a cancer patient. We are not going to some asteroid and that's it!"

There was a thunk as the column stopped moving. Wilson hadn't even noticed taking off.

"What, where are we?" he asked, with a foreboding feeling in the pit of his stomach.

"Oh, sorry, I decided not to wait for you to finish. We're on an asteroid about, ohhh, 3 light years from Earth? Yeah, 3, that's about right."

Wilson gaped.

"I have to see this." House said, limping over to the door.

The asteroid wasn't very big. It was about the size of a football pitch, and was a dusty grey. The stars in the sky, however, were another matter.

"This is so cool." he said, staring out at the inky blackness.

Wilson stepped out after him eyes wide in shock. "we're, we're we're..."

"In space. Yeah, I figured that out. Do you have your cell phone? Cuddy will never believe me..."

Wilson, still in shock, passed his mobile to House who started taking pictures.

"Don't go too far." The Doctor warned, coming out of the TARDIS carrying the bomb. He chucked out and onto the asteroid, where instead of falling, glided up and around. "It's caught in the gravity field." The Doctor announced, as House watched with glee and Wilson with disbelief as it rotated slowly away from them.

"Time to take you two home." he said, and set another course for Earth.

When they landed, Wilson staggered out of the TARDIS, followed by House who was limping happily away with a new black cane the Doctor had given him to replace the one he'd lost. "Be careful with it, it cost me fifty credits."

They'd landed outside the hospital. It was still the middle of the day, although no one seemed to notice the police box that had suddenly materialised.

The Doctor stepped out, Donna behind him.

"We'll send Malcom back to his own planet. He'll at least get a fair trial, which is more than can be said if we gave him to the Judoons."

House shook his hand. "That was fun. We should do it again sometime."

"No, no,no,no." Wilson stammered, shaking his head furiously, and pointing a shaking finger at The Doctor. "We are never, ever going anywhere near you ever again!"

"Don't be such a wimp Wilson." House said. "We saved the planet, we deserve a bit of fun." He glanced towards the entrance of the hospital. "Then again, it looks like we're going to have our work cut out here for a while."

"House! Wilson! Oh my God, where have you been!" Cuddy was running towards them. To House's surprise she pulled him into a hug. "I was so worried." She released him and grabbed Wilson into a hug as well.

Then she hit House. "Don't ever run off like that again!"

House rubbed his arm. "Hey, I thought you said you missed us!"

"Do you have any idea what you idiots put me through!"

"We've only been gone a few hours!"

"A few...? You've been gone nearly a week!"

Wilson's eyes bulged. "A week! Oh my god! All my appointments, my patients, I've got to-" He didn't even finish his sentence, and ran into the hospital.

"Oops." The Doctor said guiltily.

House rolled his eyes. "Typical Wilson. He stops an alien invasion, and then he worries about missing work to do it."

"An alien invasion? Are you all right House?" Cuddy asked.

"I'm fine, and I've got pictures to prove it. But first." He limped over to where The Doctor and Donna were leaning against the TARDIS.

"You'll be leaving then." The Doctor nodded.

"Okay. Mind control, split personality, liver damage. A little more dangerous than my normal week, but hey, at least we saved the planet. That's six billion people out there who owe me their lives. That has to be a record."

"Doesn't beat mine." The Doctor boasted.

"You're an alien, you don't count. I suppose I should thank you, for saving my life as well."

"You're welcome. Oh, and House, keep an eye out for any aliens creeping around. They might turn up again."

"Oh joy. Well, goodbye, don't do anything I wouldn't do, etc, etc." House turned back to Cuddy. He heard the creak of the TARDIS door and smirked. He stood next to Cuddy, facing the police box.

"You'll hate this part." House said to Cuddy.

"What are you...?" She trailed off as the TARDIS faded out of sight, accompanied by that strange noise.

House turned and walked into the hospital. "That is one nutty alien."

"Yes, well it started badly, and it tailed off a little in the middle, and the less said about the end the better, but apart from that, excellent."

Basically sums it up I think :).