A/N: I've used two very good TV shows here, to which I don't own either. This one's a story I've had for weeks and thought what the hell, let's do it. Enjoy!

Chuck Bartowski, not for the first time, found himself daydreaming again. It was more of an acquired habit than anything else really. He'd been briefed by Sarah that they would be entering a simulation chamber that afternoon, which was something he couldn't wait to do. If only he could simulate some of the more intimate moments he'd shared with Sarah…

The bell at the Nerd Herd desk clinked, and Chuck turned around on his spinny chair. A tall man with tousled brown hair and a long brown jacket was grinning cheesily at him from the other side.

"Excuse me sir, can I help you?" Chuck asked, relieved that he wasn't flashing and that the man wasn't a terrorist or a soldier or something.

"Yes, well actually I hope so. See I need some computer repairs," the man replied, stretching his face briefly as he spoke.

"Is it an Apple?"

"Do I look like I like Mac computers? Actually it's more of a…. well it's hard to explain really… oh what the hell. I guess that's what happens when you live for 906 years,"

"Are you a gamer? I can point you in the experienced hairy hands of Morgan Grimes,"

"Actually, Chuck, I rather needed your help on this one," the man fetched a pair of glasses and squinted at him. "You're the Chuck Bartowski the file mentions. Good. Now I heard from my friend Martha that you have amazing recollection abilities. The Intersect she called it. Am I right?"

Chuck looked surprised as the mysterious man hurdled over the desk. Don't freak out. Just press the panic button. Get Sarah or Casey to deal with him. Shame they were doing paperwork in Castle.

"Umm sir, I'm afraid I don't know what you're talking about,"

"You know what I think Chuckie, I think you're lying. And I can prove it. Sontaran,"

Chuck's eyes shuttered and before him ran the image of a baked potato like creature in blue armour dashing about the place.

"You just flashed or something. I can tell. Anyway, about that computer, let's see what you can do with my TARDIS,"

*

The place the man led him to was huge. Absolutely huge. It looked like a blue box on the outside, but inside was like a massive spaceship of sorts. The man pointed to a computer screen near the side which was hissing.

"Got shot by a Dalek cruiser. Guess that's what happens when you leave the doors open to brag,"

"Sir, I don't have my tools with me. Do you have anything I could use? Maybe a screwdriver?"

"Will sonic do? And stop calling me Sir. It's the Doctor ok?"

Chuck gulped, hoping Sarah wasn't looking for him. He was just dreaming, far too much time on Mass Effect 2. Chuck hammered at some buttons, and then smiled back.

"Ok Doctor, well it looks like your TARDIS has a virus. Do you McAfee or Norton? I hear they're very good software helpers,"

"Norton? You mean the General of the 51st Century push on Malcassairo?" the Doctor whittled, and got a pen like device from his pocket. Pointing it at the computer, it made a buzzing noise.

"I don't know what you're on about Doctor. But this virus should come out if you perform a hardware scan,"

"Mr. Bartowski, does it look like I have the time to reboot my TARDIS. Right now, a Cyberman spaceship is entering this galaxy looking to defeat the human race and I need to get to it,"

"Well you could try using a Windows patch," Chuck offered, completely at ends with the stranger. How the hell was he meant to fix this piece of spacejunk. He had to struggle not to run screaming from the place.

"You know Chuck, I guess you can't help me on this one. It's fine, seriously. Enjoy your life, and don't tell anyone about what you saw," the Doctor offered. "Oh, and before you go, a little souvenir. Bought from a market on the planet Clom. Enjoy!" the Doctor threw a small rock at Chuck, which he caught. Stepping out of the TARDIS doors, he breathed in and examined the rock in the shadow of the Buy More. Boy was he going to have a lot of explaining to do.

*

The Doctor walked out slightly dejected but optimistic nonetheless. Martha had been right about him, he wasn't an alien threat. Just a harmless geek. Bit like him really.

Which didn't resolve the virus of the TARDIS.

A rustling to the bins alerted the Doctor, and he noticed a scruffy ginger haired man rummaging in the bins.

"Oh wow. A guy with ginger hair!" the Doctor mused, and ran up to the man. "Excuse me, what was it again?"

"I'm Jeff," the man added helpfully, clutching the Farmers Weekly magazines he had collected from the bins. "I got these magazines first dude,"

"Tell me Jeffrey, what do you know about old pieces of hardware?"

"I know they're hard,"

"Perfect. Bit thick, but perfect nonetheless. Now then, how do you fancy travelling in time and space?"

Jeff's eyes widened, and he dropped the magazines instantly.

"Yeah, thought you'd like that. Now then, we have all of time and space to choose from. Where do you want to go first?"

Jeff seemed to consider for a long time as the Doctor hopped around on his feet.

"I want to go 2 months into the past to tell myself not to try the apples,"

The Doctor froze, and then extended an arm around his new companion. This one was going to take some time before he was ready.

*