Disclaimer: I don't own Doctor Who that goes to the BBC.

"Greyhound Forty to Trap One," the Doctor said into the radio as they drove. "Repeat: can you hear me? Over."

"Why is it not working?" Ross said.

"Maybe the Sontarans are jamming it," Rose suggested.

"Must be. And if they can trace that, they can isolate the ATMOS."

'Turn Left'.

"Try going right," he told Ross.

"It says left."

"I know, so go right."

Ross tried turning the wheel. When nothing happened, he let go, the car still continuing to drive.

"I've got no control. It's driving itself. It won't stop." He stopped trying the break and moved to the door. "The doors are locked!"

The Doctor started sonicing the sat-nav. "Argh! It's deadlocked! I can't stop it!"

'Turn Left'. Automatically, the Jeep swerved.

"Yeah, let me..." Ross said, smashing the GPS.

"The sat-nav's just a box. Its wired through the whole car," the Doctor said.

The jeep swerves off the road.

"We're heading for the river!" Ross cried.

"Going to have to be faster than breaking a window. ATMOS, are you programmed to contradict my orders?"

'Confirmed'.

"Anything I say, you'll ignore it?"

'Confirmed'.

"Then drive into the river. I order you to drive into the river! Do it! Drive into the river!"

The breaks screeched as it did the opposite of what he told it to. They came to a halt right before

they toppled off the edge of the bank. At that moment, the doors opened and they almost fell out in their scramble to get away. The sat-nav was going crazy with its instructions as it overloaded.

"Get down!" the Doctor cried as the ran.

The three of them dove to the ground, and he covered Rose with his body. The sound of the sat-nav going crazy got faster and faster. Finally it got to that point where it couldn't last any longer. They braced themselves...

'Pifft!'

They looked up at the sound of the pathetic hiss.

"Oh, is that it?" he said.

"A bit disappointing," Rose said.

"Very underwhelming."

"Like Belgium."

"What?" Ross asked, confused by the conversation.

"It's alright, Ross. Just a bit of a joke. So... What do we do now?"

"Well," Rose said, pushing him off her so she could look around. "I don't think we're too far from Chiswick. We could walk there. Meet up with Donna."

The Doctor sighed. "Oh, alright. Best we get started then."

They walked down the roads looking at all the houses. It was a pretty nice street.

"So, erm... what one is hers?"

Rose rolled her eyes. Of course he wouldn't remember the address. She was lucky he had remembered where she lived the first time. "This way." She led them down the next street and up a path to a house. She rung the doorbell and the Doctor came to stand beside her. Not long the door swung open to reveal Donna.

"Hi," she grinned at her friend. The Doctor, however, had a different approach.

"You would not believe the day we're having."

"Really?" Donna said in amusement, seeing the look on Rose's face.

"He had to walk," she said in mock horror. "From all the way just outside of Chiswick! It was horrifying!"

"Alright, enough, you," he said, lightly hitting her up the back of the head as she laughed. Her hair flooded over her face, making her laugh more, and Donna joined in. "Stop it, we have a serious issue!" This just made Donna laugh more.

"No, no... he's right," Rose said attempting to calm down. "Luke Rattigan just tried to kill us."

"Kill you?!"

"With the ATMOS system. Know anyone who's got it in their car, we need to look at it," the Doctor said.

"Uh, yeah. Mine," she said, pointing out to a blue car on the street. They recognised it as the same car in the ally by the TARDIS that day.

"Thanks." He walked off down towards the car. Ross headed in the same direction when he saw him move. Rose and Donna gave each other a look before they followed.

Over by the car, the Doctor was examining started to examine it, looking underneath it at the ATMOS before he got up and opened the bonnet. As he was doing this, Rose got out her cellphone to call Martha. She'd need an update on the situation.

"I'll requisition us a vehicle," Ross told them.

"Anything without ATMOS," the Doctor said "Don't point your gun at people!"

Ross nodded as he ran off.

"Martha's not answering," Rose said agitated,

"Is it them?" They heard the voice of an older man, accompanied with the sound of footsteps running towards them. "Is it them? Is it the Doctor and his wife, Rose?"He came over to them and Rose blinked in shock. He blinked back at her before he turned to the Doctor. "Oh! It's you two!"

"Who?" The Doctor and Rose said in confusion and the Doctor looked up and both he and Rose turned and looked at the man, pointing at them and they recognized him from Christmas and he recognized them, vice-versa.

"Oh! It's you!" The Doctor and Rose said at the same time as he stopped inspecting the car and went to stand by Donna and the man

"What, have you met before?!" Donna cried.

"Yeah, Christmas Eve. These two disappeared right in front of me," the man explained.

"And you never said?!" Donna cried.

"Well you never said!" He countered and turned to both gallifreyans "Wilf, sir, ma'am. Wilfred Mott. You both must be some of them aliens."

"Well, yeah, but don't shout it out." The Doctor shook his hand. "Nice to meet you properly, Wilf."

"Brilliant," Rose grinned, as she shakes his hand as well.

"Ah, alien hands," Wilf said.

Donna rolled her eyes with an affectionate smile. Then she pulled out her phone and dialled. "Here, how about I give Martha a go? What is it, 'Sonterruns'?"

"Sontarans," he corrected her, elongating the 'a'. "But there's got to be more to it. They can't be just remote controlling cars. That's not enough. Is anyone answering?"

"Hold on." Finally someone picked it up.

"Don't tell me... Donna Noble!" Martha said.

"Martha! Hold on, he's here." She passed the phone over to the Doctor.

"Martha, tell Colonel Mace it's the Sontarans. They're in the file. Code Red Sontarans. But if they're inside the factory, tell him not to start shooting. UNIT will get massacred. I'll get back as soon as I can. You got that?"

"Code Red Sontarans. Gotcha," she said. Then she hung up.

"Right," he said. "Time to get back onto this." He went back under the engine of the car and began fiddling with the settings on the sonic.

"You've tried sonicking it before, you didn't find anything," Donna reminded him.

"Yeah, but now I know it's Sontaran, I know what I'm looking for."

"The thing is, Doctor and Rose," Wilf suddenly interrupts "is that Donna is my only grandchild. You both have gotta promise me you both are going take care of her."

"She takes care of us!" the Doctor said.

"Oh, yeah, that's my Donna," Wilf said, happily "She was always bossing us around, even when she was tiny. 'The Little General' we used to call her."

"Yeah, don't start," she warned.

"And some of the boys she used to turn up with. A different one every week," he added "Here, who was that one with the nail varnish?"

"Matthew Richards," she answered "He lives in Kilbourn now. With a man."

Suddenly they were all surprised when spikes shot out of a grid of holes in the device. "Whoa! It's a temporal pocket!" the Doctor cried. "I knew there was something else in there, It's hidden just a second out of sync with real time."

"But what's it hiding?" Donna asked

"I don't know, men and their cars!" The voice caused them all to turn and look at the sound of the voice of Donna's mother: Sylvia Noble. "Sometimes I think if I was a car..." That's when she spotted the Doctor. "Oh, it's you! Doctor... what was it?"

"It's just 'Doctor',Rose told Sylvia.

The Doctor waved at her too, without looking. "Yeah, that's me."

"Have you met them as well?" Wilf said in surprise.

"Dad, it's the couple from the wedding! When you were laid up with Spanish flu. I'm warning you, last time those two turned up, it was a disaster!"

"If we weren't there it would've been worse than it was," Rose said. And just as she said this, gas began spewing from the ATMOS device.

"Get back!" he shouted at them and they all shuffled back a good few metres and watched as the gas continued to spurt out in a mass cloud. It was hard not to breath it in for Donna, Wilf and Sylvia, it tasted toxic. Beside Rose, the Doctor held up his sonic screwdriver and began to use it on the ATMOS device. Soon it shorted out and the gas stopped spewing out, but still hung around. "That'll stop it."

The Doctor then rushes back to peer under the hood again.

"I told you!" Sylvia cried "He's blown up the car! Who is he anyway? What sort of doctor blows up cars?"

"Oh, not now, Mum!" Donna said

"Oh, should I make an appointment?" Sylvia said huffily, before storming off.

"Blimey, she's worse than Jackie," Rose muttered, talking about her stepmother.

"That wasn't just exhaust fumes," the Doctor said "It's Some sort of gas. Artificial gas."

"And it's aliens," Wilf guessed "is it? Aliens?" It was adorable how excited he seemed by the prospect.

"But if... if it's poisonous... then we've got poisonous gas in every car on Earth," Donna said.

"Possibly 800 million cars filled with poisonous gas," Rose said. "That's enough to cover the Earth anywhere there's lots of cars. No one would be able to breath..." They looked around the street. Every single car here had ATMOS installed.

"It's not safe," Wilf told them. "I'm going to get it off the street." He jumped into the car and they heard the locks click.

No, don't!" Donna cried, rushing to his door. Suddenly, the gas started pouring thickly out of the exhaust pipe. "Turn it off! Granddad, get out of there!"

"I can't! It's locked!" he called. He held up the key to show her. "It's the aliens again!" Donna tried to get the door, while Wilf banged on the window and honked the horn.

"What's he doing?" Silvia shouted from the front door. "What's he done?"

"They've isolated it!" he said, trying to sonic the engine again.

"There's gas inside the car! He's gonna choke! Doctor! Rose!"

The Doctor and Rose joined her at the door and Rose tried to open the Door with her sonic screwdriver.

"It won't open!" They heard honking and turned to see that every car on the street was spewing out gas too. "It's the whole world."

"Help me! Get me out of here!" Wilf cried weakly as the Doctor ran back around the front. Rose kept trying to open the door with her screwdriver and The Doctor tried ripping cables out of the car and the device, but nothing was working. Nothing would stop it. They couldn't get Wilf out.

Sylvia rushes into the house, just as Wilf collapses inside the car and both the Doctor and Rose then stood in the middle of the gas "Doctor! Rose!" Donna yelled at them and they look back.

There was nothing they could do.

To be continued...

Please review and tell me if I'm making Rose sound like well... Rose. Because I don't know how to write her properly. And I still need a Beta-reader.