I have an exam tomorrow, and being the logical person that I am, instead of revision I wrote and posted this instead! This chapter seemed to come really easy and didn't take me long to write, so I guess it's ok...

Disclaimer: I don't own Doctor Who.

xxx

All Rose could hear as she hurtled down the corridor was the stamping of feet behind her, growing ever louder and closer. She had no idea where she was going and was praying that she didn't find herself in a dead end.

She reached a flight of stairs and ran up them three steps at a time, gasping for air in ragged breaths, her legs burning. Back when she travelled with the Doctor, this would have been easy. She must be out of practise.

As she reached the corridor, she was suddenly slammed into a wall by a body careering into her from the side. She coughed, winded from the impact, spinning around to see who had run into her, only to find Jack.

"Rose!" he gasped, sounding as out of breath as she was. Behind him she could see the corridor he'd just come down, and the guards that were following him. She couldn't seem to form words, and just stared with wide eyes. He quickly grabbed her hand and pulled her down the corridor.

xxx

"Come on… come on…" the Doctor muttered to himself as he reached desperately for his sonic screwdriver. He could feel it on his fingertips, just a few more millimetres…

"Yes!" he shouted triumphantly as he finally managed to pull it towards him. He picked it up and kissed it, then ran across the cell and held it out to the device that was on the wall that the guards had run their key cards through to lock the door. The screwdriver whirred away, but did nothing. He shouted in anger as he realised what was happening, and dropped his hand to his side and hit his head against the wall. "Bloody deadlock seals…" he muttered.

Suddenly he heard the door open and looked up in horror. If he got caught by guards now…

He breathed a sigh of relief as he saw Martha run breathlessly into the room. She quickly faced the door and shut it behind her, not noticing him.

"Martha!" he called, and she spun around. Her face light up as she saw him.

"Doctor," she gasped happily, running up to him, "you're alive!"

"Yeah, listen, you need to get the key card from the guard," he said, nodding to the man lying unconscious on the floor. Martha quickly knelt down and started looking through his pockets.

"What did you do to him?" she asked.

"He's fine, just unconscious. Hurry up!"

"Ok, ok, calm down," she muttered as she found the key card and stood up. She turned to the device on the wall and slid the key card through the slot. A message appeared on the screen. "Oh dear," she said quietly.

"What? What is it?" the Doctor asked urgently.

"It says it needs a second verification," she read out, "another key card," she turned to the Doctor, "but when Jack got us out he only needed one."

"My cell must have higher security. Dammit!" he punched the wall angrily.

"Can't you use the sonic screwdriver?" Martha suggested, but he shook his head.

"It's a deadlock seal, the sonic screwdriver can't open deadlock seals," he explained. They stood in silence for a few moments, as they tried to think of what to do.

They looked up suddenly as the door opened, but were relieved to find Rose and Jack.

"Doctor!" Rose cried happily, running up to him and hugging him through the bars, "thank God you're ok." He hugged her back, but quickly separated from her.

"They've found her," he said urgently, "they've found Aurora."

"What?! How?" Rose gasped.

"I don't know, listen! We need another key card to get me out," he explained. Rose looked over to Jack, who quickly pulled the key card out of his pocket. He went to the device on the wall and swiped the card through it, and the lock to the Doctor's cell clicked open. "Brilliant!" he enthused, running out. He went to the table and hastily stuffed his belongings into various pockets.

"We haven't got much time," Jack said, "we managed to lose the guards but they'll find us again soon. The whole building's on red alert." The Doctor nodded slowly, taking this in.

"Right," he said, "first thing's first, we need to get back to the TARDIS. If we're lucky, I should be able to get us back to Jackie and Aurora before Torchwood get there." They all nodded.

"But how do we get to the TARDIS?" asked Jack, "there are guards everywhere."

"Can't you teleport us back?"

"Not in here, they've put defences up." The Doctor nodded, and looked around for inspiration.

"Air vents?" he suggested, looking up.

"Already tried that, they've turned the heating up, we'd boil in there." The Doctor nodded again.

"Then I guess there's only one thing for it," he said, heading to the door. "We run!"

xxx

Jackie clutched her granddaughter close to her, awaiting the guards. She could hear them getting nearer, it was only a matter of seconds until they'd reach her.

Suddenly there was a massive explosion, and the screeching of car tyres. Jackie snapped her eyes open to see a van driving through the surprised guards, and skid to a halt in front of her. The side of the van opened, and Mickey held his hand out.

"Come on!" he shouted, and she quickly did as she was told. He pulled her up and closed the door, and the van was off again.

Jackie gasped for breath on the bench she was sitting on, still clutching Aurora tightly.

"Thanks," she said hoarsely. Mickey nodded.

"You'd better be grateful for this," came a voice from the driver's seat. Jackie looked round to see Jake there. "I'm risking my butt for you," he said as he skilfully drove through the Tyler's garden.

"I am grateful!" she assured him. She looked back at Mickey. "I suppose the Doctor told you to do this," she said, but he shook his head.

"I heard that they'd found Aurora and thought that you might need some help," he said. Jackie was pleasantly surprised that she didn't need to thank the Doctor for this.

"Oh good," she said, looking out the window as they went onto the road.

xxx

Rose and the Doctor ran down the corridor, hand in hand, for the second time that day. The group had split in half, with Jack and Martha going another way. They'd been running for ages, as the Doctor tried to remember where the TARDIS was. He kept pulling her down different corridors in an attempt to make sure they didn't meet a group of guards coming the other way. So far, it had worked.

The Doctor pulled her up another set of steps, and they ran breathlessly along the corridor. Rose decided that when they got to the TARDIS she would have to have words with him about using all these steps. They'd gone up about 5 floors now and she was sure that the TARDIS was on the same floor they'd been on.

They ran round a corner, knocking over a few people on the way, and headed straight down the corridor to the lift, the doors of which were already closing. The Doctor pulled her that little bit faster, holding out the sonic screwdriver. They managed to reach the lift just in time, and skidded into it, hitting the back with a thud. They both stood for a second, panting, leaning against the wall.

"Rose?!" gasped a voice. Rose looked up to find a friend of hers in the lift with them, staring at them with wide eyes.

"Susan!" she greeted breathlessly, "long time no see."

"What the hell happened to you?!" she asked, scandalised, "I've heard all sorts of rumours!" her gaze went slowly from Rose to the Doctor, "and who's this?" she asked, her tone changing dramatically.

"This is the Doctor," she said, gesturing to him, "Doctor meet Susan." She held her hand out and he shook it.

"Nice to meet you Susan," he said, "Nice name, that. I like it," he added quickly, before taking his hand back and reaching into his jacket. He pulled out the sonic screwdriver and went up to the lift controls. Susan's attention went back to Rose.

"So, what happened to you? Some people are saying that you stole something from here, some are saying that you're family is alien, that you've brought an alien here, that you are an alien, some people even said that you died!"

"You lot and your human gossip," the Doctor muttered as he whirred the screwdriver at the buttons, "It's a wonder you ever get anything right." Susan frowned intensely at him.

"What's that?" she asked, pointing to the sonic screwdriver.

"Sonic screwdriver," the Doctor answered.

"What are you doing with it?" she asked.

"I'm disconnecting the lift controls from the network, so they can't take us to another floor and capture us," he answered. Susan took a step back.

"Oh my god it's true," she whispered, pointing accusingly at the Doctor, "You're an alien," she looked over at Rose, desperate not to believe this was happening.

"Yeah, he is," Rose admitted, "but I'm not, I'm as human as they come. Promise. It's just him." Susan looked between the Doctor and Rose.

"How do you know an alien??" she gasped.

"Um… it's a long story," Rose answered.

"They said you stole something – is that true?" Susan asked, but the Doctor answered before Rose got a chance to.

"What we 'stole' Torchwood never had the right to have in the first place," he said, "I was taking back what belonged to me."

"What was it?" Susan asked.

"A message, from my people to me. Torchwood intercepted it and took it before I got the chance to."

"They said that they were protecting us against you, that you were trying to take over the world or something."

"Pfft," the Doctor laughed, "that's the last thing I'd do, I seem to spend most of my time protecting this world." Susan nodded slowly, as things began to make sense. Torchwood had been telling them that Rose and the aliens were bad, but in reality it was the other way round.

Her train of thought was interrupted as the lift suddenly came to a stop, and the doors opened. The Doctor grinned as he put the screwdriver away.

They looked out and saw groups of guards in the large storage room the lift had come to, most of whom were restraining Martha who was trying to get to the TARDIS, which sat in the middle of the room. The guards looked momentarily surprised to see the lift there.

"Oh look at that for timing," the Doctor said, grabbing Rose by the hand and running out into the room towards Martha.

The last thing Susan saw before the doors closed and the lift began to ascend again was the Doctor pulling Martha out of the grip of the guards and pulling both women into the strange blue box into the centre of the room.

xxx

The doors of the TARDIS flew open as Martha and Rose burst into it, quickly followed by the Doctor. He threw the doors closed behind them and immediately ran up to the consol, while Rose and Martha stayed leaning against the rails, still slightly out of breath. The Doctor ran his hands over the controls and turned the screen to face him. Rose turned to Martha.

"Where's Jack?" she asked, and Martha shook her head, looking sad and guilty.

"I don't know. We got separated. We were running and one minute he was there and suddenly he wasn't. I went to go back but the guards were there… they must have caught him again," she said breathlessly. She looked up at the Doctor. "We're gonna go and get him, right?" she asked.

"We can't," the Doctor said to both women's surprise, "we've gotta save Aurora."

"But we can't just leave him!" Martha argued.

"Jack's a big boy, he can take care of himself," the Doctor said.

"But…" Martha looked to Rose for help, but she wasn't protesting. Instead she was reaching into her pocket and pulling her phone out.

"If they haven't got there yet, I can at least warn her," she said as she dialled the number and held her phone to her ear. When Jackie answered, her voice was loud enough for even the Doctor to hear.

"Rose!"

"Mum! Listen! You have to-"

"Torchwood came!" Jackie interrupted, "they came and tried to take Aurora!" Rose, Martha and the Doctor both looked at the phone in confusion. "Oh Rose they were everywhere! I couldn't get away from them they just kept coming…" Rose watched the phone for a second Jackie continued her rambling.

"Mum, stop, where are you now?" Rose asked.

"I'm with Mickey and Jake, they rescued me," she answered. Rose and the Doctor both breathed a sigh of relief. "I'm in their van now," Jackie continued. The Doctor gestured Rose to pass the phone to him and she did so.

"Jackie?" he said as he put it to his ear.

"Hello," she replied.

"Jackie, listen, just keep going, drive anywhere. Don't stop and don't let Torchwood find you." He held the phone by his hear with his shoulder as he began to adjust some controls on the consol, "We'll get back to you later."

"But what happened? How did Torchwood know about Aurora? Where are we meant to-"

"Shh! Just do as I say. Just keep going, anywhere. Go around in circles if you must, just don't get caught. Try to stay in crowded places, that way they're less likely to attack."

"But how did they find out about Aurora?" the Doctor sighed in anger at her persistent questions.

"They took my DNA and did a scan of the area. Now we have to go, for all we know they could be tracing this call," he lifted his hand to the phone. "Good luck," he said, then hung up and tossed the phone back to Rose, who pocketed it.

"We can find Jack now then?" Martha asked, and the Doctor nodded.

"I'll do a scan for him," he said, "with any luck we might be able to materialise around him." They waited for a moment until there was a beep. "That's interesting," the Doctor muttered.

"What?" asked Rose.

"He's not in the building," he reached out to a dial and rotated it.

"He must have escaped," Marta said happily.

"Good old Jack," Rose laughed. But the Doctor was still looking anxious.

"He's not outside Canary Warf," he said, still adjusting the dial. Rose and Martha looked at each other, then back at the Doctor.

"Well can't you do a scan of London find where he is?" Martha asked.

"Doing it now," they waited a few more seconds until the TARDIS beeped again. "Oh," he said, "that's not good."

"What?" Martha and Rose asked.

"He's not in London."

"He's got to be hasn't he?" Rose asked, "I mean where would he have gone?"

"I don't know but he's not here!" The Doctor answered, "I'll expand the search," he pressed some more buttons and watched the screen. As the seconds passed, his expression became more urgent. "Ok, that's really not good," he said after a while.

"What? Where is he?" Rose asked nervously. The Doctor looked up at her and Martha.

"Forget London," he said anxiously, "he's not even on the planet."