Author's Note

The Doctor has a way of stopping the alien invasion, but will he make it in time to stop them and keep everyone safe.

The Disclaimer: I own nothing. All rights belong to Russell T. Davies and BBC. I make no money and intend no harm.

Thank you for reading. I hope you enjoy it, any reviews or comments would be great.


"Oi! Doctor." said Rose.

The Doctor stopped with his hand on the door of the T.A.R.D.I.S, he turned to face her. "Problem?" he asked innocently.

"Yeah, there is a problem." she said furiously. "Where do you think you're going?"

"Back to the chamber." he replied nonchalantly.

"Yeah, and what're you gonna do there?"

"Er…try to reason with them?" he said hopefully. He turned to George, "Nah, that's no good is it?"

"That's rubbish, mate." he said.

"Listen," said the Doctor. "I need to go back; I need to talk to them."

"But, why?" she asked desperately.

"I need to find out exactly what they're planning in order to stop them." he said vaguely. "Better?" he asked George.

"A bit." he replied.

"You're not telling me everything, now spill it. What's the real reason you're going back?"

The Doctor smiled at her a little apologetically, "I have to give them a choice." he said simply.

"Are you mental?" Paul asked appalled. "You'll get yourself killed."

"Maybe," he said. "That's why you lot have got to stay behind. I'm not having your blood on my hands."

"No way!" exclaimed Ringo angrily. "We've stuck with you this far. We're not abandoning you now."

"Fine, I don't have time to argue. You can wait outside, keep watch, ok?"

"I'm going with you." said Rose quietly.

The Doctor saw the look on her face and realized she would not be swayed. "Alright." he said. "But first, I have to find something. I think it's around here somewhere."

The Doctor dropped to his knees and pulled a section of grate up from the console floor, revealing the storage area beneath. He sifted through its contents impatiently, and after several minutes produced a small vial. "Ah Ha!" he exclaimed.

"What's that?" asked Rose.

"Turvallinen." said the Doctor. "Everybody ready? Alright, let's go."

They made their way to the docks for the last time. They met no one along the way and there were no guards outside the hatch this time. If the Doctor found the lack of security odd, he didn't say. He opened the hatch and looked at Rose. "If something happens, if I'm hurt and I tell you to leave me and get yourself out, you go. Got it?"

"But-"

"Have you got that?" he asked sternly.

"Yes." she answered stiffly.

"And you four," he said turning on the young men. "You've been a great help, it's been an honor meeting you. Now, if we don't come back within, say, twenty minutes, you run. No questions, no fuss, just go. And do not, under nay circumstances come down after us. Got it?"

They nodded solemnly. "Alright." said the Doctor to Rose. "We'd better go." Once more, he stepped onto the ladder and climbed down into the chamber. He stepped down with Rose right behind him, he put a finger to his lips and motioned for her to follow. They reached the center of the chamber and once more, the bodiless voice spoke to them.

"I knew you would be back." it said.

"I've come back to ask you, properly, to stop what you're doing."

"Oh Doctor, you know that will never happen. Now, don't be shy. You've come here to ask another question, haven't you?"

"What are you planning?" asked the Doctor. "You've only got this little bay, not a lot of room for breeding. So tell me, how do you plan on poisoning the waters of earth?"

"Silly Doctor hasn't figured it out yet. Well, let me enlighten you." As the voice stopped speaking the floor beneath the Doctor's feet began to move. He looked to Rose who looked just as confused as he felt. He looked down and realized that what they had been standing on was a massive circular panel that blended perfectly with the floor. It had just depressed a few inches and begun to slide open.

The Doctor grabbed Rose's hand and led her off, they stood there as the panel opened fully to reveal an enormous vat, about 30 feet in diameter, seething and hissing with a poisonous looking liquid.

"Doctor, what is that?" asked Rose speaking at last.

"Chemicals." said the Doctor. "The same ones the Netvor need to survive the same ones they've been pouring into the bay for months. And by the looks of it they've got enough to contaminate every last drop of water on this planet."

"But how can it spread that far, it's all here." asked Rose.

"Pipelines, like the ones they use to carry oil. How far do they go?" he asked looking at the ceiling.

"All they way." said the voice gleefully. "Every single major body of water on the planet."

"But you couldn't have built all this alone; I mean you can't leave the water. So, whose been helping you, who could have built all this." he slapped himself on the forehead. "Of course!" he said. "O'Neil!"

"Very good, Doctor." came a voice from behind them. They turned and saw O'Neil advancing on them with a gun pointed directly at the Doctor.

"What have they offered you, eh? Cuz, whatever it is, it's not worth it."

"I will rule the humans of earth while my masters take control of the water." he replied smugly.

"Really? World domination? C'mon, and you believed them? You're stupider than I thought, you still don't get it." the Doctor told him.

"And what don't I get exactly?"

"Don't you smell that? The fumes from these chemicals react violently with sunlight. It's not so bad in the bay, there's not enough of the chemicals yet. The second this stuff's dispersed through the water, the reaction will create a toxic gas, killing every single living creature on this planet."

"Liar!" O'Neil screamed. "My masters would never do that, after all I've done for them."

"You have served us well." said the voice. "But, we only needed you to build the pipelines. You have served your purpose; we won't require your services any longer. Your life will be terminated."

"What! No! You can't do this to me!" O'Neil tried to run but it was too late. He hadn't realized that the vat was only half-open and that he was standing on the panel. He tried to jump off it, but it slid open too fast. He managed to grab hold of the edge of the vat; he hung there for a moment, a look of abject terror on his face before he plummeted, shrieking into the seething pit.

Rose turned her head away as O'Neil hit the surface. He bobbed for a second before slipping under. "This is your last warning, really I mean it." said the Doctor dangerously.

"No Doctor, I want you to watch as this world chokes."

"Then I'm sorry, I'm so sorry, but you've left me no choice." The Doctor pulled the small vial of Turvallinen out of his pocket and uncorked it.

"And what is that supposed to be?" asked the Netvor.

"Turvallinen." said the doctor coldly.

"No!" screamed the Netvor. "You wouldn't, Don't!"

"I'm sorry." the Doctor said again. "But, I warned you." He tipped the vial and emptied its contents into the churning pit below. The liquid immediately began emitting copious amounts of smoke and a deafening scream of pain and rage filled the air. The Doctor grabbed Rose's arm and pilled her back to the ladder. They emerged, coughing to find four anxious faces looming over them.

"I thought I told you to leave." said the Doctor smiling.

"Of course we weren't gonna go. We were waiting to see if everything went alright." said John.

"Yeah, another few minutes and we were gonna go in after you." added Paul.

"Of course you were." said the Doctor. "Well, that won't be necessary. It's over now."

"You mean you stopped them?" asked George.

"Well, he said he would, didn't he?" said Rose.

"We'd better get back to the T.A.R.D.I.S in case O'Neil's goons turn up."

The trip back was subdued and when the Doctor reached the T.A.R.D.I.S, he turned to face the boys.

"Does this mean you'll be off now?" asked Ringo.

"Yup, we don't stick around for cleanups, do we?" said the Doctor, looking at Rose.

"Nope." she said, grinning.

"It has been a real pleasure meeting you all, really it has. I couldn't have done it without you." said the Doctor shaking their hands in turn.

"Yeah, thanks you lot." said Rose, hugging them all.

They said their goodbyes and the doctor unlocked the T.A.R.D.I.S and stood aside to let Rose in. The Doctor stopped with one foot on the threshold and turned back."

"Do me a favor, will you?" he asked.

"What?" they asked.

"Try to stay out of trouble."

"We will." said George, Paul and Ringo in unison.

The Doctor looked to John. "Well, I won't," he said. "You know I won't"

The Doctor stepped into the T.A.R.D.I.S laughing. Before he shut the door, he poked his head out still grinning. "Hold on." he said. "You're gonna like this bit."

He disappeared into the T.A.R.D.I.S and seconds later, it began to vanish, making that strange sound gain. The four young men watched with some sadness as the blue box disappeared. When it was gone, they silently turned and walked away without looking back.

FIN