So, I was watching School Reunion the other day, and the possibility of this what if came to me. What if the Doctor had taken the chance to use the Skasis Paradigm, how would it affect him? So this is my take on it, hope you like.

The Doctor stared at the emerald cube twisting and turning on the screen. He could save everyone. Stop the war, no more would have to die…he looked to Rose and Sarah Jane, both were looking to him, eyes large and afraid. The lights flickered before his own eyes, and he thought of all the loss he had endured, and the prospect of never having to feel that pain again. Rose and Sarah Jane, he couldn't bare the thought of them dying…any of the people he loved…they didn't have to die. Not if he could help it.

"I could save everyone." He whispered, almost hypnotized by the prospect. Finch smiled and nodded encouragingly. Rose looked from one man to the other, her heart thudding. She had never seen the Doctor so entranced by something like this before. Sarah Jane clasped Rose's hand in hers, both of them sharing a glance.

"I could stop the war." The Doctor added. Finch's grin widened, and Sarah Jane opened her mouth, as if to say something. Rose watched her close it and shake her head, tightening the grip on her hand.

"What do you say, Doctor?" The man in question tore his eyes away from the screen, finally meeting Finch's eyes.

"Will you save everyone? Or let the world keep dying?" His brow furrowed, the Doctor looked back to the paradigm with parted lips.

"I…" Rose swallowed hard, trying to clear her dry throat.

"Doctor?" She whispered, scared by his lack of coherence. He looked at her, and took in the familiarity of her and Sarah Jane. Rose was young now, just like Sarah. But he could see in his mind what exactly would become of her. If he didn't end up killing her through one of his careless adventures, she would wither and die. So would Sarah. But he could save them both.

"Doctor, you need to think about this." Sarah said as firmly as her shaking voice would allow.

"Could you control that power? You always said that too much power would make you vengeful. Would you know where to stop?"

"But you could stop him, Sarah." Finch interrupted, and the Doctor switched his gaze to him.

"You could stay by his side, forever. Helping him, advising him, his loyal friend." Sarah lowered her gaze to the floor, avoiding Finch's eye.

"And you, Rose? You love him, do you not? You could give him the forever you promised. Making sure he was never lonely. Loving him forever." Rose flushed furiously, glaring at Finch.

"Rose...Sarah? What do you think?" The Doctor asked them hoarsely. The women looked to eachother, and Sarah Jane shook her head.

"I don't think it's a good idea-"

"But you don't understand, Sarah. He could save everyone. What about you, Rose? Does it not sound like an ideal world?" Rose frowned, confused at what to think.

"Yes, but....I don't know." She shook her head, looking to Sarah for help.

"Doctor, this would be your world. Your turn to save everyone. Bring back your own people. Wouldn't it be nice to feel them in your head again? To be able to live amongst them? With your companions?" The Doctor's head reeled at the possibility.

"Doctor?" Finch took a step towards him, hand outstretched. The Doctor looked down at it, regarding it as if it had the ability to burn him. Seemingly of it's own accord, his own hand reached out, just stopping short of Finch's fingers.

"And I would have control over it?" He said, still looking at the jade screen. Finch's brow twitched.

"Well, a substantial amount of power and control. Of course I would share some of it. But you could do what you wished-"

"And you wouldn't hurt anyone?" Finch regarded him for a moment.

"If I had the building blocks to the universe, Doctor…why would I need to invade petty civilizations?"

"Give me your word." The Doctor said firmly, looking Finch dead in the eyes.

"I give you my word." With one last look to the two women in the corner, the Doctor closed the distance between Finch's outstretched hand, gripping it firmly.

"O.k."

Rose and Sarah Jane sat in the TARDIS, both silent and still. Finch had led the Doctor away somewhere, no doubt getting started on solving the paradigm. Mickey had wandered off back to his flat, claiming the need for a rest. A strong sense of dread filled Sarah Jane's stomach, swirling around her midriff.

"Oh God." Rose buried her head in her hands, wondering what the Doctor could possibly be doing. The wait for him was driving her mad.

"I can't believe he agreed." Sarah Jane said more to herself than to Rose. Rose looked up, quietly contemplating.

"But....it is what he's always wanted. To save everyone." Sarah shook her head and paced the TARDIS.

"Not like this. He's making a mistake." She whispered, and Rose turned tiredly to look at her.

"Is he?" She whispered back, and Sarah frowned at her.

"Yes! This is not the way it's supposed to be-"

"But he could save everyone. Stop it all. His own people! Sarah, do you understand how much he misses them? He could have them back." Rose ran a hand over the wall of the TARDIS, trying to seek some comfort from the warmth of it. Sarah Jane sighed at her.

"I wouldn't expect you to understand, Rose. You're young and naïve. But believe me, if you had the experience that I had, then you would understand, that everything needs to die-"

"But it wouldn't anymore! I mean…he could change it. He's the Doctor, he could fix it all." Rose insisted, and Sarah shook her head at the young girl before her.

"Just because he is the Doctor, Rose, it does not mean that he has the ability to play God. Even he makes mistakes. Foolish mistakes. And when he makes those mistakes, sometimes he can't fix it. Sometimes someone dies. And with the power of the universe in his hands, can you imagine the repercussions that one mistake would make!?" Her voice rang through the TARDIS, and Rose avoided her gaze, chewing her thumbnail.

"I have faith in him." She murmured. Sarah sighed and sat on the battered sofa beside Rose.

"We all have faith in him. But just because we have faith in him, does not mean that he won't make that mistake. I should have said something more. I can't believe I didn't say anything more." She muttered the last part to herself, burying her face in her hands. Rose said nothing, just wrapped an arm around Sarah Jane's shoulders and took comfort from her presence.

"Maybe he can make this work, Sarah. Maybe it....maybe it will be an ideal world."

"Maybe...but what if what he says is right? What if the power gets to him? What if he becomes vengeful? What if it turns him into something else?" Sarah whispered despairingly.

"It....it won't." Rose murmured softly, trying to convince as well as Sarah.

Hours later, the Doctor re-entered the TARDIS, a glazed look on his face. Sarah Jane had left to get some much needed sleep, leaving Rose alone in the console room, where she had also nodded off.. The Doctor had the ghost of a smile on his face as he saw her curled up on the threadbare sofa. Her jacket as a makeshift pillow. He watched her chest rise and fall with the soft breaths she took. Her skin practically glowed with youthful energy, her smooth face unscathed by the lines and marks of old age. He could let her stay like this, she could be young forever. With him. As he took a step forwards, the sound of his footsteps woke her. She stretched her arms as she blearily opened her eyes. As Rose spotted the Doctor, she stood quickly.

"Doctor. We need to talk about this."

"About what?" He said as he threw off his coat. Rose's brow furrowed as she wrapped her arms around her middle.

"This whole…skasis paradigm thing. Is it a good idea?" She breathed. The Doctor smiled at her, nodding.

"I think…I think it could be wonderful."

"I have faith in you, Doctor. I really do. And I believe that you could really make something of this. But Sarah Jane was talking…and she has a point. What if the power gets to you? What if you make a mistake?" The Doctor licked his lips and reached out to her. She complied and rushed forwards into his embrace.

"Well...You'll be there to stop me, won't you?" He gently asked, and Rose nodded into his neck.

"I just hope you know what you're doing, Doctor." He didn't speak, just tightened his grip on her.

Hope you liked. Should be updating by wednesday next week. So...tell me what you thought! xx