Rose stared at her feet very hard. She wasn't normally all that quick in piecing things together. She never did so well in school and being a shop assistant hadn't taught her much more then how to look like you're working when you're very much not. But years spent with the Doctor cleared her mind, made her quicker then she thought she ever could be. But right now, she wished very hard that she hadn't pieced this puzzle together so quickly.

'I brought it with me.' Rose felt a lone tear roll down her cheek.

Doctor Two looked upon her with pity so intense that Rose could feel it prickle on the back of her neck.

'It's all my fault. If I hadn't…' Rose choked on her words, her throat red raw with sorrowful guilt. 'If I hadn't absorbed the time vortex, if I hadn't looked into the heart of the TARDIS…I wouldn't…I wouldn't have infected myself.'

Doctor Two went to say something, but Rose interrupted him abruptly.

'He said "You have something of the Wolf about you."'

'Who did?' Doctor Two asked, shifting toward Rose with slight trepidation.

'The werewolf. That guy. I brought it with me, this Big Bad Wolf, into this universe that you had already saved. I thought it was a message to get me back to the Doctor. But it's not, is it? It's the end of the universe, and it's my fault.' Rose gave a loud sob before sucking it back and pounding her fist on the floor.

Doctor Two scoffed harder then Rose had ever heard him scoff before. 'Your fault? HA!' He gave her a huge grin, crinkling his red, swollen eyes. 'Don't be ridiculous.' He curled his lips and took a deep breath through his nose. 'Nah, it's nobodies fault, really. Just because you were outsmarted by an omniscient being doesn't make that your fault. You can't help it; only human.' Doctor Two nudged Roses' foot with his own, seemingly in an attempt to example her humanity.

Rose gave him an incredulous look, but couldn't help lending him an earnest grin as she wiped her nose on her sleeve.

'It's clever, you see. Cleverer than most.'

'Cleverer than you, then?' Rose looked to him with wide inquisitive eyes.

'Well…you know…I wouldn't say cleverer, cause that's, well that's impossible.' Doctor Two scratched the back of his head as his nostril raised and his voice grew just a tad bit squeaky. ' But, just, probably, actually, just ahead of me a little, is all.'

Rose chuckled. 'You're completely mad, you are.' She shoved his shoulder, but her smile quickly disappeared off her face as a thought occurred to her. 'But how…how did it survive, Doctor? How could it have made it to the other Universe? How did it get into the other TARDIS?'

'Well…it's a mystery…' Doctor Two paused, looking to the small dirty window as the shimmer of sunshine glinted through like a happy reminder that outside still exists. 'But I like a good mystery, Agatha Christie, Sherlock Holmes, all that. But one thing is for certain, this is a mystery that won't be solved sitting in a daft old hallway.' With that, he got to his feet, stretching out a hand to Rose.

As Rose looked upon the hand, she was reminded of her Doctor. The moment he grabbed her hand and told her to 'Run' when they'd first met. The moment she'd held his hand firm and told him that just them was how she liked it. The moment his outstretched hand clawed for her as she was sucked into the void, if only she could have reached, none of this, not any, would have happened. But here she was, and she couldn't go back, she couldn't change any of it. She took a deep breath and grabbed his hand. Her body felt wobbly as she used all his arm strength to help her up. His hand was warm and she was so grateful for it. Another moment with the Doctor. Quite suddenly and unexpectedly, she felt closer to him than ever before.

They stepped outside into a morning fresh fog. The sun, unusually bright, poked through pockets of cloud in the sky. As the fog dispersed and the day set in, they walked steadfast toward the tower, clinging to each others hands the entire way. As they approached it once again, Rose could almost see what Doctor Two meant by 'beautiful' when she gazed upon all its intricacies and baffling workmanship shining richly under the sun.

'Well.' Doctor Two said abruptly while rubbing his hands together, 'we have a day to make sure this thing works perfectly.'

Rose was caught off guard. 'I…don't understand.' She had all but forgotten about the purpose of the construction before them; let alone what was happening tomorrow.

Doctor Two turned to her, grabbing both Roses shoulders and looking at her square in the eyes.

Rose melted slightly under his grip.

'We need to know more about what is going on, not just in this universe, but in your one.' Doctor Two paused momentarily before adding, 'your old one.'

Rose gave him a weak smile.

'Our only chance is to get you to the other side, get you to your Doctor.'

Rose felt a little stumped. She knew what he meant, that they needed to know more to save both Universes, but she was also punished with a menacing question. 'What if that's exactly what they want?'

Doctor Two let go of her arms and ran his hands through his hair. 'Yes…well…'

'I mean, somehow, conveniently, as these wolves were sent through the rift, so too was a way for me to get back home. A way for me to find the Doctor. And I mean, on the same night it happens, I bump into you?' Rose's thoughts were all fusing together as she was saying them. She turned away from Doctor Two, pacing up and down the pavement, turning thoughts in her mind. 'It's like before, Bad Wolf, it all lead up to a moment, it brought me to that moment, and I thought I made it happen, but it wasn't me at all. It's a bit like…it's a bit like fate. But this time it's not leading to saving the universe, it's leading to its destruction. Everything so far has told me to go back, told me to go back and find my Doctor. But what if, what if that's exactly what will make the universe end?'

At that moment Rose thought she had hit the nail on the head, but as she turned to Doctor Two to gauge his reaction, she was shocked by his sudden absence.

'WHAT WERE YOU SAYING!?'

Rose looked up to the top of the tower. Doctor Two was hanging off the side like a monkey swinging on the branches of the tower. After shouting down to her, he put his sonic screwdriver between his teeth and climbed further up.

'HOW DID YOU GET UP THERE SO QUICKLY!?' Rose shouted between cupped hands.

'WHAT!?' Doctor Two shouted back.

'HOW DID YOU…oh never mind,' Rose sighed to herself, clamped her fists by her side and marched to the tower. As she climbed the ladders and winding stairs to the top, she grumbled to herself.

'I come up with an idea…a good idea…a bloody revelation…and he bloody…he dismisses it… "you're only human…what could you know?"…that's what he's thinking...Time Lord chauvinistic bast…Oh hi!' Rose gave his a very wide, very fake smile. 'Made it up here alright, then?'

'Oh yes!' Doctor Two had a jaunty glee in his voice. 'When you were jabbering on…'

'Jabbering on! I was not…'

'I…'Doctor Two emphasized the 'I' to shut her up. 'I had an epiphany.'

'Rose crossed her arms and looked away. 'Oh yeah?'

'Yeah.' Doctor Two gave her a charming smile and proceeded to tinker with a few circuitry plates in the frame.

Rose turned away, fuming inside as she climbed down the ladder by her feet.

'Wait!' Doctor Two called out to her, only just noticing her retreat.

Rose paused. She looked up at him, not saying a word.

'It's true…it is what they…it…wants.' Rose cocked her eyebrow at him. 'But there's nothing else we can do.' Doctor Two looked very dark in the grated shadows of the tower.

'I…yeah, ok, whatever.' Rose looked down. She didn't look up again until she reached the bottom of the tower. She thought of nothing as she journeyed home except getting to a shower and her bed. But as she finally rested her head on her pillow it was all she could do to shut her eyes. Her mind raced in terror at the thought of seeing the Doctor tomorrow. It didn't feel right anymore. In fact, it felt like the complete opposite of what she should be doing. For the first time she wished that the tower wouldn't work. She shut her eyes hard, clenched her fists and wished that she could never return home again.