Disclaimer: I do not own Harry Potter or Doctor Who

"Mum!" Harry cried, as the dimensional hopper carried him away. The next thing he knew he was standing in the middle of a dark room, in what looked like the Torchwood building.

Along with being poorly lit, the room also looked like it had been ransacked; desks were flipped over and papers scattered all over the place. Despite the room's condition there was nothing to make Harry believe he successfully crossed dimensions. Then he noticed a window, where he saw the sky was filled with blimps.

Ok so I am in another dimension Harry acknowledged, gawking at the sea of airships.

"Harry?"

The boy turned to see the Doctor standing there with a group of soldiers and a man that Harry had only seen pictures of, his grandfather, Pete Tyler.

"Dad!" Harry cheered, running over to give the Doctor a hug. "We got to get back, mum and uncle Mickey are in trouble."

"His mother's Rose, isn't it?" asked Pete.

"Yes" said the Doctor. "This our son, Harry. And the longer you keep me here, the more danger you're putting Rose and Jackie in."

"I'm not that man, Doctor."

"Maybe you're right. The Pete Tyler, I met was willing to die for his daughter."

The Doctor's words didn't seem to have any effect on the man, instead he went on to explain what had happened since the last time the Time Lord and Rose had made contact with that dimension. That dimension had once been under the control of the Cybermen until the Doctor had arrived and since then they sealed them inside their own factories.

But the Cybermen had made plans. They infiltrated that dimension's version of Torchwood and used their technology to map themselves onto their world.

"When was this?" the Doctor asked.

"Three years ago."

"It's taken them three years to cross the void, but we can pop to and fro in a second."

"It must be the mass of five million Cybermen crossing all at once" said Harry.

"Exactly what I was thinking" the Doctor agreed.

"Yeah, Mickey said you'd rattle off that sort of stuff" said Pete. "Now I must ask you, Doctor, will you help us?"

"What, close the breach? Stop the Cybermen? Defeat the Daleks? Do you believe I can do that?"

"Yes!" Harry spoke up, before Peter could. "You're the Doctor, you can do anything."

"Maybe that's all I need" the Doctor smiled at Harry. "Off we go, then!"

"You know, Harry's going to steaming when he gets back" said Mickey.

"Well better mad than dead" said Rose.

The two humans watched as the Daleks focused on the Genesis Ark, announcing that it was ready for the final stage of its awakening.

"Your handprint will open the Ark" said the black Dalek, turning to Rose.

"Well tough, because I'm not doing it" she said, standing firm.

"Obey or the male will die" it threatened, aiming its gun at Mickey.

"Right you could do that, but if you do you'll never know what happened after you escaped the Time War" said Rose. "Don't you want to know what happened – what happened to the Emperor?"

"The Emperor survived?"

"Till he met me. Because if these are going to be my last words, then you're going to listen. I met the Emperor, and I took the Time Vortex and I pulled it into his head and turned him into dust. Do you get that? The God of all Daleks, and I destroyed him. Ha!"

"YOU WILL BE EXTERMINATED!"

"Oh now, hold on, wait a minute" said the Doctor, wearing his 3D glasses as he walked into the lab.

"Alert, alert. You are the Doctor" the Black Dalek cried.

"Sensors report he is unarmed" said another Dalek.

"That's me. Always" the Doctor grinned.

"Then you are powerless" said the Black Dalek.

"Not me. Never" said the Time Lord, taking off his glasses, moving to stand by Rose, placing a comforting hand on her shoulder. "How are you?"

"Oh, same old, you know" said Rose. "Had to send, Harry away to another dimension."

"Don't worry, I got him, he's safe" said the Doctor, now taking note of Mickey's presence. "And Mickity McMickey. Nice to see you!"

"And you, boss" Mickey grinned, bumping fists with the Doctor.

"Social interaction will cease!" ordered one of the Daleks.

"How did you survive the Time War?" the Black Dalek demanded.

"By fighting. On the front line" said the Doctor, unleashing the Oncoming Storm. "I was there at the fall of Arcadia. Someday I might even come to terms with that. But you lot ran away!"

"We had to survive" the Dalek Leader justified.

"The last four Daleks in existence" said the Time Lord, eyeing the four. "So what's so special about you?"

"Doctor, they've got names" said Rose. "Daleks don't have names, do they? One of them said Thay.

The Daleks then identified themselves as Thay, Jast, Caan, and the black Dalek, their leader was Sek.

"So that's it!" the Doctor exclaimed. "At last. The Cult of Skaro. I thought you were just a legend."

"Who are they?" Rose asked.

"A secret order above and beyond the Emperor himself. Their job was to imagine, think as the enemy thinks. Even dared to have names. All to find new ways of killing."

"But that thing, they said it was yours" said Mickey, pointing to the Ark. "I mean, Time Lords. They built it. What does it do?"

"I don't know" the Doctor said honestly. "Never seen it before.

"But it's Time Lord" Rose said lamely.

"Both sides had their secrets" he said, then turned back to the Daleks. "What is it? What have you done?"

"Time Lord science will restore Dalek supremacy" said Sek.

"What does that mean?" the Doctor pressed. "What sort of Time Lord science? What do you mean?"

"They said one touch from a time traveler will wake it up" said Rose.

"Technology using the one thing a Dalek can't do. Touch" the Doctor leaned into Sek, mockingly. "Sealed inside your casing. Not feeling anything ever, from birth to death, locked inside a cold metal cage. Completely alone. That explains your voice. No wonder you scream."

"THE DOCTOR WILL OPEN THE ARK!"

"The Doctor will not" the Time Lord mocked, laughing scornfully as he strolled away from the Dalek.

"You have no way of resisting."

"Well…you got me there" the Doctor said thoughtfully, as he pulled out his sonic screwdriver. "Although…there's always this."

"A sonic probe?" Sek questioned.

"That's screwdriver" the Time Lord corrected.

"It is harmless."

"Oh, yes. Harmless is just the word. That's why I like it. Doesn't kill, doesn't wound, doesn't maim. But I'll tell you what it does do. It is very good at opening doors."

The Doctor used his sonic to open the lab doors. All hell broke loose as Jake and his team, alongside a group of Cybermen, swarmed inside, attacking the Daleks with everything they had.

"Rose, get out!" the Doctor shouted, pushing her towards the door. Rose stumbled, only to be pulled up again by Pete. They exchanged a brief glance before bolting out the door, the others following close behind.

Once outside, Rose grew furious as she spotted Harry standing by the doors, sealing them shut with his sonic, as the last of their group made it out.

"What are you doing here!" she snapped, behind her the Doctor wore the same anger mixed with worry expression. "You were supposed to stay safe until I got you."

"Pete, said I could come" said Harry. He just couldn't bring himself to consider the man his grandfather, mostly because he didn't like how the man didn't care about putting their dimension in harm's way as long as his world was safe.

"Right, Jake, check the stairwell," said the Doctor, deciding there was no helping it now. "The rest of you, come on!"

As they took off running, Mickey confessed that during the escape he had accidentally fallen and touched the Genesis Ark.

"I just fell. I didn't mean it!" he yelled.

"Mickey, without us, they'd have opened it by force. To do that, they'd have blown up the sun" the Doctor explained. "You've done us a favor. Now, run!"

They rounded a corner to see two Cybermen advancing on a frightened Jackie.

"Gran!" Harry cried, whipping out his sonic wand using it to shove the Cybermen against the far wall. But they were proving to be difficult to hold down as they used their cybernetically enhanced strength to fight against Harry's magic.

Seeing the boy's struggle, Pete quickly brought up his gun and blasted the Cybermen, leaving them dead on the floor. Jackie turned around with a smile, recognizing Harry's display of magic but when she saw who he was with she gasped.

"Pete?"

"Hello, Jacks" Pete said roughly.

"I said there were ghosts, but that's not fair" Jackie moaned. "Why him?"

"I'm not a ghost."

"But you're dead. You died twenty years ago, Pete."

"It's Pete from a different universe" the Doctor explained. "There are parallel worlds, Jackie. Every single decision we make creates a parallel existence, a different dimension where…."

"Oh, you can shut up" she snapped, and for once the Doctor did. But Jackie was still focused only on Pete. "Oh, you look old."

"You don't" Pete smiled.

"How can you be standing there?" Jackie asked.

Pete just shrugged.

"I just got lucky. Lived my life. You were left on your own. You didn't marry again, or…"

"There was never anyone else." Rose and the Doctor shared a look as they watched the heartfelt (sort of) reunion. "Twenty years, though. Look at me. I never left that flat. Did nothing with myself."

"You brought her up" said Pete. "Rose Tyler. That's not bad."

"Yeah" Jackie agreed.

"In my world, it worked. All those daft little plans of mine. They worked. Made me rich."

"I don't care about that…how rich?"

Harry couldn't help but laugh as he found his grandmother's behavior funny. Rose quickly told her son to shush as this was a very serious moment.

"Very" Pete smiled.

"I don't care about that" said Jackie. "How very?"

Rose rolled her eyes and this time didn't fault Harry as he laughed. Pete found it funny too as he let out the first real laugh he'd had in a long time.

"Thing is though, Jacks, you're not my wife. I'm sorry, but you're not. I mean, we both. You know, it's just sort of. Oh, come here."

Harry made a face as Jackie and Pete embraced, sharing a passionate kiss.

"Hey, we have to stop the Daleks and the Cybermen!" he shouted, bringing an end to the scene.

"Little Man's right" said Mickey. "We got to do something, Boss."

"Right, well we better get moving" said the Doctor.

It was open war between the Cybermen and the Daleks as the Doctor and the others raced through the Torchwood facility.

"Dad, look!" Harry cried, pointing out a window where they could see the Daleks levitating outside carrying the Genesis Ark as they moved above the building. "What're they doing?"

"Time Lord science" the Doctor muttered. What Time Lord science? What is it? "We've got to go back up. Come on! All of you. top floor!"

"That's forty-five floors up" Jackie complained. "Believe me, I've done them all."

"We could always take the lift" said Jake, popping his head out, to their delight.

Making their way to the rift chamber they watched from the windows as the Daleks stopped their ascent. The Genesis Ark suddenly started to spin and the Doctor's eyes widened in horror as Daleks stared shooting out.

"Time Lord science" he muttered. "Bigger on the inside."

"Why would the Time Lords put the Daleks in there?" Harry asked.

"Because it's a prison ship" the Doctor explained.

"How many Daleks could fit in there?" Mickey asked.

"Millions."

The Doctor put on his 3D glasses and watched silently as the Daleks began attacking not only the Cybermen but the human inhabitants of the city as well. Once Canary Warf fell the rest of the world would be sure to fall with it. He already knew what he had to do, but that didn't mean he had to like it.

In the back of his mind the Doctor noted that Pete was talking to Jackie about going back to his world, they'd be safe from the Cybermen and the Daleks. The very same plan he was thinking for Rose and Harry. A part of him had always known this couldn't last, the little family he'd made for himself, and the happiness they brought him. Not after all he'd done, the universe had decided he hadn't suffered enough. Now he had to make a choice either break his hearts by sending them away forever or risk watching them die because he couldn't protect them.

It was nice while it lasted.

AN:I'll be taking down the poll so as to leave the results a surprise for the next chapter. Thanks for reading.