The Familiar noise of the Tardis fills the air and he watches it materialize and then to his utter amazement sees himself run out holding a gun.

"Don't," He yells catching on quickly to the plan. He watches Davros zap the second Doctor and the Doctor drops the gun in pain.

"Activate holding cell."

Donna next runs out of the Tardis and grabs the gun. " Doctor! I've got it. But I don't know what to do!" He watches in horror as Davros zaps Donna and sends her flying backwards and once again the gun falls to the floor. As much as he wants to see Kiam and make sure he is okay, he just hopes they had enough sense to confine him before starting with their plan.

"Donna! Donna! Are you all right, Donna?" He screams for his best friend.

The weapon is destroyed and Davros tells him "I was wrong about your warriors, Doctor. They are pathetic."

"How comes there are two of you?" Rose asks him.

"Human biological metacrisis." He says as he realizes the truth. "Never mind that. Now we've got no way of stopping the Reality Bomb."

"Stand witness, Time Lord. Stand witness, humans. Your strategies have failed, your weapons are useless, and. Oh. The end of the universe has come." Davros gloats again.

"Mmm, closing all Z-neutrino relay loops using an internalised synchronous back-feed reversal loop." He looks towards Donna's voice. Not believing what he is hearing as she stops the reality bomb. "That button there." She press a button on the panel.

"Donna, you can't even change a plug." He says in amazement.

"Do you want to bet, Time Boy?" She says and hits a lever and stops Davros. He watches in amazement as she sends cancels out there weapons.

"How did you work that out? You're..."

"Time Lord. Part Time Lord." The Metacrisis says.

"Part human. Oh, yes. That was a two-way biological metacrisis. Half Doctor, half Donna." She gloats.

"The Doctor Donna. Just like the Ood said, remember? They saw it coming. The Doctor Donna." He says in amazement.

"Holding cells deactivated. And seal the Vault. Well, don't just stand there, you skinny boys in suits. Get to work." He watches the Metacrises run straight to the controls. He runs to the Tardis first and peeks inside, breathing a sigh of relief to see Kiam standing in his playpen waiting for them. He goes back to the controls to help the others.

"Stop them! Get them away from the controls."

"And spin." She says. she plays with the Daleks controls.

Together they start sending the planets back to there rightful places.

"We need more power!" He says.

"Is anyone going to tell us what's going on?" Rose ask.

"He poured all his regeneration energy into his spare hand. I touched the hand, and he grew out of that but that fed back into me. But, it just stayed dormant in my head till the synapses got that little extra spark, kicking them into life. Thank you, Davros! Part human, part Time Lord. And I got the best bit of the Doctor. I got his mind."

"So there's three of you?" Sarah Jane says in amazement.

"Three Doctors?" Rose says.

"I can't tell you what I'm thinking right now." Jack eyes him.

"You're so unique the timelines were converging on you. Human being with a Time Lord brain." He stares at Donna in amazement.

"But you promised me, Dalek Caan. Why did you not foresee this?" Davros yells.

"Oh, I think he did. Something's been manipulating the timelines for ages, getting Donna Noble to the right place at the right time."

"This would always have happened. I only helped, Doctor." Caan says.

"You betrayed the Daleks." Davros screams at him.

"I saw the Daleks. What we have done, throughout time and space, I saw the truth of us, Creator, and I decreed, no more!" Caan laughs with glee.

"Heads up!" Jack yells as the Red Dalek enters the Vault.

"Davros, you have betrayed us." The Dalek says. The Vault will be purged. You will all be exterminated." He zaps the control panel.

Jack fires an extended pulse from his big gun and the Dalek explodes.

"Oh, we've lost the magnetron. And there's only one planet left. Oh, guess which one." Of course. "But we can use the Tardis."

He runs into the Tardis and heads the playpen first wanting to hold Kiam, he heads to the control panel. Getting to work he hears explosions and rushes out of the Tardis again.

"What have you done?"

"Fulfilling the prophecy." The Metacrisis answers.

"Do you know what you've done? Now get in the Tardis! Everyone! All of you, inside! Run!" He herds them all inside and hears the Metacrisis naming them as they enter.

But there is one last person who is not moving. "Davros? Come with me. I promise I can save you."

"Never forget, Doctor, you did this. I name you. Forever, you are the Destroyer of the Worlds!" Flames leap up and he heads back into the Tardis and pulls the lever to get it off of the crucible, as the crucible explodes.

"But what about the Earth? It's stuck in the wrong part of space." Sarah asks him.

"I'm on it." He pulls the screen around. "Torchwood Hub, this is the Doctor. Are you receiving me?"

"Loud and clear." A female answers. "Is Jack there?" She ask.

"Can't get rid of him." He turns to Jack, "what's her name?"

"Gwen Cooper." Jack responds.

"Now, Torchwood, I want you to open up that Rift Manipulator. Send all the power to me."

"Doing it now, sir." Ianto responds.

"What's that for?" Donna ask him.

"It's a tow rope. Now then. Sarah, what was your son's name?"

"Luke. He's called Luke. And the computer's called Mister Smith." She says happily.

"Calling Luke and Mister Smith. This is the Doctor. Come on, Luke. Shake a leg."

"Is Mum there?" Luke responds.

Using K-9 to give the computer the codes, he has Mr. Smith loop the rift power around the Tardis to pull the earth home.

"Now then, you lot." He walks around the console positioning them at various places" Do you know why this Tardis always is always rattling about the place? It's designed to have six pilots, and I have to do it single handed. Now we can fly this thing." He pauses seeing Jackie. "No, Jackie. Not you. Don't touch anything. Just stand back." She looks at him insulted but he finishes his thought "Like it's meant to be flown. We've got the Torchwood Rift looped around the Tardis by Mister Smith, and we're going to fly Planet Earth back home. Right then. Off we go." He reaches the main position again and pulls the lever.

They tow the Earth back home and release it. He takes the Tardis and parks it in a small park in London. He sets Kiam down and heads outside with Sarah.

"You know, you act like such a lonely man. But look at you. You've got the biggest family on Earth." She hugs him before rushing off. "Oh! Got to go. He's only fourteen. It's a long story. And thank you!"

Jack steps off next with Martha. He grabs Jack's arm and sonics his bracelet again. "I told you, no teleport. And, Martha, get rid of that Osterhagen thing, eh? Save the world one more time."

"Consider it done." She says.

They both salute the Doctor, and he returns it watching them walk away. Mickey starts to head past him.

"Oi, where are you going?"

"Well, I'm not stupid. I can work out what happens next. And hey, I had a good time in that parallel world, but my gran passed away. Nice and peaceful. She spent her last years living in a mansion. There's nothing there for me now, certainly not Rose."

"What will you do?" he asks him.

"Anything. Brand new life. Just you watch. See you, boss. Hey, you two!"

"Just time for one last trip. DÃ¥rlig Ulv Stranden."

He lets the Metacrisis and Donna take them there as he sits on the floor of the Tardis with Kiam and Rose.

"I can't believe how big he has gotten." She says again in amazement at her son. She looks at him. "I've missed you so much."

"Me too." He puts his arm around her and pulls her close just wanting to hold her. She puts her head on his shoulder and they sit there until the Tardis lands.

He watches the Metacrisis and Jackie step of the Tardis first and then steps out with Rose and Donna. Holding Kiam's hand. He releases it as they step onto the beach, letting him play in the sand.

"Hold on, this is the parallel universe, right?" Rose says.

"You're back home." He tells her.

"And the walls of the world are closing again, now that the Reality Bomb never happened. It's dimensional retroclosure. See, I really get that stuff now." Donna says happily.

"No, but I spent all that time trying to find you. I'm not going back now." Rose tells him.

"But you've got to. Because we saved the universe, but at a cost. And the cost is him. He destroyed the Daleks. He committed genocide. He's too dangerous to be left on his own."

"You made me." The second Doctor says.

"Exactly. You were born in battle, full of blood and anger and revenge. Remind you of someone? That's me, when we first met. And you made me better. Now you can do the same for him." He stands on one side of her and the Metacrisis stands on the other.

"But he's not you." Rose says.

"He needs you. That's very me." He says to Rose.

"But it's better than that, though. Don't you see what he's trying to give you? Tell her. Go on." Donna says.

"I look like him and I think like him. Same memories, same thoughts, same everything. Except I've only got one heart." The Second Doctor says.

"Which means?

"I'm part human. Specifically, the aging part. I'll grow old and never regenerate. I've only got one life, Rose Tyler. I could spend it with you, if you want."

"You'll grow old at the same time as me?" Rose says.

"Together." He tells her.

The Tardis engine starts making noise. "We've got to go. This reality is sealing itself off for ever."

"But, it's still not right, because the Doctor's still you." Rose says looking at him.

"And I'm him." He gestures at the Second Doctor trying desperately to make her see.

"All right. Both of you, answer me this. When I last stood on this beach, on the worst day of my life, what was the last thing you said to me? Go on, say it." Rose says looking at him.

"I said, Rose Tyler." He tells her.

"Yeah, and how was that sentence going to end?"

"Does it need saying?" He says not wanting to say the words.

"And you, Doctor? What was the end of that sentence?" He watches the Metacrisis lean over and whisper in her ear. She grabs him and pulls him into a kiss.

He turns and heads to the Tardis and letting Donna get on first he closes the door, leaving Kiam outside with the rest. He had come to the decision as he sat there with Rose. He thought for the third time in his son's short life that he had killed him. He couldn't keep doing it, he had to make sure Kiam was safe. He saw Donna look at him confused as she realized the little boy was not on board with them.

Not daring to speak he walks over to the console and starts setting the switches to head back to their reality. From the door he hears crying and the pounding of a little hand. "Da da," Kiam's first words come through the door. Tears stream down his face and his hearts shatter.

Right as he is about to hit the lever to take them home, Donna opens the door a crack and pulls the child inside. Closing it tightly behind him. He hits the lever and falls to his knees, as the little boy runs to him. He gathers him in his arms apologizing.