Indy held Marion as she sobbed. Stupid, stupid asshole! If he'd never left her, maybe this could've been kept away from her and Henry. She wasn't the only one crying either. Nancy, the girl who'd lost her brother, was off to the side crying as well.

'It's my fault.' The girl sobbed.

'No, it's not.' The Doctor told her.

'It is.' Nancy insisted tearfully.

'How can it be your…' he trailed off.

Dani looked confused for a moment and then her eyebrows went up in understanding. She nodded to herself. Indy understood in the next moment and Marion must have figured it out because she stopped sobbing and turned her head. She still rested her cheek on Indy's chest. Carlos and Sara were the last ones to understand, with a glance at each other; with no words being spoken.

The Doctor looked over at Jack.

'Captain.' He said.

'Jack!' Rose exclaimed.

Jack seemed to know what they were telling him to do. He held a small device up and teleported out. Then the Doctor returned his focus to Nancy.

'Nancy.' The Doctor said. 'How old are you? Nineteen? Twenty? Older than you look, anyway. How old were you four years ago?'

She looked up at him. He nodded.

'Old enough to give birth.' The Doctor answered his old question. 'He's not your brother, is he?'

She shook her head.

'A teenaged, single mother in 1941.' The Doctor mused. 'So you hid. And you lied. You even lied to him.'

They all looked as the gate was pushed down and Jamie stood there. Dani came on Nancy's other side. She clasped her shoulder.

'Maybe it's time to stop lying.' She suggested softly. 'This sort of thing happens a lot. Just ask Indy and Marion over there.'

Marion let out a single, dry chuckle against his chest and he smiled tightly. Yes. It'd happened to them. Nancy glanced at them and then nodded. She walked over as Jamie approached her. As soon as they were close enough, she knelt down.

'Are you my mummy?' Jamie asked.

'Yes.' Nancy answered.

'Are you my mummy?' Jamie asked again.

'I am your mummy.' Nancy swallowed. 'I will always be your mummy.'

She pulled Jamie into a hug.

'I'm so, so sorry.'

The nanogenes appeared around them. Marion turned around in Indy's arms to watch properly. Rose went up beside the Doctor.

'Doctor, it's changing her.' Rose whispered. 'We've got to…'

'Sh.' he murmured, not taking his eyes off them. 'Come on, come on, you clever little Nanogenes. Figure it out. The mother. She's the mother. That's got to be enough information.'

'What's happening?' Rose asked.

'Look.' He wrapped an arm around her waist and pointed. 'Recognising superior DNA.'

Indy understood, to a point. The cells of one of the people that made up the original converted person would tell the nanogenes that they'd made a mistake. The parent was what humans were supposed to look like.

'Think it's working?' Marion whispered to him.

'Seems to be.' Indy whispered back.

The nanogenes suddenly vanished and Nancy fell back. They all ran over to Nancy and Jamie. The Doctor paused.

'Oh, please.' The Doctor stated. 'Give me a day like this. Give me this one.'

He reached down and pulled the gas mask right off Jamie's face. Dani hollered, not seeming to care who heard her or how stupid she looked, jumping up and punching the air. The Doctor laughed and swung Jamie up.

'Welcome back!' he exclaimed, excitedly. '20 years to pop music. You're gonna love it!'

'What happened?' Nancy laughed in disbelief.

'Recognising superior information.' The Doctor answered. 'The parent DNA. They didn't change you because you changed them.'

He put Jamie down to let Nancy hug him.

'Mother knows best!' the Doctor exclaimed.

'Doctor, that bomb!' Rose exclaimed.

'Taken care of it.' he told her.

'How?'

'Psychology.'

Suddenly the bomb came down, but was stopped in a levitatation beam. And Jack teleported onto it.

'Doctor!' he yelled. 'I've got the bomb in stasis! But it won't last long!'

'Can you get rid of it?' the Doctor yelled.

'Yeah!' Jack yelled back. 'Hey, Rose?'

'Yeah?' Rose yelled up to him.

'Love the shirt!'

And he left. The Doctor stepped forward and looked at his hands.

'What are you doing?' Rose asked.

'Software patch.' The Doctor answered as the billions upon billions of nanogenes gathered around his hands. 'I'm going to e-mail the upgrade.'

'For those present who don't know what that means,' Dani supplied, 'he's going to cure the Gas-Mask Zombies.'

'Everybody lives, Rose.' The Doctor announced, flicking his hands and sending the nanogenes to the altered people. 'Just this once. Everybody lives!'

Indy grinned and let go of Marion as she ran into the restored people, looking for Henry. Dani came and poked him in the ribs.

'I told you he was good.' She laughed.

The Doctor ran over to Dr. Constantine and helped him up.

'Dr. Constantine, who never left his patients.' He stated. 'Back on your feet, constant doctor. The world doesn't want to get by without you just yet. These are your patients. All better now.'

'Yes, yes.' He agreed. 'So it seems. They also seem to be standing around a disused railway station. Is there any particular reason for that?'

'Well, y'know.' The Doctor shrugged. 'Cut-backs. Look, you'll find whatever was wrong with them in the past, they're cured. Don't make a big thing of it. Just tell them what a great doctor you are, okay?'

He ran back towards a strange cylinder of some kind.

'Dr. Constantine.'

Dr. Constantine looked and saw Mrs. Harcourt walking over to him. He saw exactly what the Doctor meant.

'Mrs. Harcourt, how much better you're looking!' he remarked.

'My leg's grown back.' Mrs. Harcourt stated. 'When I come to the hospital, I had one leg.'

That was hard to explain—if he didn't have the Doctor's advice.

'Well, there is a war on.' He stated. 'Is it possible you miscounted?'

'Right, you lot!' the Doctor suddenly yelled to them. 'Lots to do! Beat the Germans! Save the world! Don't forget the welfare state!'

The people started leaving and the Doctor started hitting buttons on the ambulance. Rose looked up at him. She knew exactly how happy he was.

'I'm setting this to explode as soon as everyone's clear.' He told Rose. 'History says there was an explosion here. Who am I to argue with history?'

"Usually the first in line." Rose answered.

The Doctor looked at her and grinned. Rose turned her attention to Indy and Marion and their little boy. Marion had just handed their son to Indy. Indy laughed and swung him up into the air, causing the boy to giggle loudly.

It was a really cute scene and Rose smiled even wider.

Princeton, 1942

Marion smiled contently as she ran her fingers through her husband's hair. He huffed contently and shifted his head slightly so it was right over her heart. She felt his fingers tracing gentle, random patterns on her hip and she kissed the crown of his head.

'Mommy! Daddy! Mommy! Daddy!'

Indy rolled off of her and Marion sat up. A moment later, the door opened and Henry ran in. He jumped on the bed and started jumping up and down.

'It's Christmas! It's Christmas!'