"My name is Leila Pond. When I was 7, I had an imaginary friend. And my imaginary friend came back."

Leila was floating in space, with The Doctor hold on to her ankle from the open door of the TARDIS. Amy was inside, smiling at them. She was happy to see them like that. "Come on, Pond," The Doctor said with a smile. He pulled Leila back inside the TARDIS. "Now do you believe me?" The Doctor asked. "Okay, your box is a spaceship. It's really, really a spaceship. We are in space!" Leila said with a smile as Amy walked over to the pair. Amy smiled. "What are we breathing?" She asked. "I've extended the air shell. We're fine," The Doctor replied.

They were above a city in space. "Now that's interesting. Twenty ninth century. Solar flares roast the earth, and the entire human race packs its bags and moves out till the weather improves. Whole nations," The Doctor said. He ran back to the console and the doors closed. "Doctor?" Leila called. "Migrating to the stars," The Doctor said. "Doctor?" Amy called. "Isn't that amazing?" The Doctor asked with a smile. "Doctor!" Leila and Amy called. The Doctor stopped and walked to the doors. He see Leila and Amy holding on the TARDIS.

"A little help here?" Leila asked. The Doctor chuckled, and pulled them both down and shut the doors. "I've found us a spaceship. This is the United Kingdom of Britain and Northern Ireland. All of it, bolted together and floating in the sky. Starship UK. It's Britain, but metal. That's not just a ship, that's an idea. That's a whole country, living and laughing and shopping. Searching the stars for a new home," The Doctor said.

"Can we go out and see?" Amy asked. "Course we can. But first, there's a thing," The Doctor said. "A thing?" Leila asked. "An important thing. In fact, Thing One. We are observers only. That's the one rule I've always stuck to in all my travels. I never get involved in the affairs of other peoples or planets," The Doctor said, grinning at Leila and Amy.

"Ooo, that's interesting," The Doctor said, looking back at the screen. There was a small girl crying on a bench, silently sobbing into her own chest. Leila and Amy looked at the girl sadly. "What's wrong with her?" Amy asked. They both see The Doctor on the scanner, speaking to the weeping girl. "Doctor?" Leila asked. The little girl ran away. The Doctor gestured for Leila and Amy to join him and they both ran out the TARDIS.

"We in the future. Like hundreds of years in the future. We been dead for centuries," Amy said. "Oh, lovely. You're a cheery one. Never mind dead, look at this place. Isn't it wrong?" The Doctor said as he put his arms around Leila and Amy shoulders. "What's wrong?" Leila asked. "What's wrong with this picture?" The Doctor asked. "Is it the bicycles? Bit unusual on a spaceship, bicycles," Amy said. "Says the girl in the nightie," Leila said and The Doctor chuckled. The realisation hit Amy, her face dropped. "Oh my God, I'm in my nightie," She said. Leila smirked. "Why are you not in a Pj's?" Amy asked. "I was out," Leila said.

"Look around you. Actually look. Life on a giant starship. Back to basics. Bicycles, washing lines, wind-up street lamps. But look closer. Secrets and shadows, lives led in fear. Society bent out of shape, on the brink of collapse. A police state. Excuse me," The Doctor said. He took a pint glass of water from a table. "What are you doing?" The man asked. The Doctor put the glass on the floor. He looked at it for a moment then returns it to the table. "Sorry. Checking all the water in this area. There's an escaped fish," The Doctor said and turned back at Leila and Amy. "Where was I?" The Doctor asked as he stopped closer next to Leila. "Why did you just do that with the water?" Leila asked.

"Don't know. I think a lot. It's hard to keep track. Now, police state. Do you two see it yet?" The Doctor asked. "Where?" Amy asked. "There," The Doctor said, pointing at the crying little girl, who was all alone. The Doctor walked over to her, Leila and Amy followed.

The Doctor, Leila and Amy set on a bench in front of the child. "One little girl crying. So?" Amy asked. "Crying silently. I mean, children cry because they want attention, because they're hurt or afraid. But when they cry silently, it's because they just can't stop. Any parent knows that. Hundreds of parents walking past who spot her and not one of them's asking her what's wrong, which means they already know, and it's something they don't talk about. Secrets. They're not helping her, so it's something they're afraid of. Shadows, whatever they're afraid of, it's nowhere to be seen, which means it's everywhere. Police state," The Doctor said.

The little girl walked away. "Where'd she go?" Amy asked. "Deck two oh seven. Apple Sesame block, dwelling 54A. You're looking for Mandy Tanner," The Doctor said. Leila and Amy looked at him. "Oh, er, this fell out of her pocket when I accidentally bumped into her," The Doctor said and handed a colourful wallet to Leila.

"Took me four goes. You two ask her about those things. The smiling fellows in the booths. They're everywhere," The Doctor said. "But they're just things," Amy said. "They're clean. Everything else here is all battered and filthy," Leila said and The Doctor nodded. "That's right. Look at this place. But no one's laid a finger on those booths. Not a footprint within two feet of them. Ask Mandy, why are people scared of the things in the booths?" The Doctor said.

"Wait. What do we do? We don't know what we doing here and Amy not even dressed," Leila said. "It's this or Leadworth. What do you two think? Let's see. What will Leila and Amy Pond choose?" The Doctor asked. Leila and Amy remained silent. "Ha ha, gotcha. You two meet me back here in half an hour," The Doctor said. "What are you going to do?" Leila asked. "What I always do. Stay out of trouble. Badly," The Doctor said, and he ran off. Leila sighed. "Come on we better go and find her," Amy said. They got up and went to find the girl.