They ran along a short corridor and into. "Doctor!" Katherine said. The Doctor dodged inside at the last second, as the door closes, and ran to the controls. The Angels thump on the door and the wheel starts turning.

"What are you doing?" Amy asked as Octavian has placed a device on the door. The wheel stops turning. "Magnetized the door. Nothing could turn that wheel now," Octavian said. "Yeah?" The Doctor asked with a smirk. The wheel turns. "Dear God!" Octavian said.

"Ah, now you're getting it. You've bought us time though. That's good. I am good with time," The Doctor said. "Doctor," Katherine said. The wheel on a second door to the right of the main one starts to turn.

"Seal that door. Seal it now," Octavian said. One of the soldiers obeyed. "We're surrounded," River said. And now the door to the left. "Seal it. Seal that door," Octavian said. One of the soldiers obeyed. "Doctor, how long have we got?" Rebekah asked.

"Five minutes, max," The Doctor replied. "Nine," Amy said. "Five," The Doctor said. "Five. Right. Yeah," Amy said. "Then why'd you say nine?" Katherine asked. "I didn't," Amy said. "We need another way out of here," Rebekah said.

"There isn't one," Octavian said. "Yeah, there is. Course there is. This is a galaxy class ship. Goes for years between planet falls. So, what do they need?" The Doctor asked.

"Oh," River said and she and Rebekah exchanged a glance. "Can we get in there?" Octavian asked. "Well, it's a sealed unit, but they must have installed it somehow. This whole wall should slide up. There's clamps. Release the clamps," The Doctor said. He and a soldier moved things with two other soldiers. "What do they need?" Katherine asked. "They need to breathe," River replied.

The rear wall of the flight deck slides up. Katherine and Amy looked shock. "But that's. That's a," Amy said. "It's an oxygen factory," River said. "It's a forest," Katherine said. "Yeah, it's a forest. It's an oxygen factory," Rebekah said.

"And if we're lucky, an escape route," The Doctor said. "Eight," Amy said. "What did you say?" River asked. "Nothing," Amy said. Katherine, Rebekah and River exchanged a glance.

"Is there another exit? Scan the architecture, we don't have time to get lost in there," The Doctor said and Octavian got in. "On it. Stay where you are until I've checked the Rad levels," Octavian said. "But trees, on a space ship?" Amy asked as The Doctor got in.

"Oh, more than trees. Way better than trees. You're going to love this. Treeborgs. Trees plus technology. Branches become cables become sensors on the hull. A forest sucking in starlight, breathing out air. It even rains. There's a whole mini-climate. This vault is an ecopod running right through the heart of the ship. A forest in a bottle on a space ship in a maze. Have I impressed you two yet, Amy Pond and Katherine Williams?" The Doctor asked with a smile.

Katherine and Amy chuckled. "Seven," Amy said. "Seven?" The Doctor asked. He got out and walked over to Amy. "What?" Amy asked. "You said seven," The Doctor said as he looked in her eyes. "No. I didn't," Amy said. "Yeah, you did," Katherine said.

"Doctor, there's an exit, far end of the ship, into the Primary Flight Deck," Octavian said. "Oh, good. That's where we need to go," The Doctor said. "Plotting a safe path now," Octavian said. "Quick as you like," The Doctor said.

"Doctor? Excuse me? Hello, Doctor? Angel Bob here, sir," Bob said. The Doctor pulled out the walkie-talkie and set on a chair. "Ah. There you are, Angel Bob. How's life? Sorry, bad subject," The Doctor said.

"The Angels are wondering what you hope to achieve," Bob said. "Achieve? We're not achieving anything. We're just hanging. It's nice in here. Consoles, comfy chairs, a forest. How's things with you?" The Doctor asked.

"The Angels are feasting, sir. Soon we will be able to absorb enough power to consume this vessel, this world. and all the stars and worlds beyond," Bob said. "Well, we've got comfy chairs. Did I mention?" The Doctor asked. "We have no need of comfy chairs," Bob said. "I made him say comfy chairs," The Doctor said. "Six," Amy giggled.

The Doctor jumped to his feet. "Okay, Bob, enough chat. Here's what I want to know. What have you done to Amy?" The Doctor asked. "There is something in her eye," Bob said.

"What's in her eye?" The Doctor asked. "We are," Bob said. The Doctor looked in Amy's eyes. "What's he talking about? Doctor, I'm five. I mean, five. Fine! I'm fine," Amy said.

"You're counting," Katherine said. "Counting?" Amy asked. "You're counting down from ten. You have been for a couple of minutes," Rebekah said. "Why?" Amy asked The Doctor. "I don't know," The Doctor said. "Well, counting down to what?" Amy asked. "I don't know," The Doctor repeated.

"We shall take her. We shall take all of you. We shall have dominion over all time and space," Bob said. "Get a life, Bob. Oops, sorry again. There's power on this ship, but nowhere near that much," The Doctor said. "With respect, sir, there's more power on this ship than you yet understand," Bob said.

There was a screeching sound. "What's that? Dear God, what is it?" River asked. "They're back," Octavian said. "It's hard to put in your terms, Doctor Song, but as best I understand it, the Angels are laughing," Bob said. "Laughing?" The Doctor asked. "Because you haven't noticed yet, sir. The Doctor in the TARDIS hasn't noticed," Bob said.

"Doctor," Octavian said. "No. Wait. There's something I've missed," The Doctor said. They all turned they heads. A steaming W crack in the bulkhead above the entrance, and it is widening. The Doctor walked over to it. "That's like the crack from my bedroom wall from when I was a little girl," Amy said.

"Yes," The Doctor said. "Okay, enough. We're moving out," Octavian said. "Agreed. Doctor?" River said. "Yeah, fine," The Doctor said. He scans the crack. "What are you doing?" Rebekah asked.

"We're not leaving without you," Katherine said. "Oh yes, you are. Bishop?" The Doctor said. "Ms. Williams, Ms. Pond, Doctor Song, Doctor Brenner, now!" Octavian called. "Doctor?" Katherine said. "Come on!" River said. Amy grabbed Katherine's hand and they both rushed to the others.

In the forest, Katherine looked at Amy, who started to feeling not good. Amy stopped. "Amy?" Katherine asked and she stopped in front of her. "Amy, what's wrong?" Katherine asked.

River and Rebekah stopped beside Katherine. "Four," Amy said. She sways and set down, then lies on the mossy tree trunk. "Med scanner, now," River said as Katherine pulled Amy's head on her lap.

One of the soldiers gives River the med scanner. " Doctor Song, Doctor Brenner, we can't stay here. We've got to keep moving," Octavian said. "We wait for the Doctor," Rebekah said.

"Our mission is to make this wreckage safe and neutralise the Angels. Until that is achieved-" Octavian said. "Father Octavian, when the Doctor's in the room, your one and only mission is to keep him alive long enough to get everyone else home," River said.

The Doctor rushed to them. "Oi! Bishop, the Angels are in the forest," The Doctor said as he walked over to the four. "We need visual contact on every line of approach," Octavian said. "How did you get past them?" River asked.

"I found a crack in the wall and told them it was the end of the universe," The Doctor said. "What was it?" Rebekah asked. "The end of the universe. Let's have a look, then," The Doctor said. He grabbed the scanner from River and looked at it. "Doctor, what's wrong with her?" Katherine asked, worried.

"Nothing. She's fine," Rebekah said. "Everything. She's dying," The Doctor said. "Doctor!" River said. "Yes, you're right. If we lie to her, she'll get all better. Right. Amy, Amy, Amy. What's the matter with Amelia? Something's in her eye. What does that mean? Does it mean anything?" The Doctor asked.

"Doctor," Amy started. "Busy," The Doctor said. "Scared," Amy said. "Course you're scared. You're dying. Shut up," The Doctor said and he got up. "Okay, let him think," Rebekah said. "What happened? She stared at the Angel. She looked into the eyes of an Angel for too long," The Doctor said.

"Sir! Angel incoming," A soldier said. "And here," A second soldier said. "Keep visual contact. Do not let it move," Octavian said. "Come on, come on, come on. Wakey, wakey. She watched an Angel climb out of the screen," The Doctor said, "She stared at the Angel and, and -"

"The image of an Angel is an Angel," Amy said. "A living mental image in a living human mind. But we stare at them to stop them getting closer. We don't even blink, and that is exactly what they want. Because as long as our eyes are open, they can climb inside. There's an Angel in her mind," The Doctor said and he quickly put his hands over his mouth as Katherine's, Ricer's and Rebekah's eyes grew wide.

"Three. Doctor, it's coming. I can feel it. I'm going to die," Amy said quietly. "Please just shut up. I'm thinking. Now, counting. What's that about? Bob, why are they making her count?" The Doctor asked. "To make her afraid, sir," Bob said.

"Okay, but why? What for?" The Doctor asked. "For fun, sir," Bob said. The Doctor throw the walkie-talkie away in annoyance. "Doctor, what's happening to me?" Amy asked quietly.

"Inside your head, in the vision centres of your brain, there's an Angel. It's like there's a screen, a virtual screen inside your mind and the Angel is climbing out of it, and it's coming to shut you off," The Doctor said. "What do I do?" Amy asked quietly.

"If it was a real screen, what would we do? We'd pull the plug. We'd kill the power. But we can't just knock her out, the Angel would just take over," The Doctor said. "Then what? Quickly," Rebekah said. "We've got to shut down the vision centres of her brain. We've got to pull the plug. Starve the Angel," The Doctor said.

"Doctor, she's got seconds," River said. "How would you starve your lungs?" The Doctor asked. "I'd stop breathing," River said. "Amy, close your eyes," The Doctor said. "No. No, I don't want to," Amy said quietly.

"Good, because that's not you, that's the Angel inside you. It's afraid. Do it. Close your eyes," The Doctor said. Amy squeezed her eyes shut. The med scanner changed from red to green. "She's normalising. You did it. You did it," River said and she, Katherine, The Doctor and Rebekah breathe sigh of relief.