The Doctor, Amy, River, Father Octavian and the Clerics have jumped at the Doctor's signal. Caught by an updraft of the Byzantium's gravity field, they land upside down on the ship's hull. Octavian quickly notices that the Weeping Angels are beginning to restore; within an hour they'll be an army. The Doctor opens the door and leads everyone inside the corridor while the Angels pop the lights outside the entrance. However, right before they can enter the secondary flight deck, the door shuts. The Doctor seals the door outside, but tells them that the Angels are there now. As the Doctor works on the lights, four Angels break off the door and enter the corridor. In the nick of time, the Doctor prevents the Angels from draining the lighting grid's power. However, he gravely announces he will have to drain the power in the corridor to get the door open — including the lights. Octavian and his men line up to fire on the Angels while the Doctor tells Amy to turn the wheel on the door four times after he has cut the power. She responds with ten, before correcting herself.
Amy: (laughs) Six.
The Doctor: (into radio, stands quickly) Okay, well, enough chat. Here's what I want to know: what have you done to Amy?
Angel Bob: (over radio) There is something in her eye.
The Doctor: (into radio) What's in her eye?
Angel Bob: (over radio) We are.
Amy: What's he talking about? Doctor, I'm five. (everyone stares) I mean, five. Fine! I'm fine.
River: You're counting.
Amy: Counting?
The Doctor: You're counting down. From ten. You have been for a couple of minutes.
Amy: Why?
The Doctor: I don't know.
Amy: Well, counting down to what?
The Doctor: I don't know.
Angel Bob: (over radio) We shall take her. We shall take all of you. We shall have dominion over all time and space.
The Doctor: (into radio, sits) Get a life, Bob. Oops, sorry again. There's power on this ship, but nowhere near that much.
Angel Bob: (over radio) With respect, sir, there is more power on this ship than you yet understand. Because you haven't noticed yet. The Doctor in the TARDIS hasn't noticed.
The Doctor: (stands) No, wait, there's something...I've... (slowly turns to see glowing crack high in the wall) missed.
The Doctor runs back to the wall.
Amy: That's... That's like the crack from my bedroom wall from when I was a little girl.
The Doctor: Yes.
The Doctor remembers that crack on the day he and Amy first met.
The Doctor: Two parts of space and time that should never have touched.
The Doctor orders the others to run while he looks at it. Though Amy is reluctant, River pulls her away, knowing the Doctor knows what he's doing. Octavian and the clerics are walking slowly through the forest, keeping River and Amy safely in the center. Amy begins to walk slower and has a strange, almost sickly look on her face. River notices something is wrong.
River: Amy? (walks over and grips Amy's arms) Amy, what's wrong?
Amy: Four. (curls up on a moss-covered rock)
River: Med-scanner, now! (one of the clerics gives it to her)
Octavian: Dr Song, we can't stay here, we've got to keep moving.
River: We wait for the Doctor. (uses the scanner on Amy)
Octavian: Our mission is to make this wreckage safe and neutralise the Angels. Until that is achieved...
River: Father Octavian, when the Doctor is in the room, your only mission is to keep him alive long enough to get everyone else home. And trust me. It's not easy. Now, if he's dead back there, I'll never forgive myself, and if he's alive, I'll never forgive him. And, Doctor, you're standing right behind me, aren't you?
The Doctor: Oh, yeah.
River: (faces the Doctor) I hate you!
The Doctor: You don't. Bishop, the Angels are in the forest. (goes to Amy's side)
Octavian: We need visual contact on every line of approach.
River: How did you get past them?
The Doctor: Found a crack in the wall and told them it was the end of the universe.
Amy: What was it?
The Doctor: The end of the universe. Let's have a look then. (checks the med-scanner)
Amy: So. what's wrong with me?
River: Nothing. you're fine.
The Doctor: Everything, you're dying.
River: Doctor!
The Doctor: Yes, you're right, if we lie to her, she'll get all better! Right. Amy! Amy. what's the matter with Amelia? Something's in her eye. What does that mean? Doesn't mean anything.
Amy: Doctor.
The Doctor: Busy.
Amy: Scared!
The Doctor: Course, you're dying, shut up!
River: OK, let him think.
The Doctor: (stands) What happened? She stared at the Angel, she looked into the eyes of an angel for too long, (paces and slaps sides of his head) Come on, come on, wakey, wakey! She watched an Angel climb out of the screen. She stared at the Angel and…and...
Amy: The image of an Angel is an Angel.
The Doctor: A living image in a human mind. We stare at them to stop them getting closer, we don't even blink and that's exactly what they want, cos as long as our eyes are open, they can climb inside. There's an Angel in her mind. (puts hand over his mouth)
In a close-up of Amy's face, we see an Angel in her eye.
Amy: Three. Doctor, it's coming. I can feel it. I'm going to die!
The Doctor: Please just shut up, I'm thinking. Now counting, what's that about? (into radio) Bob, why are they making her count?
Angel Bob: (over radio) To make her afraid, sir.
The Doctor: (into radio) OK. but why. what for?
Angel Bob: (over radio) For fun, sir.
The Doctor growls in frustration and throws away the radio. One of the clerics watches the Doctor and turns back to look at the Angel when he hears a branch crack.
Amy: Doctor, what's happening to me? Explain!
The Doctor: Inside your head, in the vision centres of your brain, there's an Angel. (sits by Amy) 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.
Amy: Then what do I do?
The Doctor: (stands) If it was a real screen, what would we do, we'd pull the plug. but we can't just knock her out, the Angel would take over!
River: Then what? Quickly!
The Doctor: We've got to shut down the vision centers of her brain. We've got to pull the plug, starve the Angel.
River: (looks at scanner) Doctor, she's got seconds.
The Doctor: How would you starve your lungs?
River: I'd stop breathing.
The Doctor: Amy, close your eyes!
Amy: No, no, I don't want to.
The Doctor: Good, because that's not you, that's the Angel inside you, it's afraid! Do it! Close your eyes!
Amy hesitates but closes her eyes when the Doctor nods his head. The scanner beeps and the readings return to green.
River: She's normalising. (sighs) You did it! You did it! (putting away scanner) Still weak, dangerous to move her.
Amy: (sitting up) So, can I open my eyes now?
The Doctor: (bends down in front of Amy) Amy, listen to me. If you open your eyes now for more than a second, you will die. The Angel is still inside you. We haven't stopped it, we've just sort of...paused it. You've used up your countdown. You cannot open your eyes.
Amy was too weak to move and is left in the forest with the remaining Clerics while the Doctor, River and Octavian head to the primary flight deck.
Amy: Doctor... Please, can't I come with you?
Octavian: You'd slow us down, Miss Pond.
Amy: I don't want to sound selfish, but you'd really speed me up.
The Doctor: (sits next to Amy) You'll be safer here. We can't protect you on the move. I'll be back for you soon as I can. I promise.
Amy: You always say that.
The Doctor: I always come back. (stands) Good luck everyone. Behave. Do not let that girl open her eyes. And keep watching the forest. Stop those Angels advancing. Amy, later! (taps her on the head) River, going to need your computer. (leaves)
Amy: Yeah. Later.
Amy fidgets nervously with her hands. A masculine pair of hands grip hers. It's the Doctor.
The Doctor: Amy. you need to start trusting me, it's never been more important.
Amy: But you don't always tell me the truth.
The Doctor: If I always told you the truth, I wouldn't need you to trust me.
Amy: Doctor, the crack in my wall, how can it be here?
The Doctor: I don't know yet, but I'm working it out. Now, listen. Remember what I told you when you were seven?
Amy: What did you tell me?
The Doctor: (rests his forehead against hers) No, no... That's not the point. You have to remember. (kisses her on the head and leaves)
Amy: Remember what? Doctor? Doctor?
The Angels stake out the clearing and begin tearing apart the treeborgs to cut off the power supply to the lights. The lights flicker. When they go out, the Angels are nowhere to be seen. Light projects across the forest from the secondary flight deck. Marco, the squad leader, sends Crispin and Phillip to investigate it. Amy insists on seeing its source, though she will have to open her eyes. When she sees it is the crack from her wall, she collapses and begs to know why it is following her. Marco orders Pedro to go to the light. Amy reminds him he sent the other two, but he insists there weren't any others. After some time, Marco decides to go and investigate, having forgotten Pedro as well. Amy pleads with him to stay. As a compromise, he leaves her a spare communicator and agrees to speak to her through it. As he reaches the crack, his voice vanishes in a crackle of static. Amy is now left alone without anyone to guard her from the Angels: the one in her mind and the ones outside of it. Amy huddles alone in the forest, blind and with nothing but the communicator. The Doctor contacts her
Amy: (into radio) Hello!
The Doctor: (over radio) Is that you?
Amy: (over radio) 'Doctor?'
The Doctor: (into radio) Where are you? Are the Clerics with you?
Amy: (into radio) They've gone. There was a light and they walked into the light. Doctor, they didn't even remember each other.
The Doctor: (into radio) No. They wouldn't.
River: What is that light?
The Doctor: Time running out. (into radio) Amy. I'm sorry. I should never have left you there.
Amy: (into radio) Well, what do I do now?
The Doctor: (into radio) You come to us. Primary Flight Deck, other end of the forest.
Amy: (into radio) I can't see! I can't open my eyes.
The Doctor: (into radio) (uses screwdriver on communicator) Turn on the spot.
Amy: (over radio) Sorry. what?
The Doctor: (into radio) Just do it. Turn on the spot. When the communicator sounds like my screwdriver, you're facing the right way. Follow the sound.
Amy turns in a circle and listens to the whirring sound the communicator makes.
The Doctor: (over radio) You have to start moving now. There's time energy spilling out of that crack and you have to stay ahead of it.
Amy: (into radio) But the Angels, they're everywhere.
The Doctor: (into radio) I'm sorry, I really am, but the Angels can only kill you.
Amy: (into radio, starts walking) What does the Time Energy do?
The Doctor: (into radio)Just keep moving!
Amy: (into radio) Tell me!
The Doctor: (into radio) If the Time Energy catches up with you, you'll never have been born. It will erase every moment of your existence. You will never have lived at all. Now, keep your eyes shut and keep moving!
Terrified, she slowly makes her way across the forest, soon surrounded by the army of Weeping Angels fleeing from the crack. In their own terror, they do not realise her eyes are closed and their defence mechanisms kick in. They figure it out, though, when Amy trips over a root on the ground. They slowly remove the statue guise, and move in to kill her. Just as an Angel reaches towards Amy, River thankfully gets the teleport working and transports her to the flight deck.
River: Don't open your eyes. You're on the Flight Deck, the Doctor's here. I teleported you. (to Doctor) See? Told you I could get it working.
The Doctor: River Song, I could bloody kiss you.
River: Ah well, maybe when you're older.
The Angels drain all of the ship's energy, opening the flight deck doors in the process. Angel Bob demands the Doctor throw himself into the crack to save the Angels, Amy and River. River, as a time traveller, wants to throw herself in in place of the Doctor, but he laughs — she is not even as complicated as one Angel and it would take all of them to equal him. He tells her to get a grip. She continues to protest, but the Doctor tells her to seriously get a grip. River deduces his "genius" plan, and has Amy grab onto the console, warning her not to let go. With the words, "Night-night", the Doctor grabs onto the console and the ship's gravity fails. The planet's gravity field takes over in its place, sending the Angels plummeting into the crack while the Doctor watches in delight. The crack explodes in a burst of energy, and closes. Outside the temple, a second squad of Clerics cleans up the camp while Amy is leaning on a rock, wrapped in a blanket. The Doctor stands next to her with a cleric behind them.
Amy: Ah, Bruised everywhere.
The Doctor: Me too.
Amy: You didn't have to climb out with your eyes shut.
The Doctor: Neither did you, I kept saying. The Angels all fell into the time field. The Angel in your memory never existed. It can't harm you now.
Amy: Then why do I remember it at all? Those guys on the ship didn't remember each other.
The Doctor: You're a time traveller now, Amy. Changes the way you see the universe forever. Good, isn't it?
Amy: And the crack. Is that gone too?
The Doctor: Yeah, for now. But the explosion that caused it is still happening... somewhere out there, somewhere in time.
The Doctor and Amy look out at the ocean, after they say goodbye to River.
Amy: What are you thinking?
The Doctor: Time can be rewritten.