RANI: What just happened?
SARAH JANE: I think Sky just grew up.
CLYDE: What, with no birthdays? That's just rubbish.
METALKIND: I am too late.
MYERS: Face your destruction, Metalkind. The child is your doom.
(Energy plays over Sky.)
SKY: What's happening to me?
MYERS: Destroy him!
(Sky throws an energy bolt at Metalkind, and he flies back backwards into a wall.)
MYERS: Again, my child.
SARAH JANE: No.
SKY: What am I?
SARAH JANE: Oh, Sky, don't be frightened.
MYERS: You are the hammer to crush the Metalkind. You are the weapon and salvation of our species. Destroy your enemy.
SARAH JANE: No, Sky. You don't have to destroy anything. You don't have any enemies. Just be calm, and trust me. It's all right.
SKY: Sarah Jane?
SARAH JANE: Everything's going to be all right, I promise.
MYERS: Stop your meddling. Come with me. Return home and fulfil your purpose.
SARAH JANE: I don't think she wants to go with you.
MYERS: I am the child's mother.
CLYDE: Introducing Miss Myers. She spells it the alien way.
SARAH JANE: Well, my name is Sarah Jane Smith, and I don't think you're a fit parent.
MYERS: She is a weapon, grown in a laboratory to destroy the enemies of my species. I grew her.
SKY: What does she mean?
RANI: Oh, don't listen to her, Sky.
SARAH JANE: Well, none of us can help the way we come into this universe, but we have a say in what we become. And whatever you had planned for her, this is an innocent child, not a weapon, and I will protect her from the Metalkind and I will protect her from you.
(Sarah Jane sonicks a piece of equipment to create sparks as a diversion.)
SARAH JANE: Run! 
CALEB: Shall I stop them?
MYERS: I have a better idea.

[Outside the power station]

SARAH JANE: I have to get you as far away from that woman as I can.
SKY: Is she really my mother?
SARAH JANE: All I know for sure is somebody brought you to me to protect you, and that's what I've got to do.

[Summerhill nuclear power station]

(Miss Myers kneels over the fallen Metalkind and takes his gun.)
METALKIND: Have you come to finish the job, Fleshkind? Perhaps your weapon isn't as powerful as you thought.
MYERS: The weapon will do its job. And you're going to help me. (to Caleb) Wire him up.

[Outside Sarah Jane's home]

SKY: This is where you live, I remember.
RANI: What, you remember when you were a baby?
CLYDE: It was only about half an hour ago.
SKY: Why do you call a man who wears paper trousers Russell?
SARAH JANE: I beg your pardon, hmm?
CLYDE: It was a joke. It was meant to be funny. You know, it was supposed to make her laugh. Boy, does this feel familiar.
SARAH JANE: You were telling her jokes?
CLYDE: I was trying to stop her crying.
RANI: By making her laugh? You know what she does when she laughs.
SKY: I like Sid the Sleeve.
CLYDE: You had to be there. It's like
SKY: Everything's so green.
RANI: Well, this is England. It rains most of the time.
SARAH JANE: Sky, do you remember being brought here? Can you remember by who?
SKY: You are the first thing I remember.
SARAH JANE: Oh, I see. Well, now that you're grown up, can you control your powers?
SKY: I think so.
SARAH JANE: You've got to promise me that you will, because I need you to meet a friend of ours.

[Attic]

CLYDE: Welcome to the Bat Cave.
SKY: There's a cave on top of the house?
RANI: It's not a cave. It's an attic. Clyde was joking again. He does that. Sort of.
SARAH JANE: Mister Smith, I need you.
(But he doesn't come out of the fireplace.)
RANI: What's going on?
SARAH JANE: It's all right. Sky won't hurt you.
(Mister Smith comes out.)
SKY: Wow!
MR SMITH: Is the child under control?
SARAH JANE: It's all right. I promise.
SKY: What are you?
MR SMITH: I am a Xylok. A crystalline life form with highly sensitive cybernetic interfaces. I would be grateful if you would remain distant.
SKY: But can we still be friends?
MR SMITH: If my circuits remain intact.
SARAH JANE: Sky has undergone a metamorphosis. I need you to make sure she's unharmed. Now don't worry, it won't hurt.
MR SMITH: Scanning.
SKY: It tickles.
MR SMITH: Please, try not to laugh.
SARAH JANE: Mister Smith, stop fussing and analyse the scan.
MR SMITH: Biologically, Sky appears to be a healthy twelve year old child.
SKY: Twelve? Is that a good age?
RANI: Well, until the spots start.
SARAH JANE: Rani, take Sky. Have a look through Luke's things. See if you can find her something to wear.
RANI: Sure. Come on, Sky.
(Rani and Sky leave.)
SARAH JANE: Mister Smith, how did she transform into a teenager?
MR SMITH: Sky's synthetic DNA was programmed for this level of maturity to maximize her effectiveness.
CLYDE: As a weapon?
MR SMITH: As a bomb. Full activation would not only destroy Miss Myers' enemies across the universe, but also kill Sky.

[Luke's room]

SKY: Is Sarah Jane Luke's mother?
RANI: Yeah. She adopted him. Luke was made by aliens that wanted to take over Earth.
SKY: I like Earth. It's beautiful, noisy, smelly.
RANI: Yeah. It's all that. This must be so weird for you. Like, seeing the world for the first time. Everyone else, they just sort of grow up with it.
SKY: It's exciting.
(Rani lays out jeans and a t shirt.)
RANI: Try these. Now, they're not exactly fashion but you'll be all right.
SKY: What's fashion?
RANI: Clothes. Like wearing nice clothes, made for a girl.
SKY: What's a girl?
RANI: And Clyde thought he had it tough with Luke. Okay, let's log on to Ranipedia.

[Attic]

SARAH JANE: Why have they done this? To create a child that's a bomb. What sort of sick species is Miss Myers?
MR SMITH: A binary planetary system exists at the eye of the Tornado Nebula. One has carbon based life forms similar to those on Earth. The other evolved as boron based life.
CLYDE: And for those of us who were watching the netball team out the window during chemistry?
MR SMITH: Boron is a metalloid element.
SARAH JANE: On one planet, people evolved like us. Blood, bones, flesh. On the other, metal. That's amazing.
CLYDE: So this Fleshkind planet, that's where Sky's from?
MR SMITH: Yes. The Metalkind and Fleshkind have been at war for centuries. I believe Sky was created as a doomsday weapon to destroy the Metalkind.
SARAH JANE: Of all the terrible things I've seen, I've never known anything as hideous as using a child as a bomb.
SKY: What's a bomb?
SARAH JANE: Oh, Sky.
SKY: Miss Myers said I was a weapon. That's bad, isn't it? Am I bad?
CLYDE: No. No way. Miss Myers, she's the bad one, not you.
SKY: What am I, then?
SARAH JANE: The thing inside you. Miss Myers created you like that to kill her enemies, Metalkind.
SKY: Kill? What's kill?
SARAH JANE: You take away life. It dies. It no longer exists. And that's wrong. It's always wrong.
SKY: But if that's what I was made to do, that makes me bad.
RANI: No, because it's not your fault.
SARAH JANE: Mister Smith, there must be a way to reverse what Miss Myers has done to her.
SMITH I regret not. At a molecular level, Sky is a weapon programmed to destruct on contact with energies of massed Metalkind. I'm sorry, this cannot be undone.
CLYDE: Okay, if she's a bomb, can't we just defuse her?
SARAH JANE: Oh, Clyde. That's brilliant. Turn off the genetic trigger. Stop her detonating. Mister Smith, is that possible? So genetically she'd be a weapon but disarmed.
MR SMITH: Only Sky's creator can do that.
SKY: Then let's go ask her.
SARAH JANE: Sky, it's not going to be as easy as that. Taking you back to the power station, that's dangerous.
SKY: What's dangerous?
RANI: You could die.
SKY: Mister Smith said I could die, anyway. I don't want to be a bomb. Sarah Jane, will you help me?

[Outside the power station]

RANI: I can't help thinking this is a bad idea.
SARAH JANE: I know. The last thing I want is that woman anywhere near Sky. But Miss Myers is the only one that can deprogram her DNA, so she has to come with us.
CLYDE: Before we get as far as that, a small point. Miss Myers may have put the techies into a trance, but the guard looks lively.
SARAH JANE: I don't want to risking the gates again. Old investigative reporter's superstition. Never break in the same way twice.
SKY: I can do this.
(In his office, a guard watches the CCTV showing Sarah Jane driving towards the station, while he sips his mug of tea. The patrolling guard joins him just as all the car alarms in the staff car park go off. They run outside to investigate, and Clyde sonicks the barrier up behind their backs so that they can drive through.)
SARAH JANE: Now, I need you to stay here with Clyde and Rani.
SKY: What for?
CLYDE: Yeah, ditto.
SARAH JANE: I need to make sure that Sky is safe until I'm ready.
RANI: Oh, great, so we get baby-sitting duty?
SKY: Who are you calling a baby?
SARAH JANE: We're doing this by my rules, Sky. Until I convince Miss Myers that there's another way to end this war, a peaceful way, you're still in danger, and I need you to stay with Clyde and Rani. Now, do you promise me?
SKY: I suppose.
SARAH JANE: Right.

[Summerhill nuclear power station]

(Sarah Jane checks the sleeping techies, then Caleb sneaks up on her.)
SARAH JANE: Oh. Good. Now, take me to your leader.

[Outside the power station]

SKY: She might need our help.
RANI: She told us to stay here.
SKY: Do you always do what Sarah Jane tells you to?
CLYDE: Look this is a nuclear power station, which makes going in with you like doing a Houses of Parliament tour with Guy Fawkes.
SKY: What are you talking about?
RANI: He means it's not safe. Anyway, you promised.
SKY: I don't really understand promises.
(Sky runs towards the main building.)
RANI: Hey, wait!
CLYDE: That kid's going to get us into so much trouble.

[Control room]

MYERS: Miss Smith. Welcome back. Complete your work. I trust you're taking good care of my child?
SARAH JANE: Yes. You won't be getting your hands on her again.
MYERS: Don't judge me. Do you think I like what this war has forced me to do? To become?
SARAH JANE: Then I'm asking you, deactivate what you've done to Sky.
MYERS: Deactivate? She is our saviour. Her touch carries the power and the fury of an exploding sun. Once fully unleashed it will destroy every Metalkind in existence.
SARAH JANE: And Sky will be destroyed along with them.
MYERS: A sacrifice for the preservation of Fleshkind.
SARAH JANE: That's not a sacrifice, that's slaughter. Listen to me, please. There are other ways to end a war. You just have to want peace more than death. 
MYERS: You know nothing. For centuries the Metalkind have savaged my people. They have swore to destroy all flesh, and what chance does flesh have against jaws and blades of iron and steel? But perhaps you will learn.
(Miss Myers calls up a CCTV image on a screen. Caleb is wiring the Metalkind into the power station.)
SARAH JANE: What is this?
MYER: The child damaged the Metalkind just enough for me to make use of it. As a homing device.
SARAH JANE: A homing device? For what?
MYERS: It's being wired into the nuclear core. At the flick of a switch it will summon Metalkind and they will swarm here in hordes.
SARAH JANE: You're bringing your war to Earth?
MYERS: Once your Fleshkin experience Metalkind savagery, you will realise that the child will save us all. Caleb, make the final connection.
SARAH JANE: Metalkind, stop this. Earth has done nothing to hurt your people.
METALKIND [on screen]: Fleshkind tore the ore from our planet's womb to make their dumb slaves. They stole our children. We have sworn vengeance on all Fleshkind, on any world.
MYERS: I've scrambled its brain. He thinks he's calling all Metalkind to a glorious battle against Flesh, not to its destruction.
SARAH JANE: You're wasting your time. I will never give you Sky.
MYERS: It doesn't matter. The child is primed to activate on exposure to the massed energy of the Metalkind. When they come, they will be destroyed. She cannot stop it, and neither can you.
(She presses a buttton, and energy pulses through Metalkind.)

[Power station]

METALKIND: Come to me, Metalkindred. Join me and rend flesh.
(Elsewhere.)
CLYDE: What is it?
SKY: The Metalkind. I can feel them. They're coming.

[Control room]

SARAH JANE: If you bring the Metalkind to Earth you're worse than them. You're bringing war to an innocent planet.
MYERS: This is survival. But there's still time before I open the portal. Bring me the child and I will take her home to face our enemy, and your planet will never know the butchery of the Metalkind. What would you put first, Miss Smith? One child or your entire world?
SARAH JANE: Wait and see.
MYERS: Whatever you choose, Sarah Jane Smith, Sky will fulfil her destiny.

[Power station]

SARAH JANE: Sky! I thought I told you to keep her away.
RANI: She says the Metalkind are coming.
SKY: I've got to stop them.
SARAH JANE: No. Wars are ended by people talking, not by killing.
SKY: But Earth won't stand a chance. You've been kind to me, Sarah Jane. You've tried to keep me safe, but this is what I was created for.
SARAH JANE: Sky, listen to me. This is wrong. Killing is always wrong. If you confront the Metalkind, you will die.
SKY: If I don't, you will. Maybe this is why I was brought here. To save Earth.
(Sky runs into a lift and closes the doors with her energy.)
SARAH JANE: No, Sky.
CLYDE: Sky!
RANI: This way.
SARAH JANE: No. I'll go after Sky. You get to the control room and shut down the reactor to stop the Metalkind coming through.
CLYDE: Shut down a nuclear reactor? How exactly are we suppose to do that?
RANI: We find a way. Any way.
(Sky has gone down to the basement where Caleb and the Metalkind are. Meanwhile, Clyde and Rani find a guide to the power station.)
CLYDE: Okay, okay, control room, control room?
RANI: Control room, come on.
(Energy plays over Sky as she slowly approaches the Metalkind.)
SARAH JANE: Sky, stop it. You mustn't.
SKY: Stay back, Sarah Jane.
MYERS: You are too late, Sarah Jane Smith. The portal has opened. The Metalkind come, to their death.
SKY: I have to save you, Sarah Jane. I have to save Earth.

[Control room]

(Alarms are going off.)
RANI: Clyde.
CLYDE: What's all this about? It looks like a big arcade game.
RANI: This is what controls the nuclear fuel rods.
CLYDE: It's just like a James Bond movie. Pull out the rods, close down the reactor, save the world.
RANI: Only it's more like James Bond meets Mario.
CLYDE: Which is ace, because I'm brilliant at Mario.
RANI: If we don't do this right, Clyde, we don't just go back to the last level.
(They use the joysticks to target the rods on the screen.)
CLYDE: But it's not coming out.
RANI: It's not working.

[Power station]

SARAH JANE: Sky, don't let them use you.
SKY: It's what I am, Sarah Jane.
SARAH JANE: You're not a weapon. Not if you don't want to be. You are a child. A beautiful, innocent child. Remember what I told you, it's wrong to kill.

[Control room]

CLYDE: What are we doing wrong? What?
RANI: We've got to remove them in order. Two at a time.
CLYDE: Order? What order?
RANI: It's a spectrum. Richard of York gave battle in vain.
CLYDE: What?
RANI: Just do it. Red, orange, yellow, green, blue, indigo, violet. Well, come on. We haven't got much time.

[Power station]

(The big energy ball is getting noisy. Sound of distant marching boots.)
SKY: It's too late. They're coming. They're here!
MYERS: The end is nigh!

[Control room]

(The last two rods are ready to be removed.)
CLYDE: Almost.

[Power station]

SARAH JANE: No, Sky!

[Control room]

CLYDE: Last one.
(Sky screams and the portal disappears.)

[Chandra home]

(Power cut.)
GITA: What did you do to the telly?
HARESH: That does it. Tomorrow we get this house rewired.

[Control room]

COMPUTER: Emergency lighting activated.

[Power station]

(Clyde and Rani run to join the others. Sky is lying on the floor.)
MYERS: What have you done?
CLYDE: We did it. We shut down the core.
RANI: What happened?
SARAH JANE: All that energy had to go somewhere. Sky was like a lightning rod. She absorbed it all.
CLYDE: Is she going to be all right?
SKY: Wow!
SARAH JANE: Are you all right?
SKY: I feel, I feel different.
MYERS: You are different. I can feel it, too. That energy backlash, it's destroyed your genetic programming.
SKY: You mean, I'm not a weapon?
MYERS: Not even a peashooter. I have lost my daughter.
SKY: You saved me. And I'm not a bomb any more. Thank you.
(The Metalkind breaks free and grabs Miss Myers.)
METALKIND: I saved some energy just for you, Fleshkind.
(He transports them both away. Caleb 'wakes up'.)
SARAH JANE: Uh oh. I'm too tired to think of clever answers for awkward questions. Come on. Let's go home.

[Outside Sarah Jane's home]

CLYDE: Right, so all that light bulb popping and stuff, that's all finished?
SKY: I think so.
SARAH JANE: Mister Smith will be relieved. And thank you. I can always rely on you two to throw the switch when it matters.
(Gita and Haresh arrive with a bouquet of flowers.)
GITA: Sarah!
RANI: Mum.
GITA: I was telling Haresh all about you fostering beautiful baby Sky. Hello.
SKY: That's me. Hello.
HARESH: I thought you said she was a baby?
GITA: She was.
SKY: I grew up.
SARAH JANE: Yes, well, that's what babies do. But not just in one day. Obviously.
RANI: Obviously.
CLYDE: That would be, well, you know, alien.
SARAH JANE: Yes, there was a mix-up. Social services brought me the wrong child. Would you believe it? They brought me a baby called Sky when it should've been a teenager. With the same name. Sky. Sky Smith.
GITA: Sky Smith? Amazing.
SARAH JANE: Yes, she is. Really amazing. Now, if you'll excuse us.
GITA: Sky Smith.
(Gita and Haresh leave. The car headlights flash.)
RANI: Did you just see that?
CLYDE: Yeah, I reckon Sparky hasn't totally lost her spark.

[Attic]

SARAH JANE: I just want Mr Smith to make sure there are no ill-effects from that energy blast.
(Squark!)
SARAH JANE: What?
SHOPKEEPER: Really, Miss Smith, how can you possibly see through this?
(It is the macaw and his sidekick from Lost in Time, who is looking through the telescope.)
SARAH JANE: How did you get in here?
SHOPKEEPER: I'm afraid the Captain considers that privileged information.
SARAH JANE: Oh, yes, I forgot. You're the one in charge, aren't you?
SKY: The bird?
SHOPKEEPER: Things are seldom quite what they seem, young lady. And my, haven't you grown?
SARAH JANE: What, it was you? You brought Sky here?
SHOPKEEPER: And might I say, what a perfect name for such a perfect child, young Sky.
SARAH JANE: I'd still like to know who you are. Both of you.
SHOPKEEPER: Consider us servants of the universe.
SARAH JANE: Which means what, exactly?
SHOPKEEPER: Sometimes, things can't be left to chance. Sometimes, a breeze must blow from east to west, not north to south. Sometimes, a sky should be blue, not laden with cloud. And sometimes, a child must find her way home. Which is my task, Miss Smith. To put things in the right place. And of all the homes in all the universe, I could find none safer for this child than yours.
SARAH JANE: But who are you?
SHOPKEEPER: All in good time.
SKY: So, have you come back for me?
SHOPKEEPER: Well, that depends on you.
SKY: Can I stay here with you? That's what I want.
SARAH JANE: Oh, Sky, it's only been a day and I feel like I've known you since you were a baby. Yes, this is your home for as long as you want it to be.
SHOPKEEPER: Well, that's that then. Jolly good. Until the next time.
SARAH JANE: Oh, no, wait.
(The Shopkeeper and Captain vanish.)
SKY: Who was he, then?
SARAH JANE: I haven't the faintest idea. but I dare say we'll find out all in good time. Oh, you must be starving. How does pizza sound?
SKY: What's pizza?
SARAH JANE: Come on.
SARAH JANE [OC]: But the most wonderful thing about the universe is that there's always something more amazing to come.