0:00:20 > 0:00:23The Origin has a plan, but there's work to do first.
0:00:23 > 0:00:25I need help. Gaia?
0:00:25 > 0:00:28I will do whatever he needs me to do.
0:00:28 > 0:00:30Do you still have other Gaia's clothing?
0:00:31 > 0:00:33We'll come and get you when it's time.
0:00:35 > 0:00:37KEYPAD BEEPS
0:00:39 > 0:00:41Come on, guys - think.
0:00:41 > 0:00:44If mirror matter can only impact on mirror matter, then...
0:00:44 > 0:00:48We need some kind of missile to fire into the asteroid, made of...
0:00:49 > 0:00:53- ..mirror matter.- Which is invisible. So that'll be easy, right?
0:00:53 > 0:00:56- Not helping.- I'm sorry, but...
0:00:56 > 0:00:59how are we going to come up with a plan to save the world
0:00:59 > 0:01:03- if our parents couldn't?- For once in my life, I agree with AJ.
0:01:03 > 0:01:06- I am not giving up.- Me neither.
0:01:06 > 0:01:08If we haven't got long left on this planet,
0:01:08 > 0:01:11what I'd really like to do is say bye to Mackenzie.
0:01:13 > 0:01:15I'd like to say bye to Gregor, too.
0:01:15 > 0:01:18Excuse me while I throw up.
0:01:18 > 0:01:21OK, what about the object?
0:01:21 > 0:01:24It protected the prophecy about the asteroid in the first place,
0:01:24 > 0:01:27so perhaps it can tell us how to stop it.
0:01:27 > 0:01:29Our parents have already looked into that.
0:01:29 > 0:01:32Maybe they didn't know about the stone circle in the cave.
0:01:32 > 0:01:34I mean, it was all covered up.
0:01:34 > 0:01:37Right... So - object, then cave.
0:01:37 > 0:01:39Wait, weren't we told to stay here?
0:01:39 > 0:01:41Hm, do as we're told, or save the world?
0:01:41 > 0:01:44- Hm, difficult(!)- OK, I'm coming!
0:01:46 > 0:01:49Hey, I could fetch Nelly - we could say we're taking her for a walk.
0:01:50 > 0:01:52COMPUTER BEEPS
0:01:56 > 0:01:58- COMPUTER:- 'Six hours to impact.'
0:01:58 > 0:02:01Titan 2 already has manual override capability,
0:02:01 > 0:02:04so why does he want me to disable the mainframe computer?
0:02:04 > 0:02:07How should I know? Just get on with it, quick.
0:02:07 > 0:02:09Stop telling me what to do.
0:02:09 > 0:02:11I serve The Origin, not you.
0:02:15 > 0:02:16Come on, Cat - quick.
0:02:20 > 0:02:22DRAWERS RATTLE
0:02:23 > 0:02:24Got it!
0:02:28 > 0:02:30Nice one. Let's get the others.
0:02:31 > 0:02:33NELLY WHINES
0:02:35 > 0:02:37Come on...do something.
0:02:42 > 0:02:44Now what?
0:02:44 > 0:02:47Let's take a closer look at that picture again.
0:02:50 > 0:02:54- That's Earth being hit by the asteroid, right?- Yeah...
0:02:55 > 0:02:59..but...what's this other picture, next to it?
0:02:59 > 0:03:02It's kind of the same, but different.
0:03:04 > 0:03:07That's the asteroid being destroyed - look!
0:03:07 > 0:03:09You see, that's Earth in the background there, see?
0:03:09 > 0:03:13That's one scenario and this here's another.
0:03:15 > 0:03:17There's hope for the Earth yet, guys.
0:03:17 > 0:03:20We just need to figure out how to destroy that thing.
0:03:20 > 0:03:24Look at those - what are those round things? They look like Pictish balls.
0:03:24 > 0:03:28They're firing them at the asteroid in a catapult.
0:03:28 > 0:03:30Like that's going to work.
0:03:30 > 0:03:31What do those symbols say, Luke?
0:03:33 > 0:03:35I'd need Lawrence Winters' manuscript.
0:03:35 > 0:03:37You see, those symbols look similar
0:03:37 > 0:03:39to those on the Pictish ball that you had.
0:03:41 > 0:03:43What say we go and liberate it from Casey's room?
0:03:43 > 0:03:45Come on!
0:03:50 > 0:03:53Hey! Hey, hey! Halt!
0:03:58 > 0:04:00Where's your mother? I need to speak to her urgently.
0:04:00 > 0:04:02Hey, what are you doing?
0:04:02 > 0:04:05It's OK, Sgt Cooper. I can handle this. Mummy's pretty busy right now.
0:04:05 > 0:04:08- Is this about you losing your job? - No, it's about Gregor.
0:04:08 > 0:04:10Your insane cousin's kidnapped him.
0:04:16 > 0:04:19- Guys, we've got to go. - No, we can't - Nelly's gone.
0:04:19 > 0:04:22Why would she run off like that?
0:04:22 > 0:04:24- Nelly?- It's OK, she wouldn't have gone far.
0:04:24 > 0:04:27- I'll help you look for her. - I'm going this way. Nelly?
0:04:27 > 0:04:31- OK, I'll look over there. - Er, see you guys back at the castle.
0:04:32 > 0:04:34It was all a big lie.
0:04:34 > 0:04:37Gregor wasn't there.
0:04:37 > 0:04:39I don't know what to do.
0:04:39 > 0:04:42Casey says if we go to the police, he's going to hurt Gregor.
0:04:42 > 0:04:44Where do you think he could be keeping him?
0:04:46 > 0:04:48When we were younger, Casey said something about a den,
0:04:48 > 0:04:50somewhere along the beach road.
0:04:50 > 0:04:54- We could drive down there, maybe - see if we can spot anything.- Go!
0:04:54 > 0:04:56NELLY BARKS
0:04:56 > 0:04:57Where's the mutt come from?
0:04:59 > 0:05:00There you are!
0:05:02 > 0:05:04- What's Moira doing here? - It's a long story.
0:05:04 > 0:05:07Get in the van, we're going to look for Gregor.
0:05:07 > 0:05:10Hurry! I thought you wanted to say goodbye to him.
0:05:10 > 0:05:12Good girl.
0:05:15 > 0:05:17This is where The Origin lived.
0:05:23 > 0:05:26He spoke to us from here.
0:05:26 > 0:05:27Get that one.
0:05:42 > 0:05:43Whoa.
0:05:44 > 0:05:47- Hey, what are you doing here? - Came to find the Pictish ball.
0:05:47 > 0:05:49- What about you? - Oh, great minds think alike.
0:05:49 > 0:05:53- Just had a hunch it might be important.- We thought so, too.
0:05:53 > 0:05:55You're not our Gaia.
0:05:55 > 0:05:57- Oh, yeah!- What's she doing here?
0:05:57 > 0:06:01Oh, we're working together on a plan to get the clone bots on the rocket.
0:06:01 > 0:06:03We're working on a plan to save the world.
0:06:03 > 0:06:05- So, do you need the ball, or...? - No, it's OK.
0:06:07 > 0:06:08- Take it.- Great, thanks.
0:06:08 > 0:06:10Lawrence's manuscript.
0:06:12 > 0:06:15Catch you later, bro.
0:06:15 > 0:06:16Yeah.
0:06:18 > 0:06:21This is hopeless! We've been up and down this road twice now.
0:06:21 > 0:06:24- Maybe if we had a local map. - I've got one in the back.
0:06:29 > 0:06:32- I hope Gregor's OK. - You're not going to cry, are you?
0:06:32 > 0:06:35I've had enough of that with Moira.
0:06:35 > 0:06:39- If that's how you feel, why are you helping her?- Why wouldn't I help her?
0:06:39 > 0:06:41It's not normally your thing, helping people.
0:06:41 > 0:06:44And when did snidey remarks like that become YOUR thing?
0:06:44 > 0:06:48- I'm sorry.- I've known Gregor since I was little. He's my friend.
0:06:49 > 0:06:53He is. I've just...never told him.
0:06:55 > 0:06:58This should help us to pinpoint some local landmarks.
0:06:58 > 0:06:59Nelly?
0:07:01 > 0:07:04You left the back door open - she's gone!
0:07:04 > 0:07:06Nelly? Nelly!
0:07:06 > 0:07:09Nelly, come back!
0:07:09 > 0:07:11According to the map, this traitor's gate
0:07:11 > 0:07:14- should be around here somewhere. - There are several gates.
0:07:19 > 0:07:21It should be to the left of these doors.
0:07:30 > 0:07:33- What's that in there?- Yes!
0:07:40 > 0:07:42There, is that it?
0:07:42 > 0:07:45- "Flame or fire."- A fireball?
0:07:45 > 0:07:47How does any of this help us?
0:07:49 > 0:07:52OK... This might seem a bit out there...
0:07:53 > 0:07:56..but those pictures in the cave show these fireballs
0:07:56 > 0:07:59being lobbed into the asteroid and destroying it, right?
0:07:59 > 0:08:02- Yeah, by catapult. - Well, that was in Pictish times.
0:08:02 > 0:08:04We're a tad more sophisticated these days.
0:08:04 > 0:08:06That ball looks pretty solid to me, Slim.
0:08:06 > 0:08:08It can't be made of mirror matter.
0:08:09 > 0:08:12But what if it contains mirror matter?
0:08:12 > 0:08:15Well, if it does, then it can make contact with the asteroid, right?
0:08:15 > 0:08:16In theory, I suppose.
0:08:16 > 0:08:19Well, then we should test the ball at least for mirror matter, surely?
0:08:19 > 0:08:21How do we do that, exactly?
0:08:21 > 0:08:23I don't know.
0:08:26 > 0:08:27But your mum will.
0:08:32 > 0:08:33No!
0:08:33 > 0:08:36Do you not have a pass? What about the contact lens? Would that work?
0:08:36 > 0:08:40Nope, it's a good old-fashioned lock. We need a key.
0:08:40 > 0:08:44There's a great big bunch of them hanging in the cellar.
0:08:44 > 0:08:45Nelly?
0:08:46 > 0:08:50Nelly? Oh, hi. Have you found her?
0:08:50 > 0:08:52- Who?- Nelly.
0:08:52 > 0:08:54Yeah, she's back in the castle, with Luke and the others.
0:08:54 > 0:08:55Good.
0:08:56 > 0:09:00Have you changed your clothes? You're getting as bad as Lexy.
0:09:00 > 0:09:01What's this?
0:09:03 > 0:09:06- Is that a gate?- It's locked. - Is there a key?
0:09:06 > 0:09:09I need to go to the village and say goodbye to Mackenzie.
0:09:09 > 0:09:12- We're going to look for one. - OK, I'll come with you.- No, wait...
0:09:12 > 0:09:15Wait here, and if we find one, we'll come back and let you have it.
0:09:15 > 0:09:17OK.
0:09:19 > 0:09:20Why did you say that to him?
0:09:20 > 0:09:23To keep him quiet and make sure he stays put.
0:09:28 > 0:09:30NELLY BARKS
0:09:36 > 0:09:40What's she doing? There's nothing there, you stupid dog.
0:09:40 > 0:09:42Nelly, come on. Come on.
0:09:42 > 0:09:45- NELLY BARKS - Nelly!
0:09:47 > 0:09:50Gaia... Gaia...
0:09:52 > 0:09:53Gaia!
0:09:53 > 0:09:55GREGOR COUGHS
0:09:59 > 0:10:01GREGOR COUGHS
0:10:10 > 0:10:11Gaia!
0:10:14 > 0:10:16I told you there wouldn't be anyone up here.
0:10:16 > 0:10:17They'll all be down in the SZ.
0:10:17 > 0:10:19Let's head back to the mess, see if Noah's around.
0:10:19 > 0:10:20- He can let us in there.- Yeah.
0:10:20 > 0:10:23- Mom?- Are we glad to see you! - Slim has a theory...
0:10:23 > 0:10:26- About this Pictish ball. - Where did you get that?
0:10:26 > 0:10:28What would you say
0:10:28 > 0:10:31if I told you we think there's a chance to save the world?
0:10:31 > 0:10:33Is this some kind of joke?
0:10:33 > 0:10:35Far from it. We're deadly serious.
0:10:38 > 0:10:40- COMPUTER:- 'Five hours to impact.'
0:10:46 > 0:10:50Yes! Noah, you're my hero. You don't know how much this means to me.
0:10:50 > 0:10:52- That's OK.- Thanks, mate.
0:10:53 > 0:10:55We'll just let him get down the steps.
0:11:16 > 0:11:17Thank you.
0:11:20 > 0:11:23Can we just test the ball and see? Please?
0:11:23 > 0:11:26- We haven't got time to follow up a hunch, Slim.- It's more than a hunch!
0:11:26 > 0:11:29Those pictures in the cave predicted the end of the world, right?
0:11:29 > 0:11:32- And so did the object.- And Lawrence Winters followed his hunch
0:11:32 > 0:11:34and discovered that it was all true.
0:11:34 > 0:11:36Now, there are pictures in that cave
0:11:36 > 0:11:38that show the asteroid being destroyed.
0:11:38 > 0:11:41Yeah, with those.
0:11:41 > 0:11:43Well, what if it's true as well?
0:11:43 > 0:11:45What if there's a choice to be made here?
0:11:47 > 0:11:49OK.
0:11:49 > 0:11:52- I suppose there's no harm in running a few tests.- Yes!
0:11:54 > 0:11:56Hello, Gaia.
0:12:01 > 0:12:03- Origin...- Yes.
0:12:04 > 0:12:06I have returned.
0:12:07 > 0:12:09It's time to fulfil our destiny.