0:00:08 > 0:00:12This coral looks exactly the same as it looked two years ago.
0:00:12 > 0:00:15You're totally sure of that, Ant?
0:00:15 > 0:00:18I have a photographic memory for coral.
0:00:18 > 0:00:21Ha! You can't even remember my birthday.
0:00:21 > 0:00:23Easy! It's...
0:00:23 > 0:00:24You're not coral.
0:00:26 > 0:00:28Kids, how are we doing out there?
0:00:28 > 0:00:29Almost done, Mum.
0:00:33 > 0:00:36Jeffrey, I know you're trying to help
0:00:36 > 0:00:38and you know you're very photogenic.
0:00:39 > 0:00:41I've got a job to do.
0:00:41 > 0:00:44Fontaine, stop trying to distract me.
0:00:44 > 0:00:46I'm trying to concentrate.
0:00:46 > 0:00:48- I'll make it quick, then.- Alpheus?
0:00:48 > 0:00:50I'm flattered. You recognise my voice.
0:00:50 > 0:00:52I figured it was either you or that
0:00:52 > 0:00:55talking warthog on the nature channel.
0:00:55 > 0:00:58You paint a lovely picture, but I'm looking at a better one.
0:00:58 > 0:01:01I'm in a deep, deep trench, here, Ant,
0:01:01 > 0:01:04and I just found what Nereus said I'd never find.
0:01:05 > 0:01:08- Nereus?- Yes.
0:01:08 > 0:01:11I'm going to control the Monumentials, Ant.
0:01:11 > 0:01:19I am going to rule, because I'm the one who just discovered Lemuria.
0:01:21 > 0:01:22ALL: What?
0:01:24 > 0:01:26My family are explorers.
0:01:26 > 0:01:28We have been for generations.
0:01:28 > 0:01:30While others look up to the stars,
0:01:30 > 0:01:33we know there are an infinite number of things that shine in the darkness
0:01:33 > 0:01:37below. There are things lurking in the seas that long ago vanished into
0:01:37 > 0:01:40myth. My family are the Nektons,
0:01:40 > 0:01:41and we explore
0:01:41 > 0:01:44the deep.
0:02:02 > 0:02:04Our radios have a range of 50 miles, tops.
0:02:04 > 0:02:06So the trench has to be in that radius.
0:02:06 > 0:02:08Trenches, trenches.
0:02:08 > 0:02:10- Too many options.- The Ephemychron
0:02:10 > 0:02:13doesn't show any symbols that light up with any trenches.
0:02:13 > 0:02:16Our family's search for Lemuria has been going for generations.
0:02:16 > 0:02:18Alpheus could destroy all of that in an instant.
0:02:19 > 0:02:22The Chronicle of the Deep may have a clue.
0:02:25 > 0:02:28Aria, my destiny awaits.
0:02:28 > 0:02:29I'm going to open the gates.
0:02:31 > 0:02:33What's this? Is this a lock?
0:02:33 > 0:02:34Scanning.
0:02:38 > 0:02:40It is a lock.
0:02:40 > 0:02:42And it seems that this is the key.
0:02:42 > 0:02:44The Ephemychron.
0:02:46 > 0:02:49I can't calculate a direction without triangulation.
0:02:49 > 0:02:53But the signal was very clear so he's well within range.
0:02:53 > 0:02:55So Lemuria must be close.
0:02:55 > 0:02:5811 trenches within radio range.
0:02:58 > 0:03:02- We can't search them all.- So if Alpheus has discovered Lemuria,
0:03:02 > 0:03:06he'll get his hands on the device that controls the Monumentials.
0:03:06 > 0:03:09He wouldn't hesitate to wake them from their slumber.
0:03:09 > 0:03:14Great. Huge creatures waking up, creating chaos all over the world.
0:03:15 > 0:03:18Nereus, how exactly do you know Alpheus?
0:03:18 > 0:03:25He... Alpheus was the first person I thought might be the chosen one.
0:03:25 > 0:03:28What? Like me?
0:03:28 > 0:03:30But I'm nothing like him.
0:03:30 > 0:03:31Especially that hair.
0:03:34 > 0:03:36Why have you never told us this?
0:03:36 > 0:03:39It's more complicated than you realise.
0:03:41 > 0:03:45This control device in Lemuria, what does it look like?
0:03:45 > 0:03:47I know not.
0:03:47 > 0:03:50Only that it was crafted by Zeverus,
0:03:50 > 0:03:52Master artisan for Dereas, the Queen.
0:03:52 > 0:03:57You know who made it 6,000 years ago but not what it is?
0:03:57 > 0:04:01Correct. But thankfully, neither does Alpheus.
0:04:01 > 0:04:03And it can control them all?
0:04:03 > 0:04:04Even the terror?
0:04:04 > 0:04:07Yes, even the very worst of them.
0:04:07 > 0:04:11We must stop my former protege.
0:04:11 > 0:04:12ALARM
0:04:12 > 0:04:14Something's approaching!
0:04:18 > 0:04:20Quick, head to the bridge.
0:04:32 > 0:04:34Impossible!
0:04:35 > 0:04:37Kaiko, can you close the shield from out there?
0:04:37 > 0:04:39Working on it.
0:04:39 > 0:04:41They're not responding.
0:04:47 > 0:04:49I'll take the Ephemychron.
0:04:49 > 0:04:52- Thank you!- No!
0:04:52 > 0:04:53Kaiko, he's getting away.
0:04:53 > 0:04:55- The shields!- Come on, come on.
0:04:55 > 0:04:56Got it.
0:05:00 > 0:05:02No!
0:05:02 > 0:05:04Alpheus!
0:05:04 > 0:05:06Ant!
0:05:06 > 0:05:08Ant, wait.
0:05:08 > 0:05:10Come on.
0:05:16 > 0:05:20He's moving too fast. We'll never catch Alpheus in our knights.
0:05:20 > 0:05:23No, but Ant might in the Shadow Knight.
0:05:31 > 0:05:34Sensors detecting Antaeus Nekton.
0:05:45 > 0:05:46No.
0:05:46 > 0:05:48Aria, get rid of him.
0:05:54 > 0:05:55Oh, no.
0:05:55 > 0:05:57Argh!
0:05:58 > 0:06:00I've lost control of the Shadow Knight.
0:06:00 > 0:06:02Can anyone hear me?
0:06:02 > 0:06:04Come on. Come on!
0:06:04 > 0:06:06Please!
0:06:08 > 0:06:10Hello? Anyone?
0:06:10 > 0:06:12Propulsion out.
0:06:12 > 0:06:15Prospects kind of bleak.
0:06:15 > 0:06:16Oh, no!
0:06:16 > 0:06:19Argh!
0:06:19 > 0:06:22Let's see if we can improve those prospects.
0:06:22 > 0:06:27Replacing the power cells.
0:06:27 > 0:06:29That feels better.
0:06:29 > 0:06:30We could have lost you, Ant.
0:06:30 > 0:06:33And we have lost Alpheus.
0:06:33 > 0:06:35Unless someone fiddled with his
0:06:35 > 0:06:37thrusters and put a tractor on his sub.
0:06:45 > 0:06:47Our maximum speed has been
0:06:47 > 0:06:49compromised by the actions of Antaeus Nekton.
0:06:49 > 0:06:51Irritating.
0:06:51 > 0:06:54The phrase "it could have been worse" comes to mind.
0:07:13 > 0:07:16Kaiko, we're maintaining pace with them.
0:07:16 > 0:07:19He's probably not in a hurry because he thinks he lost you.
0:07:19 > 0:07:21Wait! He's slowing down even more.
0:07:25 > 0:07:27The signal's gone.
0:07:27 > 0:07:29- Have we lost them?- No.
0:07:29 > 0:07:32There's a trench where his signal disappeared.
0:07:32 > 0:07:34Before we can reactivate the controls, I'll need to...
0:07:34 > 0:07:37Nereus?
0:07:37 > 0:07:38I started this.
0:07:38 > 0:07:40I need to fix it.
0:07:43 > 0:07:45There's the trench, just ahead.
0:07:50 > 0:07:53Wow! The gates of Lemuria.
0:07:55 > 0:07:58Unbelievable!
0:07:58 > 0:08:00It's...
0:08:00 > 0:08:01huge!
0:08:03 > 0:08:06After all this time, what my parents,
0:08:06 > 0:08:09what my grandparents would have given to see this!
0:08:09 > 0:08:11Every dream they ever had
0:08:11 > 0:08:13just came true.
0:08:15 > 0:08:17Look.
0:08:17 > 0:08:20- Alpheus.- Let's go.
0:08:21 > 0:08:23Kill propulsion.
0:08:23 > 0:08:25We should be able to approach undetected.
0:08:30 > 0:08:32Hello, Fontaine.
0:08:32 > 0:08:34OK, so we were detected.
0:08:35 > 0:08:37Aria, we want the Ephemychron back.
0:08:37 > 0:08:40The Ephemychron is in use.
0:08:43 > 0:08:45Alpheus.
0:08:45 > 0:08:47Aria, keep them busy.
0:08:48 > 0:08:50Clear the window!
0:08:52 > 0:08:55Aria's using an electromagnet.
0:08:55 > 0:08:56Gah!
0:08:56 > 0:08:58I'm OK. I'm free.
0:08:58 > 0:09:01- I'm stuck.- Ant, go.
0:09:01 > 0:09:03- What about you?- The Mag Knight's carbon fibre.
0:09:03 > 0:09:05It won't affect me. I'll brief Fontaine.
0:09:05 > 0:09:07You stop Alpheus.
0:09:16 > 0:09:18That doesn't belong to you.
0:09:18 > 0:09:20You should be helping me, Ant.
0:09:20 > 0:09:22Behind these gates is Lemuria and
0:09:22 > 0:09:25the secret to controlling the Monumentials.
0:09:25 > 0:09:28Think of the good we could do with that power, Ant.
0:09:28 > 0:09:31With the Monumentials in my control, I could stop corrupt governments.
0:09:31 > 0:09:34I could stop wars.
0:09:34 > 0:09:37By using leviathans of the sea to threaten people?
0:09:37 > 0:09:39World peace, Ant.
0:09:39 > 0:09:41Think about it.
0:09:41 > 0:09:43With a Monumential on their doorstep,
0:09:43 > 0:09:45people would have to listen.
0:09:45 > 0:09:47I'd be a hero.
0:09:47 > 0:09:51Your idea of a hero sounds a lot like a bigger bully.
0:09:51 > 0:09:54I trust you, Ant.
0:09:54 > 0:09:55We have a bond.
0:09:55 > 0:09:58Really? Not feeling it myself.
0:09:58 > 0:10:00We're cousins from two different
0:10:00 > 0:10:04branches of the Royal family of Lemuria.
0:10:04 > 0:10:06That's pretty crazy.
0:10:06 > 0:10:08- Even for you!- Accept it, Ant.
0:10:08 > 0:10:12Only the youngest in each family line can use the Ephemychron.
0:10:15 > 0:10:17Whoa!
0:10:24 > 0:10:25It's my time, Ant.
0:10:28 > 0:10:29No!
0:10:31 > 0:10:35Behold! Lemuria!
0:10:39 > 0:10:41Could it really be?
0:10:43 > 0:10:45Oh, my...
0:10:45 > 0:10:47GROWLING
0:10:47 > 0:10:50What's that sound?
0:10:50 > 0:10:52That's not a sound ancient cities make.
0:10:52 > 0:10:53Ah!
0:10:58 > 0:11:00It's the terror!
0:11:00 > 0:11:03Alpheus, that's not Lemuria.
0:11:03 > 0:11:04You've woken the kraken!
0:11:26 > 0:11:29Alpheus, use the Ephemychron.
0:11:29 > 0:11:30Close the gates!
0:11:35 > 0:11:38What's happening? Why won't it close?
0:11:38 > 0:11:40Nothing can stop it now.
0:11:40 > 0:11:43We're doomed! Aria, start the engines.
0:11:43 > 0:11:45Move away from here now.
0:11:46 > 0:11:47No, what are you doing?
0:11:52 > 0:11:53Oh, no.
0:11:55 > 0:11:58I'm taking the Ephemychron, and I'm finding Lemuria.
0:11:58 > 0:12:01Then I'll find a way to make the kraken mine!
0:12:01 > 0:12:03Alpheus, come back!
0:12:03 > 0:12:05Alpheus, no!
0:12:05 > 0:12:07Bring it back!
0:12:17 > 0:12:18Nereus!
0:12:18 > 0:12:20Stay on Alpheus.
0:12:20 > 0:12:22Get the Ephemychron.
0:12:22 > 0:12:23I'm on it.
0:12:25 > 0:12:26We're coming, Nereus.
0:12:28 > 0:12:30Oh, my re-breather goes on the head...
0:12:30 > 0:12:32Oh!
0:12:35 > 0:12:37BOTH: Argh!
0:12:43 > 0:12:45Keep going, Aria!
0:12:48 > 0:12:50Huh?
0:12:56 > 0:12:57No!
0:12:59 > 0:13:02Oh, how I've wanted to do that!
0:13:02 > 0:13:04We have to close those gates.
0:13:04 > 0:13:07We can't let that thing be unleashed on the world.
0:13:07 > 0:13:09You can't, you'll lose the Ephemychron.
0:13:09 > 0:13:12Childish optimism won't cut it this time, Ant.
0:13:12 > 0:13:14Childish optimism is all I've got.
0:13:19 > 0:13:22OK, that's impressive.
0:13:22 > 0:13:24Alpheus, we must get clear.
0:13:25 > 0:13:27Whoa!
0:13:27 > 0:13:29You're all doomed!
0:13:33 > 0:13:35It's opening! Oh, no!
0:13:35 > 0:13:38I need them to move in the opposite direction.
0:13:38 > 0:13:40That's it, Antaeus. Now close it!
0:13:42 > 0:13:45This is going to hurt, isn't it?
0:13:47 > 0:13:49Nereus!
0:13:49 > 0:13:51Oh, oh, oh!
0:13:59 > 0:14:01Ant!
0:14:04 > 0:14:05- I'm OK.- Go help Nereus.
0:14:05 > 0:14:07We can handle the gate.
0:14:11 > 0:14:13Oh, no, it's not working!
0:14:15 > 0:14:17If we don't close the gates soon,
0:14:17 > 0:14:19the kraken will break them wide open.
0:14:19 > 0:14:22Hurry! How do we close it?
0:14:22 > 0:14:23No idea.
0:14:25 > 0:14:27Nereus, are you OK?
0:14:27 > 0:14:29Go back.
0:14:30 > 0:14:33Only you can work the gates.
0:14:33 > 0:14:35Help me get you into the knight.
0:14:35 > 0:14:37It'll protect you.
0:14:37 > 0:14:39No, the world needs you.
0:14:39 > 0:14:41I'll get to the world when you're safely inside.
0:14:41 > 0:14:43You are...
0:14:43 > 0:14:45very stubborn.
0:14:45 > 0:14:48Thank you. I come from a long line of stubborn.
0:14:50 > 0:14:52I'm all out of ideas.
0:14:52 > 0:14:54We need Ant.
0:14:55 > 0:14:57There has to be a way.
0:14:57 > 0:14:59Dad, watch out!
0:15:05 > 0:15:08Will, kids, getting into position for extraction.
0:15:08 > 0:15:10The knight will keep you safe.
0:15:10 > 0:15:14You're definitely not like Alpheus, Ant.
0:15:14 > 0:15:16I never thought I was.
0:15:21 > 0:15:22Whoa!
0:15:28 > 0:15:29Mum!
0:15:29 > 0:15:31The gates, Ant. Close them!
0:15:31 > 0:15:34Come on, work!
0:15:34 > 0:15:36Close!
0:15:36 > 0:15:38You have to work, please!
0:15:49 > 0:15:51Ant, what's wrong?
0:15:51 > 0:15:53It's not working for me.
0:15:53 > 0:15:57I can't do it. I failed.
0:16:02 > 0:16:04Ant, look out.
0:16:04 > 0:16:06Argh!
0:16:10 > 0:16:12Try again, Ant.
0:16:12 > 0:16:16I've tried. It didn't work.
0:16:16 > 0:16:17There's no-one else, Ant.
0:16:17 > 0:16:20It has to be you.
0:16:20 > 0:16:22It's too big for me.
0:16:22 > 0:16:24You're not alone, Ant.
0:16:25 > 0:16:29Jeffrey? You came out here to face the kraken with me?
0:16:30 > 0:16:34ROARING
0:16:40 > 0:16:44- We're all with you, Ant. - Don't give up, son.
0:16:44 > 0:16:48You've got this. Alpheus couldn't close them, but you can.
0:16:49 > 0:16:52You are the opposite of Alpheus.
0:16:54 > 0:16:56Wait a minute! That's it!
0:16:57 > 0:17:00I get it. The opposite.
0:17:06 > 0:17:08Ant, it's starting to close!
0:17:11 > 0:17:13All right!
0:17:15 > 0:17:17Huh?
0:17:19 > 0:17:21That's it!
0:17:28 > 0:17:30No way! It's working!
0:17:33 > 0:17:35Ha-ha! Yes!
0:17:40 > 0:17:42Ha-ha!
0:17:49 > 0:17:51Yeah! Nice job, Ant.
0:17:51 > 0:17:53Ant, you did it!
0:17:54 > 0:17:56Yes!
0:17:56 > 0:17:57Woo-hoo!
0:18:00 > 0:18:05- What are doing? - We're trying to hug you.
0:18:05 > 0:18:07And failing badly.
0:18:07 > 0:18:09Yeah, knights aren't really built for hugging.
0:18:11 > 0:18:13Look!
0:18:17 > 0:18:19Wow!
0:18:20 > 0:18:22That's beautiful.
0:18:24 > 0:18:25I know.
0:18:27 > 0:18:30After all these years,
0:18:30 > 0:18:32I finally know...
0:18:32 > 0:18:37- What is it?- The next step in your journey.
0:18:39 > 0:18:41Faster, Aria. Move!
0:18:43 > 0:18:45Monitored radio transmissions
0:18:45 > 0:18:49confirm Antaeus Nekton has succeeded in closing the gates.
0:18:49 > 0:18:50He what?
0:18:52 > 0:18:54I've seen the kraken
0:18:54 > 0:18:58and lived. Can you imagine controlling that?
0:18:58 > 0:19:01Once I locate the real Lemuria,
0:19:01 > 0:19:04I'll find the device to control all the Monumentials -
0:19:04 > 0:19:06the kraken included.
0:19:06 > 0:19:08But you require the Ephemychron to open the gates.
0:19:08 > 0:19:11You're so wrong, Aria.
0:19:11 > 0:19:13Under my control,
0:19:13 > 0:19:17the other Monumentials will tear the gates down and the world will be
0:19:17 > 0:19:20- mine.- Final analysis complete.
0:19:20 > 0:19:24- What is it?- He's braver than you.
0:19:28 > 0:19:34Alpheus has never seen this but I recognised the symbol immediately.
0:19:34 > 0:19:39The sceptre of Dereas, last Queen of Lemuria.
0:19:39 > 0:19:42So the sceptre is the device that will control the Monumentials?
0:19:42 > 0:19:45Yes, I'm sure of it.
0:19:45 > 0:19:48Nereus? Alpheus said I was...
0:19:48 > 0:19:52We were descended from royalty.
0:19:52 > 0:19:55- Yes.- I don't feel very royal.
0:19:55 > 0:19:59Well, the task ahead does not need you to be royal.
0:19:59 > 0:20:02It needs you to be together.
0:20:07 > 0:20:10Yes, yes, all of you.
0:20:10 > 0:20:14All we have to do is find Lemuria before Alpheus does.
0:20:16 > 0:20:18It's out there.
0:20:18 > 0:20:21Somewhere in the sea.
0:20:21 > 0:20:25Great, so we just have to continue exploring the endless ocean,
0:20:25 > 0:20:28all the while trying not to wake giant monsters.
0:20:28 > 0:20:31- Are you up for it? - Of course I'm up for it.
0:20:31 > 0:20:34Then let's go find Lemuria!