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0:00:02 > 0:00:05- # There's plenty of adventure - in the sea
0:00:05 > 0:00:07- # Oli and Beth, friends are we
0:00:07 > 0:00:10- # Playing in the sea, - lessons one, two and three
0:00:10 > 0:00:14- # Swimming around, - fun for you and me
0:00:15 > 0:00:17- # Oli Dan y Don
0:00:18 > 0:00:20- # Oli Dan y Don
0:00:20 > 0:00:23- # Searching in the sea, - it's so exciting as you can see
0:00:24 > 0:00:26- # Under the sea, under the sea. #
0:00:30 > 0:00:32- UNDER PRESSURE
0:00:45 > 0:00:47- Ready! Steady! Dive!
0:00:52 > 0:00:53- The five fathom flags!
0:00:54 > 0:00:56- Slow down, Oli.
0:00:56 > 0:00:57- Got it! That was easy.
0:01:02 > 0:01:03- Up we go, slowcoach!
0:01:05 > 0:01:06- This isn't a race.
0:01:08 > 0:01:10- I won!
0:01:10 > 0:01:12- It isn't a race!
0:01:12 > 0:01:14- You're a bad loser.
0:01:14 > 0:01:15- You're a bad loser.- - No, Beth is right, Oli.
0:01:16 > 0:01:18- You went down and up too fast.
0:01:18 > 0:01:22- If you'd done that in deeper water, - you'd have been in trouble.
0:01:23 > 0:01:24- No way!
0:01:25 > 0:01:28- To gain your - deep sea diving certificate...
0:01:28 > 0:01:31- ..you must go twice as low as that.
0:01:31 > 0:01:32- ..you must go twice as low as that.- - We're ready.
0:01:32 > 0:01:33- I can't wait!
0:01:34 > 0:01:37- I hope - water pressure doesn't squash you.
0:01:38 > 0:01:40- On your marks! Get set! Dive!
0:01:49 > 0:01:50- We're nearly there.
0:01:51 > 0:01:53- I can feel - the water pressure building.
0:01:54 > 0:01:56- Yes, everything feels tight.
0:01:56 > 0:01:58- The flags!
0:01:58 > 0:01:59- The flags!- - Great! Let's go.
0:02:01 > 0:02:03- Oli, slow down!
0:02:06 > 0:02:08- I hope they're safe.
0:02:08 > 0:02:09- I hope they're safe.- - Shall I go and rescue them?
0:02:10 > 0:02:12- No, Sid. Give them another minute.
0:02:15 > 0:02:17- We did it!
0:02:17 > 0:02:19- Good work.
0:02:21 > 0:02:24- You're licensed - to dive up to ten fathoms.
0:02:26 > 0:02:28- What clever submarines!
0:02:29 > 0:02:33- Hooray! We're brilliant! - We're great!
0:02:34 > 0:02:36- Do you have a task for us?
0:02:36 > 0:02:38- Yes, I have a job for you.
0:02:50 > 0:02:51- This is our job?
0:02:52 > 0:02:56- Yes. I want you to take these old - pipes to Siencyn, to be recycled.
0:02:56 > 0:03:01- Can't we collect soil samples - with you, from the deep ditch?
0:03:01 > 0:03:04- No, I'll work - at a depth of 15 fathoms.
0:03:04 > 0:03:08- You're not qualified - to dive as deep as that.
0:03:08 > 0:03:12- If you go that deep, - water pressure will make you pop!
0:03:12 > 0:03:14- Yes, like an old lemonade can.
0:03:15 > 0:03:17- Rubbish! You say that to scare us.
0:03:18 > 0:03:21- Really? - Well, try it and see what happens.
0:03:22 > 0:03:23- See you later.
0:03:29 > 0:03:32- This pipe is stuck in the sand.
0:03:32 > 0:03:34- I can't believe we're doing this.
0:03:35 > 0:03:39- We're clearing old pipes - while Sid has fun, with Daf Diver.
0:03:41 > 0:03:42- Yahoo!
0:03:42 > 0:03:44- Yahoo!- - Slow down, Sid!
0:03:44 > 0:03:47- Give my suit a chance - to adjust to the pressure.
0:03:47 > 0:03:49- Sorry, Daf. I lost my head.
0:04:00 > 0:04:02- Daf Diver, are you alright?
0:04:02 > 0:04:04- Daf Diver, are you alright?- - Yes, I'm fine.
0:04:06 > 0:04:08- I can't move.
0:04:08 > 0:04:10- My leg's stuck.
0:04:10 > 0:04:12- Don't worry. I'll pick you up.
0:04:15 > 0:04:16- What's wrong, Crannog?
0:04:17 > 0:04:21- A problem with your left engine. - You're going nowhere fast, Sid.
0:04:22 > 0:04:24- Oh, no! We need help, Crannog.
0:04:26 > 0:04:27- Aye, aye! I'll send an SOS.
0:04:31 > 0:04:33- Be careful, Crannog!
0:04:33 > 0:04:34- Oh, no!
0:04:38 > 0:04:39- Phone overboard!
0:04:44 > 0:04:46- Crannog! No!
0:04:57 > 0:04:59- Dear me! These pipes are heavy.
0:05:00 > 0:05:02- You call that heavy?
0:05:03 > 0:05:05- This is what I call heavy!
0:05:10 > 0:05:12- It's going from bad to worse.
0:05:20 > 0:05:23- Please start turning, propellor!
0:05:23 > 0:05:24- We must help Daf Diver.
0:05:27 > 0:05:29- Come on!
0:05:29 > 0:05:31- Start!
0:05:31 > 0:05:32- Ahoy, Sidney!
0:05:32 > 0:05:34- Crannog! You're alive!
0:05:34 > 0:05:36- Crannog! You're alive!- - I'm back from the dark depths.
0:05:38 > 0:05:39- Did you find the phone?
0:05:39 > 0:05:42- Did you find the phone?- - I knew I'd forgotten something!
0:05:45 > 0:05:49- Oh, brilliant! We'll be stuck here - for the rest of our lives.
0:05:49 > 0:05:53- Don't worry. I'll be back - with some help before you know it.
0:05:54 > 0:05:55- Trust me.
0:05:58 > 0:05:59- Most of it is scrap.
0:05:59 > 0:06:01- You've done a great job.
0:06:02 > 0:06:04- Thank you, Siencyn.
0:06:04 > 0:06:05- Thank you, Siencyn.- - Head back to the centre.
0:06:06 > 0:06:08- Daf will be worried about you.
0:06:08 > 0:06:10- I'll phone him.
0:06:13 > 0:06:15- Strange! There's no answer.
0:06:15 > 0:06:18- Daf Diver always answers his phone.
0:06:38 > 0:06:40- This is really strange.
0:06:40 > 0:06:42- Where is everyone?
0:06:42 > 0:06:44- Where is everyone?- - They're still in the deep ditch.
0:06:44 > 0:06:44- They're still in the deep ditch.
0:06:48 > 0:06:50- They should be back by now.
0:06:50 > 0:06:52- They should be back by now.- - Maybe Wena knows.
0:06:53 > 0:06:54- Over here!
0:06:54 > 0:06:56- Over here!- - Was that you, Beth?
0:06:56 > 0:06:57- No, it was you.
0:06:58 > 0:06:59- No, it was me!
0:07:00 > 0:07:02- Crannog! What's wrong?
0:07:02 > 0:07:03- Crannog! What's wrong?- - They need help!
0:07:05 > 0:07:07- Who needs help?
0:07:07 > 0:07:11- Sid and Daf. - They're both stuck for ever.
0:07:11 > 0:07:13- They're in the deep ditch.
0:07:15 > 0:07:17- Oh, no!
0:07:17 > 0:07:20- How deep down are they, Crannog?
0:07:20 > 0:07:22- At least 20 fathoms.
0:07:24 > 0:07:27- What? 20 fathoms? - The deepest we've been is 10.
0:07:28 > 0:07:31- There's a first time for everything.
0:07:31 > 0:07:32- I'll wait for you.
0:07:33 > 0:07:36- Remember what Sid said - about the pressure.
0:07:37 > 0:07:38- It will squash us.
0:07:38 > 0:07:40- It will squash us.- - Not if we take it slowly.
0:07:40 > 0:07:43- We must - follow the rules Daf taught us.
0:07:43 > 0:07:45- Yes. Let's go for it.
0:07:45 > 0:07:46- Yes. Let's go for it.- - Down we go!
0:07:47 > 0:07:48- Dive, Oli, dive!
0:07:53 > 0:07:55- Ten fathoms. So far, so good.
0:07:56 > 0:07:59- We must - let our tanks empty really slowly.
0:08:02 > 0:08:04- We're nearly there, Beth.
0:08:04 > 0:08:05- My bolts are aching.
0:08:06 > 0:08:12- Oli, do you think Sid was right - when he said we'd be squashed?
0:08:13 > 0:08:14- I hope not!
0:08:16 > 0:08:17- Hey! Over here!
0:08:17 > 0:08:19- Sid! Are you alright?
0:08:20 > 0:08:21- Don't worry about me.
0:08:22 > 0:08:25- Daf Diver needs your help, - down there.
0:08:25 > 0:08:27- Is that you, Oli?
0:08:27 > 0:08:29- Is that you, Oli?- - I'm coming down.
0:08:29 > 0:08:31- Is that you, Oli?- - I'm coming down.- - Be careful! Take it slowly.
0:08:34 > 0:08:38- I'm glad to see you! - My leg's stuck between the rocks.
0:08:38 > 0:08:42- I'll drill you free - before you can say, "Fish fingers"!
0:08:47 > 0:08:50- I thought - we'd be stuck here forever.
0:08:50 > 0:08:51- How did you find us?
0:08:51 > 0:08:53- How did you find us?- - Crannog told us you were here.
0:08:54 > 0:08:55- Really?
0:09:05 > 0:09:07- Ready, Beth?
0:09:07 > 0:09:09- Let's head home to the centre.
0:09:10 > 0:09:11- It isn't a race!
0:09:11 > 0:09:14- It isn't a race!- - Oops, sorry! I'll take it slowly.
0:09:28 > 0:09:29- Where are you, Sidney?
0:09:30 > 0:09:32- I really hope you're alright.
0:09:32 > 0:09:35- Don't stay - at the bottom of the sea for ever!
0:09:37 > 0:09:40- I'm lost without you! - What shall I do?
0:09:41 > 0:09:44- What's all this noise, - you silly billy?
0:09:46 > 0:09:48- Sid! You're safe!
0:09:48 > 0:09:49- Hooray!
0:09:52 > 0:09:55- Come on! Let's head to the centre.
0:09:57 > 0:10:01- You two took a risk when you did - a 20 fathom dive without training.
0:10:02 > 0:10:06- I must take your 10 fathom - rosettes from you...
0:10:09 > 0:10:13- ..and replace them - with your 20 fathom rosettes.
0:10:14 > 0:10:16- Thanks, Daf Diver.
0:10:16 > 0:10:20- Congratulations. You got an A grade - for dive and rescue.
0:10:21 > 0:10:25- Well done to Oli the hero - and Beth the heroine.
0:10:25 > 0:10:27- I'm really proud of you.
0:10:28 > 0:10:31- We're fantastic! We're great!
0:10:32 > 0:10:34- What shall I do with you, Sid?
0:10:34 > 0:10:37- How long - must I stay in the dry dock?
0:10:39 > 0:10:43- Until Siencyn fixes that propellor, - or maybe even longer.
0:10:45 > 0:10:47- It's not the end of the world.
0:10:47 > 0:10:51- Crannog, your old friend, - will look after you.
0:10:51 > 0:10:52- Ouch! Don't pinch me!
0:11:26 > 0:11:26- .