1: EXT. CLIFFS AND BEACH
(The DOCTOR and JO run towards the water but from one side, the minimoke stops and the guards get out with their rifles raised. They look to the other side
and see a line of barbed wire and a red sign reading "DANGER MINEFIELD". They are trapped on three sides with the sea on the fourth. To make matters
more difficult, the MASTER switches on the device and points it at the waves. Almost immediately, a SEA DEVIL rises from the water and starts to make its way
inland. One of the guards sees it and shouts to the others as he points.)
CASTLE GUARD BARCLAY: Look!
(The other guards see it and drop their rifles in amazement. JO also sees the creature.)
JO: Doctor - look!
(The DOCTOR looks at the approaching reptile as it gets nearer to the shoreline. Up on the cliff, TRENCHARD holds his hat up as shield against the light as
he looks down on the creature in amazement.)
TRENCHARD: What is it?
MASTER: (Smiles.) One of the creatures that have been destroying the ships.
TRENCHARD: You told me it was enemy agents. Why didn't you tell me the truth?
MASTER: If I had, would you have believed me?
(Down below, the DOCTOR and JO look round is desperation. They see that the guards are still diverted by the SEA DEVIL.)
DOCTOR: There's only one thing for it - we'll have to go through the minefield.
(He pulls her towards the barbed wire as the SEA DEVIL reaches the beach. It turns and looks at the guards who have lowered there weapons as they look on in
shock. It raises its open weapon and a flame shoots out from the disc. A guard falls dead and another shot fires out. Another guard falls as the remaining take
up defensive cover behind the minimoke and start returning fire. As a mini-battle erupts, the two fugitives reach the first of two rows of barbed wire. The
DOCTOR hesitates momentarily and then throws himself down onto the first set, enabling JO to step over him. He gets up and throws himself back first onto the
second row and JO repeats the manoeuvre. They crouch down at the very edge of the minefield. The DOCTOR reaches into his pocket, takes out his sonic screwdriver
and starts to make adjustments to it.)
JO: We'll get blown up.
DOCTOR: No, don't worry. My sonic screwdriver - it converts into rather a good mine detector.
(He switches it on and it starts to give out a regular high-pitched pulsing noise. Behind them, the noise alerts the SEA DEVIL which switches it attention
away from its fight with the guards and turns to face the two escapees in the minefield. Meanwhile, a higher and louder pitched sound emanates from the sonic
DOCTOR: Look out. Look, there's one over there. Now, you'll have to move round to the right. Now follow me.
(They get up and start to step carefully across the sand. The SEA DEVIL watches them go but makes no move to follow - much to the anger of the watching
MASTER: Stupid beast! Why doesn't it attack them?!
(He makes an adjustment to the device and the signal from it increases in tone. The SEA DEVIL starts to run after the DOCTOR and JO. They meanwhile are
making tortuously slow progress across the minefield. JO looks back.)
JO: Doctor, it's following us!
(The SEA DEVIL steps through the barbed wire previously crushed down by the DOCTOR.)
JO: (Panicking.) Doctor!
DOCTOR: Relax, Jo, relax.
(They have stopped and the DOCTOR makes another adjustment to his screwdriver. He points the device across the minefield at the approaching reptile and
presses a switch. A different tone comes from the screwdriver and two of the mines explode. He presses the switch again and another mine explodes right in front
of the SEA DEVIL. It gives out a cry of pain and staggers. The DOCTOR activates another two explosions and the SEA DEVIL screams out again, turns and runs back
over the barbed wire, back towards the safety of the water.)
DOCTOR: Right, Jo, follow me.
(The DOCTOR re-adjusts the screwdriver and he and JO their progress through the remainder of the minefield as the SEA DEVIL slips beneath the waves.)
2: INT. NAVAL BASE. RADIO ROOM
(HART walks into the radio room where BOWMAN is on duty at the radio set. BLYTHE is also there.)
CAPTAIN HART: Anything from the sub yet?
LDG. TELEGRAPHIST BOWMAN: It's no good, sir, there's nothing.
CAPTAIN HART: (Irritated.) They had instructions to surface over an hour ago.
3RD OFFICER JANE BLYTHE: (Calmly.) Maybe they've found something, sir. Perhaps they're still investigating.
CAPTAIN HART: If they haven't surfaced by now, then something must be stopping them. All right, sub-miss procedure. Alert submarine command, we'll set up
a full scale search right away.
3RD OFFICER JANE BLYTHE: Sir.
(He walks out as BLYTHE picks up a phone.)
3: INT. SUBMARINE CONTROL ROOM
(Inside the trapped and sunken submarine, RIDGEWAY and MITCHELL listen carefully at a closed and bolted bulkhead door in the control room. A tannoy message
in a Scottish accent comes through.)
SUBMARINE RATING: (OOV: Over tannoy.) Submarine indicator buoys still won't release, sir.
(RIDGEWAY leaves MITCHELL crosses to C.P.O. SUMMERS who is getting dressed into an orange freeascent submarine escape suit.)
COMMANDER RIDGEWAY: All right, Summers. Radio Captain Hart the moment you surface. Tell him we're immobilised on the sea bed by some unknown force and
intruders have broken through the hull.
C.P.O. SUMMERS: Aye aye, sir.
COMMANDER RIDGEWAY: Have you checked your R/T?
C.P.O. SUMMERS: Er, yes sir.
COMMANDER RIDGEWAY: All right, carry on. Good luck.
(SUMMERS moves off as MITCHELL calls over from the hatch. There is a hissing noise in the air.)
LT. COMMANDER MITCHELL: Something's happening to this door, sir! It's getting hot!
COMMANDER RIDGEWAY: Right, small arms number one.
LT. COMMANDER MITCHELL: Right, sir.
(MITCHELL moves across to a locked and barred armoury cupboard, taking out his keys. As MITCHELL starts to unlock the cupboard, SUMMERS calls over from
another hatch near to the cupboard.)
C.P.O. SUMMERS: For'ard hatch is jammed, sir!
COMMANDER RIDGEWAY: All right, Summers.
(RIDGEWAY points out places from which the ratings are to take up position.)
COMMANDER RIDGEWAY: Johnson, here. Petty Officer, here.
(He joins MITCHELL and starts to hand out guns from the cupboard. Meanwhile, a part of the hatch door starts to melt away in a similar fashion to the one in
the sea fort. There is a red glow behind it.)
COMMANDER RIDGEWAY: Right, take cover.
(All the men in the room find places of cover and crouch down, guns raised and primed. There is a tense moment as the men watch what remains of the bulkhead
LT. COMMANDER MITCHELL: The door's going!
COMMANDER RIDGEWAY: (Calmly.) All right, number one.
(The door is now fully breached.)
COMMANDER RIDGEWAY: Hold your fire until we see what they are.
(A SEA DEVIL pushes its way through the melted remains of the door. The men are dumbstruck by the sight of the lizard.)
4: INT. CASTLE. MASTER'S ROOM
(Back at the castle prison, TRENCHARD has still not recovered from the sight on the beach. He angrily paces the MASTER'S room while his impatient prisoner
sits and watches him.)
TRENCHARD: I just can't take it in. It...it's all too much for me.
MASTER: Trenchard, you really must be more calm. Believe me, it's very simple.
TRENCHARD: Simple? You've misled me all along. You said it was spies, saboteurs. You said we'd catch them!
(The MASTER stands in anger.)
MASTER: Look, if I had talked to you about sea monsters, would you have believed me?
TRENCHARD: I've risked everything to help you - and you've lied to me.
MASTER: I had to lie. Now sit down, Trenchard. Sit down and listen to me.
(TRENCHARD stops pacing and does as the MASTER says.)
TRENCHARD: I don't know how you can be so calm.
MASTER: Now listen, that creature that you saw is one of a race of intelligent reptiles that has a deadly hatred of mankind. Now somehow, they've
established themselves in the sea, but now...they intend to emerge and conquer the Earth!
(A look of both incredulity and shock appears on the gullible TRENCHARD'S face. He jumps up.)
TRENCHARD: What, we...we must warn the authorities at once!
MASTER: No, no. Premature action would ruin everything.
TRENCHARD: What else can we do?
MASTER: Wait until this device of mine is perfected, and then tell the authorities.
5: EXT. CASTLE GROUNDS
(The DOCTOR and JO emerge from woodland in the castle grounds and start to run across a hill towards a large bush. The DOCTOR hears the distant voices of
searching guards. He grabs JO and they rush into cover behind the bush.)
DOCTOR: Still! Keep still!
(Two mimimokes, filled with armed guards, and another guard on horseback comes over the brow of the hill. They charge down but, not having seen the two
fugitives, move off to one side. The DOCTOR and JO watch them go.)
DOCTOR: We've got to get back to Captain Hart. Come on.
(They move off.)
6: INT. CASTLE. MASTER'S ROOM
(TRENCHARD comes into the MASTER'S room. He is working on his device again.)
TRENCHARD: They're not in the beach sector. We've completely lost track of them.
MASTER: (Angrily.) Trenchard, if they reach the naval base...!
TRENCHARD: (Interrupts.) Exactly - they'll tell Hart everything.
MASTER: Mind you, there's a good chance that he won't believe them, of course.
TRENCHARD: But suppose he does? Suppose he turns up here again?
MASTER: Refuse to admit him.
TRENCHARD: (Incredulous.) Wha...don't be ridiculous!
MASTER: (Patiently.) Trenchard, you are running a top security establishment here. Your only responsibility is to the government.
TRENCHARD: Oh, what about the Doctor? He'll report to UNIT - they can go to the government.
MASTER: Now look, you must trust me a little longer. I assure you...all your troubles will soon be over.
(The submarine is once more on the move through the depths of the sea.)
8: INT. SUBMARINE CONTROL ROOM
(Within, RIDGEWAY makes an adjustment to a transparent sea chart similar to the one in HART'S office.)
RATING: (OOV: Over tannoy.) Aft end, land space, dry___, sir.
(He then crosses the room, past a dubious looking C.P.O SUMMERS to where the SEA DEVIL stands over a map table with MITCHELL. There is an air of uneasy calm
in the room as they move onwards under their new "commander". The SEA DEVIL grabs hold of RIDGEWAY'S arm and places it down on the map table so that
his finger points to the sea fort on the chart.)
LT. COMMANDER MITCHELL: Why there?
COMMANDER RIDGEWAY: Ask green gilbert!
LT. COMMANDER MITCHELL: (To the SEA DEVIL, cheerfully.) All right, old man. Get you there in no time! (To RIDGEWAY.) Er, sir, shall
we...take a look at the pressure gauge, sir?
(RIDGEWAY smiles and nods. MITCHELL moves off as RIDGEWAY speaks to the SEA DEVIL.)
COMMANDER RIDGEWAY: If you'll excuse me one moment?
(RIDGEWAY joins MITCHELL on the other side of the room. They speak quietly.)
LT. COMMANDER MITCHELL: Sir, shouldn't we try and jump them?
COMMANDER RIDGEWAY: No.
LT. COMMANDER MITCHELL: You mean we're going to do nothing at all?
COMMANDER RIDGEWAY: Sooner or later, these things are gonna return to their base. I want to know where that is. (Loudly.) Starboard twenty, number
9: INT. NAVAL BASE. CAPTAIN HART'S OFFICE (NIGHT)
(Night has fallen. The DOCTOR and JO have reached the safety of HMS Seaspite and are sat in HART'S office. JO has a coat draped over her shoulders as she
drinks out of a hot mug whilst the DOCTOR drinks a glass of spirits. HART slams his desk, gets up and paces his office.)
CAPTAIN HART: I'm sorry if I seem to be repeating myself, Doctor, but I don't believe a word of it!
DOCTOR: Well, I can assure you we didn't walk ten miles across open countryside just to tell you fairy stories.
CAPTAIN HART: (Scoffing.) Monsters coming out of the sea!
JO: But it's different this time! Everybody saw it - Trenchard and the guards.
CAPTAIN HART: And you think Trenchard will confirm your story?
DOCTOR: I doubt it. The Master's got some sort of hold over him.
JO: The Doctor's seen these creatures before.
CAPTAIN HART: Oh, I'm quite sure he has, Miss Grant.
JO: In some caves in Derbyshire. You see, they want to take over the Earth...
CAPTAIN HART: Oh, really, Miss Grant, if you think for one moment I'm going to believe...
JO: ...well, re-take if you like, and what they're going to do is...
DOCTOR: (Interrupts.) All right, Jo, all right, all right. Let me deal with the explanations. (To HART.) Look, it's like this...
(JANE BLYTHE enters with a plate of small sandwiches and goes up to JO.)
3RD OFFICER JANE BLYTHE: Only cheese, I'm afraid. The best the steward could do.
(She gives JO the plate.)
JO: Oh, that's super. Thanks very much.
(The DOCTOR snatches it from her.)
DOCTOR: For heaven's sakes, Jo. What do you think this is - a picnic?
(JO rolls her eyes to heaven at JANE and puts her chin in her hands as the DOCTOR turns back to HART.)
DOCTOR: All right, well let's forget about the Sea Devils. What about Trenchard taget...trying to take us prisoners then?
(He unthinkingly pops a sandwich in his mouth and starts to munch.)
CAPTAIN HART: Well, I only have your word for that, haven't I?
DOCTOR: All right, what about the theft of your electronic spares? Surely you'll agree that happened?
(The DOCTOR puts a second sandwich in his mouth.)
CAPTAIN HART: Since I was here at the time, yes.
JO: The Master stole those parts to make his calling device, and...
CAPTAIN HART: (Interrupts.) His what?!
DOCTOR: Well, he's developed some way of communicating with them. Mm, probably, mm, ultra-high frequency sonic beam.
(He eats a third sandwich and indicates with the plate to HART.)
DOCTOR: These are rather good, want one?
CAPTAIN HART: (Impatiently.) No, thank you.
DOCTOR: (To BLYTHE.) Sandwich?
3RD OFFICER JANE BLYTHE: Thank you.
(She takes the fourth and final sandwich.)
(The DOCTOR sees that he is now holding an empty plate.)
DOCTOR: Oh, I'm so sorry.
(He says this with little feeling or sincerity and passes her the empty plate. The phone rings at BLYTHE'S desk and she answers it.)
3RD OFFICER JANE BLYTHE: (Into phone.) Captain Hart's office?
(She listens, but sounds disappointed with her reply.)
3RD OFFICER JANE BLYTHE: (Into phone.) Oh, I see. (Listens.) Yes, yes, I'll tell him. (To HART.) They've had to abandon the
search, sir. They'll start again at first light.
CAPTAIN HART: Very well.
3RD OFFICER JANE BLYTHE: (To JO.) I'll get you some more sandwiches.
JO: Thanks very much.
DOCTOR: How overdue is the submarine?
CAPTAIN HART: Four hours.
DOCTOR: It should never have been sent, you know? They were bound to presume it was hostile.
CAPTAIN HART: (Snaps.) Kindly leave the naval side of the operation to me, Doctor!
DOCTOR: Captain Hart, you are dealing with situation completely outside of your own experience. And if you won't let me help you...
CAPTAIN HART: (Angrily.) All right then, Doctor!
(HART sighs and realises that the DOCTOR is right. He calms down.)
CAPTAIN HART: What do you want me to do?
DOCTOR: Well, the key to this whole situation is at the castle...
(Suddenly, BOWMAN pops his round the door to the radio room.)
LDG. TELEGRAPHIST BOWMAN: Sir, I think we've got something.
(He moves back into the radio room and the others follow.)
10: INT. NAVAL BASE. RADIO ROOM (NIGHT)
CAPTAIN HART: Where?
(BOWMAN, back at his station, points a place on a radar screen. At the centre of the screen is an outline of the island.)
LDG. TELEGRAPHIST BOWMAN: There, sir. Contact bearing two-seven-zero. Range, twenty thousand yards. Heading zero-four-seven.
JO: The submarine?
CAPTAIN HART: Could be.
LDG. TELEGRAPHIST BOWMAN: I think it must be, sir.
(The DOCTOR also points at the screen.)
DOCTOR: You see where the thing's heading - that beach for castle! (To HART.) Perhaps you'll believe me now.
(The CAPTAIN looks slightly sheepish.)
11: INT. CASTLE. MASTER'S ROOM (NIGHT)
(The MASTER is working again on his device. Another sound is coming from it - a sound rather like a speeded up signal. The MASTER smiles and starts to tap on
an eight digit keyboard, resulting in a different signalling sound. He flicks a switch and the first signal sound starts to be heard again. The MASTER listens
to this intently, still smiling slightly. He flicks the switch back and is starting to reply again when TRENCHARD comes in unannounced.)
TRENCHARD: That thing working all right?
(The MASTER hastily switches the device off.)
MASTER: It, erm, still needs a few minor adjustments, that's all.
TRENCHARD: Look, I've been giving...some thought to all this. It's going to be a...an enormous job coping with these creatures. We must give the
authorities all the notice we can.
(The device suddenly bursts into life with the receiving signal. The MASTER hastily pulls a wire out of the back of the machine.)
TRENCHARD: What was that?
MASTER: Just random feedback. It's nothing important.
TRENCHARD: Sounded like some sort of message.
MASTER: (Wearily.) Look, Trenchard, I am trying to carry out a very difficult and complex task here, and...I can't work if I'm being continually
(TRENCHARD looks down at the MASTER as if he really sees the man for what he is for the first time.)
TRENCHARD: I'm terribly sorry, old chap. I'll leave you to it.
MASTER: Thank you.
(TRENCHARD goes back to the door and looks back.)
(He goes out. The MASTER plugs the wire back in and the device bursts into life again. The signals get even more frantic and tone as the MASTER smiles
12: EXT. BEACH (NIGHT)
(In the semi-darkness, a group of six SEA DEVILS make their way out of the water and up onto the beach. Further out to sea, another six of creatures rise up
out of the water.)
13: INT. CASTLE. GOVERNOR'S OFFICE (NIGHT)
(TRENCHARD drums his fingers on his desk as he makes an urgent telephone call...)
TRENCHARD: (Into phone.) I tell you I must speak to the minister. It's most important. (He listens.) Mmm? Well when do you expect him
back? (Listens.) No, I can't tell you what's wrong. The security of the nation is at risk. (Listens.) Oh, very well, I'll...I'll hold on, but
14: INT. CASTLE. PASSAGE (NIGHT)
(A castle guard walks down a flight of steps in a passage in the castle. He reaches a locked door and starts to get his keys out of his pocket. He fails to
see the SEA DEVIL that comes up behind him and pulls his head back, snapping his neck.)
15: INT. CASTLE. GOVERNOR'S OFFICE (NIGHT)
TRENCHARD: (Into phone.) No, it can't wait till the morning. (He listens.) Oh, you'll have to interrupt his meeting. This is a matter of
national urgency. (Listens.) Oh, very well, as soon as he's free then. But if there's any unnecessary delay, believe me, you'll answer for it.
(He puts the phone down and goes over to the monitor. He switches it on and watches the MASTER as he intently carries on signalling. He switches it off and
picks up one of the phones next to the monitor.)
TRENCHARD: (Into phone.) Guard?
(He receives no reply and taps the phone several times.)
16: INT. CASTLE. PASSAGE (NIGHT)
(Elsewhere in the castle, a wall phone falls to the floor as it is ripped from its mounting. A castle guard falls down next to it. A SEA DEVIL walks past the
body and up a set of steps.)
17: INT. CASTLE. GOVERNOR'S OFFICE (NIGHT)
(TRENCHARD gives up on the phone and goes back to his desk. He looks intensely worried. Sat in his chair, he rummages in his pocket and pulls out a key with
which he unlocks a drawer on his desk. From this he takes an old service revolver. He checks that it is loaded and looks at it with determination...)
18: INT. CASTLE. PASSAGE OUTSIDE MASTER'S ROOM (NIGHT)
(Two castle guards walk down the steps near to the MASTER'S room and round a corner. They see two SEA DEVILS in front of them. As their jaws drop in shock,
one of the guards swiftly reaches for a wall alarm and presses the button. The ring of the bell fills the castle.)
19: CASTLE. PASSAGE (NIGHT)
(Two armed guards run down a passage, reacting to the alarm.)
20: CASTLE. ANOTHER PASSAGE (NIGHT)
(Two SEA DEVILS carefully make their way through the castle, pausing to check through open archways.)
21: CASTLE. PASSAGE (NIGHT)
(His revolver is his hand, TRENCHARD runs through the castle.)
22: CASTLE. ANOTHER PASSAGE (NIGHT)
(Two guards run round a corner and are confronted by two armed SEA DEVILS. Shots are fired between the two parties but the result is a foregone conclusion
and the two guards fall dead as the reptiles move on.)
23: INT. CASTLE. PASSAGE OUTSIDE MASTER'S ROOM (NIGHT)
(CASTLE GUARD DREW crouches down in a defensive position outside the MASTER'S room, firing away as the SEA DEVILS move off. TRENCHARD runs up. They shout
over the continuing sound of the alarm bell.)
TRENCHARD: What's happening, man?
CASTLE GUARD DREW: (Panicking.) They're all over the place, sir! They killed most of the lads!
TRENCHARD: Who? Who's attacking us?
CASTLE GUARD DREW: Well, those lizards, sir. Like that thing we saw on the beach. Come on, sir! They were after me!
TRENCHARD: Pull yourself together, man. Have you sent for help?
CASTLE GUARD DREW: But it's no good, sir!
TRENCHARD: There's a direct line to Whitehall in my office - use that.
CASTLE GUARD DREW: Why can't you, sir?
TRENCHARD: I shall attend to the security of my prisoner. Go on, man - move!
(DREW moves off and TRENCHARD turns to face three SEA DEVILS who raise their weapons. TRENCHARD balances his revolver across his left forearm and starts
firing. One of the SEA DEVILS clutches its chest as TRENCHARD continues to pump away bullets.)
24: INT. CASTLE. MASTER'S ROOM (NIGHT)
(The MASTER continues to tap out a signal on his device. Satisfied, he switches it off and turns and faces the door as it opens to admit three SEA DEVILS.
Behind them in the passage can be seen the fallen body of TRENCHARD, his usefulness now over. The SEA DEVILS nod at each other and the MASTER smiles as his
captivity comes to an end.)
25: INT. NAVAL BASE. RADIO ROOM (NIGHT)
(BOWMAN taps out a Morse code signal but then gives up. On the radar screen, the blip from the submarine is away from the island again.)
LDG. TELEGRAPHIST BOWMAN: No, it's no good, sir - nothing.
JO: (To HART.) Well, if that thing was the submarine, why don't they answer your signals?
DOCTOR: Perhaps they can't.
CAPTAIN HART: (To BLYTHE.) Tell the search coordinator to check that area immediately. It'll be light soon.
3RD OFFICER JANE BLYTHE: Sir.
LDG. TELEGRAPHIST BOWMAN: Sir - contact fading!
CAPTAIN HART: What?!
(He rushes to the radar screen only to see the blip fading.)
DOCTOR: Captain Hart, we've got to find out what's happening at that castle.
LDG. TELEGRAPHIST BOWMAN: Contact lost.
CAPTAIN HART: (To BLYTHE.) I want an armed party and two Landrovers at the main gate in four minutes flat. (Urgently.) Doctor?
(HART rushes out followed by the DOCTOR and JO. BLYTHE picks up a phone to pass on the order.)
26: EXT. CASTLE
(It is now light. Two Navy Landrovers screech up to the castle entrance and stop. HART gets out of one of the vehicles and the DOCTOR and JO out of the
other. Numerous armed ratings also get out of the two vehicles. The DOCTOR and Jo immediately run through the un-guarded entrance. HART turns to his ratings.)
CAPTAIN HART: Come on! Follow me!
27: INT. CASTLE. PASSAGE
(The DOCTOR and JO, making their way to the MASTER'S room, see a dead guard splayed out on the floor. The DOCTOR stoops to examine him. HART passes him and
looks down a side passage.)
CAPTAIN HART: Doctor!
(HART runs off to what he has seen and the DOCTOR and JO follow.)
28: INT. CASTLE. PASSAGE OUTSIDE MASTER'S ROOM
(HART runs down the short flight of steps to the body of TRENCHARD. A quick examination confirms the worst as the DOCTOR, JO and some ratings catch up. JO
looks distraught. HART is shocked by his friends fate.)
CAPTAIN HART: I...don't understand why.
DOCTOR: The Master had no further use for him - that's why.
CAPTAIN HART: But why did he help the Master in the first place?
DOCTOR: What would you say was Trenchard's strongest characteristic?
CAPTAIN HART: Oh, I don't know - patriotism, I suppose.
DOCTOR: Exactly. And the Master used that patriotism as a weapon.
29: INT. NAVAL BASE. RADIO ROOM (NIGHT)
(BOWMAN is writing down a message as BLYTHE brings in a mug.)
3RD OFFICER JANE BLYTHE: I've bought you some kai.
(BOWMAN continues to take down the message as JANE watches over his shoulder. Finally, BOWMAN speaks into a hand microphone.)
LDG. TELEGRAPHIST BOWMAN: Roger, search force. Over and out. (To BLYTHE.) Er, did you get through to Captain Hart?
3RD OFFICER JANE BLYTHE: I telephoned the castle but they've already left.
LDG. TELEGRAPHIST BOWMAN: Well, they're definitely getting an echo and the object's moving.
3RD OFFICER JANE BLYTHE: I see.
(At that moment, HART, the DOCTOR and JO come back in.)
CAPTAIN HART: What is it, Bowman? Have they re-established contact?
LDG. TELEGRAPHIST BOWMAN: It's a message from one of the search vessels, sir. They are getting an echo.
DOCTOR: The submarine?
LDG. TELEGRAPHIST BOWMAN: Yes, it's moving towards the fort now. Er, moving at about thirty knots.
CAPTAIN HART: Depth?
LDG. TELEGRAPHIST BOWMAN: Steady at one-five-zero feet.
DOCTOR: The fort. Look, Captain Hart, can you lay on a diving vessel?
CAPTAIN HART: Yes, the "Reclaim"s standing by on the search, but why?
DOCTOR: I want to inspect the sea bed at the base of that fort.
(HART looks slightly surprised at this request.)
30: EXT. SEA
(A small launch boat moves further away from the shore. On it are the DOCTOR, JO and HART. One of the ratings signals with an oar to a large diving vessel
that they are approaching - "HMS Reclaim". The launch pulls alongside the ship and its rope ladder. On board the "Reclaim", ratings secure
the launch and JO is the first to climb the rope ladder.)
31: EXT. "HMS RECLAIM". MAIN DECK
(JO climbs on board followed by the DOCTOR. As HART starts to climb the rope ladder, three ratings pipe them aboard. The DOCTOR takes JO to a hatch that
32: INT. "HMS RECLAIM". CONTROL ROOM
(Within the control room, JO helps the DOCTOR to take his cloak off and then to put on an anorak as HART joins them and speaks to LT. COMMANDER WATTS.)
CAPTAIN HART: All pre-dive checks completed?
LT. COMMANDER WATTS: Yes sir.
CAPTAIN HART: Doctor, are you quite sure you want to go through with this?
DOCTOR: Yes, positive.
CAPTAIN HART: (To WATTS.) Ready to lower the observation chamber?
LT. COMMANDER WATTS: Yes, sir. The crew is standing by. We'll send a man armed with him.
CAPTAIN HART: Good.
DOCTOR: If you don't mind, I'd rather go down on my own.
CAPTAIN HART: Well, I presume you're a trained diver in addition to your other accomplishments then, Doctor?
DOCTOR: Naturally. What's more, I know these creatures. I've encountered them before so I know what I'm looking for.
CAPTAIN HART: (To WATTS.) All right, carry on.
LT. COMMANDER WATTS: Aye aye, sir.
(WATTS climbs up to the deck to carry on with preparations as JO speaks quietly to the DOCTOR.)
DOCTOR: What is it, Jo?
JO: Is it really necessary for you to go down?
(He lifts her chin up.)
DOCTOR: How else am I going to make contact?
CAPTAIN HART: Doctor?
(CAPTAIN HART is waiting for them. The DOCTOR takes the ladder to the deck, followed by JO.)
33: EXT. "HMS RECLAIM". MAIN DECK
(The DOCTOR comes to the deck. A large metal cylindrical diving bell is there, attended to by white polo-necked sailors who hold the device in place under
its winch cable. The bell is ringed on the outside by oxygen cylinders. The DOCTOR glances at it, then HART shakes his hand.)
CAPTAIN HART: Well, good luck, Doctor.
DOCTOR: Thank you, Captain Hart.
(The DOCTOR gently pats JO'S face and then steps under the diving bell, climbing up into the structure through a hatch in the bottom.)
34: INT. DIVING BELL
(The DOCTOR stands in the bottom as a C.P.O. pops his head up through the hatch.)
C.P.O: Everything okay, sir?
DOCTOR: Yes, thank you, Chief.
C.P.O: Very good.
(The C.P.O. makes a small adjustment...)
35: EXT. "HMS RECLAIM". MAIN DECK
(...and then steps out, giving a thumbs up sign to LT. COMMANDER WATTS.)
LT. COMMANDER WATTS: Test the links.
(The orders are shouted on...)
NAVAL OFFICER: ___!
(The ratings make checks on the bell.)
NAVAL OFFICER: ____ then!
(The winch crane starts to lift the bell.)
36: INT. DIVING BELL
(Within the bell, the DOCTOR sways on his feet as the device rocks.)
37: EXT. "HMS RECLAIM". MAIN DECK
(HART and JO watch as the bell, held in the air, is pushed over the edge of the hull.)
NAVAL OFFICER: Down drop___!
(WATTS shouts a command to the men operating the winch.)
LT. COMMANDER WATTS: ___ the links. Carry on lowering.
(The steel cables play out and the bell plunges into the water, creating a large disturbance on the surface.)
38: INT. DIVING BELL
(The movement of the water is all that can be heard in the bell.)
39: EXT. "HMS RECLAIM". MAIN DECK
(HART indicates to JO to go with him back below deck. They walk back to the hatch.)
RATING: Twelve feet.
NAVAL OFFICER: Carry on lowering.
(The cables heading into the water are now the only sign of the bell.)
40: INT. "HMS RECLAIM". CONTROL ROOM
(HART climbs back into the control room followed by JO. LT. COMMANDER WATTS is there ahead of them standing next to a control bank manned by two ratings. Two
monitors are on the bank, both of which shows a view of the DOCTOR inside the bell.)
CAPTAIN HART: Let me speak to him.
(The CAPTAIN takes a microphone from the WATTS.)
CAPTAIN HART: (Into microphone.) How's it going, Doctor?
DOCTOR: (On monitor.) Splendid, thank you. A most interesting trip.
CAPTAIN HART: (Into microphone.) You'll reach sea-bed in a few minutes. Tell us immediately if anything goes wrong.
DOCTOR: (On monitor.) Don't worry. I'll be all right.
41: EXT. "HMS RECLAIM". MAIN DECK
(The cable winch stops turning.)
42: INT. "HMS RECLAIM". CONTROL ROOM
CAPTAIN HART: (Into microphone.) You have reached sea-bed.
DOCTOR: (On monitor.) Right.
CAPTAIN HART: (Into microphone.) Are you all right, Doctor?
43: INT. DIVING BELL
DOCTOR: Yes, I'm fine thank you.
(He looks out of small porthole window into the murky green beyond.)
DOCTOR: Hang on a minute!
(He steps back. A SEA DEVIL looks through the window into the bell...)
44: INT. "HMS RECLAIM". CONTROL ROOM
CAPTAIN HART: (Into microphone.) Are you all right, Doctor? Shall we bring you up?
DOCTOR: (On monitor.) Definitely not! I think I've just...
(The sound is suddenly replaced by static and at the same time the image on the monitors cut out.)
CAPTAIN HART: Bring him up!
(HART rushes out followed by JO. WATTS starts shouting orders.)
LT. COMMANDER WATTS: Start winches! Hoist SCC!
45: EXT. "HMS RECLAIM". MAIN DECK
(The winch is frantically turning as HART and JO run up back onto deck and to the ship's side. They watch anxiously as the surface of the water is disturbed
by the rising diving bell.)
NAVAL OFFICER: ___!
(The bell is pulled clear of the water and into the air. Further orders are shouted and the crane pulls the bell over the deck where it is pulled down by
several ratings. JO looks to HART who walks towards the bell and ducks under. He emerges after a moment and walks solemnly towards her. She reads the look in
his face and goes towards the bell herself. Ducking under, she carefully stands up into the interior of the bell.)
46: INT. DIVING BELL
(JO sees that it is totally empty...)
Lt. Commander Mitchell
3rd Officer Jane Blythe
Ldg. Telegraphist Bowman
Lt. Commander Watts
Castle Guard Drew
The BBC wish to acknowledge
the help given to them by the
Royal Navy in the making
of this programme.
Title Music by
and BBC Radiophonic Workshop
Incidental Music by
BBC Radiophonic Workshop
Special Sounds by