1: INT. CASTLE. PASSAGE OUTSIDE MASTER'S ROOM
(The DOCTOR is stood to one side of the doorway, his back pressed against a wall. He kicks out a long leg, and with it, the gun from the MASTER'S hand. The
MASTER reaches on the wall behind him where there is a small rack of fencing swords and takes one.)
DOCTOR: Like that is it?
(He grabs another sword from a similar rack. The two immediately cross swords and battle commences. There is a furious clash of metal but both men prove
expert in the art. They reach the point where the two blades are pressed against each other in a trial of strength but the DOCTOR wins and pushes his opponent
back onto the floor and then uses the diversion to dive through an archway behind a curtain. The MASTER recovers and starts to slash at the curtain. The DOCTOR
comes out from another archway and nonchalantly watches the MASTER'S efforts.)
DOCTOR: I wouldn't do that if I were you. That's government property.
(The MASTER spins round in anger. The two men clash swords again. This time, the MASTER grabs the DOCTOR'S fencing wrist and pushes him back into the cell.)
2: INT. CASTLE. MASTER'S ROOM
(The DOCTOR lands on the table in the centre of the room. He manages to dodge out of the way before the MASTER'S sword comes crashing down and dodges back
the other way before the sword comes down again. He then recovers his feet. The DOCTOR then crashes his sword down and knocks the MASTER'S sword from his hand.
The DOCTOR holds his own sword against the MASTER'S chest, sits on the table and grabs a sandwich from a plate with his free hand.)
DOCTOR: I always find that...violent exercise makes me hungry. Don't you agree?
MASTER: Then you'd better enjoy your meal, because it might be your last!
DOCTOR: Oh, you think so?
(The DOCTOR, confident of having the better skills, uses his own sword to throw the MASTER'S sword back into his opponent's hands. There is another furious
clash which sends the DOCTOR back and falling into the chair. The MASTER rushes at his downed adversary and the two men grab sword wrists.)
MASTER: You're good, Doctor, but you're not good enough!
DOCTOR: Ah, but you haven't seen the quality of my footwork yet!
(The DOCTOR brings up his left leg and uses it to push the MASTER back, over the table, and falling badly to the floor. He grimaces in pain as the DOCTOR
gets to his feet, holding both the swords. He looks down at the MASTER and tuts.)
DOCTOR: How many times have I told you? Violence'll never get you anywhere.
(He turns his back on the MASTER, who gets to his feet, takes out the concealed dagger that he stole from the guard and throws it at the DOCTOR'S back just
as TRENCHARD walks in the room with an armed guard. The knife thuds into the doorframe next to the DOCTOR'S head.)
TRENCHARD: What's going on here?!
(TRENCHARD looks from the MASTER to the DOCTOR for an answer. The MASTER is the first to speak and take the initiative.)
MASTER: I was defending myself. (Points.) This man came here to kill me.
TRENCHARD: (To the DOCTOR.) Be so good as to explain yourself, Doctor.
DOCTOR: Only a complete fool would listen to such an accusation! Though I suppose in your case...?
TRENCHARD: (Angrily.) Don't speak to me like that! I shall have a full enquiry into the whole thing. Meanwhile, consider yourself under arrest. (To
the guard.) Take him to my office immediately.
DOCTOR: Oh, don't be absurd, man!
TRENCHARD: (To the guard.) You heard me - take him away.
(The guard approaches the DOCTOR with his pistol raised. The DOCTOR throws down the two swords and heads for the door, throwing some acidic comments at
TRENCHARD as he goes.)
DOCTOR: If you must continue with this ridiculous charade! Only take care not to lose him this time, won't you?
(TRENCHARD signals to the guard who follows the DOCTOR from the room. TRENCHARD shuts the door after them.)
TRENCHARD: What are you going to do - kill him? Though I warn you...
MASTER: (Interrupts.) I told you - I was defending myself. The point is, what are you going to do about it?
TRENCHARD: This whole thing's getting out of hand, I...I just don't know.
MASTER: Well then, I'll tell you - keep the Doctor here a prisoner. You have no alternative. By the way, is the girl with him?
TRENCHARD: Yeah, she was going to leave, but I had her stopped at the main entrance.
MASTER: Good. Then there's nothing to worry about.
(He walks off to his bathroom, leaving an astonished TRENCHARD behind.)
3: EXT. CASTLE
(JO walks out of the main entrance of the castle and up to the jeep. CASTLE GUARD BARCLAY has the keys in his hand and JO puts her hand out for them but he
puts them in his pocket.)
JO: The keys! I've got to get back to the naval base - it's urgent!
CASTLE GUARD BARCLAY: Sorry Miss, orders.
(He speaks to another guard stood nearby.)
CASTLE GUARD BARCLAY: Take her back inside.
(JO thrusts an elbow into his ribs and then throws him at his colleague. As they both fall to the ground in a heap, she runs off.)
CASTLE GUARD BARCLAY: (Shouts.) Well, don't just sit there - get after her!
(The guard runs after her, closely followed by BARCLAY.)
4: INT. CASTLE. GOVERNOR'S OFFICE
(A bored DOCTOR is sat on the edge of the desk in TRENCHARD'S office. He speaks to the guard.)
DOCTOR: Have you any idea why Colonel Trenchard is taking orders from the Master?
(The guard stares ahead, showing no sign of having heard the question. The DOCTOR gets up and walks over to him.)
DOCTOR: Look man, I'm talking to you.
(He snaps his fingers in front of the guard's eyes. The guard gives him a short but telling look and then looks away again. The DOCTOR gives up.)
DOCTOR: Very well.
(He walks away from the guard as TRENCHARD enters the room.)
TRENCHARD: Now then, Doctor, I'm afraid you're in very serious trouble.
(He sits at his desk.)
TRENCHARD: I've been giving this matter some thought. I'm going to hold you here until the whole thing's cleared up.
DOCTOR: Is that what the Master told you to say?
TRENCHARD: You've attacked a government employee, and tried to harm a prisoner under my care and protection.
DOCTOR: I've done no such thing. The Master knocked that guard out himself, as you very well know.
(TRENCHARD holds up the DOCTOR'S UNIT pass.)
TRENCHARD: And as for this UNIT pass of yours, I believe it's a forgery.
(He rips the pass up.)
DOCTOR: That's absolute rubbish! Anybody at UNIT headquarters will vouch for me, if you'll permit me to use the telephone.
(The DOCTOR starts to pick up the receiver but TRENCHARD puts his hand down over his, replacing the receiver back in the cradle.)
TRENCHARD: Prisoners are not allowed to make telephone calls.
DOCTOR: Colonel Trenchard, why are you allowing the Master to use you like this?
TRENCHARD: (To the guard.) All right, take him away.
DOCTOR: Look, you're jeopardising your entire career!
TRENCHARD: I have nothing further to say to you. The interview is over.
DOCTOR: Didn't anybody else warn you about the Master? Whatever he's told you, it's all lies!
TRENCHARD: You'll be well treated as long as you behave yourself.
DOCTOR: You really think you can keep me here?
(TRENCHARD looks intently at the DOCTOR.)
TRENCHARD: This is no ordinary prison. If you attempt to escape, the guards will shoot to kill.
DOCTOR: (Unperturbed.) I see. Thank you. Thank you very much.
(The guard opens the door and he and the DOCTOR leave. TRENCHARD'S phone rings.)
TRENCHARD: (Into phone.) Trenchard. (He listens.) What? (Listens.) Then find her - now!
5: EXT. CASTLE GROUNDS
(JO hides behind some shrubbery. With the castle in the background, she watches as a patrol of cloaked guards, rifles in hand, run past. Once they have gone,
she heads back towards the castle.)
6: INT. CASTLE. MASTER'S ROOM
(The MASTER is working on the equipment stolen from the naval base. He has a magnifying glass on a stand and is soldering a circuit as TRENCHARD walks into
TRENCHARD: I've got him under lock and key.
MASTER: Just a minute.
(The MASTER continues to make minute adjustments while TRENCHARD looks over his shoulder in fascination.)
MASTER: Ah! Under lock and key, eh?
TRENCHARD: That's right.
MASTER: The girl too?
TRENCHARD: What a fascinating contraption!
(The MASTER looks up from his work.)
MASTER: I asked about the girl.
TRENCHARD: Oh, little...mishap on the way back here. She...got away.
(The MASTER slams the soldering iron down and stares angrily at TRENCHARD.)
MASTER: And by now is, no doubt, running straight back to the naval base!
TRENCHARD: Oh, no fear of that. She'll never get out of the grounds. Guards'll pick her up at any moment.
MASTER: Well, I hope that you're right.
TRENCHARD: Oh, no doubt about it.
MASTER: Nevertheless, we need to work very fast from now on. Trenchard, I need your fullest cooperation. Tell me, where is the Doctor?
TRENCHARD: In the security cell.
MASTER: Send him to me, will you? I want a word with him.
(The MASTER returns to his work. TRENCHARD stares at the MASTER, seeing that what little authority he had is slipping away. Seeing that his instruction is
not being carried out, the MASTER stares at the governor. TRENCHARD gives up, leaves the room and the MASTER returns to his task.)
7: INT. NAVAL BASE. CAPTAIN HART'S OFFICE
(A young bearded naval COMMANDER stands in HART'S office looking at a naval chart. HART points to the central point within the triangle formed by the last
known position of the three sunken ships.)
CAPTAIN HART: I can't give you much to go on, I'm afraid, but I believe there's something down there. Your submarine's fitted with the new
experimental sonar. It'll give you a chance to try it out.
COMMANDER RIDGEWAY: What are we looking for, sir?
CAPTAIN HART: I wish I knew. The man we took off the fort was babbling something about "Sea Devils".
COMMANDER RIDGEWAY: (Smiles.) Oh, don't you think this is getting a bit out of hand, sir? Ships have vanished at sea before.
CAPTAIN HART: (Coldly.) I'm well aware of that. To be exact, seventy in the last ten years. But we've lost three, all in the same area, in the
last few weeks.
(The smile doesn't leave RIDGEWAY'S face.)
COMMANDER RIDGEWAY: We'll do what we can to find your Sea Devils, sir.
CAPTAIN HART: I want you to signal me a full report the moment you resurface.
COMMANDER RIDGEWAY: Yes sir.
(RIDGEWAY collects the chart and his cap.)
CAPTAIN HART: All right, carry on.
COMMANDER RIDGEWAY: Yes sir.
(He heads for the door which has been opened by JANE BLYTHE.)
CAPTAIN HART: And good luck.
COMMANDER RIDGEWAY: Thank you, sir.
(He nods at JANE and leaves. BLYTHE crosses to HART, slightly worried.)
3RD OFFICER JANE BLYTHE: Excuse me, sir?
CAPTAIN HART: Yes?
3RD OFFICER JANE BLYTHE: I was just wondering about Miss Grant and the Doctor. Shouldn't they be back by now?
8: INT. CASTLE. MASTER'S ROOM
(TRENCHARD brings a handcuffed DOCTOR into the MASTER'S room. A guard follows them.)
TRENCHARD: All right, Doctor. Come along in.
(The MASTER has changed into his own clothes - his dark Nehru suit. The device that the MASTER has been working on seems to be near completion. Roughly boxed
shaped, it is an exposed mass of wires and circuits with what looks to be a transmitter on top.)
MASTER: Ah, Doctor. Good of you to spare me a few moments.
DOCTOR: I hadn't really anything better to do.
MASTER: Yes, time does hang heavy when one is a prisoner.
(He indicates a chair.)
MASTER: Would you care to sit down?
DOCTOR: Thank you.
(The DOCTOR sits. The MASTER frowns at TRENCHARD and nods at the handcuffs.)
TRENCHARD: (To the guard.) Right.
(The guard walks forward and undoes the handcuffs...)
DOCTOR: How very kind of you.
(...but then immediately pinions the DOCTOR'S hands behind his back and relocks the cuffs.)
DOCTOR: How very unkind of you!
TRENCHARD: (To the MASTER.) Right, I'll leave you to have your little chat. There will be a guard outside at all times.
DOCTOR: I'm very relieved to hear it!
(TRENCHARD and the guard leave. The MASTER leans over the DOCTOR.)
MASTER: No doubt, Doctor, you're wondering why I sent for you?
DOCTOR: Your usual childish desire to gloat, perhaps?
MASTER: How much have you told UNIT?
DOCTOR: Everything. I sent them a full report as soon as Miss Grant spotted you at the naval base.
MASTER: And yet you came back here to investigate in person? Interesting.
(The MASTER goes and sits in another chair.)
MASTER: You know, I wonder whether you're telling me the truth.
DOCTOR: Well, you'll find out soon enough.
MASTER: You realise, of course, that I could kill you, here and now?
DOCTOR: And how would you explain that away to Colonel Trenchard? I'm hardly in a position to attack you now, am I?
MASTER: Do you really think I care what Trenchard thinks?
DOCTOR: Whatever you're up to, you still need Trenchard's cooperation. You're still a prisoner here, you know?
MASTER: My dear Doctor, I can walk out of here any time I choose.
DOCTOR: Then why don't you?
MASTER: Because this place makes a good base for my operations.
(The MASTER gets up and places a hand on his newly completed device.)
MASTER: You see, I'm planning to contact our...reptilian friends.
(The DOCTOR sits up, frowning.)
DOCTOR: How do you know about them?
MASTER: Oh, from the Time Lord's files.
DOCTOR: More stolen information?
DOCTOR: Well, why do you want to contact them?
MASTER: Those reptiles, Doctor, were once the rulers of this Earth. And with my help, they can be so again!
9: INT. NAVAL BASE. RADIO ROOM
(RIDGEWAY reports from the submarine by radio.)
COMMANDER RIDGEWAY: (OOV: Over radio.) Entering the specified zone now, sir. About to dive.
CAPTAIN HART: (Into radio.) Very well. Standing by for your report. (To the telegraphist.) Carry on.
(HART leaves the room.)
10: EXT. SEA
(The submarine ploughs through the waters of the sea.)
11: INT. NAVAL BASE. CAPTAIN HART'S OFFICE
(HART returns to his office from the radio room. JANE BLYTHE enters from the corridor with a report that she places on HART'S desk. He walks towards the
transparent wall chart and starts to plot the submarine's position.)
3RD OFFICER JANE BLYTHE: Excuse me, sir?
CAPTAIN HART: Yes, what is it?
3RD OFFICER JANE BLYTHE: (Nervously.) I hope you don't mind, but I telephoned Colonel Trenchard about the UNIT people. He said they'd both gone
back to London.
(HART is still plotting on the chart and not really listening.)
CAPTAIN HART: Oh, I see.
3RD OFFICER JANE BLYTHE: But they didn't bring the Landrover back, sir. Colonel Trenchard said they took a taxi to the quay.
CAPTAIN HART: (Impatiently.) Well, you'd better send someone to collect it.
3RD OFFICER JANE BLYTHE: Y...yes sir, but why take a taxi when they could have used the Landrover and...well...
(Her voice tells off but she now has HART'S attention.)
CAPTAIN HART: Well, go on.
3RD OFFICER JANE BLYTHE: Well, sir, surely they'd have come back here before leaving the island?
(HART is now very interested...)
12: EXT. SEA
(The huge bulk of the submarine sinks beneath the waves...)
13: INT. SUBMARINE CONTROL ROOM
(In the cramped control room of his submarine, RIDGEWAY gives a command to his young number one...)
COMMANDER RIDGEWAY: Keep fifty feet.
LT. COMMANDER MITCHELL: Aye aye, sir.
(MITCHELL crosses to an on-board intercom.)
LT. COMMANDER MITCHELL: Stand by to blow Q.
RATING: (OOV: Over intercom.) Stand by to blow Q.
LT. COMMANDER MITCHELL: Blow Q.
RATING: (OOV: Over intercom.) Blow Q.
COMMANDER RIDGEWAY: Up periscope.
(A periscope comes up from a tube in the centre of the floor. RIDGEWAY goes over to it and pulls down the viewing handles.)
COMMANDER RIDGEWAY: (To MITCHELL.) Right, number one, stand by to start your sonar watch.
LT. COMMANDER MITCHELL: Aye aye, sir. (Unsure.) Er, what are we looking for, sir?
COMMANDER RIDGEWAY: (Smiles.) I don't know. Maybe we'll know when we find it.
LT. COMMANDER MITCHELL: Sir.
14: INT. CASTLE. MASTER'S ROOM
(The DOCTOR is still pinioned in the MASTER'S room.)
DOCTOR: But I still don't see why you want to help them. What can you possibly gain?
MASTER: The pleasure of seeing the human race exterminated, Doctor. The human race of which you are so fond. Believe me, that'll be a reward in itself.
(CASTLE GUARD DREW enters the room.)
CASTLE GUARD DREW: The governor wants to see you, sir.
MASTER: In a moment.
CASTLE GUARD DREW: He wants to see you now, sir.
DOCTOR: (Amused.) Better run along, old chap. You're still a prisoner here, you know.
(The MASTER picks up his device and walks out of the room.)
DOCTOR: You'll never get it off the ground!
(The MASTER gives him a look and leaves. Immediately he has gone, the DOCTOR starts to pull at his handcuffs.)
15: EXT. CASTLE
(A patrol of guards drives round the base of the castle in one of minimokes - rifles raised. They drive past an artillery practice range, failing to see JO
hidden behind the sandbags and the targets. As they go off into the distance, JO runs up the castle wall and tries a large white iron door set into the stone.
It refuses to give way and she moves off to try elsewhere.)
16: INT. CASTLE. GOVERNOR'S OFFICE
(The MASTER enters TRENCHARD'S office, device in hand. The governor comes over from the window, in something of a panic.)
TRENCHARD: Captain Hart's car's been spotted heading for the main gate. He must have guessed something's up. What am I to do?
MASTER: Use your intelligence, Trenchard - bluff him.
17: EXT. CASTLE
(JO rounds a corner of the castle. She looks through a barred window and seeing nothing there, moves onto another window.)
18: INT. CASTLE. MASTER'S ROOM
(She has struck lucky - it is the MASTER'S room with the DOCTOR still inside, trying to find a way out of his bonds. She taps at the window and the DOCTOR
looks up in delight. JO mimes a plan. She waves both hands, points at the cell door, taps her fingers and thumbs together as if to demonstrate talking, circles
her fingers over her watch face and holds up five fingers. She then points at the DOCTOR, the cell door and again mimics talking with her fingers. The DOCTOR
nods, smiles and mouths "All right!" Jo gives a thumbs up and moves away from the window. The DOCTOR looks at the clock on the wall. It shows seven
minutes past two.)
19: EXT. CASTLE
(JO carries on moving round the edge of the castle. She sees a ground level sash window which is slightly open. She pushes it up further and starts to climb
20: INT. CASTLE. INNER COURTYARD
(Inside, she comes through the small room which has the window in the wall and comes out into an inner courtyard. She sees a stone flight of stairs with a
door in the base. She goes through this doorway when she hears a noise above and goes into the interior as a guard starts to come down the steps.)
21: INT. CASTLE PASSAGE
(JO creeps down a corridor.)
22: INT. CASTLE. MASTER'S ROOM
(The DOCTOR checks the clock. It now shows thirteen minutes past. He calls out...)
DOCTOR: Anyone out there?
23: INT. CASTLE. PASSAGE OUTSIDE MASTER'S ROOM
(Outside the room, CASTLE GUARD DREW stands on guard.)
DOCTOR: (OOV: Inside room.) I said, is there anyone out there?
CASTLE GUARD DREW: Please be quiet, sir.
DOCTOR: (OOV: Inside room.) Look, guard, I want to talk to you. (Angrily.) I said I want to talk to you!
(The GUARD enters the room as JO peers round the corner at the top of the steps at the end of the passage.)
24: INT. CASTLE. MASTER'S ROOM
CASTLE GUARD DREW: What's all the noise about, sir?
DOCTOR: How much longer am I going to be kept chained up like this? What...
25: INT. CASTLE. PASSAGE OUTSIDE MASTER'S ROOM
(Outside the room, JO starts to tiptoe down towards the door.)
DOCTOR: (OOV: Inside room.)...about the Geneva convention?
CASTLE GUARD DREW: (OOV: Inside room.) You'll have to stay here until someone tells me different, sir.
DOCTOR: (OOV: Inside room.) What about some food then? I'm sure they didn't tell you to starve me to death.
CASTLE GUARD DREW: (OOV: Inside room.) You'll be fed when the time comes.
(She quietly enters.)
26: INT. CASTLE. MASTER'S ROOM
(The guard has his back to the door. JO sneaks in and hides behind the open door.)
DOCTOR: You tell Colonel Trenchard that I want to see him straight away. He's got no right to keep me here like this!
CASTLE GUARD DREW: Look, sir, you're a lot better off here than in one of the cells, so please be quiet, sir.
(He goes back out, shutting the door behind him. Revealed in her "hiding place", JO gives a wave to the DOCTOR. She goes over to him and looks over
the cuffs. He mouths to her "Screwdriver, over there" and nods at the table where the MASTER has left his tools. JO picks up a couple of screwdrivers
and starts to pick the lock.)
27: INT. CASTLE. GOVERNOR'S OFFICE
(CAPTAIN HART is in TRENCHARD'S office.)
TRENCHARD: There's nothing more I can tell you, old chap. I'm as puzzled as you are. Just called for a taxi and off they went.
CAPTAIN HART: I see. But Miss Grant was sure she'd caught sight of your prisoner at the base.
TRENCHARD: Huh, absolutely ridiculous! This place is totally de...secure. Oh, just take a look at the alarm system.
(TRENCHARD switches on the venetian monitor and a diagram of the castle complex appears.)
CAPTAIN HART: And you see, George, you did drop in on me at exactly the time of the robbery.
(TRENCHARD switches the monitor off.)
TRENCHARD: My dear chap, you're scarcely suggesting that I pinched your wretched material? (Laughs.) Don't understand the stuff. Tried to make myself
a crystal set once, when I was a lad. Never got it to work.
CAPTAIN HART: Well then, would it be possible to see your prisoner?
TRENCHARD: Oh, strictly against the rules. No one can see him without a special pass - completely incommunicado.
CAPTAIN HART: Oh, surely we can stretch the rules, George? This is important.
TRENCHARD: Well, all right, old chap. Seeing it's you. Take a look at him on this.
(He leads the way back to the monitor.)
CAPTAIN HART: Thank you.
(TRENCHARD switches the monitor on again and this time it shows a view of the MASTER sat in a different cell to his usual one.)
TRENCHARD: There you are.
CAPTAIN HART: Well, I suppose the Doctor must have been wrong.
TRENCHARD: Of course he was. Seemed a pretty cranky sort of fellow to me.
CAPTAIN HART: I...
TRENCHARD: Time for a quick one?
CAPTAIN HART: No, I should be going, George.
TRENCHARD: Yes, yes, of course, I...realise how busy you are.
(TRENCHARD passes HART his cap and swagger stick.)
CAPTAIN HART: Well, thank you. (Hesitantly.) Look here, George...
TRENCHARD: (Meaningfully.) The guard'll see you out.
CAPTAIN HART: Yes, thank you.
(HART walks out...)
TRENCHARD: Bye, John.
(...and TRENCHARD shuts the door after him.)
(The submarine moves through the depths of the channel.)
29: INT. SUBMARINE CONTROL ROOM
(MITCHELL watches LDG. SEAMAN LOVELL operating their specialised equipment as RIDGEWAY walks up. The equipment gives out the characteristic "ping"
of a sonar.)
COMMANDER RIDGEWAY: Anything, number one?
LT. COMMANDER MITCHELL: Er, no, sir. Nothing...nothing at all.
COMMANDER RIDGEWAY: Keep trying, old chap.
LT. COMMANDER MITCHELL: Sir.
(RIDGEWAY walks away. MITCHELL continues to watch the sonar. A second later, the tone of the sonar changes.)
LT. COMMANDER MITCHELL: Er, we have a contact, sir.
(Suddenly, various electronic screeches come out of the equipment. LOVELL tears off his headphones.)
COMMANDER RIDGEWAY: What the blazes is that?
LDG. SEAMAN LOVELL: It's gone crazy, sir!
COMMANDER RIDGEWAY: Get on to the sonar maintenance.
LT. COMMANDER MITCHELL: Aye aye, sir.
(MITCHELL runs across to a control board.)
LT. COMMANDER MITCHELL: It's packed up, sir. It's gone dead, sir!
COMMANDER RIDGEWAY: What the devil's going on?
(As RIDGEWAY moves across to MITCHELL, a report suddenly comes over the intercom and RIDGEWAY stops in his tracks.)
ENGINEER: (OOV: Over intercom.) Engine room here, sir. Loss of essential power supplies.
(A gaggle of voices starts to come over the intercom to the stunned COMMANDER...)
(...as the submarine hovers in the watery depths.)
31: INT. CASTLE. GOVERNOR'S OFFICE
(The MASTER walks down a spiral staircase into TRENCHARD'S office, the device still in his hand.)
MASTER: Well, Trenchard. I think that you handled Captain Hart exceedingly well.
TRENCHARD: (Troubled.) I can't keep it up, you know? The lies I've told! How long before that device of yours is ready?
MASTER: Oh, just a few hours now.
(The MASTER puts the device down on TRENCHARD'S desk and sits in his chair.)
TRENCHARD: What is exactly is it?
MASTER: It's a perfect replica of the communications device used by the enemy agents. We are going to use it to lure them into a trap.
TRENCHARD: (Sighs.) Well, I only hope it works. If it doesn't, I'm for it, you know?
MASTER: Oh, it'll work, don't you worry about that.
(The MASTER crosses to TRENCHARD.)
MASTER: Just think of it, Trenchard - you will be responsible for exposing some of the most dangerous saboteurs this country has ever known.
(He places a hand on TRENCHARD'S shoulder.)
MASTER: I think you'll find that a grateful government will give you anything that you ask for.
TRENCHARD: (Humbly.) Oh, don't want any reward, of course. Er, just doing my duty.
MASTER: Yes, of course. I'd better get back to my quarters.
(He picks up the device.)
TRENCHARD: This Doctor fellow - have you finished with him?
MASTER: For the time being, yes. Oh, by the way, what about the girl? Have they caught her yet?
TRENCHARD: Oh, grounds are very large, you know. Only a matter of time, though. She can't get away.
MASTER: I hope you're right.
(He crosses to the door.)
MASTER: Erm, it might be better if one of the guards were to take me back.
TRENCHARD: Huh? Oh, yes, of course! Er, must keep up appearances, what?
(He presses an intercom switch.)
32: INT. CASTLE. MASTER'S ROOM
(JO succeeds in opening the DOCTOR'S cuffs. The DOCTOR whispers "Okay" to her so quietly that it can hardly be heard. He then whispers "behind
the door" in the same almost inaudible tone. JO nods and takes up the position. The DOCTOR, keeping his hands behind his back, then starts calling out...)
DOCTOR: Guard! Guard! (Shouts.) Guard! I want to talk to you!
(CASTLE GUARD DREW enters the room.)
CASTLE GUARD DREW: What's wrong now, sir?
(JO comes out from the behind the door and crouches down immediately behind DREW.)
DOCTOR: These handcuffs - they're far too tight. They're killing me!
CASTLE GUARD DREW: I'm under strict instructions, sir, that they're to be kept on...
(The DOCTOR leans over from his chair and butts DREW in the stomach. The CASTLE GUARD stumbles backwards, over JO and onto the floor. He attempts to sit up
but JO gives him a quick karate chop on the chest, knocking him out. The DOCTOR pulls his hands free and shakes JO'S hand. They then head for the door which JO
opens. The DOCTOR politely holds up his hand for her to go through.)
DOCTOR: After you.
JO: No, after you!
DOCTOR: No, no - after you!
(JO laughs and goes through into the passage. The DOCTOR follows.)
33: INT. NAVAL BASE. CAPTAIN HART'S OFFICE
(JANE BLYTHE comes from the radio room and heads for the chart to make an adjustment. HART is at his desk, deep in thought.)
CAPTAIN HART: Anything from the sub?
3RD OFFICER JANE BLYTHE: No sir.
CAPTAIN HART: Look here, Blythe, you'd better get on to UNIT and see if they've any news yet of the Doctor and Miss Grant's return.
3RD OFFICER JANE BLYTHE: Right, sir.
34: INT. CASTLE. MASTER'S ROOM
(TRENCHARD enters the MASTER'S room and sees his "prisoner" bent over the unconscious form of CASTLE GUARD DREW with the DOCTOR'S handcuffs in his
TRENCHARD: What's happened?
MASTER: It would appear that Miss Grant has succeeded in releasing the Doctor.
TRENCHARD: This is appalling! It'll ruin everything!
MASTER: Exactly. (Angrily.) That's why you've got to find them!
(The submarine falls towards the sea bed.)
36: INT. SUBMARINE CONTROL ROOM
(MITCHELL walks over to the COMMANDER.)
LT. COMMANDER MITCHELL: It's no good, sir. There's absolutely nothing wrong with the engines. We've run a complete check on them.
COMMANDER RIDGEWAY: And we're still going down.
36: SEA BED
(The nose of the submarine hits a shelf of rock...)
37: INT. SUBMARINE CONTROL ROOM
(...jolting the men inside.)
38: SEA BED
(The back end of the submarine then falls on the sea bed...)
39: INT. SUBMARINE CONTROL ROOM
(...and the men inside are again thrown to one side. The vessel steadies and MITCHELL crosses to RIDGEWAY.)
LT. COMMANDER MITCHELL: What do we do now, sir?
COMMANDER RIDGEWAY: Keep working on the engines.
LT. COMMANDER MITCHELL: There's nothing wrong with them, sir. There's nothing wrong with any part of this boat. We've checked everything.
COMMANDER RIDGEWAY: Then check again.
(They suddenly hear the echoing sound of banging noises on the hull.)
LT. COMMANDER MITCHELL: Divers?
COMMANDER RIDGEWAY: That's impossible.
(They hear more bangs.)
LT. COMMANDER MITCHELL: There's something out there, sir.
(Suddenly, the ship's intercom bursts into life.)
RATING: (OOV: Over intercom.) For'ard section here, sir. We're being attacked!
(Behind the sound of the sailor can be heard cries and shouts from his compatriots. RIDGEWAY grabs an intercom radio.)
COMMANDER RIDGEWAY: (Into radio.) This is the captain, what's happening?
RATING: (OOV: Over intercom.) Someone's coming in, sir. Through the escape compartment.
COMMANDER RIDGEWAY: (To MITCHELL.) Shut off for'ard and aft escape compartments.
LT. COMMANDER MITCHELL: Aye aye, sir.
COMMANDER RIDGEWAY: (Into radio.) What's happening, man?
RATING: (OOV: Over intercom.) They're coming in, sir! They're...
(The voice suddenly screams out in agony and then cuts out...)
40: SEA BED
(The submarine is completely still on the sea bed.)
41: INT. CASTLE. GOVERNOR'S OFFICE
(TRENCHARD is on the phone in his office.)
TRENCHARD: (Into phone.) Understand this - they've got to be found. They're two dangerous enemy agents. Use every available man.
(He puts the phone down and swigs back a drink of something strong.)
42: EXT. CASTLE GROUNDS
(The DOCTOR and JO pelt down a hill in the castle grounds. Nearby is a bayonet practice range. From behind this, CASTLE GUARD BARCLAY stands up and speaks
calmly into a radio.)
CASTLE GUARD BARCLAY: (Into radio.) Ground to control. Subject's entering sector twenty-seven.
44: INT. CASTLE. GOVERNOR'S OFFICE
(TRENCHARD is on the phone again.)
TRENCHARD: (Into phone.) Yes, yes, all right.
(He puts the phone down. The MASTER is back in his office, together with the device.)
TRENCHARD: They're making for the beach - towards the minefield.
MASTER: No doubt they're trying to rejoin their associates at sea.
TRENCHARD: Right, we must head them off.
MASTER: No, let them get to the beach.
TRENCHARD: But we've got to catch them!
MASTER: We shall. This device is now ready for testing. We shall use it trap them all together!
(The MASTER switches on the device. A small radar-type disc on top starts to spin round and a powerful signal is given out.)
45: EXT. CLIFFS AND BEACH
(The DOCTOR and JO run past a life-ring post and towards a cliff. They see the steepness of the ridge down to the beach and run back. On the beach, a
minimoke filled with guards speeds towards the spot near the cliffs. The DOCTOR grabs the rope from the ring and runs back towards the cliff edge as the
minimoke gets nearer. He then throws the rope over the edge and starts to abseil down the cliff.)
DOCTOR: All right, Jo! Come on!
(JO hesitates but sees the MASTER, device in hand, with TRENCHARD and some guards running past to life-post and towards her. She then puts the rope round her
and also abseils down, joining the DOCTOR on the beach just as the MASTER and TRENCHARD appear at the top of the cliff. They 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...)
Lt. Commander Mitchell
3rd Officer Jane Blythe
Ldg. Seaman Lovell
Castle Guard Drew
Castle Guard Barclay
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