THE DALEKS' MASTER PLAN - EPISODE 4

THE TRAITORS

1.  SPAR

(Power builds up in the SPAR, as the craft slowly takes off.  The Doctor is watching the scanner.)

VYON:  Next stop Earth.
DOCTOR:  Oh, Am I glad to hear that, Bret.  Now, you got some serious thinking to do.  (to Katarina)  Katarina, go to those doors and check and see that they're made secure.

(Katarina goes up to the door.)

DOCTOR: Remember Chen will have allies on earth and...

(Katarina screams as Kirksen bursts through the internal door.  He seizes her with one hand, and pulls her round in front of him like a shield. In his other hand he has Bors' knife.  Katarina screams in terror and Steven leaps to his feet.  He stops short as Kirksen smiles wickedly, wrenching Katarina's head so that her neck is arched back, the knife edge pressed against her skin.)

          KIRKSEN: Keep back!

DOCTOR:  _____What do you want - release that girl!
KIRKSEN:  Never mind! Who's in charge of this thing?  ANSWER ME!
VYON:  I am!
KIRKSEN:  Where are you heading?
VYON:  Earth.
KIRKSEN:  Change course.

(Vyon hesitates.)

KIRKSEN:  CHANGE IT!
VYON:  Where to?

(Kirksen scowls.)

KIRKSEN:  Not Earth.  Go to the planet Kembel.
DOCTOR:  KEMBEL?
KIRKSEN:  SHUT UP AND DO AS I SAY!
VYON:  Kembel deserted man.  It's as bad as Desperus.
KIRKSEN:  Nowhere's as bad as Desperus!

(He shakes with maniacal laughter.)

STEVEN:  (trying to stall for time, warning)  The Daleks are on Kembel!

KIRKSEN:  So?
DOCTOR:  The Daleks are no help, We're going back to earth!

(An insane look comes over Kirksen's face.)

KIRKSEN:  Then I shall be sent back to the Devil's planet!  No, whoever the Daleks are, they'll help me.

STEVEN:  You don't know about them...

(Kirksen's places the point of the knife under Katarina's ears and Steven stops moving.)

KIRKSEN:  (in a mad snarl)  I said go to Kembel!  KEMBEL!

2.  DALEK CITY CONTROL ROOM, KEMBEL

(Meanwhile, the Black Dalek hears a report from the Daleks that he sent to chase the SPAR, who have now crash-landed on Desperus.)

DALEK VOICE:  (oov)  Only slight damage was sustained.  We are ready to continue pursuit of Earth Vessel.

(The Black Dalek turns to the Comm. Dalek.)

BLACK DALEK:  What is course of Earth Vessel?
COMM. DALEK:  (checking its instruments)  Back on course - 707.  Heading for Earth.
BLACK DALEK:  Contact Mavic Chen through secret communication red.  He must recapture the Taranium and exterminate creatures who took it.
COMM. DALEK:  I obey.

(The Black Dalek speaks, via the communicator, to the Pursuit ship himself.)

BLACK DALEK:  Pursuit vessel, return to base.
DALEK VOICE:  (oov)  We obey.

(The Black Dalek turns to another Dalek, who is monitoring its controls.)

BLACK DALEK:  Destroy Pursuit ship.  They have failed in their mission.

(The second Dalek moves to destroy the Pursuit Ship.)

BLACK DALEK:  WE WILL NOT TOLERATE MISTAKES!

3.  SPAR

(Vyon moves his hands over the controls and nods to the Doctor.)

DOCTOR:  (to Kirksen)  We're changing course.  Now, release that girl.

(Kirksen waves the knife in the air.)

KIRKSEN:  Do you think I'm a fool?

(Vyon tries speaking over the intercom.)

STEVEN:  Course is changed.  We're heading for Kembel.
KIRKSEN:  (muttering)  It doesn't feel as if we've changed.

(Katarina, at the mention of Kembel, starts fighting again to get herself free.)

STEVEN:  Well, look up at the screen and you'll see.

(Kirksen steps back, hauling Katarina with him into the airlock.  He hits the door switch, locking them in.  He peers out at the others through a glass panel in the door.)

STEVEN:  Well open the door from the control panel . I'll rush him!

(He stands tensed and ready for action beside the inner doors to the airlock, but the Doctor shouts a warning.)

DOCTOR:  The girl will be dead before the door's half open!

(Kirksen has already subdued Katarina, and he holds his knife ready to slash her throat again.  The Doctor goes over to Vyon.)

DOCTOR:  Can we talk to him in there?

          VYON:  Yes, I've turned on the talkback.

DOCTOR:  Let's try a little bluff.

(He pulls the lever for the intercom and speaks loudly through the speaker.)

DOCTOR:  Now, then!  Listen to me, whoever you are.  Bring that girl in here, or we will press a button and you will go outside the door  into space.
KIRKSEN:  Then the girl dies too!  If you open the outside door I'll press the inner release and then we'll all be dead!

(Katarina tries to cry her protests to the Doctor, who looks on in fury and agony at the situation.)

VYON:  We can't seem to get through to him - he's crazy.
DOCTOR: Got to get Katarina out of there!

(Steven realises that Vyon has turned off the talkback.)

STEVEN:  Stop that!  Turn the talkback on again!

(Vyon shrugs.)

VYON:  There's no point.
STEVEN:  Turn it on again, before he really hurts her!
VYON:  Look, he can't kill her - or he hasn't a hostage.

(Furiously, Steven turns the switch himself and then rushes over to the airlock and shouts through it.)

STEVEN:  YOU... ANIMAL!

(Kirksen pulls Katarina's arm further up her back and she screams out again in great pain.)

KIRKSEN: Now that's just for starters. DO AS I SAY!

(The Doctor turns to Vyon with a disgusted look on his face.)

DOCTOR:  CHANGE COURSE!

(Kirksen looks out of the airlock and sees the stars beginning to change.)

KIRKSEN:  Now, that's more like it!
DOCTOR:  (banging the console with his hand in fury)  Take him back to Kembel.  Take him back to Kembel!  Let the Daleks deal with him.
STEVEN:  Yes, and us.
DOCTOR:  Don't worry, dear boy, We'll find a way out.

(Kirksen is getting fed up with Katarina's fighting.)

KIRKSEN:  STOP THAT OR YOU'RE DEAD!

(Vyon doesn't like this.)

VYON:  I can't sacrifice everything for the sake of that one girl!
STEVEN:  Listen! Without us you wouldn't have got off Kembel at all, and nothing would be worth bothering about!
VYON:  All right, so we all go back together.  But without me, I doubt that you would have got this far either.
STEVEN:  Yes, all right, but I won't let you hurt Katarina.  We'll head back for Kembel as the Doctor says on the way we may find a way to get her out of there.

(Kirksen hears this.)

KIRKSEN:  You won't.

(Katarina wrenches her hand free and reaches for the airlock switches.  Kirksen, seeing this, tries to get hold of her hand.  Outside, Steven and Vyon watch this, and see which control Katarina is reaching for.)

STEVEN:  No, not that one!  Katarina!

(It is too late.  The outer airlock doors open, and Katarina and Kirksen are swept into space to their deaths.)

STEVEN:  KATARINA!

(Vyon's hand flashes to the controls and the outer door closes again, as Steven tries to open the inner door.  All three men are in total shock.)

STEVEN:  (softly)  Too late.   She pressed the wrong button, Doctor.

DOCTOR:  She may have wanted to, dear boy.  She wanted to save our lives.
VYON:  (awkwardly)  It must have been quick.

(The Doctor stares out into space.)

DOCTOR:  I hope she's reached her Place of Perfection.

(Steven stares at the airlock.)

STEVEN:  Yes, but not that way.

(The Doctor pats Steven's shoulder again.)

DOCTOR:  She didn't understand.  She couldn't understand.  She wanted to save our lives.  And perhaps the lives of all the other beings of the Solar System.  I hope she's found her Perfection.

(He stares into space again.)

DOCTOR:  Oh, how I shall always remember her as one of the Daughters of the Gods.Yes, As one of the Daughters of the Gods.

4.  SPACE

(The bodies of Katarina and Kirksen float away into space. The SPAR turns back towards Earth.)

5.  DALEK CITY CONTROL ROOM, KEMBEL

(Trantis, one of the delegates, fed up with not hearing any news, marches into the Control room and right up to the Black Dalek.)

TRANTIS:  (with a mocking smile)  Dalek Supreme, You have failed to get back the Core of the Time Destructor.
BLACK DALEK:  (staring at the new arrival)  We shall get it back.
TRANTIS:  You show too much trust in Mavic Chen.
BLACK DLAEK:  Mavic Chen is hungry for power.  We have offered him more power than he has ever thought of.  He will return to us the Taranium Core.
TRANTIS:  (in mock alarm)  Supposing he fails?
BLACK DALEK:  He will not.  He had been given instructions.
TRANTIS:  (eagerly)  What instructions?
BLACK DALEK:  It is not necessary for you to know.
TRANTIS:  (snarling)  As Representative of the largest of the outer galaxies, I have the right to know!
BLACK DALEK:  Representative Trantis.  The Daleks will not fail and neither will any of its' allies.

(Trantis retreats, step by step, as the Black Dalek moves towards him.)

BLACK DALEK:  If anything tries to stop us we will destroy it.

(Trantis now looks terrified.)

BLACK DALEK:  Nothing will be allowed to stand in the way of our plan to conquer the Universe.

6.  SPAR

(Some time later, the Doctor is looking at the scanner.)

DOCTOR:  Hmm, Judging by the position of those planets, we shall land quite soon.
VYON:  Yes and that's the problem.  It won't be easy.

(The Doctor turns to Vyon in concern.)

DOCTOR:  Haven't we sufficient powerdrive to land safely, hmm?
VYON:  Yes but we can't land at the main landing-area - remember, this is Chen's space vessel!
DOCTOR:  Yes, you've got a point there.  Where can we land, Hmm?

(Vyon points out a grid pattern on a computer screen, one finger tapping a particular mark.)

VYON:  An Experimental Plant - a little way out from Central City.  I have a friend there I think will help us.

(The Doctor, Steven and Vyon look at each other.)

7.  GUARDIAN'S OFFICE

(In his beautifully appointed office, Mavic Chen's curved desk separates him from his Security Chief, Karlton.  Below Karlton are the workplaces of his two main agents, Lizan, a female and Teknix.  Lizan is standing in front of Mavic Chen's desk with a sheaf of papers, while Chen himself looks at a monitor.  On the monitor revolves an identity projection of Bret Vyon.  Karlton is standing next to Lizan. )

MAVIC CHEN:  (staring at the screen)  So that's our traitor.
LIZAN:  (reading through the papers)  Yes, Bret Vyon.  Bred on Mars Colony 16.  Joined Space Security Service 3990.  Gained First Rank 3995.  Gained Second Rank 3998.
MAVIC CHEN:  (beams at her)  You have a good memory.
LIZAN:  (blushing)  Thank you, Guardian.
MAVIC CHEN:  (nods at the monitor)  And he looks like that?
LIZAN:  Exactly like that, how can he look otherwise?  Guardian, have you no faith in computerised data?
MAVIC CHEN:  (laughing)  Every faith.  But this information is vital.  The man is dangerous and must be caught.

(He turns his chair and stares balefully at Lizan.)

MAVIC CHEN:  I would hate there to be any mistake!
LIZAN:  (soothing)  A mistake is impossible.  Our computer network contains precise chemical details of every man, woman, and child within our Solar System.

(Mavic Chen gives a slight smile at this.)

MAVIC CHEN:  There are forty billion people in the Solar System.  Doesn't that provide some scope for error?
LIZAN:  (positive)  There is no scope for error.

(Mavic Chen thinks about it for a little while and then leans forward to address the two agents.)

MAVIC CHEN:  Very well, have it sent out to all stations.  Now, What about Gantry, the other traitor?
LIZAN:  We're working on his Identity Projection now!  It should be ready shortly.

(Karlton speaks for the first time.)

KARLTON:  Since Vyon is in command, I gave priority to his Projection.

(Lizan makes a note of this on her papers.)

MAVIC CHEN:  Excellent!  EXCELLENT!  Vyon and Gantry were the two who never reported in from the planet, Kembel, am I right?
LIZAN:  Yes, Guardian.

(Mavic Chen sighs.  Lizan, a great admirer of Chen, gazes at him with sympathy.  Mavic Chen catches her gaze.)

MAVIC CHEN:  Then they are the two who took over my SPAR.  It's possible they may be in association with other creatures.  But we don't know, where from.

(He looks at Karlton, who replies.)

KARLTON:  When you catch Vyon and Gantry, you catch them, too.

(Mavic Chen turns off the monitor and Lizan waits for orders.)

MAVIC CHEN:  You've done well.  I want all Space Security agents called back to Earth.  If the traitors are not caught at the landing zone, then Central City must be cordoned off until they are found.

(Lizan nearly runs from the room to carry out the orders but Mavic Chen calls her back.)

MAVIC CHEN: And Lizan!  They will be killed on sight.  Give out the instructions.
LIZAN:  Yes, Guardian.

(Lizan makes another note of this and leaves the room.  Mavic Chen and Karlton look at each other in satisfaction.)

MAVIC CHEN:  I think that takes care of that!  You know, Karlton, some of your agents are getting too good - we don't want to spoil things for ourselves at this stage.
KARLTON:  They won't.  I've already insisted that all future operations shall be cleared with me before they're begun.

(Mavic Chen stares at Karlton with a stern face.)

MAVIC CHEN:  If you had done that in the first place, we wouldn't be in this spot.
KARLTON:  (defensively)  Cory's mission was one that he kept to himself. It was done without official sanction of any kind!

(This seems to please Mavic Chen.)

MAVIC CHEN:  And you could hardly have stopped the others after his distress signal.  (sardonically)  You must do better than that.  I would hate to have to lose you.

(Karlton makes a gesture of apology and steps back.)

KARLTON:  You know you can trust me!

(Mavic Chen looks away and a faint smile appears over Karlton's face.)

8.  SPAR

(Vyon looks worriedly over the controls .)

VYON:  Look, the drive force is very weak.
DOCTOR:  But can we land?
VYON:  Yes, but I don't know what would happen. The pull is too hard.

STEVEN:  We can't crash now!

VYON:  I'm afraid I may not be able to help it.
STEVEN:  Yes well remember, Bret, we got some valuable cargo on board.
VYON:  What, the Taranium?
STEVEN:  And the Doctor.

(The Doctor appears, carrying the core - he heard Steven's last words.)

DOCTOR:  Yes, I heard that!  Now, don't concern yourselves over me! I can look after myself.  The most important factor is this Taranium.
VYON:  (checking the instruments)  Right, stand by!

(The ship powers down as they touch down at the Experimental Station, but unfortunately they damage the controls.)

9.  GUARDIAN'S OFFICE

(Mavic Chen turns round to confront Karlton, as the Security Chief enters his office.)

MAVIC CHEN:  Only because of the Taranium am I on the council.
KARLTON:  (with icy calm)  It will be returned.
MAVIC CHEN:  (staring into space, hissing)  It's got to be.

(He walks across the room.)

MAVIC CHEN:  I want that position, right beside the Daleks.  I'll govern the Universe!
KARLTON:  Surely Trantis will be first after the Daleks?

(Mavic Chen stops pacing and explodes.)

MAVIC CHEN:  Trantis...  TRANTIS!  They don't like him.  Agreed that his is the largest galaxy, but he's already demanding too much say in what goes on.  They'll want him out of the way, and I have a plan which may help them to achieve just that!

(His features turn into a wicked leer.)

MAVIC CHEN:  Then it will be me, Mavic Chen, who'll be next in line.

(Chen stalks past Karlton triumphantly, and Karlton bows his head.)

KARLTON:  (solemnly)  And I will be there, behind you.
MAVIC CHEN:  Of course!
KARLTON:  (drily)  Of course.

(Something about Karlton's tone brings Mavic Chen's attention to the present crisis.)

MAVIC CHEN:  (sharply)  Is your Special Force dealing with Bret Vyon?
KARLTON:  Not completely.  I thought it wiser to use some of the ordinary Security men.

(Mavic Chen thinks about this.)

MAVIC CHEN:  Hmmmm - very good.  We'll need your men next time.  Who's in command?

(Karlton gave Mavic Chen a significant look.)

KARLTON:  Kingdom.

(Mavic Chen's face changes to one of absolute delight.)

MAVIC CHEN:  Kingdom!  Ruthless, hard, efficient!  And does... exactly as ordered.

(Karlton bows.)

KARLTON:  Quite.

(A buzzer arouses them.  Karlton crosses to the door, where a series of buttons operate communicators.  He presses one and listens to the information issuing from a special ear-piece.)

KARLTON:  A-ha!  I see.  Carry out Emergency Plan B.

(He presses another button to disconnect.)

KARLTON:  (blandly)  The traitors have arrived.
MAVIC CHEN:  Good.
KARLTON:  But not at the landing area.

(Mavic Chen's pleased expression vanishes.)

MAVIC CHEN:  What?
KARLTON:  They have crash-landed at the Experimental Station.

10.  EXPERIMENTAL STATION

(The place looks deserted as the three men disembark.)

VYON:  No-one here.  We'll have to wait.  Come on!

(They hurry through the plant in search of Vyon's friend, Daxtar.)

11.  GUARDIAN'S OFFICE

(Mavic Chen waits alone for the next development, writing on some papers at his desk.  Soon, the door buzzes and Karlton appears.)

KARLTON:  Kingdom is here.
MAVIC CHEN:  (in a hearty voice)  Good.  Come in, Kingdom, come in!

(A young, beautiful, red-haired woman enters the room.  Sara Kingdom has fascinating green eyes and high cheekbones.  She stands to attention in front of Mavic Chen.  Her SSS uniform fits her like a glove and the long, well-polished boots add to the trim figure.)

MAVIC CHEN:  (seriously)  You know what's happened?

(Sara's voice is clear and as cold as ice.)

SARA:  Yes.
MAVIC CHEN:  Do you know how many there are?
SARA:  Three.  Bret Vyon and two strangers.  They look as though they could come from Earth but are oddly dressed.  None of them can leave the plant.
MAVIC CHEN:  Good.
SARA:  They're in the main block.  I'm going to capture them myself.

(Mavic Chen raises his hand with the little finger extended, beckoning her to stand beside him.)

MAVIC CHEN:  Before you do that, there is something you have to know.

12.  EXPERIMENTAL STATION

(The Doctor, Vyon and Steven now stood in the central plant.)

STEVEN:  Look, where on earth is this Daxtar?
VYON:  He shouldn't be long.
DOCTOR:  And I think we're just wasting valuable time sitting about here waiting for this man, Baxter or Daxtor or whatever he call himself, hmm.
VYON:  Doctor, Daxtar is in a position to help us.
DOCTOR:  Surely everyone must know that Chen's space-ship has crash-landed only a short distance away from here.  There must be hundreds of people looking for us!  Hm.
VYON:  Doctor, there are very few people allowed near this place, it's a restricted area.

(The Doctor hurrumphs absently, still pacing around the room.)

VYON:  Look, don't you understand that Chen will probably have returned to Earth by this time.  He would have realised that I was on man on the planet Kembel. I expect we're wanted men by this time.
DOCTOR:  But this is an Experimental plant, There's no scientists, no staff, nobody!  We might just as well have landed ourselves on an empty planet.  What on Earth is happening?
VYON:  Doctor, I don't know anymore than you do.
DOCTOR:  Has it occurred to you, by any chance, that we might have deliberately walked into an ambush.
STEVEN:  What's the point in standing here just waiting to be caught?
VYON:  (exasperated)  Because Daxtar is the only man who will believe our story.

(A door opens and a man in his early fifties enters the room.)

DAXTAR:  What story?

13.  GUARDIAN'S OFFICE

(Mavic Chen finishes giving his instructions to Sara.)

MAVIC CHEN:  So you will understand that it's absolutely essential that this emm of Taranium is returned to me.
SARA:  Of course, every precaution for it's safety will be taken.
MAVIC CHEN:  Good. See to it.

(Sara turns and marches from the room.)

KARLTON:  She actually believed you.
MAVIC CHEN:  Of course.
KARLTON:  I thought for a moment you were really going to tell her about the Daleks.
MAVIC CHEN:  Oh come!  We need that Taranium back, but we can't allow any more people to know the plan.
KARLTON:  I was watching her all the time.  She never doubted anything, even momentarily.
MAVIC CHEN:  A good security agent.  A heroic war cry to apparently peaceful ends is one of the greatest weapons a politician has.

14.  EXPERIMENTAL STATION

(Daxtar has been briefed over the situation.)

DAXTAR:  (incredulously)  Mavic Chen!?  The Daleks!?  I can't believe it!
VYON:  The Doctor saw it.
DOCTOR:  Quite true.  And then he gave a rather pompous speech of self-satisfaction and handed over the Core of the Time Destructor to the Daleks.
STEVEN:  They intend to capture or destroy the Solar System - and Chen is helping them.

(Daxtar raises his hands in an uncomprehending gesture.)

DAXTAR:  But why?
DOCTOR:  A lust for more power than he already has - Universal power!

(Daxtar shakes his head.)

DAXTAR:  It's incredible.
STEVEN:  Oh don't worry about it's incredibility!  We got to do something to stop him.
DOCTOR:  Yes, quite so.  So whatever plans you have, it's essential that Steven and I return to the planet Kembel.  I want to recover something of unique value.

(Daxtar whips round to face the Doctor.)

DAXTAR:  (urgently)  You didn't leave the Taranium there?
STEVEN:  (laughing)  No no! The Doctor has it.

(Daxtar whistles with relief.)

DAXTAR:  Good.  That gives us a little time.

(He looks at his watch.)

VYON:  Very little.  We've got to move fast.

(Busily, Daxtar gets up and hurries towards the door.)

DAXTAR:  Of course.  We must get down to the Security Buildings at once.  (looking at VYON)  The Planets must all be alerted.  A combined Task Force must be sent off to Kembel immediately.

(Daxtar is about to open the door.)

DOCTOR:  NO!

(Vyon turns and stares in annoyed astonishment at the Doctor, who stands erect, looking straight at Daxtar.)

VYON:  What do you mean, Doctor?  What are you playing at?
DOCTOR:  (still staring at Daxtar)  I suggest you ask Daxtar what he is playing at.
DAXTAR:  (look bewildered)  I don't understand.  Look, this situation must be dealt with at once!
DOCTOR:  What price is Mavic Chen paying you for your treachery, hmm?
VYON:  Treachery?  I know this man all my life.  He's no traitor.
DOCTOR:  Long acquaintance is no guarantee for honesty.  Ask him!  Ask him how he came to know that the Core of their Time Destructor was Taranium!

(Vyon stares at Daxtar.)

DAXTAR:  Don't be so ridiculous!  One of you mentioned it when you were telling me.  Why you, yourself, mentioned it when you said that Chen handed the stuff over.
DOCTOR:  I did not, sir!  How long have you been in this conspiracy?

(Both men are now nearly shouting.)

DAXTAR:  WHAT CONSPIRACY?

(Vyon reaches for the gun in his belt.)

DAXTAR:  You're making a stupid mistake!
DOCTOR:  There is you, and Chen, and HOW MANY OF THE OTHERS!?  OR WHAT OTHERS ARE INVOLVED?!

(Daxtar turns to Vyon for help.)

DAXTAR:  Look, Bret.  You've known me for many years, you know I wouldn't be mixed up in anything like this?!
VYON:  (coldly)  How did you know about the Taranium?

(Daxtar points at the Doctor.)

DAXTAR:  He told me!  For heaven's sake, you must have heard him... you two!
VYON:  Traitor!

(He pulls his gun out.  Daxtar freezes with horror and then Vyon fires.  The blast catches Daxtar full in the chest and, with a scream, he falls.  Steven and the Doctor look on, appalled.)

DOCTOR:  (fumed)  You brainless idiot!  How many times have I told you about taking lives?

(Vyon looks at him as he returns his gun to the holster, unmoved.)

DOCTOR:  We have other ways and means of dealing with evil doers.
VYON:  (unmoved)  He deserved worse.
DOCTOR:  Possibly.  But now we shall never know whom we can trust!

15.  DALEK CITY CONTROL ROOM, KEMBEL

(The Comm. Dalek turns from his console.)

COMM. DALEK:  A signal from the planet Earth.
BLACK DALEK:  Report.
COMM. DALEK:  Mavic Chen has almost recaptured the Taranium Core and will be returning with it to land here in two Earth days.
BLACK DALEK:  Have the fugitives been exterminated?
COMM. DALEK:  The report did not say.  But it is believed that they come from the tenth galaxy under the leadership of Trantis.

(Trantis, hearing this, is furious.)

TRANTIS:  That is not true.  It is a plot by Mavic Chen to discredit me!  He is jealous of my power in the outer galaxies.
BLACK DALEK:  We shall see.  Has the report been confirmed?
COMM. DLAKE:  No.  It was a suspicion by the Earth people.
TRANTIS:  It IS Chen!  He is trying to undermine the balance of the Galactic Council.
BLACK DALEK:  When Mavic Chen returns we shall discover the truth.  By then those who stole the Taranium will have been identified and exterminated.

16.  EXPERIMENTAL STATION

(Vyon picks up Daxtar's body and dumps it in a corner.)

VYON:  I'm going to get into the Security Building and send out the warning myself.
DOCTOR:  And how do you propose to do that?
STEVEN:  Yes, we're probably being searched for now by other friends of Chen.  I mean Daxtar clearly knew about the disappearance of the Taranium...
DOCTOR:  Yes.  Possibly.  We filled in the story long before he gave himself away.
VYON:  I could try to bluff my way out.

(The Doctor looks deep in thought.)

VYON:  Well, it's worth a try!

(Silence.)

VYON:  Well you haven't thought of a better idea.
DOCTOR:  Yes, possible.  If you hadn't killed Daxtar of course there wouldn't be any need to.
STEVEN:  Of course there would.  We wouldn't have been able to believe anything he said.
DOCTOR:  Well, there's not much point in standing here discussing it any longer. We shall have to try out your scheme, though I very much doubt of any sort of success that you might have.

(They turn to leave but before they leave, the door burst opens and Sara bursts in.)

VYON:  Sara!
SARA:  (icy calm)  Bret.
VYON:  You're just the person we need.
SARA:  I doubt that.

(She pulls out her gun and covers each of the three men.)

SARA:  Which of you has the Taranium?

(Vyon takes a step forward, and Sara covers him.)

VYON:  (shouting)  RUN FOR IT!

(Sara's back is to the door and the Doctor and Steven manage to run out of the room.  However, Vyon isn't so lucky and he manages to get himself covered again with the gun.)

SARA:  (icily)  Give me the Taranium!
VYON:  (pleading)  Sara!  Please listen...
SARA:  GIVE ME THE TARANIUM!
VYON:  (in shock)  You too?!

(He reaches for his gun but Sara fires and hits Vyon in his heart.)

VYON:  (in total agony)  SARA!

(Vyon collapses on the floor.  Sara sighs and then runs out the door.)

17.  CORRIDOR

(Sara Kingdom runs into view.)

SARA:  (calling)  Borkar!  Borkar, where are you.

(Borkar, another security guard, comes running in from the other end of the corridor.)

BORKAR:  Yes?
SARA:  The two fugitives have escaped.  All exits from the main block are to be guarded.

(Borker points his gun at the body of Bret Vyon.)

BORKAR:  That's Bret Vyon!
SARA:  Yes, he's dead.

(Sara says this with a little sadness in her voice.)

SARA:  The others must be killed as well.  They will be shot on sight but aim for the head.

(They part.)