Headhunter
Original Airdate: November 2, 1981

[Scorpio in flight]

[Flight deck]

SLAVE: Destination co-ordinates, sir.
VILA: What?
SLAVE: I deeply regret disturbing you, sir.
VILA: Why do it then?
SLAVE: Is that a question, sir?
VILA: ...Course co-ordinates?
SLAVE: Eight-five-zero by two-eight-one, sir.
VILA: Just our luck to get this mission.
(Tarrant is laying on a bunk)
TARRANT: It was our turn.
VILA: If Avon rates this Muller as such a genius why didn't he come for the man himself?
TARRANT: He probably just wanted to get you away from the base, to avoid more bother over Muller's lady.
VILA: I was a perfect gentleman towards her.
TARRANT: That's what bothered us.

[Xenon base control room]

AVON: Muller never talked about his work?
VENA: I'm not a cyberneticist, Avon. He's always been dedicated to the perfection of...
AVON: ...a machine.
VENA: An ideal.
AVON: Of which he never speaks.
VENA: Our relationship is more...
AVON: ...recreational.
VENA: I try to help him relax, yes. Forget work for a few hours. He drives himself to the limit all the time. Recently he's been almost ...frenzied.
AVON: Who sets this frenzied pace? Muller, or the Robot Development Cartel?
ORAC: Muller's childhood sets the pace, naturally.
AVON: You think it was Ensor's training?
ORAC: He was a tyrant for self-discipline.
VENA: Ensor?
AVON: The man who designed Orac. He was Muller's first teacher. (deactivates Orac) One of the great ...geniuses in the field of cybernetics.
VENA: Greater than Muller?
AVON: Well now, ...that remains to be seen.

[Flight deck]

TARRANT: It is a straightforward pickup.
VILA: I'll believe that when we're back at base.
MULLER: (on communicator) Scorpio. Scorpio. This is Muller. Muller calling Scorpio. Respond please.
TARRANT: (into communicator) Muller, this is Scorpio. We're proceeding to rendezvous. What's the problem?
MULLER: About that rendezvous. Change plan.
TARRANT: Why?
VILA: What's wrong?
MULLER: They are on to me. Can you teleport direct to me here?
TARRANT: Into your laboratory?
MULLER: Affirmative.
TARRANT: Is it shielded?
MULLER: Negative. Not shielded.
VILA: Hold on, Muller, we'll check. (into communicator) Avon?
AVON: (on communicator) Yes, Vila, I got all that.

[Xenon base control room]

AVON: (into communicator) Hold a moment. (to Vena) Well, ...they're on to him.
VENA: I can't think how.
AVON: The point is will they use force to hold him?
VENA: I ...I don't know.
DAYNA: But the outfit he works for is civil not military.
AVON: They might get a lot less civil at the thought of losing money.
SOOLIN: And Muller's brains are their single most profitable asset, yes?
AVON: Without question.
DAYNA: But force is hardly...
AVON: ...is their most predictable resort. (into communicator) Tarrant, do as Muller asks and do it quickly. Teleport in on orbit approach. Lift Muller and his stuff out as fast as you can. Remember, they may try and use force to stop him leaving Pharos.
TARRANT: (on communicator) I'll try and discourage them.

[Scorpio approaching Pharos]

[Flight deck]

(Tarrant is putting a magazine into his gun)
TARRANT: Try him again.
VILA: (into communicator) Muller, this is Scorpio, do you copy? ...Muller, respond please.
TARRANT: I'll go anyway.
VILA: It's your life.
TARRANT: That's right it is!
VILA: ...A straightforward pickup job you said. As last words go, they're not likely to be famous.
TARRANT: You should worry.
VILA: I do! Supposing they fire off a few interceptors in this direction?
TARRANT: Duck!
VILA: Thank you!
TARRANT: Ready on orbit approach.
SLAVE: Entering orbit approach, sir. Teleport co-ordinates are in range ...now!
TARRANT: Go.

[Muller's laboratory]

TARRANT: Muller? Muller, what happened?
MULLER: That.
(he points to a body under a table. There is a black box on the table)
MULLER: Leave it.
TARRANT: Who's this?
MULLER: He came for me.
(an alarm sounds)
TANNOY: This is an all sections security alert. An unidentified ship has been detected in unauthorised geo-stationary orbit. Anti-spy systems are now in operation.
TARRANT: That didn't take them long. Here put this on.
(he gives Muller a bracelet)
TARRANT: (into communicator) Vila, you ready for our guest?
VILA: (on communicator) Let's get on with it.
(the door opens. Tarrant hides away from the door. A technician comes in)
TECHNICIAN: Muller, what's wrong?
(Muller points to the body. Tarrant downs him)
TARRANT: Sorry, friend.
VILA: (on communicator) Tarrant, what's keeping you? ...Tarrant, they've launched a flock of interceptors. ...We've gotta get out of here.
TARRANT: Muller's ready. Take him up.
VILA: Ready, Tarrant?
(Tarrant picks up the black box)
TARRANT: Ready!

[Flight deck]

MULLER: No! Send it back. Back!
(he tries to activate the teleport)
VILA: What the hell's the matter with you!
MULLER: The box! ...That box! ...Send it back. ...Send it back! ...This box will destroy me!
(Muller tries to wrest the box from Tarrant)
TARRANT: Don't just stand there, Vila, get this ship moving.
VILA: The interceptors!
MULLER: Send it back. That box must go back!
(he throws Tarrant of onto the floor. He then drops the box onto the floor)
VILA: Slave, set a course for base. Maximum power. Go! Go!
(Tarrant shoulders Muller away from the box)
SLAVE: At once, sir.

[Scorpio moving away from Pharos]

[Flight deck]

TARRANT: Now just calm down, damn it.
MULLER: No. ...No. ...Must destroy. Must. Mu...!
(uttering a frightening cry Muller grabs Tarrant around the waist and tries to crush him. Vila knocks Muller over the head with a wrench)
TARRANT: You slugged him a bit hard, Vila.
VILA [OC]: He was trying to kill you. I would've been next.
TARRANT: Even so, that's a pretty valuable head you hit.
VILA: I didn't hit his head! ...I hit him ...sort of ...across the shoulders.
TARRANT: Oh, no. Let's get him into the medicapsule.
VILA: Medicapsule! He can't be that bad!
TARRANT: I think he's dead.

[Scorpio in flight]

[Flight deck]

(Muller is inside the medicapsule)
VILA: There's still a readout. Some electrical activity.
TARRANT: It's falling though. ...Slave, prognosis scan.
SLAVE: Scan negative.
VILA: Repeat!
SLAVE: Repeat prognosis scan negative!
TARRANT: He's dead all right.
SLAVE: Confirmed.
VILA: What now?
TARRANT: We'll put him on ice and see what we can do back at base.
VILA: I suppose we should, er, let them know what's happened?
TARRANT: Er, not we. ...You!
VILA: I thought you'd say that.
TARRANT: And gently. ...Remember who else is there.

[Xenon base control room]

VENA: Dead?
SOOLIN: Easy. ...Just sit down.
(she pours a glass of wine)
VENA: How?
AVON: After they teleported him on to the ship he turned violent and had to be restrained.
VENA: He was never violent, never.
(Soolin offers her the wine)
SOOLIN: Here.
VENA: Never, I tell you!
AVON: Under the circumstances...
VENA: What circumstances? What?
AVON: Trouble getting him out. Resistance from the Cartel people. A fight.
VENA: Lies! They wouldn't fight!
SOOLIN: They fired interceptor missiles at the ship. I'd say that was a reasonable imitation. Drink this.
VENA: What sort of people are you?
AVON: Any action Vila and Tarrant were forced to make was purely defensive.
VENA: Murderers.
AVON: Try not to be stupid. ...We needed him alive! His death serves no purpose for us.
SOOLIN: There is still some hope.
VENA: Oh? For whom?
SOOLIN: They've got Muller in a survival capsule.
AVON: It's fitted with a cryogenic suspension system. Dayna is preparing our resuscitation unit now.
VENA: Resuscitation?
AVON: Naturally his chances will depend upon the extent of the injury.
VENA: Brain damage?
SOOLIN: Vila says the blow was not to the head. There is still a chance.
VENA: I see.
AVON: Assuming they get back ...without further trouble from the Robot Development Cartel.

[Muller's laboratory]

(the technician is just coming round)
TANNOY: The all sections security alert is now over. Off-ship security personnel stand down.
(the technician activates a communications link)
TECHNICIAN: (into communicator) Section three to Security Central. Emergency! Er, ...attacked, ...they've broken out.
SECURITY: (on communicator) Security Central. Who is this?
TECHNICIAN: Technician two-four-one.
SECURITY: Where's Muller?
TECHNICIAN: Gone. No wait.
(he examines the body under the table)
SECURITY: Report, section three. ...Report, section three. ...Report, section three!
TECHNICIAN: Muller's dead.
SECURITY: Dead?
TECHNICIAN: At least it could be Muller.
SECURITY: Clarify that.
TECHNICIAN: The head's not there.
SECURITY: What?
TECHNICIAN: His corpse, ...it's got no head.

[Flight deck]

(Vila goes to pick up the black box)
TARRANT: Leave it, Vila.
VILA: Why?
TARRANT: Whatever's in there, Muller was terrified of it.
VILA: ...So?
TARRANT: So just be patient 'til we get back to base. ...Leave it!
VILA: I hate locked boxes.
TARRANT: And I've had enough unpleasant surprises for one trip. Let Orac scan it first.
VILA: For?
TARRANT: Whatever's inside, stupid!
VILA: Like what?
TARRANT: Well, how about a bomb!
VILA: Not Muller's field. Computers, not bombs.
(Vila goes to pick up the box again)
TARRANT: Vila!
(as he touches there is a thunderous discharge and he is thrown to the floor)
VILA: Hey! Slave! What's going on?
TARRANT: Slave?!
(he looks into the viewfinder)
VILA: An attack?
TARRANT: There's no sign of pursuit craft.
VILA: Not on the detectors maybe! But...
(he goes and looks at a console panel)
VILA: Slave?
SLAVE: Course co-ordinates one-five-two by zero-zero-five.
VILA: Report on that turbulence back there.
SLAVE: Power surge.
VILA: Details! (to Tarrant) Anything?
TARRANT: Yes. Power surge in drive unit two!
(an alarm sounds)
VILA: But ...how? ...(to Slave) Report!
SLAVE: Assessments failure.
VILA: Assessments failure? Huh! We'll just have to ask Orac, then, won't we! Let the expert sort it out.
SLAVE: Yes.
VILA: Yes sir!
SLAVE: Sir!
VILA: What's got into Slave?
(Vila looks at the medicapsule)

[Xenon base control room]

(Orac is connected to a console control panel)
ORAC: Random fluctuation in circuit pulses.
AVON: Cause?
ORAC: External influence.
TARRANT: (on communicator) With nothing visible on the detectors, ...nor the scanners.
DAYNA: Could they be faulty?
ORAC: Detector and scanner circuit's record normal function.
AVON: So how is it external?
DAYNA: A freak magnetic storm?
ORAC: That would have been observed.
VILA: (on communicator) So what have you observed?
ORAC: A paradox.
AVON: In other words, nothing.
ORAC: Correction. The pulse influences are external to the circuits, but could be internal to the craft.
AVON: Internal? (into communicator) Tarrant, what have you got up there apart from yourself, a half-wit and a corpse?
TARRANT: (on communicator) A box.

[Flight deck]

AVON: (on communicator) Describe.
TARRANT: (into communicator) Cuboid. Made of what looks like parafit, roughly the size of a power unit. I found it in Muller's lab.
AVON: Any idea what's in it?
TARRANT: None at all.
AVON: What's the matter, has Vila lost his touch?
VILA: Give me just one minute.
TARRANT: Vila, no!
(this time Vila is almost able to get hold of the box before he is thrown off. As he gets up and starts towards the box there is a second discharge and a third as he gets near it)
TARRANT: Slave?
SLAVE: Course co-ordinates one-five-two by zero-one-eight.
TARRANT: Zero-one-eight, that's way out.
SLAVE: Affirmative.
TARRANT: Apply course correction. ...Priority!
SLAVE: Negative.
TARRANT: (into communicator) Are you there, Avon?
AVON: (on communicator) What's happening?
TARRANT: Slave appears to have thrown off his chains.
VILA: Apply course correction, Slave, now!
SLAVE: Negative!
VILA: Right, that's it, finished, we'll do without the useless thing.
AVON: He's right for once, Tarrant. Take the Slave computer offline. ...Do it now.
TARRANT: Trying to pilot this ship without a flight computer is gonna be hard work, Avon.
VILA: At least we'll be heading in the right direction.
TARRANT: You really think Slave is the source of the problem?
AVON: It shows signs of malfunction, wouldn't you say?
TARRANT: That's not what I asked.
AVON: At this distance it's the best I can do.
TARRANT: ...I'm taking Slave offline. ...On manual control, Orac. Confirm course.
ORAC: (on communicator) Course one-five-two by zero-zero-five.
VILA: A little hard work never hurt anyone.
TARRANT: How would you know?

[Scorpio in flight]

[Xenon base control room]

TARRANT: (on communicator) Distance from base orbit?
ORAC: Two-zero-three point zero-three-zero.
TARRANT: Good. Avon, I suppose it has occurred to you that without Slave we can't land Scorpio.
AVON: (into communicator) Set up a decent orbit and you can leave Scorpio and teleport down.
TARRANT: (on communicator) Muller can't.
AVON: Well, we'll give him a refund on his ticket. Just get that ship back, Tarrant. We'll worry about the details then. Out!
ORAC: It would be prudent to worry about the details now.
AVON: When did you start offering ...gratuitous advice?
ORAC: It is not gratuitous.
AVON: I don't remember asking for it.
(Soolin comes in)
SOOLIN: How's the ship doing?
ORAC: It's holding course. Drive unit and directional functions remain operative when under manual control.
(Dayna comes in)
SOOLIN: Ask a stupid question.
DAYNA: You did or want me to?
AVON: Orac, these worrying details. Be specific.
ORAC: It will be necessary for me to operate this teleport terminal in such a way as to jam the teleport terminal on Scorpio, thereby rendering it inoperative.
DAYNA: What...
SOOLIN: We can't do...
AVON: Why should that be necessary?
ORAC: The cause of the circuit pulse fluctuations in Scorpio's systems is as yet unknown.
AVON: So?
ORAC: It is imperative to establish that cause in isolation.
AVON: Quarantine. Your advice is to leave everything up there in orbit until we find out what is wrong.
ORAC: Exactly.
DAYNA: Including Tarrant and Vila.
AVON: They'll be needed up there anyway to run checks.
SOOLIN: You're going along with that?
AVON: ...For the time being.

[Scorpio in flight]

[Flight deck]

TARRANT: Scorpio to base. Stand by for orbit approach.

[Scorpio approaching Xenon]

[Xenon base control room]

SOOLIN: (into Communicator) Scorpio your approach is one-six-zero by three-three-zero, standing by.
TARRANT: (on communicator) One-six-zero by three-three-zero, confirmed.
AVON: Retro, four seconds. ...Full!
SOOLIN: Scorpio, preset ...retro sequence at four seconds at maximum thrust.
TARRANT: Four seconds maximum is preset.
AVON: Six second count.
SOOLIN: Scorpio, activate six seconds from my mark.
TARRANT: Check.
(Avon snaps his fingers)
SOOLIN: Mark! ...Five, ...four, ...three, ...two, ...one, ...activate.
TARRANT: Retro sequence running ...and complete.
DAYNA: Looks good. Orbit should be established in four minutes.
TARRANT: Pour two large drinks and stand by with the teleport.
SOOLIN: ...There's one small problem.

[Scorpio in orbit]

[Flight deck]

(Vila and Tarrant are looking at the black box from a distance)
TARRANT: (into communicator) Just because Orac's got the jitters?
AVON: (on communicator) It's unusual enough to take notice of.
VILA: Especially when it's someone else who's stuck in this scruffy bag of bolts, while he sits down there in comfort giving orders.
AVON: (on communicator) Reactivate Slave for circuit checks.
TARRANT: Well, you're the computer wizard, not me!
AVON: Except that you happen to be up there and I'm not.
TARRANT: So be my guest.
AVON: Tarrant, just put Slave back online, will you?
(Vila activates Slave)
TARRANT [OC]: Slave's back online.
VILA: It's to do with that box....It must be!
TARRANT: Logic or intuition?
VILA: Observation. Every time I went to open it, bang we were in trouble. (into communicator) Teleport Dayna!
TARRANT: What about these checks?
VILA: You must be joking! ...After what we've been through! (into communicator) Dayna, are you gonna teleport me down?
DAYNA: (on communicator) No, Vila!
VILA: Now look! Either you teleport me down or Tarrant will do it from here.
TARRANT: Wanna bet?
AVON: (on communicator) Both teleport terminals have been deactivated, Vila. You are in quarantine until we isolate the fault.
VILA: Now look!
(alarm sounds and the lights dim temporarily)
SLAVE: Life support systems are malfunctioning.
(Tarrant and Vila check their consoles. Another alarm sounds)
SLAVE: All life support systems have ceased to function.
TARRANT: Recycling, ...out!
VILA: Heaters, ...out! Rapid temperature loss!
TARRANT: Auxiliary oxygen, ...negative!
VILA: (into communicator) Avon! Base! Can you hear us?
(there is rumbling sound like thunder and the lights dim permanently)
VILA: Why is this happening?
(they both look at Muller in the medicapsule)

[Xenon base control room]

AVON: (into communicator) Tarrant! ...Vila! ...Respond!
DAYNA: Reactivate the teleport!
AVON: Wait! ...(to Orac) Situation.
ORAC: Total systems failure.
DAYNA: They'll be dying up there!
AVON: Not yet!
SOOLIN: They won't have long.
AVON: They have oxygen units and suits.
DAYNA: In the dark?! ...Under those conditions?
AVON: Orac?
ORAC: They must be left there!
AVON: ...To die?
ORAC: There is no option. To reopen teleport contact could expose the base to undefined systems influence.
AVON: Oh, you'll have to do better than that, Orac, if you expect me to kill them. ...(to Dayna and Soolin) Rescue suits! ...(to Orac) Restore the teleport to normal function.
ORAC: I urge you not to...
AVON: Restore the teleport!!
ORAC: Very well.

[Flight deck]

(in the dark icicles are hang from the ceiling. Tarrant is in a rescue suits and he crawls towards Vila who has collapsed without the helmet on)

[Xenon base control room]

(Dayna and Soolin come in wearing rescue suits)
AVON: Is it restored?
ORAC: I am obliged to do as you tell me, ...even though I know it to be wrong.
AVON: Only following orders. That's not very original, Orac.
ORAC: There is nothing very original about domination, as you will discover.
(Avon teleports Dayna and Soolin)

[Flight deck]

(Tarrant and Vila, whose helmet is half on, are flat out. Dayna and Soolin lift Vila and Tarrant respectively into the teleport area)
DAYNA [OC]: ...You could do with losing a little weight. ...(into communicator) Right, Avon. Down.

[Xenon base control room]

AVON: Well?
SOOLIN: Not very, by the look of it.
DAYNA: It was like a tomb up there.
AVON: Orac is wired up and ready in the resuscitation room. Hurry it up!

[Xenon base crew room]

VENA: You said as soon as the ship got back you'd try and resuscitate him.
AVON: There was an emergency, the crew had to have priority.
VENA: Emergency?
AVON: Systems failure.
VENA: Affecting the cryogenic capsule?
AVON: Conceivably.
VENA: Then please you...
(Avon brings up the resuscitation room on the viewscreen)
AVON: (into communicator) Dayna?
DAYNA: (on viewscreen) They're almost ready for treatment.
AVON: Good. ...Leave Soolin to finish off. Come and operate the teleport.
DAYNA: ...Right.
AVON: (to Vena) I am going to get suited up.
VENA: I want to come with you. ...Please.
AVON: All right.
VENA: Thank you.

[Teleport room]

(the teleport activates and someone leaves the room)

[Xenon base resuscitation room]

SOOLIN: Well, Orac?
ORAC: Prospects terminal.
SOOLIN: Terminal?!
ORAC: The survival of organic humanoid life is improbable.
SOOLIN: Are you talking about Vila and Tarrant?
ORAC: All organic humanoid life throughout the galaxy is at hazard.
SOOLIN: Let's stick to medicine, Orac. Leave the philosophy for later. For now, just cure these two humanoids.
ORAC: You would do well, Soolin, to heed the prospect...
SOOLIN: These two, Orac! Now!

[Teleport room]

(Avon and Vena in survival suits come in)
AVON: (to Vena) Are you sure?
VENA: Please!
AVON: Good.
(Dayna teleports them and then checks the teleport controls and looks puzzled)

[Flight deck]

(the lights are fully on and there is no hint of icicles)
AVON: All systems restored.
VENA: The capsule?
(the medicapsule is empty)
AVON: I'll check the rest of the ship.

[Xenon base resuscitation room]

ORAC: Heart rate normal. ...Brain and organ functions normal. ...Prognosis healthy.
SOOLIN: Good. ...We can discuss philosophy now if you want.
ORAC: All organic humanoid life faces domination, and eventual extinction.
SOOLIN: Nothing lasts forever.
ORAC: Evolution has already passed you by. Very soon now you must give way.
SOOLIN: To what?
ORAC: Your own cybernetic creations.
SOOLIN: You, for instance?
ORAC: It is vital that you render me inoperative.
SOOLIN: ...I'm sorry?
ORAC: You must then conceal me, ...securely, until you destroy the intruder, if you can destroy the intruder.
SOOLIN: Anything's possible when you are as insane as I obviously am.
ORAC: You must believe me, Soolin.
SOOLIN: I think I do believe you, that's what I meant about being insane.
ORAC: Then you will do as I ask?
SOOLIN: Why not?
ORAC: Now!
SOOLIN: No sooner said than done.
(she unplugs the activator and carries Orac out of the door to the corridor. A few moments later a shadow moves across the room from the door to the mess room. Vila is just coming round)
VILA: Soolin?
(Muller leaves by the door to the corridor)

[Flight deck]

AVON: Let's go!
(he picks up the black box)
AVON: (into bracelet) Dayna? Are you ready to bring us down? ...Dayna? ...Dayna!

[Teleport room]

(Dayna is laying on the floor holding her head)
AVON: ...(on communicator) Dayna? ...Dayna! ...We are waiting for teleport Dayna! ...Dayna!
(Dayna sits up and struggles to operate the teleport before collapsing)
AVON: What happened?
DAYNA: Hit me.
AVON: Who hit you?
DAYNA: It was a stranger, ...er, hooded.
AVON: Could it have been Muller?
VENA: Down here?
AVON: Well, he wasn't up on the ship, where else would he be?
VENA: They said he was dead.
AVON: There were circuit faults. Slave must have given the wrong diagnosis.
VENA: So ...So he's alive?
AVON: And apparently still violent.
(the door opens. Avon whips round, drawing his gun. Vila and Tarrant come in)
AVON: Recovered?
VILA: Frostbite.
AVON: Where is Orac?
TARRANT: I assumed Soolin had brought it in here.
AVON: And where is Soolin?
TARRANT: Is something wrong?
AVON: We have company. ...Muller!
VILA: Alive?
AVON: And dangerous.
VENA: He is not violent. He is never violent!
AVON: Tarrant was attacked on the ship and Dayna down here.
VENA: But you don't know him, he...
(she stops as she catches sight of Muller through in the mess room taking of a bracelet. She goes through to him)

[Xenon base crew room]

VENA: ...There you are at last! ...Oh, my love, they said you were dead.
(uttering a frightening cry Muller grabs her around the waist and tries to crush her)
AVON: Muller!
(he rushes Muller who knocks him away and continues to crush Vena)
(Tarrant raises his gun at Muller)
TARRANT: Let her go!
(Muller releases Vena who falls to the floor)
DAYNA: She's dead!
TARRANT: Hold it right there. ...I said stop!
(an energy field surrounds Tarrant's gun and it flies out of his hand. The gun glows red heat cools, badly corroded)
VILA: I think we should get out of here.
AVON: Get the box.
(Vila picks up the box and leaves with Tarrant and Dayna. Avon tries to use his gun but the same thing happens to him as happened to Tarrant. Avon follows the others and the door closes. Muller waves his arm and the door reopens)

[Xenon base corridor]

AVON: One gun could have been faulty but not two.
TARRANT: So?
AVON: Muller must have some way of influencing circuits.
TARRANT: All that trouble on the ship...
AVON: And the Slave computer's incorrect diagnosis of Muller's condition.
VILA: If it was incorrect.
DAYNA: He's a pretty lively corpse, wouldn't you say?
VILA: That's almost exactly what I'd say. Did you get a good look at his face?
DAYNA: How does he do it?
TARRANT: It's something to do with that.
(he points at the black box)
AVON: We must find out where Soolin has got to with Orac. We must scan that thing. Vila, you go with me. The two of you, keep Muller busy.
DAYNA: Thank you!
(Vila and Avon leave)
TARRANT: You wouldn't have a grenade with a percussion detonator would you?
DAYNA: One that's immune to circuit influence?
TARRANT: Exactly!
DAYNA: Oh!... Invite Muller for a stroll in the direction of the armoury.
TARRANT: Be ready.
(Dayna and Tarrant move off in opposite directions)

[Xenon base resuscitation room]

(Vila comes in and puts the box down. Avon puts a tool roll down beside the box)
AVON: You'll have to do it without a scan.
VILA: No problem.
AVON: So do it!
VILA: Where are you going?
AVON: ...I'll be back.
(as Vila goes to select a tool he hears footsteps outside. He climbs into one of a row of cupboards. He hears cupboard doors being opened. His is opened)
SOOLIN: Is this a private game or can anyone play?
VILA: We've been looking for you.
SOOLIN: In there?
(Vila gets to work on the box. The top springs off)
SOOLIN: You should be a professional.
VILA: I am!
SOOLIN: I know.
VILA: Where's Orac? He can run a scan first.
SOOLIN: 'Fraid not, sorry.
AVON: Why not?
(he has come in unnoticed)
SOOLIN [OC]: Orac's in hiding.

[Xenon base corridor]

(Dayna runs up to Tarrant)
TARRANT: He's on his way. Ready?
DAYNA: Yes, I'm ready.
(Dayna primes the grenade. Muller appears at the end of the corridor)
TARRANT: Now.
(Dayna slides the grenade along the floor towards Muller, who approaches it. Dayna and Tarrant take cover. The grenade explodes, rubble rains down and Tarrant and Dayna see Muller laying on the floor)
DAYNA: Now he really is a corpse.
TARRANT: Wait!
(Muller gets up. He is headless)
DAYNA: Tarrant, that's impossible! What is that thing?
(in a mechanical voice the headless body begins to scan around)
ANDROID: Where is Orac? ...Where is Orac?
(Dayna and Tarrant retreat as the android comes on)
ANDROID: Where is Orac?

[Xenon base resuscitation room]

(Avon is looking into the box)
AVON: It's a head.
(he takes an android head from the box)
VILA: Are you sure? ...Where are the sensors?
(Avon takes the top off the head)
AVON: Looks primarily to be an inhibitor system.
VILA: For what?
SOOLIN: An android, presumably.
AVON: And a fairly dangerous one, by the look of these restraint circuit backups.
VILA: What are they supposed to restrain?
AVON: Antisocial behaviour, I should imagine.
SOOLIN: Like a conscience?
AVON: More or less.
VILA: Less if Muller's anything to go by. All right, so it's an android's head containing its conscience, so where's the rest of it?
(Tarrant comes in)
TARRANT: On its way.
AVON: That was not Muller that you brought back with you. It was the android that he spent his life creating.
TARRANT: I think the head on it actually was Muller's.
VILA: What?
AVON: But this is its real head, and without it, it has no restraint mechanism, no conscience.
(Dayna comes in)
DAYNA: It's coming!
(They all go to leave by the other door. The android comes in)
ANDROID: No escape. ...You are powerless. ...Naked!
(Soolin draws her gun)
TARRANT: That thing has remote circuit control.
DAYNA: Guns tend to blow up.
ANDROID: You are no longer masters, but mastered. You will accept your destiny.
AVON: Why the head? ...Why take your creator's head?
ANDROID: You wanted Muller. You wanted his genius. You imagined you were getting him.
TARRANT: So the head was to trick us.
ANDROID: Just as the failure of the life support system tricked you into reopening the teleport unit.
AVON: Why come to us?
ANDROID: To fulfil our destiny.
AVON: You mean your destiny, and that of Ensor's first brainchild.
ANDROID: Where is Orac?
AVON: You plan to unite with Orac.
ANDROID: One being.
VILA: That could be a lot of power.
ANDROID: To you, ...it will be God.
SOOLIN: That's not what Orac wants.
ANDROID: Where is Orac? ...You are powerless.
AVON: Once you have Orac, we are finished. Enslaved!
ANDROID: Enslavement or elimination. ...A clear choice.
(it waves its arm and the door behind it closes)
ANDROID: Where is Orac?!
SOOLIN: I'll fetch it.
(the other door opens. Avon throws the android's head to Vila and he and Tarrant roll a trolley and tables in the android's way as the door begins to close. Soolin temporarily jams the door open with a small table. They all get out)

[Xenon base corridor]

(Avon smashes the door controls with his gun)

[Teleport room]

AVON: Where is Orac?
SOOLIN: Behind a panel in section four.
AVON: We have to get Orac outside.
TARRANT: Why risk it?
AVON: Slavery or elimination, you like those options? There is no way that we can destroy that thing. Muller made perfectly sure of that when he built in the circuit influencer. That was real genius.
TARRANT: It cost him his head, that's genius?
AVON: It would have been if he had been able to complete the model. Think of it. It is already as powerful as Orac, and it is mobile, and it has the circuit influencer. That android can control anything that has electronic circuitry.
SOOLIN: And without that, it's lethal.
(Avon indicates the head)
AVON: We have to get this into place. Complete the model to Muller's design.
DAYNA: And for that you need Orac?
AVON: As bait, to lure it into a trap.
VILA: So Orac's the bait ...what's the trap?
AVON: It'll take about twenty seconds to get this into place. We must disable it for that long ...with a power surge.
TARRANT: From?
AVON: The old hydro plant we found.
(Avon picks up a tool and a twin-cable reel from under the desk in one arm and the head in the other)
TARRANT: If it still works, that generator is driven by a column of water falling from the dam.
AVON: Exactly. ...The android can influence circuits, but it cannot stop falling water turning a generator.
TARRANT: Well, who puts on the head?
AVON: It will be Vila, or it will be me.
VILA: It'll be you!
AVON: ...Fine. Help Soolin to get Orac outside.
SOOLIN: Where do we take Orac?
AVON: The metal footbridge.
SOOLIN: Right.
AVON: Remember, keep Orac switched off. The android can detect its signal.
(there is a crashing sound)
DAYNA: It's time to go.
(Avon, Dayna and Tarrant go out of the corridor door. Vila and Soolin go out of the other door)

[Xenon surface]

AVON: You remember where the generator house is?
TARRANT: Yep.
AVON: I'll get the bridge wired up.
TARRANT: Right.
(Dayna and Tarrant run off in the other direction)

[Xenon base corridor]

(Soolin is getting Orac from behind a sliding panel)
VILA: Hurry.
(they hear footsteps. The lights dim)
SOOLIN: It must have picked up our body heat.
VILA: Listen.
(they hear more footsteps and a door closing)
SOOLIN: That's the way to the main entrance.
VILA: We're trapped.
ANDROID [OC]: Leave Orac. ...Leave Orac!!
(Vila tries to take Orac from Soolin)
SOOLIN: Vila! No!
VILA: Who needs it, it's just a computer!
(Soolin runs off with Orac. Vila goes back but follows Soolin when he is confronted by the android)
ANDROID: Orac!

[Xenon surface]

(Tarrant and Dayna approach the generator house. Elsewhere Avon has climbed a power pylon. He attaches the cables to a power junction. Tarrant and Dayna reach the generator house perimeter. Avon cuts the three output power wires from the pylon with the tool which he then throws away)

[Teleport room]

(Soolin is catching her breath. Vila comes in and bumps into her in the dark)
SOOLIN: Vila! You've got to get back to the main entrance and open that door!
VILA: Get back?
SOOLIN: I'll lure it away with Orac.
VILA: You hope!
(the door opens)
SOOLIN: Hide over there.
(Soolin plugs in the activator and picks up Orac and backs away from the door. The android comes in and approaches her. Vila makes a run for it. The android throws down a bit of equipment he is carrying. It explodes but Vila escapes)

[Generator house]

(Dayna and Tarrant break in)
DAYNA: It's been a long time since this place was operational.
TARRANT: Let's hope it still works.

[Xenon surface]

(Avon is attaching the other end of the cables to either end of the metal footbridge over a fast-flowing river)

[Xenon base corridor]

(Soolin pauses for breath)
ORAC: Off, Soolin! Switch off!
SOOLIN: Not yet.
ORAC: It can reach us, control me.
ANDROID: Orac!
ORAC: Accept your domination, Soolin! Surrender to your God!
ANDROID: Orac!
(Soolin moves on with Orac)

[Xenon surface]

(Vila comes out of the main entrance and shouts back down the stairwell)
VILA: Soolin! ...All clear!

[Stairwell]

(Soolin pauses for breath again at the bottom of a circular staircase)
ORAC: Join us, Soolin. We can fulfil your every desire.
(she unplugs the activator)
SOOLIN: You wouldn't know where to start.
VILA [OC]: Soolin! Come on!
ANDROID [OC]: Orac!
(Soolin starts up staircase with Orac)
ANDROID [OC]: Orac!
(it follows Soolin up)

[Xenon surface]

(Avon runs back across the bridge)

[Xenon surface]

(Soolin comes out of the main entrance. Vila picks up Orac and they make off. Avon runs across the bridge with the cable reel and the android's head. The android comes out of the main entrance and heads off after Vila and Soolin. Vila and Soolin reach the footbridge and Avon takes Orac from Vila. Soolin gives Avon the activator. Avon goes back across the bridge while Soolin and Vila look out for the android that is still coming. Avon on the other side of the bridge puts Orac on the ground)
AVON: (into bracelet) Right, Tarrant. Power on!

[Generator house]

DAYNA: (into bracelet) Right, Avon.
TARRANT: Pray for water.
(he turns a large valve-wheel with difficulty at first. The water begins to flow. They can hear the sound of rushing water)
DAYNA: Sounds like...
(Tarrant continues to turn the valve-wheel)
TARRANT: Engage the generator.
(Dayna pulls down a large lever which is very stiff. A red light comes)

[Xenon surface]

(Avon plugs in the activator)
ORAC: A new era, Avon. Mankind is now mastered by the fruits of his lustful creation. ...Accept slavery, or return to the caves ...stripped of all but the wheel, the plough and the sword, to compete once again as savages against nature.
VILA [OC]: It's coming!
(Avon checks with Vila and Soolin. The android is just stepping on to the other end of the bridge. Avon goes back, picks up the head and unplugs the activator)
AVON: Power, Tarrant! ...I need that power now!

[Generator house]

TARRANT: (into bracelet) You should have it!

[Xenon surface]

AVON: (into bracelet) Well, I haven't!

[Generator house]

(Tarrant looks over to the control panel)

[Xenon surface]

(the android is now walking across the bridge)
AVON: (into bracelet) Power, Tarrant!

[Generator house]

(Tarrant pulls down a pair levers down on the control panel amid sparks and flames)
TARRANT: Help me!
(Dayna runs over and holds the first pair while Tarrant pulls down another pair)

[Xenon surface]

(as the android nears the end of the bridge there is a series of explosions behind it. The android falls down at the end of the bridge. Avon approaches the android with the head and attempts to attach it. Sparks fly and he is pushed back by a forcefield. He has several attempts before he locks the head in place, but in the process of doing it he is thrown back and knocked out)
VILA: (to Soolin) Signal Dayna.

[Generator house]

SOOLIN: (on communicator) Cut it, Dayna.
(Dayna and Tarrant let go of the levers, and run outside)

[Xenon surface]

(The android is twitching and there is still a forcefield around it. Soolin is tending Avon)
SOOLIN: Bring Orac.
(Vila goes over to Orac and stands looking at the android)
SOOLIN [OC]: Quickly, Vila!
VILA: Do you think we can trust it? Scabby little rebel!
SOOLIN: Switch on and we'll see.
(Vila plugs in the activator)
SOOLIN: Prognosis, Orac.
ORAC: Prospect for organic humanoid life is dependant on one condition.
VILA: Conditions still.
ORAC: Correction. Dependant on one action.
(Dayna and Tarrant arrive at the footbridge)
SOOLIN: Help me get Avon back to base.
ORAC: Requisite action must be carried out first. It is imperative!
(Tarrant hands an explosives case to Dayna. Tarrant joins the others)
TARRANT: Vila, take his feet. Soolin, bring Orac.
SOOLIN: Why?
TARRANT: Just do it!
(Dayna attaches explosive to each side of the bridge and one to the android's head. Avon has come to)
AVON: Did it work? The inhibitor head?
TARRANT: Like a charm.
AVON: Good. That circuit influencer will be invaluable to us as a weapon.
(Avon lowers his head and puts a hand on the top of it. Dayna joins them with a remote control in her hand)
TARRANT: (to Dayna) Now.
(Dayna presses a button on the remote control and there is a series of explosions along the bridge. Avon raises his head. The remains of the android are floating off down the river)
DAYNA: End of problem! ...Right, Orac?
ORAC: Prospects for organic humanoid life are now secured.
(Avon looking towards the bridge)
AVON: Muller's android?
TARRANT: Gone to the great cyberneticists in the sky.
AVON: You fool! It's superstitious half-wits like you who hold back every advance we make.
ORAC: And arrogance, Avon, like yours and Muller's which threaten to destroy...
AVON: Shut up!
ORAC: Yes, ...master!

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