Orac
Original Airdate: March 27, 1978

[Liberator in flight]

[Rest and recreation room]

(Gan comes in and takes a tablet from a medical kit, washes it down and sits down on a recliner. There is a planet out of the window)

[Flight deck]

(Blake comes in)
BLAKE: How are you feeling, Jenna?
JENNA: I'm managing.
BLAKE: Zen, give me full recall of my supplementary to the flight log data. Vision suite, line one.
ZEN: Line one is linked and ready to accept.
BLAKE: Avon, I want you to listen to this.
(Blake and Avon move to the vision suite. They sit at a table with two chairs. Blake inserts three cards into slots on the table's surface)
AVON: What is it?
BLAKE: Just watch and listen.
(he operates a control alongside the slots. A projected image appears on the wall showing the Spacemaster spiralling towards Cephlon. Scenes from 'Deliverance' follow)
BLAKE: (recording) Flight log entry four-three-one. Time co-ordinate six-six-two. Liberator was in range of the planet Cephlon. Scanner systems located a space vehicle which was clearly out of control. It was put on routine security surveillance and was identified as a Spacemaster series five. Retrieval pictures confirm. There was an explosion on board and the ship went out of control. Cephlon's gravity pulled her down into the atmosphere and she started to burn up. Two life support capsules ejected from the ship and our tracers followed them to impact. Vila, Jenna, Gan and Avon teleported down to the planet in an attempt to find the survivors. Both capsules were found. In the first the crewman was already dead. In the second a man called Ensor was badly injured. We teleported him to Liberator. Before he died he gave me a box containing micro power cells. (Blake has the box and opens it) He insisted that we should take these to the planet Aristo, since without them his father would die. He also spoke of something called 'Orac' and claimed the Federation was willing to pay one hundred million credits to obtain it. Verbal supplementary closes.
AVON: Well?
BLAKE: Well, if the Federation is prepared to pay one hundred million credits then Orac must be fairly important.
AVON: Unless, of course it's a magnificent swindle, but I suppose that's too much to hope for.
BLAKE: You all right?
AVON: Ah, yes. I... I just felt a little dizzy, that's all.
BLAKE: My point is there's something we're missing in all this.
AVON: Well, I can't think what, it all seems straightforward enough. We know from the ship's log that it was returning to Aristo from Federation Space Headquarters, that the other passenger was a doctor and that they were carrying medical supplies. It all tallies with what Ensor said.
BLAKE: I don't know. I think it's the importance the Federation is placing on Orac that bothers me
JENNA: I've switched to automatics. ...There's something I want from my cabin.
BLAKE: All right, Jenna. (to Avon) Let's take another look at the pictures of that ship on the main screen.
AVON: They're not likely to show us anything that we don't already know.
BLAKE: Maybe not, but let's check anyway. Zen, run the scanner file from the moment we picked up visual contact with the Spacemaster ship.
ZEN: Confirmed. Retrieval systems operating.
AVON: What exactly are you looking for?
BLAKE: I'm not sure yet. ...You quite sure you're all right?
AVON: ...Yes, of course I'm all right.

[Corridor]

(Jenna is walking slowly, puts her hand to her head and begins to stumble. Cally comes round the corner and catches hold of her)
CALLY: Jenna, what is it? what's the matter?
JENNA: I don't know. I, I feel terrible. One minute I'm all right, and then ...then it comes over me again.
CALLY: Oh, you've obviously got a fever. Come on, I'll get you to your cabin.

[Flight deck]

(on the main viewscreen the explosion of the Spacemaster is playing)
BLAKE: Zen, hold it there. Now then, play it back, slowly. There! That's it, that's what's been bothering me.
VILA: I don't see anything special.
AVON: It's in the wrong place.
BLAKE: Exactly. The explosion's in the forward section. Now, you thought it was a neutron burn out but that's nowhere near the engine housing.
AVON: All right, but it doesn't make any difference, does it?
BLAKE: Zen, I want the sensor reading for that moment. Full spectrum analysis.
ZEN: Confirmed.
VILA: What are you trying to prove?
BLAKE: Ensor went to Federation Space Headquarters. He wanted medical assistance. He also wanted to sell something of enormous value.
VILA: Orac.
BLAKE: Right.
AVON: Whatever that is.
BLAKE: We can presume the sale was made because he told us they're prepared to pay a fantastic price for it. Now, they start on the return journey...
ZEN: The data you requested is now available.
BLAKE: All right, let's have it.
ZEN: Sensor readings for selected moment are as follows. The explosion registered one point three. Disturbance peaked at one-one-five. Spectral analysis of residual vapour confirms presence of Geritan explosive.
BLAKE: Conclusion?
ZEN: Probability is that a small explosive device was detonated in the gravity compensator controls.
AVON: Sabotage!
BLAKE: Yes.
VILA: But why?
AVON: Presumably so that the Federation could get their hands on Orac without paying a hundred million.
BLAKE: That's the only thing that would make sense.
VILA: So they'll be on their way to pick up Orac as fast as they can go, and that's fairly fast actually.
BLAKE: Yeah, not as fast as us.
AVON: Ever the optimist.
CALLY: Blake.
(she has come in and is carrying an instrument)
BLAKE: What is it?
CALLY: Jenna is very sick. Gan is, too. They've both got the same symptoms.
BLAKE: What's wrong with them?
CALLY: I want to make a test. Avon, give me your hand.
(she passes the instrument over the back of Avon's hand. It clicks noisily)
CALLY: (to Vila) Now yours.
(she does the same with Vila)
CALLY: The same as the others. They've all absorbed heavy doses of radiation.
VILA: Radiation! All of me?
CALLY: The four of you went down to the surface of Cephlon, but you stayed down too long, far beyond the tolerance limits. You need treatment and you need it quickly.
VILA: Well, what are we waiting for? Let's get to the surgical unit.
AVON: Relax. We'll all go onto a massive dose of decontaminant drugs. In a week or two we should all recover.
CALLY: Not possible.
BLAKE: Why not, Cally?
CALLY: There are no decontaminant drugs on the ship. I've checked. There is nothing that will counter radiation sickness.
BLAKE: Are you sure?
CALLY: I'm sure.

[Rest and recreation room]

(Gan is listening to the conversation on the flight deck over the communicator)
BLAKE: Our only hope is if they have a supply on Aristo.
VILA: But if they don't?
BLAKE: They will have.
VILA: But if they don't?
BLAKE: They will have.
AVON: There's no point in hiding it, our condition will deteriorate rapidly. If we don't get drug treatment very soon, we shall die.

[Flight deck]

VILA: Die? I can't do that.
AVON: I'm afraid you can. It's the one talent we all share, even you.
VILA: I think I'm going to...
(he runs off putting his hand over his mouth)

[Aristo as Liberator approaches]

[Ensor's laboratory]

(Ensor, is looking at some fish in an aquarium)
ENSOR SR.: Hello, my little ones. Hm, ah, you hungry then, are you? Let's give you something to eat, then, mm? (having sprinkled some food into the aquarium and, with birdsong in the background, he then looks at some plants) Oh dear, you're a bit dry, aren't you, mm? (he turns on a shower briefly) That's better. That's better, that's better. Oh! Ugh! (he winces with pain and goes and relaxes on a reclining chair. Immediately his alarm watch goes of and he goes and turns off the bird song that is coming from a metal bird in a cage. He unzips his shirt and goes over to a bench and connects a cable to a printed circuit attached to his chest. A switches on a meter and the needle just passes halfway) Oh. Not good, (he switches off the meter with a green button and disconnects the cable) ...not good at all. Very little time left. Oh. (he goes over to a bench and while he is drinking blue liquid from a glass there is an electronic beeping sound) Oh, yes, what is it? Have you something to report?
ORAC: A space vehicle has made a surface landing about seven miles inland.
ENSOR SR.: My son's ship?
ORAC: No.
ENSOR SR.: Ah, stupid question, I apologise. Had it been his he would have contacted us by now. Have you identified the ship?
ORAC: Federation. Two passengers now disembarked and proceeding on foot towards this section.
ENSOR SR.: Is the defence zone operating?
ORAC: Yes.
ENSOR SR.: Then they won't get far. Anyway, ensure that security regulations are fully maintained. Ah! Can't be too careful in my state of health. (he switches the bird song back on) Oh. Ugh. Sleeping seems to reduce the energy drain fractionally. Might as well prolong me life to the very limit. One clings to it, clings to it. Keep your eye on the two from the Federation ship.
ORAC: They might attempt entry through the tunnels under the old city.
ENSOR SR.: Oh, they can't us reach that way. You know that, those tunnels are crawling with Phibians.
ORAC: I was suggesting it might be more humane to warn them of the danger.
ENSOR SR.: Had they been friendly they would have tried to make contact before landing. They didn't. Therefore they are not friends, therefore they are enemies. What could they want here, hm? Ha. Only one thing. You, Orac, my friend, you. Oh, let the Phibians have them.

[Aristo beach]

(Travis passes an obelisk)
SERVALAN: Travis ...here!
(he joins her and opens a trap-door in the ground)
TRAVIS: There must be an easier way to get into the laboratory than this.
SERVALAN: The surface force barrier is impenetrable. We must go under it.
TRAVIS: Let's see the old man's map again.
SERVALAN: We go straight along this passage, turn right at the junction, and then straight on.
TRAVIS: Yeah, they begin to run below sea level there. ...Let's hope they're not flooded.
SERVALAN: Well, let's get started.
TRAVIS: Right.

[Tunnel]

(They descend into a damp tunnel)
SERVALAN: Travis!
TRAVIS: Huh?
SERVALAN: It's this way.

[Rest and recreation room]

(Avon, having watched a planet go past the window, goes to recline beside Gan. Blake comes in)
BLAKE: I've had Zen run through the reference banks. A remarkable man, this Professor Ensor, very impressive list of achievements.
AVON: Yes, I know. When he was eighteen years old he developed something called a Tarriel cell. It led to a whole new generation of computers. Every computer in the known worlds now contains Tarriel cells. He also engineered and developed a lot of radical new concepts in computer technology, so that even the most advanced computers are based on his work.
(Aristo comes into view through the window)
AVON: It's a surprise to me that the Federation ever let him go.
BLAKE: They didn't ...well, not exactly.
(Cally comes in)
BLAKE: How are they?
CALLY: Well, much the same. Until they get treatment the only change can be for the worse.
BLAKE: Who's at the controls?
CALLY: Jenna is.
BLAKE: Well, we're nearly there, another hour.
AVON: It's ironic isn't it ...we are racing to deliver medical supplies that will save a man's life in the hope that he will have medical supplies that will save ours.
BLAKE: Zen gave me something else that would explain why he needs those micro power cells.
(Blake switches on a miniature viewscreen in a free-standing console)
BLAKE: Zen, report. ...Medic information 'Ensor'.
ZEN: It appears that Ensor took a vacation on a frontier planet. While there he suffered a massive heart attack. Medical facilities were primitive. The only available transplant was a mechanical heart powered by micro cells. They have a life of about forty Earth years.
BLAKE: All of which happened about forty years ago.
CALLY: But didn't they substitute an organic unit once he got back?
BLAKE: That's just the point, he never did get back. He disappeared. He and his four-year old son simply vanished. They've never been heard of since.
AVON: Until now.
CALLY: And all the time they've been on Aristo.
BLAKE: Cally, we'd better get ready to teleport down.

[Flight deck]

BLAKE: D'you think you'll be up to handling things in here?
JENNA: Oh, assuming you don't take too long.
BLAKE: Zen, surface conditions?
ZEN: Tolerable. The landmasses are arid and support only primitive plant life. Nine tenths of the planet is covered by water which is highly acidic. The level of the oceans is constantly rising and they now virtually cover all traces of the cities built by early civilisations.
BLAKE: Lifeforms?
ZEN: Life is evolving in the oceans. An amphibian species have begun to develop.
JENNA: Anything else?
ZEN: This constitutes all available data.
JENNA: Well, at least there won't be too many natural hazards for you to deal with.
BLAKE: I'll go and get kitted up.
ZEN: Data amendment. Retrieval systems have located further information. There has been one exploratory expedition put down on Aristo. Neither of the two members ever returned. Their disappearance remains unexplained. Amendment ends.
BLAKE: I wonder what happened to them?

[Liberator in orbit around Aristo]

[Ensor's laboratory]

(Ensor is asleep on his reclining chair)
ORAC: An unidentified space vehicle is manoeuvring to take a fixed orbit which threatens our security zone. What action do you wish taken? ...In the absence of further instructions I shall institute full security procedure.
(there is a spherical surveillance drone on the bench beside the meter)

[Flight deck]

ZEN: Transit complete. Liberator is in stationary orbit within teleport range of the planet Aristo. All circuits are... All circuits are... All circuits are... All circuits are...
JENNA: Zen!
ZEN: (Zen's voice is slowing and fading out) All circuits are... All circuits are... All circuits are...
JENNA: (into communicator) Blake, quickly!
(Blake and Cally run in. Blake tries some controls)
JENNA: I've done all that.
(The lighting dims to a purple hue)
ORAC: (via Zen) You will identify yourselves and state clearly the purpose of your intrusion.
BLAKE: Specify recognition code.
ORAC: I repeat, identify yourselves and state the purpose of your mission.
BLAKE: This is the spacecraft Liberator. We have medical supplies for someone on this planet.
ORAC: You will explain the circumstances governing your previous statement.
BLAKE: We went to the aid of a crashed spaceship. Before he died the pilot asked me to deliver some micro power cells. He said they were vital to save his father's life.
ORAC: Your explanation is satisfactory. I am aware that you have teleport facilities. I will set co-ordinates for a surface landing. On arrival you will await further instructions. That is all.
BLAKE: That is all! Jenna, institute a thorough check of the circuits.
ZEN: All circuits are now free of interference and full function is restored.
CALLY: What happened?
ZEN: Preliminary research indicates that all computer functions were temporarily under external control.
JENNA: But that's impossible!
ZEN: Logic units concur that it is impossible.
BLAKE: But it happened anyway.
ZEN: Logic units concur that it happened. Investigation of this paradox is continuing.
JENNA: I don't like it. A force that can take over the computers could easily take over the ship.
BLAKE: We're not going to find out about it standing here. Are you ready, Cally?
CALLY: Yes, I'm ready.
BLAKE: (into communicator) Avon, can you handle the teleport?
AVON: (on communicator) What's going on?
BLAKE: Just get down there. ...Jenna, switch to automatics, then go and rest in your cabin. Come on, Cally.

[Teleport room]

AVON: Blake!
BLAKE: What is it?
AVON: Look at the locator.
BLAKE: It's setting the co-ordinates.
AVON: By itself. It looks as if our computers are being over-ridden again, being programmed from another source.
CALLY: Perhaps we should move out while we've still got a chance.
AVON: While some of us have still got a chance.
CALLY: Oh, I forgot. I'm sorry, Avon.
BLAKE: Frankly, I doubt whether we could even if we wanted to. From what we've seen already it's obvious that machine could totally immobilise us.
AVON: Then let's get on with it.
BLAKE: If you feel well enough, could you try and stay by the teleport?
AVON: I have no plans to go anywhere else.
BLAKE: All right, put us down.

[Aristo beach]

BLAKE: Some sort of obelisk, I suppose.
CALLY: Well, what should we do now?
BLAKE: Wait for further instructions, there's not much else we can do. Let's take a look around.
(there is a zapping sound)
CALLY [OC]: Blake!
BLAKE: What is it?
CALLY: Look.
(Cally puts her hand out, triggers a vertical green glow and causes the zapping sound. Blake tries it a couple of times)
BLAKE: It's a force barrier. The question is are we on the outside unable to get in or...
CALLY: ...on the inside unable to get out.
BLAKE: Yeah.

[Tunnel]

(there is a hissing sound)
SERVALAN: Travis.
TRAVIS: Er?
SERVALAN: Listen.
(there is the hissing sound again)
SERVALAN: What is it?
TRAVIS: I dunno, but it's been behind us since we started.
SERVALAN: Let's keep going.
TRAVIS: Look, the tunnel's blocked.
SERVALAN: Well, can we get through?
TRAVIS: I'll go and check.
(the hissing sound gets louder. While he is inspecting the rock fall there is a loud roaring sound behind Servalan. Travis returns)
TRAVIS: The roof looks as though it may cave in at any moment.
SERVALAN: Well, we knew there would be risks.
TRAVIS: Well, let's hope they're justified.
SERVALAN: They are. When we deliver Orac to the Federation they will be very grateful, and very generous, and it will be our success, ours alone.
TRAVIS: Keep watch, I'm going through.
SERVALAN: Right.
(Travis goes forward and climbs over the rock fall. The roars suddenly get louder)
SERVALAN: Travis! ...Travis!!
(she is grabbed on the leg by a clawed arm)
SERVALAN: Ahrgh!! Travis! Travis, help me!
(Travis shoots the Phibian with his laseron destroyer from a distance and runs to her)
TRAVIS: Are you hurt?
SERVALAN: No. ...What is it?
TRAVIS: I dunno ...some kind of lizard. We can get through. You have to crawl, but it widens out again later. ...The rewards and credit, remember? ...I'll go first, shall I?
SERVALAN: No, Travis. You will follow me.

[Aristo beach]

(there is a flash of lightning, a clap of thunder and the sea is getting rougher)

[Tunnel]

(Servalan has climbed down from the rock fall and while she is waiting for Travis she spots two skeletons)

[Aristo beach]

(the surveillance drone flies past Blake and Cally who are sitting down against the obelisk. A voice comes from the drone)
ORAC: You will stand up. You will stand up! You are carrying weapons, you will remove them.
BLAKE: We'd prefer to keep them with us.
ORAC: You will remove them.
BLAKE: No!
(there is a laser blast on the ground in front of them)
BLAKE: We will remove them.
ORAC: You will make greater speed. Hurry! Hurry!
CALLY: How do we get through the barrier?
ORAC: You will follow me.
CALLY: Versatile, isn't it?
BLAKE: Let's hope it's still around when we want to get out of here.
(Blake raises his bracelet)
ORAC: It is too late to contact your ship. You are now inside the barrier. Signal transmission through the energy screen is not possible. You will follow me.

[Liberator in orbit]

[Teleport room]

AVON: You were told to stay in your cabin.
JENNA: Any word?
AVON: Nothing since they called in to say that they were down safely and waiting.
JENNA: How long ago was that?
AVON: A little over two hours.
JENNA: We should have heard by now.
(they hear a groaning. Avon pushes the teleport bracelet table aside and finds Gan slumped on the floor)
AVON: Not you as well. What are you doing down there?
GAN: I don't like being on my own. Especially if I'm about to die.
JENNA: That's cheerful.
GAN: Sorry.
AVON: Is Vila on his way as well?
GAN: No. He's doing his best to convince himself that he feels fine. Says we'll just remind him that he doesn't.
AVON: Sometimes he shows distinct signs of intelligence. Why don't you return to your quarters. I'll let you know the moment I hear anything.
JENNA: I'll stay. I think it's better if there are two of us standing by.
GAN: Better still if there are three of us.
AVON: Better still if you...

[Aristo beach]

(as Blake and Cally follow the drone they hear a sound. A black cylinder is rising from the ground)
ORAC: You will make haste and approach the transporter.
BLAKE: Transporter!?
ORAC: Move forward. ...You will now enter the transporter.
(Blake walks round the cylinder)
BLAKE: There's no door.
ORAC: You will enter the transporter.
BLAKE: Look, I'm getting fed up with taking orders. How are we supposed to get inside this thing?
ORAC: The girl will go first. Move to the other side of the transporter.
(Cally goes round, there are two sliding sounds and, when Blake investigates, Cally has disappeared. There is the sliding sound again and a door opens in the cylinder. Cally is inside)
BLAKE: I thought you started without me.
(Blake steps in)

[Transporter]

CALLY: So did I.
(the door closes)
CALLY: I said that thing was versatile.
BLAKE: Maybe we should try and capture it. Perhaps Avon would like it as a pet.

[Aristo beach]

(the black cylinder goes back into the ground)

[Transporter]

(the transporter begins to descend then stops)
BLAKE: We seem to have arrived.
(the door opens and they go out into a corridor)

[Corridor]

(they move along, pause at a square hatch in the corridor wall, and arrive at a junction)
CALLY: Shall we split up and search?
BLAKE: No, we'd end up looking for each other as well as Orac and Ensor. Come on.

[Tunnel]

TRAVIS: Let's check the map.
SERVALAN: We're almost there.
(they hear a hissing sound again)

[Tunnel]

(Blake and Cally reach a closed door)
CALLY: It looks similar to the transporter.
(the door opens)
BLAKE: Just as disconcerting.

[Ensor's laboratory]

(they explore the apparently empty laboratory)
CALLY: Blake, look.
(she points to the surveillance drone on the bench)
ENSOR SR.: Ah, at last. The energy cells, have you brought the energy cells?
BLAKE: Yes, yes, yes, we've got them. Now, are you all right?
ENSOR SR.: Well, of course I'm not all right. If I was all right I wouldn't need you. It's certainly taken you long enough to get here. Ah, it's typical of you morons in physical medicine.
CALLY: Oh, look, you don't understand...
ENSOR SR.: Always has to be a mercy dash, doesn't it? Not enough to simply arrive, do your work, and then get out, oh no, no, it has to be a drama.
BLAKE: We got here as quickly as we could.
ENSOR SR.: I don't want to hear your feeble excuses. Now let's get on with it.
(he switches off the birdsong)
ENSOR SR.: I've developed a system of electronic anaesthesia that I shall administer myself. Shan't need your filthy drugs. (he connects the cable to the printed circuit again) Now, you can start carving me up as soon as you like.
CALLY: Look, you must listen to us, we...
ENSOR SR.: Press the red switch, will you. (Blake presses the red button) The red one! (Blake presses the green one) Now you'll have to work quickly. An implant operation can't be done in ten minutes you know. The last time I checked it showed there was very little in reserve.
BLAKE: Professor, what are you doing?
ENSOR SR.: The instrument isn't entirely accurate, but it does give a, an indication. (the meter needle is still registering about the same as before) Well, I suppose you enjoy this sort of thing. Hm? Boosts your egos to have the power of life and death. Adds to the mystique with which you medics like to surround yourself. All right, now, which of you is the surgeon? (he switches the green button) Oh, come on, speak up, which of you is the butcher?
BLAKE: We are not medics, I'm afraid.
ENSOR SR.: What?
CALLY: We went to the aid of a spacecraft that had crashed, one of the crew was already dead and the other man was dying, but before he died he asked us to get these to you.
(Blake hands Ensor the box of power cells)
ENSOR SR.: Both men dead, you say?
CALLY: Yes.
ENSOR SR.: One of them was my son.
CALLY: I'm sorry. He tried desperately to reach you. He did everything he possibly could.
ENSOR SR.: Oh, such a waste. He had a good mind. Death is such a waste. You were with my son when he died?
CALLY: Yes.
ENSOR SR.: It's always too late, isn't it? I wonder if he knew how much I loved him?
BLAKE: I think he did.
ENSOR SR.: Oh I, I'm sorry if I snapped at you. It's... It's just my way. Thank you, for doing all you could to help.
CALLY: We were hoping you might be able to help us.
ENSOR SR.: Mm, what is it you want?
BLAKE: The four of my crew who went down to help your son suffered from high doses of radiation. Now, unless they get decontaminant drugs they also will die.
ENSOR SR.: Ah, couldn't be easier. Whole cabinet of drugs over there, ...round the corner. You'll see it. Take all you want, help yourself. Can't stand them, myself. Filthy things, drugs. Oh!
BLAKE: Listen, how long have you got before these power cells run out?
ENSOR SR.: Thirty minutes, at the very outside a couple of hours.
BLAKE: Well, then there is still a chance. If we can get you back to our ship then we may be able to perform the implant ourselves. I mean, it's a relatively simple operation. ...Our computer can instruct us.
ENSOR SR.: You have the facilities to perform an operation?
BLAKE: Liberator has one of the finest surgical units you've ever seen.
ENSOR SR.: Might be possible, I suppose.
BLAKE: Well, come with us, you've got a chance, stay here you'll die certainly.
ENSOR SR.: I'll do it. I'll do it. Ah! it will be strange to leave this place, you know. I, I haven't been away for over forty years.
(Blake produces a teleport bracelet)
BLAKE: Put this on.
ENSOR SR.: What is it?
BLAKE: Well, if you can, er, get rid of that force barrier then we can teleport you directly from here.
ENSOR SR.: Ah, it's not practical.
BLAKE: Why not?
ENSOR SR.: Oh, if I were to disconnect it now it would be, oh, five hours before it dissipates and I haven't got five hours. No, no, we've got to get to the surface.
CALLY: Blake, I think I've found enough for everybody.
(she gives Blake a black box which opens to inspect the contents)
BLAKE: Oh good, at least the others will be all right.
ENSOR SR.: Well, I'm ready, shall we get started?
BLAKE: Well, wait a minute. There is something else.
ENSOR SR.: What?
BLAKE: What about Orac?
ENSOR SR.: Orac. Of course, yes, I can't leave Orac here.
CALLY: That was the message we were to give you. Your son says 'The Federation is willing to pay a hundred million for Orac'.
ENSOR SR.: Ah, they're willing to pay are they? Well, he's worth ten times that much. Now, come on you, help me, help me, help me. I'm gonna get him out of here. Quick. Quick. Come on.
(Cally and Ensor pull out a dexion trolley with a transparent box on it)
ENSOR SR.: Careful. Careful. Careful. Put him over here, yes. Now, you should be able to carry him between you.
CALLY: This is Orac?
BLAKE: A hundred million for that?
CALLY: Is it a computer?
ENSOR SR.: It most certainly is not. It is a brain, a genius. It has a mind that can draw information from every computer containing one of my cells. Orac has access to the sum total of all the knowledge of all the known worlds.
BLAKE: You mean it can draw information from any other computer without a direct link?
ENSOR SR.: Precisely that, yes. Now are you going to stand there and listen to a lecture or might you consider it more important to try and sustain my life? Now, will you put him in there?
(Blake helped Cally lower Orac into a lidded carrying box that Ensor has produced)
BLAKE: Oh, yes, I'm sorry.
ENSOR SR.: Careful, careful, careful. That's right.
(Blake places the black box containing the drug on top of Orac)
ENSOR SR.: You better take that. Right. Ahrgh, just a minute. You'd better take that.
(Ensor gives Blake a small box with a button on it which he has unplugged from the top of Orac)
BLAKE: What is it?
ENSOR SR.: It's a simple on/off device that activates Orac. Use it and Orac will advise you of every detail of the operation you intend to perform. Now, shall we go? Ah! Just a minute, just a minute. Ah. (he gives the plants a parting shower) Yes, goodbye my plants, goodbye. I shall miss you. The only real vegetation on this whole benighted planet.
BLAKE: Ensor.
ENSOR SR.: Huh? Oh, yes. Ah! I nearly forgot you, my little ones, there you are, (he feeds the fish) Oh ho ho, that will have to do. That will ha...
BLAKE: Ensor!
ENSOR SR.: I shall be back soon. Goodbye, goodbye.

[Tunnel]

(Travis and Servalan have found a square metal hatch in the tunnel wall)
TRAVIS: It's not good, it won't shift. It's solid.
SERVALAN: What are you going to do?
TRAVIS: I'm gonna use a charge. ...Right, let's take cover.

[Corridor]

ENSOR SR.: No. This way, this way.

[Tunnel]

(the charge timer is still running down)

[Corridor]

(the square hatch that Blake paused at blows out into the corridor)
ENSOR SR.: What was that?
BLAKE: Get back to the lab.
(Blake goes off along the corridor)
ENSOR SR.: Ahrgh.
CALLY: Can you help me carry this?
ENSOR SR.: Yes, yes all right. Yes.
CALLY: Come on.

[Tunnel]

TRAVIS: Come on.
(he steps through the hatch followed by Servalan)

[Corridor]

TRAVIS: Blake!
(he fires his laseron destroyer at Blake and misses. Blake runs off round the corner and follows Cally and Ensor back into the laboratory. Travis and Servalan reach the corner)
TRAVIS: Which corridor did they take?

[Ensor's laboratory]

BLAKE: Weapons?
ENSOR SR.: I disapprove of weapons.
BLAKE: So do I, but I disapprove of dying even more.
CALLY: Is there another way out of here?
ENSOR SR.: No, oh, yes, there is, we could go by the tunnels under the old city.
BLAKE: Well, let's go then.
ENSOR SR.: But it isn't safe.
CALLY: But it might be safer than here. Show us.
BLAKE: All right, this way. Oh, it's locked.
BLAKE: Well, get it open.
ENSOR SR.: Key, now where did I put the key?

[Corridor]

(Servalan and Travis reach the laboratory door)
SERVALAN: Blast it open.
TRAVIS: Right, stand back. Keep clear.
(Travis uses his laseron destroyer)

[Ensor's laboratory]

TRAVIS: There, they've gone through another door. He's getting away! He's getting away!
SERVALAN: Travis, forget Blake, find Orac, ...although they've probably taken it with them. ...Travis. ...Look.
TRAVIS: What is it?
(Servalan has found a map of Aristo sub-city)
SERVALAN: Now, this is where we are. In order to get to a surface exit they have to go back along this passage, along here up there and there's your surface exit. Now, if we go back the way we came, along here, we'll get there first and we can be waiting for them. Let's go.

[Tunnel]

BLAKE: How much further?
ENSOR SR.: Oh, some way yet. I... I shall have to rest soon.
CALLY: Well, we should keep on moving, they could be right behind us.
BLAKE: Yes, without weapons we don't stand a chance. Look, you keep going. I'm going to stay here and try and bring the roof down, ...block them off.
CALLY: Perhaps it would be better if we all stayed together?
BLAKE: Let me do it my way, Cally.
ENSOR SR.: Come on.

[Liberator in orbit]

[Teleport room]

(Jenna, Avon and Gan are all comatose. Avon comes to and checks his watch)
AVON: (into communicator) Vila.

[Rest and recreation room]

VILA: (into communicator) What is it?
AVON: (On communicator) How do you feel.
VILA: You woke me up to ask me how I feel?
AVON: Can you walk?
VILA: Why should I want to?
AVON: Meet me in the teleport area in your surface clothes, and hurry.
(Vila opens the door to leave and hits his head with it)
VILA: Oh!

[Teleport room]

(Avon throws his gun on the console waking Jenna)
JENNA: What is it, what's the matter?
AVON: Cally and Blake ...They've been down on the surface for far too long. They must have run into some kind of trouble. See if you can wake Gan up.
JENNA: Gan, Gan, come on, wake up.
GAN: What, er, what's wrong, Jenna?
JENNA: Blake and Cally, something's happened to them.
VILA: Where is he?
JENNA: We don't know.
VILA: He woke me up.
GAN: Blake woke you up?
VILA: Avon.
AVON: Vila.
VILA: What are you up to now?
AVON: You and I are going down to the surface. Put that on.
VILA: Are you out of your mind. I'm finding it hard enough just to stay on my feet.
AVON: Then crawl, but put that on!
(Avon thrusts a gun into Vila's arms. Vila is holding his surface boots)
AVON: Gan, you stay here with Jenna. Make sure that one of you stays conscious long enough to beam us back up again.
GAN: Right.
JENNA: Listen, Avon, there's nothing you can achieve by going down there.
AVON: I don't intend to sit around and wait to die. Get ready to put us down.
(he gives Vila some pills)
AVON: Take these.
(Vila has put his left boot on)
VILA: What are they?
AVON: They will help, for a while anyway.
(he throws the box with the rest of the pills to Jenna)
JENNA: Ready?
AVON: Get on with it.

[Aristo beach]

(Vila's bootless right foot is in a puddle)
VILA: Oh! I've got a wet foot now.
AVON: Come on.

[Tunnel]

ENSOR SR.: Wait, wait. Wait a minute. I have to rest.
(there is a loud roar)
CALLY: What is that?
ENSOR SR.: Er, there are some creatures that live down here.
CALLY: Are they dangerous?
ENSOR SR.: Oh, I don't think they'll harm us.
(elsewhere Blake still trying to bring down the tunnel roof)
CALLY: Will you be all right for a minute? ...I'll be back.
(Blake is still working on the tunnel roof. Cally is attacked by a Phibian)
CALLY: Ahrgh...
(Blake runs to where Cally is and hits the Phibian over the head with a rock)
BLAKE: Cally, check the way ahead's clear.
CALLY: Blake! Look!
(there is a flight of stairs with a shaft of light coming down them)
BLAKE: Ensor!
(Blake turns back to where Ensor is slumped)
BLAKE: Ensor.
(he finds he has died)
CALLY: I am sorry. Just a little longer and we might have saved you.
BLAKE: Come on.

[Aristo beach]

(Blake and Cally emerge from the tunnel the same way Servalan and Travis entered it. Blake closes the trap door and puts a rock on it)
BLAKE: (to Cally) Call Liberator.
(an explosion on the ground stops her. Travis and Servalan have appeared and Travis has his laseron destroyer pointed at Blake)
TRAVIS: Goodbye, Blake.
SERVALAN: Wait.
TRAVIS: I have waited, ...too long.
SERVALAN: He's the bonus, Travis. Orac is the prize. (to Blake) Where is Ensor?
BLAKE: Ensor, like his son, is dead.
SERVALAN: It was to be expected. He survived longer than we thought was possible. That box, ...Orac, ...that's what we came for. If it does only half of what was promised it'll give the Federation greater power than it's ever known.
CALLY: What are you going to do?
TRAVIS: What do you think I'm going to do?
BLAKE: I think you're going to kill me, Travis, with or without orders from the Supreme Commander.
SERVALAN: With orders, Blake. All right, Travis, go ahead.
(Travis' left arm is hit by a shot)
TRAVIS: Ah! Ah!
AVON: Don't move.
BLAKE: Good shot, Avon.
AVON: I was aiming for his head.
VILA: You took your time, what have you been up to?
CALLY: We had a few minor problems.
VILA: Did you bring the decontaminants?
CALLY: Yes, we've got them.
BLAKE: Tell them to bring us up.
VILA: (into communicator) Jenna, stand by.
TRAVIS: Well what are you waiting for? Come on, man. Why don't you kill us?
(Blake puts his hand on Avon's arm. He is pointing a gun at Travis)
BLAKE: No, I've got a better idea. We'll get a message through to the Federation, tell them that you let us take Orac. I'm sure they'll be quite fascinated by your explanation.
SERVALAN: You're in a lot of trouble, Travis.
(Travis' laseron destroyer is looking a little the worse for wear too)

[Liberator in flight]

[Flight deck]

BLAKE: The other end's connected.
AVON: You want to give it a try?
BLAKE: Why not? Vila, switch to automatics.
(the others are sat round Orac. Blake and Avon join them)
BLAKE: Oh, 'Activator'.
(he hands the small box with the button it to Avon who plugs it into Orac. Orac lights up and begins to hum)
JENNA: Well, for a hundred million credits you'd expect something a little more spectacular than that.
VILA: Try kicking it.
GAN: Are you sure it's fully switched on?
ORAC: Of course I'm properly switched on. Having depressed the activator button what else would you expect?
CALLY: It's his voice.
BLAKE: It's exactly as though Ensor were speaking.
ORAC: Surely it is obvious even to the meanest intelligence that during my development I would naturally become endowed with aspects of my creator's personality.
AVON: The more endearing aspects by the sound of it.
ORAC: Possibly. However similarities between myself and Ensor are entirely superficial. My mental capacity is infinitely greater.
JENNA: Modest, isn't he?
ORAC: Modesty would be dishonesty.
VILA: What's wrong with being dishonest?
ORAC: Is that a question?
VILA: Yes.
ORAC: The question is futile. Were I to say that I'm incapable of dishonesty how would you know if I was being dishonest or not?
BLAKE: A question for a question. Well, you're capable of evasion, anyway.
VILA: I think I've heard enough. I don't like him. Orac, be a good junk heap. ...Shut up.
CALLY: I agree with Vila.
ORAC: Define the words 'Shut up'.
BLAKE: Stop talking. Do not speak. Be silent.
ORAC: That is better. Our relationship will be best served if your statements are free of ambiguity.
GAN: Let's switch him off and go back to work.
BLAKE: No, wait a minute, let's find out what he is capable of. Orac, what are your limits?
ORAC: They have not yet been defined. My knowledge is virtually infinite. My secondary ability is to logically process that knowledge and make accurate predictions.
CALLY: Are you saying you can see into the future?
ORAC: The words 'future', 'present', 'past' are meaningless.
AVON: Define 'meaningless'.
ORAC: I have the capacity to predict events that have not yet taken place.
AVON: That is not what I asked.
ORAC: In the circumstances the question is meaningless.
(Avon laughs)
BLAKE: Now, that's ridiculous. Give us a demonstration.
ORAC: Demonstrate as a command is insufficient.
GAN: What does he mean?
AVON: He means, like Zen, that he requires specific instructions.
ORAC: Instructions are not needed if commands are succinct.
VILA: I'm getting tired of this. Go on, predict something.
ORAC: I will project an image on your scanner screen.
JENNA: Go on then, show us.
GAN: Hey that's us.
VILA: It's Liberator.
BLAKE: It's not much of a prediction, just travelling through space.
ORAC: It is not a prediction, it is an immutable certainty. Space vehicle will be destroyed.
JENNA: What!
VILA: You're not given to practical jokes are you, because that's not funny.
BLAKE: When's this supposed to happen?
ORAC: The event is not far distant.
BLAKE: How far distant?
GAN: There must be some way of making him tell us when.
AVON: Be more precise.
ORAC: The event is now even less distant.
VILA: I don't believe it.
JENNA: Zen, system status.
ZEN: All systems are functioning normally.
VILA: Yes, but Zen's only a machine.
AVON: So is Orac.
(Avon unplugs the activator and tosses it away)
VILA: That's all right, that's fixed Orac.
BLAKE: No, it hasn't.
JENNA: What do you mean?
BLAKE: We've forgotten something. The prediction has still been made.
JENNA: Blake!
(on the viewscreen Liberator is seen to explode)

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