Fury from the Deep ( TV story ) Fury from the Deep was the sixth story of season 5 of " Doctor Who " . It was the final serial in which Victoria Waterfield appeared as a regular member of the cast . It concluded her overarching story arc by ostensibly giving her foster parents to replace the father she had lost in her introductory story , " The Evil of the Daleks " . It also saw the first appearance of the sonic screwdriver . Apart from several short clips , all six episodes are absent from the BBC Archives . Synopsis . The TARDIS lands on the surface of the sea , just off the east coast of England . The time travellers use a rubber dinghy to get ashore , where they are shot with tranquilliser darts and taken prisoner by security guards as they have arrived in the restricted area of a gas refinery . At the refinery base , run by a man named Robson , the Second Doctor learns that there have been a number of unexplained problems with the pressure in the feed pipes from the offshore drilling rigs . It is later revealed that one of the rigs has sucked up a parasitic form of seaweed , which is capable of releasing poisonous gas or a strange kind of foam that allows it to take control of the minds of those it touches . The weed spreads rapidly and seems set on establishing a huge colony centred around the rigs . The Doctor makes the chance discovery that it is very susceptible to high pitched noise ; consequently , he is able to use the amplified sound of Victoria ' s screams to destroy it . Victoria elects to stay with the family of one of the refinery workers , Harris . The Doctor , although sharing Jamie ' s sadness at her departure , understands her decision to settle down to a quieter life . Plot . Episode 1 . Above an expanse of open sea not far from the coast , the TARDIS materialises in mid air , slowly descending over the waves , before setting down gently on the surface of the water . Moments later , the Doctor and his young companions Jamie and Victoria scramble out onto a rubber dinghy and row towards the shore . Once there , the Doctor helps Victoria out of the dinghy onto the shingle beach . The Doctor says they must be in England — Jamie agrees , citing the weather as proof , and suspects that the TARDIS must be broken as it keeps returning them to Earth . The Doctor sees something in the distance and starts to walk off . Something further along the beach has caught the Doctor ' s attention . Jamie and Victoria follow him . Jamie notices a preponderance of foam lying around on the beach . He points this out to the Doctor . The Doctor scoops up a handful of foam . Playfully he shoves the foam into his companion ' s face . Soon enough all three are engaged in a high speed battle with foam flying in all directions as they run up and down the sand . Catching sight of something ahead , Jamie stops and points down the beach . He thinks it is the source of the foam and decides to investigate . Shaking off the foam , the three travellers make their way along the shore . At last they reach a long steel pipe that curves up out of the sand and into the face of the cliff . It bears the legend Euro Sea Gas . The Doctor peers closely at a large black metal box that is fixed securely to the pipe . Tracing his fingers around the edges , he tries to find a way to open the box — to no avail . The Doctor produces a wand - like device he calls a sonic screwdriver and , seemingly of their own accord , the screws securing the lid of the box rotate cleanly out of their threads . The Doctor investigates the inside of the box but is interrupted by a low rumbling . The Doctor replaces the lid , then , rummaging in his pocket , he pulls out a stethoscope and listens intently to the pipe . His brow furrows at the sound of a distant , faint , pumping heartbeat . Jamie and Victoria crowd closer to the Doctor . Victoria feels uneasy and feels they are being watched . The Doctor relents and moves on . Unbeknownst to the Doctor and his colleagues , they are being watched . A small monitor screen displays an image relayed from the telescopic sight of a high powered remote controlled camera positioned high on the cliff . The image moves and the cross hair target settles on the Doctor . A shot catches the Doctor in the shoulder , and he crumples to the sand . Victoria and Jamie rush to the Doctor ' s side . The weapon re - sights and then fires twice in quick succession . Some time later Victoria opens her eyes . She finds herself lying on the floor of a brightly lit room with two armed guards standing over her . When she tries to sit up she finds her limbs heavy and unresponsive . A low groan at her side tells her she ' s not alone . She wakes the Doctor and Jamie . The Doctor tries to get a response from the guards but to no avail . A scientist by the name of Robson enters and demands answers . The Doctor points out it is hard to answer questions when drugged . Robson administers the antidote . Robson suspects that the Doctor and his colleagues are saboteurs trying to interfere with the pipe network . Another scientist , by the name of Harris , tries to reason with him , but he orders Harris to lock them up . Harris explains that Robson has been under considerable stress recently as they have lost contact with one of their rigs — there has been no answer from the crew despite the video link functioning fine . Apologetically Harris says he now has to lock them up . Harris leads the way . Encouraged by two armed guards , the travellers follow him . Behind them on a control panel a warning light starts to glow . Elsewhere in the complex Harris ' wife Maggie finds her route barred when she tries to leave the refinery compound . A guard demands to see her pass ; when she can ' t show it , the guard tells her she should go back to the living quarters . The Doctor and his companions are escorted to a tiny bunk room whilst the Doctor is still trying to persuade Harris to let them go . Harris wants to know what the Doctor was doing interfering with the pipe . The Doctor explains about the noise he heard . Harris states that it can ' t be marine life as they have eradicated the possibility of that . The Doctor suggests they shut off the gas and inspect the pipe . Harris says Robson would never agree to that . He is also intrigued by how much the Doctor seems to know about their operation . In the control hall , technician Price calls Robson to the communication station . Price has regained contact with Rig B . On an awful line the leader of Rig B states , monotonously , that " everything is under control " and not to worry . He states the emergency crew sent by Robson needs to stay here as they have two men out of action . The communication breaks . Robson orders it to be sorted and turns away in disgust as Harris enters . Harris tells Robson the Doctor ' s theory and says they should turn off the gas and check . The conversation is interrupted by an engineer telling Robson that the pressure is dropping . Harris states this has been happening on and off for the last three weeks and states that this is proof of the Doctor ' s theory . As they argue , a briefcase lies open on the desk to one side . A white gloved hand removes some papers from the case . Robson , whilst still being confrontational , says he will look at Harris ' findings but only to prove him wrong . Harris goes to get the file only to discover it is gone . Harris goes home to see if he ' s left it there . In the bunk room , Jamie is standing on the Doctor ' s shoulders . He passes down a grille he has removed from an opening above the door . Jamie is going to try to pick the lock , but suddenly he slips . Victoria continues to work on the lock as Jamie sticks his head out into the corridor . He overhears a conversation between Harris and Maggie . Harris asks Maggie to get the report from their study and bring it to the control room . Bemused , Maggie watches her husband leave and then heads back to their living quarters . Unaware that Jamie has narrowly avoided being spotted , Victoria assumes the worst and thinks he ' s stuck . The Doctor gives Jamie a huge shove and he tumbles head first into the corridor outside . Momentarily stunned , Jamie staggers to his feet ; behind him the door swings open as Victoria has picked the lock after all . Maggie Harris returns to her apartment in the married quarters . Going through to the study , she searches for her husband ' s missing file . Eventually she finds it , although not in the drawer her husband had indicated . Picking it up , she ' s puzzled to see that something is tucked inside . Maggie flips open the file and then drops it with a start as she is suddenly stunned . It contains seaweed , which has stung her . Shocked , Maggie retrieves the file and the clump of seaweed from the floor . Crossing the room , she slides open the garden door and tosses the seaweed out onto the patio . Unseen the seaweed begins to bubble and writhe . Van Lutyens , a member of the Dutch government , comes to Robson with his concerns regarding Rig B . Van Lutyens berates Robson for not informing the other rigs as it is affecting morale . Robson puts Van Lutyens in his place and strides away . From a walkway overlooking the control hall , the Doctor and his companions observe Van Lutyens storm off . Gesturing Jamie to keep quiet , the Doctor listens as Price answers an incoming call . It is Chief Baxter from the Control Rig . He informs Robson he thinks something has got into the pipes and is producing a regular , pulsating thumping noise " like a heartbeat " . Hearing this , the Doctor and Jamie intend to go and investigate , sending Victoria back to the bunk room . Victoria reluctantly makes her way back to the bunk room but , as soon as the Doctor and Jamie are out of sight , she sets off in the opposite direction to do some exploring of her own . In her apartment , Maggie is beginning to suffer ill effects from the seaweed sting . Feeling faint , she moves to the video phone and asks to contact her husband . In the control hall Robson is advising the engineering checks when Harris asks Robson for permission to see his wife . Robson is reluctant but eventually relents . Not far away , in a store room containing oxygen cylinders , someone wearing white gloves and a gas mask is tampering with the valves , allowing the contents to leak away . The saboteur stops in alarm when he hears someone outside . Victoria is making her way cautiously along the corridor when she hears someone approaching . Panicking , she tries the nearest door and ducks inside . Inside the store room , the oxygen - rich atmosphere is stifling . Victoria moves further into the room , shutting off the open valve . A small sound behind her causes her to spin round in alarm . Someone is in the room with her . A tall thin gas - masked figure dashes past her and makes his escape . The door closes , and Victoria hears the sound of a key turning in the lock . Dashing to the door , she tries the handle . Resigned to her fate , Victoria sets to work on the lock . Out in the corridor , the saboteur activates the emergency ventilator control and then slips away . An electronic hum rises in the oxygen store , and Victoria is alarmed to see a metal grille in the wall swing open . Meanwhile , the Doctor and Jamie creep past the control hall and into the room next door . The room is dominated by a large cylindrical machine , near to which an air lock leads to a loft platform above a shaft disappearing deep below the complex . Jamie eyes the machine with suspicion . The Doctor explains this is the main workings for the impeller , which pumps gas from out at sea . The Doctor leads Jamie through a door into the next room , a vast space housing a complex arrangement of pipes and pressure gauges . There is a raised observation platform at one end of the room . There is a small transparent section of the pipe for checking condensation . . . and anything else that might get inside . Victoria has had no luck with her hair pin and remains locked in the oxygen store . She begins to knock on the door , looking for help . Victoria suddenly becomes aware of a strange bubbling , popping noise coming from the far side of the room . As she turns , a mass of foam surges from the ventilator grille . Terrified , she backs away as she catches sight of something moving in the foam . Back in the pipeline room , the Doctor has his stethoscope pressed to the main gas pipe . He can hear the same noise again . As they investigate , they hear the cry of Victoria through the pipe . The Doctor and Jamie dash out into the corridor . Victoria ' s screams can be heard all over the refinery compound , echoing around pipelines and along metal corridors , making it difficult to pinpoint her location . Increasingly frantic , Victoria presses back against the door as the seething foam continues to pour through the grille . Tendrils of seaweed begin to slide through the vents , writhing and twisting and coming closer . Slowly the tendrils reach out to grab Victoria . . . Episode 2 . The Doctor and Jamie find the oxygen store . They unlock the door and rush in . The foam is still pouring in from the ventilator shaft . They release Victoria . As she tells her horrifying tale , the Chief Engineer discovers the cylinders empty . Robson accuses the girl , but others point out the door was locked from the outside . The refinery crew note the presence of some kind of toxic gas in the room . Harris has found Maggie at home , dazed . She can only barely remember being stung by the seaweed . Harris helps Maggie to lie down but suddenly , she sits up and looks in terror towards the window . They are unaware that the foam is bubbling and multiplying outside on the patio . Harris leaves to get help , even if it ' s from this mysterious Doctor . Suddenly , Maggie gets up and heads for the door that leads to the patio . She takes hold of the door handle , trying to decide whether or not to open it . With a swift movement , she swings open the door to see the foam bubbling away . She screams and swings the door shut . Robson is told that the pump is slowing down , and the Doctor informs him of the movement he heard in the pipes . Van Lutyens says that this is the exact same sound heard on the rigs . Robson is convinced the movement heard is simply a mechanical fault . He absolutely refuses to stop the gas flow , even as the pressure continues to drop . Meanwhile Jamie and Victoria are being told how the gas system works . They learn that the gas harvested here provides the energy for the whole of the South of England and Wales . There are seven minor rigs that feed the gas to a central rig that pumps the gas to the refinery . Their conversation is interrupted by Harris looking for the Doctor . Harris begs the Doctor to come and help his wife , but Robson curtly refuses to let him go . He eventually relents , seeing the look on Harris ' s face , and allows him an hour before he needs to return back . Maggie , having recovered slightly , answers the doorbell to find Mr Oak and Mr Quill at the door . They are maintenance men who request access to her kitchen for an inspection . She tries to get rid of them but , when told it is on orders from Robson , reluctantly lets them in . Van Lutyens and the Chief Engineer decide there must be something wrong with the impeller itself ; pressure is either dangerously high or far too low . Van Lutyens fears an imminent explosion in one of the pipes . Van Lutyens implores Robson to turn the gas off , but Robson refuses , saying he will simply burn off the pressure . At the Harrises ' living quarters , Maggie ' s hands are over her face , shielding out the light . She goes to the dressing table and looks at her reflection in the mirror . In the kitchen , Oak and Quill continue their mock inspection of the gas oven . Oak notices that a seaweed - like growth is forming on the back of his hands . He smiles and covers his hands with a pair of white gloves , similar to those worn by Quill . They hear the thumping pulse and make their way to the patio . Quill opens the patio door and sees the foaming mass . Foam starts pouring into the study . Oak and Quill make their way to Maggie . Much to her terror , they loom over her and open their mouths , releasing a hissing noise . Maggie ' s screams of terror become coughs and gasps for air as she falls to the ground . Robson impresses the crew by engineering the release of gas pressure , but the feed out to receiving stations is still dropping and the impeller still slowing down . Price reports that contact with Rig C has been lost . Harris brings the Doctor and friends to his home , but they discover Maggie unconscious , the house full of gas . Jamie picks up a chair and breaks a window . Van Lutyens again tries to reason with Robson , but Robson is full of contempt for him , Harris , and all the others trying to tell him his job . As they argue , the impeller grinds to a halt . The entire refinery is flooded with the heartbeat sound that has been masked by the sound of the machinery . The Doctor states that Maggie is in a coma brought about by inhaling the toxic gas . He goes on to say that it is non - natural gas , unlike what the refinery deals in , and that it is the same gas that Victoria experienced in the oxygen chamber . Harris tells the Doctor about the seaweed . Victoria finds a sample of the seaweed in the room . The Doctor speculates that the seaweed must have been planted to sting Harris . Victoria notices that the seaweed is moving . Van Lutyens tries to raise dissent amongst the staff by trying to sway the Chief Engineer ' s opinion of Robson , but the Chief Engineer remains steadfast . Van Lutyens believes he knows where the blockage is likely to be and spreads out plans of the pipeline on a desk to prove the exact spot . He manages to convince the Chief Engineer to ask Robson . This is met by opposition again , and Robson tries to kick Van Lutyens out of the refinery . Van Lutyens is insistent , hearing the heartbeat and sensing a creature ' s presence , " in the darkness , waiting . " Episode 3 . In the Harris ' quarters , the Doctor and his colleagues inspect the seaweed . The Doctor fishes in his pocket and pulls out a small polythene bag . He hands the bag to Jamie . The Doctor scoops up the seaweed on the end of a pencil . He carefully carries it toward the bag and drops it inside . Harris asks after Maggie . The Doctor suggests that he should seek medical help . Harris leaves to do so . Jamie realises that they are no longer under supervision , which prompts the Doctor and his colleagues to slip away to the TARDIS to carry out some experiments on the seaweed . Robson seems somewhat shaken by the heartbeat . Van Lutyens tries to force his point again , but Robson still insists he will not stop the gas . Back at the TARDIS , the Doctor places the seaweed specimen in a glass tank to test natural gasses on the weed . Through a test run by Victoria , the Doctor has discovered that the weed is giving off a toxic gas . As Jamie idly looks through a microscope , he asks the Doctor what the " wriggly things " he can see are . The Doctor is delighted and presses a button , and the slide is shown on the monitor . Victoria explains to Jamie that this means that the seaweed is " just as alive as you and me . " Van Lutyens tries to reason with Harris , but he is focused on his wife . Harris asks Price to contact the main rig for medical help . Robson asks Harris where the Doctor and his colleagues are and is furious when he discovers that he has let them go . Harris explains about his wife . Van Lutyens is curious but Robson suspects that all of this is because of the Doctor . The Chief Engineer says he is ready to start the impeller . He does so and it works . . . for thirty seconds . He speculates it must be jammed at the base . Robson loses his mind and storms out . Van Lutyens tells Harris that Robson is cracking up and that Harris should take control of the base . Harris is unsure but asks the Chief Engineer . The three of them decide they will all go and reason with Robson together . The Doctor has consulted a book of legends and superstitions and finds a page with a creature on it that Victoria identifies as the one she saw in the oxygen chamber . As they talk they begin to smell gas . As Jamie sneezes , the Doctor sees that a tendril from the creature is over - hanging the tank . Victoria screams at seeing the tendril and , as she does so , the creature returns into the tank . The Doctor realises that this weed must be inside the pipeline and corrupting the gas . He rushes off to the repository . Robson refuses to yield from his point of view and loses his temper before storming out . Van Lutyens says this further proves his point before going to ring his superiors . Robson returns to his quarters , takes off his tie and lies in his bunk . Outside in the corridor , a man approaches , holding a key . He closes in on Robson ' s door lock with the key in his hand . Robson hears and orders whoever it is to leave him alone . Oak listens at the door . He turns the key and locks the door . He moves to the emergency vent control and activates it . Gas starts flooding into Robson ' s quarters . As Harris arrives , Robson frantically tears the door open and runs off . Harris looks inside the room and sees a creature moving in the vent . Victoria uses her hairpin to open the door to the Harris ' living quarters . Jamie immediately notices the smell of gas and goes to check the kitchen . The Doctor and Victoria open a door and find the bedroom covered in foam . Tendrils reach out through the foam . The Doctor closes the door , assuming that Maggie must have been taken to the medical quarters . Jamie is in the kitchen on top of a table surrounded by a sea of foam . He cries for help . The Doctor and Victoria rush up a spiral staircase to a skylight above Jamie . The foam continues to flood through the Harris ' quarters , continually drawing in on Jamie . The Doctor forces open the skylight and reaches down to Jamie . The Doctor and Victoria pull Jamie through the skylight to safety . Harris has fetched Van Lutyens , only to find the creature gone . Van Lutyens is initially dubious but is soon convinced . They exit Robson ' s quarters . Van Lutyens warns that there are vents like Robson ' s all over the repository so they had best not be opened . He also urges Harris to take control now that Robson ' s AWOL . Harris puts out a message for Robson to be found and says he will take leadership until he is found . Harris then contacts his superiors in London . Making their way back to the repository , Victoria moans that she had no idea that life would be so fraught with danger travelling with the Doctor . Harris informs Van Lutyens that members of the board are coming down to inspect the repository . They discuss the creature , stating they wish they knew what it was . The Doctor interrupts and says he knows what it is . He explains his findings regarding the seaweed , the fact it releases toxic gas and the fact it is parasitic . Oak and Quill , who have been present for all of this , silently slip away . Harris , worried about the parasitic qualities of the creature , asks Price to phone medical quarters for an update on his wife before informing the Doctor about Robson ' s disappearance . Harris is informed that the medics have yet to collect Maggie . The Doctor is horrified and tells Harris about the state of his home . Harris rushes off . Van Lutyens is left to discuss the Doctor ' s theories . Outside on the beach Robson and Maggie meet . Maggie explains there is little time and that Robson knows what to do . Robson watches as Maggie walks out into the sea until she is longer visible under the waves . . . Episode 4 . Price is unable to raise communications with a third rig at sea . The Doctor implores Van Lutyens to do something but he has no authority and needs to wait for Harris to return . Overseen by the Chief Engineer , the technicians are nearly falling asleep from exhaustion and boredom . Everyone in the room is suddenly alert as the pulsating starts up again . As Jamie and Victoria rest , Jamie is confident the Doctor will see them through this , enjoying their travels in the TARDIS . Victoria is less confident . She feels unsafe . She ponders all the facts they ' ve learned and frightens herself . The Doctor arrives and tells her the latest news . Victoria is frustrated that they must wait , possibly to be attacked again by the weed . She longs to be someplace pleasant and peaceful . Harris discovers Robson on the beach . He questions him about Maggie , and Robson says he will find her , very soon , then walks away . Van Lutyens is planning to investigate the base of the impeller shaft to see what really is going on down there ; neither the engineer nor the Doctor can dissuade him . Van Lutyens is steadfast and is soon lowered down . He cautiously investigates , opening a hatch and peering into the chamber below . He realises the entire chamber is a mass of foam and weed . The weed creature attacks and pulls him down into the chamber . As he descends into the foam , he lets out a blood curdling scream . Hearing the scream , the Chief Engineer raises the lift to find no Van Lutyens . The Doctor and , more reluctantly , Jamie go down after him . Harris , exhausted and scared for his wife , is told that there has been no sightings of Maggie and is also informed that Megan Jones , chief executive of the board , has arrived at the refinery . He seeks out Van Lutyens and is shocked to hear of his , the Doctor and Jamie ' s mission into the pipeline . He orders them to be returned but Oak and Quill , who are in charge of the lift , say it is too late . Jamie and the Doctor find Van Lutyens ' torch . Jamie picks up the torch , but it does not work . Jamie has the spooks and wants to leave . Megan Jones and her assistant , Perkins , arrive . Yet again , Victoria is concerned for the welfare of the Doctor and Jamie . Price informs Harris of the arrival of Jones . He and the Chief Engineer go to meet her and inform her of the situation . Harris leaves Oak and Quill in charge in the Impeller Room , with Victoria worriedly waiting and listening . Jones is dismissive of the idea of a seaweed creature , but Harris says he ' s seen them . She tries to pass it off as stress due to concern regarding his wife , but the news about the lack of communication with the rigs worries her more . She allows the use of the company helicopter to inspect the rigs . Jones wants to see Robson , but Harris says she can ' t . He struggles to explain the changes that Harris has gone through . Down in the pipeline the Doctor and Jamie encounter the foam . Jones is still sceptical and wants everything checked , but all her demands have already been done by the Chief Engineer . The foam quickly rises as the weed creature moves to attack the Doctor and Jamie , and they discover the lift has been sent back to the top . Fortunately , there is a maintenance ladder . Ignoring the emergency light , Oak and Quill exit the impeller room . The Doctor and Jamie climb the ladder in the emergency shaft and find themselves in an airlock . They open the door and exit . Worried as to her safety , they head off to find Victoria . The helicopter pilot reports foam and weed on all three of the rigs , with no sign of life . Harris asks Jones to allow the rigs to be bombed out of the sea . Perkins thinks this is ridiculous , but Jones is more receptive . Robson bursts in , followed by the Doctor . Robson angrily rejects this idea , treating it like a personal attack . He states that " we won ' t allow this to happen " . When questioned by Jones as to who " we " are he seems confused . He staggers and holds his head before dashing from the room . Again , Jones puts this down to stress , but the Doctor disagrees . Everyone is surprised to see the return of the Doctor . Harris asks after Van Lutyens . The Doctor shakes his head . He explains about the weed and the foam he found in the pipeline . He informs Jones of his theory that Robson is controlled by a force that emanates from the weed . Jones says that that is ridiculous , but Harris says that everything the Doctor has said thus far is true . Meanwhile Jamie is scouring the repository looking for Victoria . The Doctor tells Jones that he believes the weed is a living organism capable of telepathic control . He believes it is parasitic and claims the humans as part of its colony . Suddenly , there is a communication from Control Rig : Baxter is in a panic , saying the creatures are all around them . His cries subside only as the communication is cut off . Jamie locates Victoria prostrate on the steps of the Pipeline Room . For a brief moment he thinks she ' s dead and says how he will never forgive himself if she ' s dead . Unnoticed by Jamie , Victoria ' s eyes flick half - open . She is unsure how she got there but suspects Oak and Quill . Jamie vows his revenge . Victoria , again , complains about how she never feels safe anymore . As they are talking , they hear the heartbeat rising and can see the weed creature through the transparent panel in the pipe . The Doctor believes the weed aims to cut off the gas supply to Britain and take control . His plan is to find the nerve centre . Jamie rushes in , shouting about the appearance of the weed . They bring the Doctor , Jones , and everyone to see it . The Doctor calls it the first part of the invasion . Episode 5 . Price reports that all of the rigs are now out of contact . The Doctor hopes to find the nerve centre of the weed , as it is their best chance to destroy the creature . The Doctor fears the weed has taken over the crew and the rigs . He rejects Harris ' s idea to blow up the rigs ; this would simply spread the weed . The Doctor hypothesises that the weed must have been unearthed through the drilling process and that its first victims must have been the engineers . Since then it has been trying to obtain significant figures to infiltrate the base . Megan Jones realises the weed has under their control the one man who knows the entire structure of the rigs and refinery , Robson , and orders that he be found . The Doctor also realises that pure oxygen must be toxic to the weed , stating that that is why the man who interfered with Victoria in the oxygen store was wearing a gas mask . Oak nods to Quill , and they move off . Oak and Quill move along the corridor to the oxygen store . They stop to put on gas masks and enter the oxygen store . Meanwhile , Robson is found in his quarters . Harris has him guarded . Jones wants to see him , hoping their old friendship will give her a chance to reach him . Harris and Perkins insist on accompanying her . Perkins implores Jones to send for the army , but she brushes this aside . They make their way to Robson ' s cabin , which has a guard posted outside . Jones insists she wants to go in alone , so Harris and Perkins wait outside . She tries several approaches , first warm and sympathetic , then brusque , and orders him , but finds him uncommunicative . In a daze , he cries out that he can no longer be helped and that he can ' t find it . At one point he cries out for help , which brings Harris and Perkins rushing in , but by then he ' s gone into a trance . Harris suggests they leave him . Jones reluctantly nods in agreement and moves towards the door . She takes a last look back at Robson , then follows Harris and Perkins to the door . Jones says their only chance now is to destroy the weed . They head off down the corridor leaving the guard outside . Victoria wishes they could return to the TARDIS , but Jamie tells her they can ' t leave . She is worried that the Doctor looks stumped . Harris , Megan and Perkins enter . The Doctor admits he is at a loss for a plan . The Doctor deduce s that the weed ' s next move is to attack them at the refinery and that they have to attack first . Jones and Harris decide they must put the oxygen supply room under guard . Robson is lying asleep on his bunk when suddenly his eyes flick open . He looks up at the vent and nods as if receiving instructions . Harris gets up and heads for the door . He sneaks up to the guard and disables him with gas from his mouth ; weeds are visibly growing from his arms . Back at the main base of the repository , they discover that all the oxygen has been removed from the store . Harris theorises that it must be an inside job . Oak and Quill leave discreetly , but Jamie and Victoria see them and decide to follow . Jamie calls out after them . Oak and Quill hurry away , but Jamie is close behind . Oak manages to get away as Jamie wrestles with Quill . Quill opens his mouth and hisses gas at Jamie . As Jamie lands a punch on Quill , Victoria screams . Quill sinks to the floor . The Doctor arrives to see what the scuffle was about , but he is soon sent back to the main base by a worried technician . The weed is breaking through the pipeline . Perkins wonders if the Doctor has some hand in all of this . The Doctor and his colleagues enter and discover the weed expanding just as it did in the TARDIS . Robson sneaks up behind the others . Victoria is grabbed and dragged away silently . News of Robson ' s breakout reaches the base as the Perspex casing of the transparent pipeline completely gives way under the pressure of the weed . Everyone panics , and the Doctor attempts to lead everyone away . Jamie realises Victoria is gone . Frantic to find Victoria , the Doctor and Jamie try the exits . Finding the impeller room doors locked , they head for the corridor , but those are locked too . The Doctor manages to wedge a door open as it closes in just enough time for him and Jamie to sneak through . Robson carries Victoria through the central control and outside to a waiting vehicle . He puts Victoria into the passenger seat and hastily drives off . Alarms sound . Harris orders the pipeline closed off and Robson located . Robson drives along a road that leads to a cliff - top . He stops the car a short distance away from a waiting helicopter . He lifts Victoria out of the car and carries her into the helicopter which soon takes off . This is overseen by Harris back at base . Jamie and the Doctor are still looking for Victoria , but Harris locates them and tells them of the latest developments . The Doctor contacts Robson in the helicopter and tells him to come back . Robson gives the Doctor an ultimatum , " If you want her to live come over to us " , before severing communication . The Doctor wants to follow in another helicopter despite the risks in hope it will lead to the nerve centre . Later , the Doctor and Jamie arrive at the helicopter and climb into it . As soon as the Doctor and Jamie are secure , the pilot takes off in pursuit of Robson . Meanwhile , Robson sees the control rig and veers the helicopter towards it . Harris is told the Doctor is airborne and heading to the central rig . Harris says that if he hasn ' t heard from the Doctor in an hour , he is evacuating the compound . Jones tries to argue , but Harris is firm . As the Doctor and Jamie approach the rigs , they see that one rig is covered in foam . The Doctor assumes this must be the nerve centre . As the helicopter closes in , the Doctor throws out a rope ladder . The Doctor descends the rope ladder into the foam below . The foam has no effect on him . Jamie follows . The Doctor and Jamie wave goodbye to the pilot , then disappear into a hatch . They emerge from the hatch into the top of a flight of stairs . They set about exploring . They descend the stairs , looking round cautiously . They hear the cry of Victoria . Jamie sets off but the Doctor stops him , suspecting it to be a trap . They slowly make their way along the corridor , carefully peering round each corner . They approach a door and slowly swing it open to reveal a foam filled room . Robson starts to walk towards them . " Come in Doctor , " he says . " We ' ve been expecting you . " The Doctor and Jamie cautiously investigate the deserted rig . Victoria calls out , but the Doctor advises it may be a trap . Moving with care , they open a door to discover Robson , waist deep in foam , fronds of weed encircling his neck and arms . He has been waiting for them . Episode 6 . Robson tells the Doctor that he will help " our new masters " with the conquest of Earth . Jamie leaves to find Victoria . The Doctor tries to rouse the human side of Robson . Robson opens his mouth and emits a gas at the Doctor . The Doctor , Jamie and Victoria run , pursued by Robson . Victoria screams when she sees Robson . He covers his ears and begins to recoil . Robson retreats into the foam . The Doctor , Jamie and Victoria climb the stairs and emerge through the hatch onto the platform . The helicopter is hovering overhead . They frantically wave at the helicopter , but they cannot be seen due to the foam . The Doctor sees Robson ' s helicopter and decides to hijack it . They disappear into the foam . The Doctor takes off and , despite his boasts that it is a primitive machine compared to the TARDIS , dramatically loses control and ends up having to navigate wildly through the rig system . The repository helps to guide the Doctor in . Harris , Megan Jones , and Perkins await word from the Doctor . Harris thinks they must evacuate , but Jones says the Doctor still has ten minutes . Perkins is ordered to get on to the defence minister and get tanks of oxygen sent at once . Harris and Jones argue as the Doctor returns and tells them he stopped off at the Medicare Centre and found out that Quill has almost completely recovered , the weed has withered and died off his body , and that noise was the answer . The Doctor has finally realised it was Victoria ' s scream that has always repelled the weed . The Doctor begs of Harris half an hour to kill the weed at the Control Rig , its nerve centre , by sending massive waves of noise through the pipelines from the refinery . Using equipment in the refinery ' s Control Hall , Price records Victoria ' s screams as she sees the weed breaking in through the impeller shaft . Harris is initially sceptical but soon concurs . The Doctor inspects the electrical circuits at the control centre and attempts to boost the transmission through the use of Price ' s equipment . Unbeknownst to the rest of them , the door to the impeller shaft gives way and foam and weed flood through . In the main room , Victoria is unable to scream so as to record it on Price ' s equipment . As the room implores her , she looks towards the impeller room doors and sees the advancing foam . She screams . Foam builds up behind the air - lock doors . The air - lock doors give way and foam washes through . Harris begins the evacuation . The Doctor begs for a few more minutes — he has just amplified the sound wave to make them sonic . This will deal with the foam and weed on the rigs ; the ones at the repository will be dealt with by speakers . Harris and the Chief Engineer turn to see foam advancing along the corridor . Harris closes the doors . The creature is trying to break through into the control room . Eventually it breaks through . The engineers point their speakers at the creature but Price has frozen with fear . The Doctor is forced to risk it and darts to the control centre to switch on the sound wave . The sound rings out through the base , and the creature is vanquished . Harris sends out helicopters to check the rigs while Jones thanks the Doctor . Victoria , however , is disconsolate . Harris reports all rigs are safe . Robson and Maggie suddenly appear on the monitor from the Control Rig , alive and well ; everyone taken over by the weed creature has been released — including Van Lutyens . Harris sends out helicopters to collect them . Having dinner at the Harrises ' , Robson , the Doctor , Jamie , and Victoria enjoy their hospitality . Robson leaves , and the Doctor and Jamie prepare to leave too . Victoria remains seated , tears welling up in her eyes . The Doctor realises , however , that Victoria doesn ' t want to go back to the TARDIS . The Doctor asks the Harrises if they would mind Victoria staying with them for a time , to which they quickly agree . Jamie is resistant to this idea , but the Doctor insists that they respect Victoria ' s decision . Price begins the process of closing up for the night , the impeller is functioning again and Robson is snapping at the technicians . All is well at the repository . Victoria sits on the darkened patio . Jamie comes out to try to persuade her , but she insists she wants to remain in this time . She is not cut out for life with the Doctor , but can ' t go back to her own time . In the morning , the Doctor and Jamie return to the TARDIS without Victoria . Jamie still doesn ' t want to leave Victoria behind . Asked where he ' d like to go , Jamie tells the Doctor , despondently , that he couldn ' t care less . Victoria watches one last time as the TARDIS rises above the water and dematerialises out of her life . Story notes . Production errors . " to be added " Home video and audio releases . Surviving clips from this serial are viewable as special features on the " Lost in Time " DVD release . A CD and cassette of the story have been released , containing the audio from the original television programme . Narrative from Tom Baker was added on to the cassette release , whilst the CD was narrated by Frazer Hines .