Spare Parts ( audio story ) It was the partial inspiration for two 2006 " Doctor Who " television episodes — " The Age of Steel " and " Rise of the Cybermen " , on which " Spare Parts " writer Marc Platt received acknowledgement . Publisher ' s summary . " I ' m not even sure they are people by the end . They ' re just so many tinned left - overs . . . " On a dark frozen planet where no planet should be , in a doomed city with a sky of stone , the last denizens of Earth ' s long - lost twin will pay any price to survive , even if the laser scalpel s cost them their love and hate and human ity . And in the Mat - infested streets , round about tea - time , the Fifth Doctor and Nyssa unearth a black market in secondhand body parts and run the gauntlet of augmented police and their augmented horse s . And just between the tramstop and the picturehouse , the Doctor ' s worst suspicions are finally confirmed : the Cybermen have only just begun , and the Doctor will be , just as he always has been , their saviour . . . Plot . Surfacing ( 1 ) . 1950s - style newsreel footage crackles across the airways explaining that it ' s been 6 years since anyone stepped onto the surface of the the planet . A voice from the Central Committee wishes the astronaut good luck as he steps from the capsule . We hear heavy breathing as he steps out of the rocket . His breathing becomes more laboured , he screams and is killed . Nyssa reads the marquee on the top of a picture house . The Doctor explains that that film sounds particularly tawdry . He notices that the cinema has been boarded up for years . Nyssa replies that a boarded up picture house doesn ' t prove that they ' ve landed on Earth . The Doctor tells her that coming here was probably not a good idea and she replies that the Doctor didn ' t say much at all , just that the coordinates weren ' t right . Nyssa determines that they haven ' t landed on Earth , but the Doctor refuses to tell her where they have landed . The streets are empty and the atmosphere is stuffy , like a hothouse . The Doctor tries to convince her that have they landed in the heart of London in the 1950s , but she knows that cities on Earth weren ' t built into stone caverns and that Earth isn ' t a grey planet drifting light years from any star . The Doctor knows that he ' s not on Earth and tells Nyssa that they should leave , but convinces himself to explore for a half hour and then meet back at the TARDIS . They split up ; he tells Nyssa to explore but not get involved . Mr Hartley and his daughter Yvonne chase a Deluxe Mark VI Cybermat under a timber stack . Dad tries to catch it but it turns out there ' s a swarm of them . The timbers fall on him , crushing his chest . Yvonne calls for help as Nyssa comes up to see what ' s wrong . Yvonne coughs , telling Nyssa that she needs her pills , which she takes . Together they lift the timbers off Mr Hartley and pull him out , but he doesn ' t appear to be moving . Nyssa checks and notices that he ' s not breathing and doesn ' t have a pulse . She thinks he ' s dead . Mr Hartley pops up , stating he ' s fine except for his arm . Nyssa has gotten dust on her clothes , and being so close to lights out , they insist that she come back to their house to be cleaned up . She argues , stating she has to meet someone , but follows the two back to the house . The Doctor explores and finds a shop that is closed for the night . The owner of the shop walks out , telling him that he won ' t be able to do much exploring since it ' s close to lights out . When the Doctor introduces himself , the man asks if he is in public or private practice and asks for identity papers and ration book , both of which the Doctor says he ' s lost . The man notices that the Doctor does not have any transplants and that he appears very healthy . The Doctor states he thought artificial organs were all the rage . The man mentions the Committee and their new gadgetry , but there is still a waiting list for natural transplants . Reading the sign over the shop , the Doctor determines the man is Thomas Dodd , " purveyor and fitter of necessary bodily parts " . The Doctor asks Dodd to tell him about the city . Thomas invites the Doctor inside for a drink to talk about it . Mr Hartley and Yvonne take Nyssa back to their home . As they enter , Yvonne spots Sisterman Constant in the living room . Her brother , Frank Hartley , walks in saying the Sisterman ' s been waiting for them . Frank asks who Nyssa is , she introduces herself and Mr Hartley says she missed the last tram home and they invited her in . The Sisterman asks if she knows Nyssa , who Mr Hartley tells her is from the South District and out of her jurisdiction . Constant then asks how Yvonne is feeling and if her medication is working , and asks Mr Hartley how he is after his cardioectomy . He says normal except he can feel the paddles moving in the chest unit . She notices his arm and Mr Hartley says it ' s nothing , saying he doesn ' t want or can afford to replace it . Sisterman asks for Nyssa ' s last name , which she gives as " of Traken " , and asks for identification papers . Nyssa tells Sisterman Constant off and she heads out of the apartment . Frank asks about " a call up " and Sisterman tells him he ' s too young . Nyssa still wishes to leave , but the family won ' t let her go telling her it still isn ' t safe after dark in the city . Constant makes a phone call , telling whoever is on the other end that she has a selectee at the Hartley ' s address and reports a stranger at the same address . She also advises that patrols be on the lookout for any other " unregistered strangers " . Dodd sits down , pouring himself a drink and asking ( again ) if the Doctor would like one . The Doctor asks the population of the city , which Dodd replies is down to a few thousand . The Doctor then asks if this is the last inhabited city on Mondas . Dodd thinks he ' s crazy , but the Doctor has one of his questions answered . He leaves Dodd ' s shop and heads back towards the TARDIS , with Dodd in pursuit . As he walks , he meets a police officer on horseback who tells him to stop . The officer tells them to identify themselves , as civilian movement is restricted . The Doctor notices that the Cyberman doesn ' t have the blank mask yet and still human except for some augmented body work and not advanced as he thought . The Cyberman whips him , knocking him down . He demands his identification papers to which the Doctor replies that he doesn ' t have an identity to them , not yet at least . As the officer is questioning him , the Doctor pulls out a Chinese Cracker and matches , lighting it and startling the horse . Dodd and the Doctor run as the Cyberman calls for assistance . Nyssa is clearing the table from dinner as Frank truants his sister about her friend Eric Krailford . Mr Hartley tells Frank to go do his homework . Yvonne whistles to her trillaby mat 2 , a cybernetic bird . Mr Hartley asks Nyssa if she could fix his chestbox . As she works on it , the family hears a noise outside their apartment . Mr Hartley tells Frank to turn on the television to drown out the sound . Their neighbour , Mrs Ginsburg , is taken by the police . Nyssa tries to help , but notices the windows are all boarded up . A moment later , they hear a large number of patrol vehicles driving through the streets . They all ignore it , saying they don ' t want to get involved and begin to talk about the holiday decorations they have to put up . The Doctor hears the patrols pass by and confronts Dodd for following him . They notice a mechanical digger passing by on a truck and Dodd tells the Doctor that whole areas of the city have been blocked off . Dodd says its for new parade ground . The Doctor suggests they take a look and head towards the old abandoned church . Mr Hartley takes a raggedy old tree out and the family begins to pull out the decorations to go on it , including a big star . Yvonne asks if Nyssa has a posh tree at her house and Nyssa tells her about an autumn festival where the people wind up pelting each other with fruit . Yvonne says there are no more trees , except where she works at the hydra house where she works . Nyssa is worried about the old woman who was taken . Yvonne tells her that the Committee does what they think is best . As they move the box of decorations , Yvonne ' s pet Cybermat who she calls Matti appears . Nyssa is confused as to what it is . Matti doesn ' t come when Yvonne calls it and Nyssa offers to take a look at it . The Doctor and Dodd climb the stairs to the top of the bell tower . Dodd tells him you could see the entire city before the church was abandoned . The Doctor replies that all the old temples of worship , the church and the picture house , closing . Dodd thinks the patrols are levelling the area around the city for a new parade grounds . The Doctor replies that they ' re not touching the buildings . Dodd notices that the patrols are digging up the graveyards . As they talk , a Cyberman comes up the stairs telling the two men not to move ; they are escapees and required for adjudication . Frank complains that Nyssa didn ' t touch her dinner and they ' ve now wasted all their rations for the holiday . He tells his Dad that the work crews are on the verge of breaking through the city to get to the planet surface , but Mr Hartley thinks that ' s a long way off . . . if ever . Frank tells Mr Hartley that he wants to join the work crews . He refuses to let him join as he ' s too young and he ' d never come back from the crews , continuing that no one ' s ever come back . Yvonne begins coughing again . Frank yells about giving away their rations and storms out of the house . Yvonne takes her pills and the coughing stops . Nyssa insists that she leaves and will bring back food for the Hartley ' s . Suddenly , there ' s banging outside the house . Mr Hartley tells Yvonne to take Nyssa to the back room and he ' ll hold them off as long as he can . The Cyberman tells the Doctor and Dodd that the bell tower is restricted to civilians . The Doctor questions why , but the Cyberman tells them they are recognised criminals required by adjudication by the Committee . The two overpower the Cyberman and use the bell ropes to make the church bell ring . The Doctor asks Dodd if he has thought about the future of the city saying it is headed for extinction . He tells Dodd that the Cybermen are the future and that he may not be able to stop it , but he can give the city a wakeup call . The church bells ring loudly through the city as he tells Dodd he can help stop the horror of the Cybermen . Patrols enter the Hartley apartment , pushing his way past Mr Hartley . Yvonne gives Nyssa her Cybermat and helps her slip out the back door and into the alley as the Cybermen begin their search . Frank tells the patrols that Nyssa is in the back room , but she ' s already gone . Mr Hartley hears the bells in the church tower ring and the family goes out into the streets to investigate . Yvonne asks if it ' s a warning . The Doctor pushes past the crowd and finds Nyssa in the square . The two enter the TARDIS . Nyssa questions the Doctor , telling him that the planet isn ' t Earth . The Doctor replies that it isn ' t , but had to make sure it was the planet he thought it was before they leave . Nyssa now knows that this is Mondas and the people here are destined to become the Cybermen . The Doctor explains that they can ' t interfere but the bell is a wake up call so the people can see what ' s happening and can stop it before it ' s too late . He tells Nyssa that the people have to change the future , they can ' t do it . Cyber Commander Zheng sends a message stating police patrols have reported a disturbance in the city and that hostile intruders have been observed . An electronic noise replies through his communicator . The Committee replies telling him that the insurgency must be crushed and the intruders found and eliminated immediately . Necessary Force ( 2 ) . The Doctor tells Nyssa that the people of Mondas must decide the future for themselves . She tells him that they ' re good people and they ' re suffering and if he won ' t stay to help , she will . Nyssa then tells him that she wants to stop the Cyberman from coming into being . The Doctor explains that if she stops one history , it will just be replaced with another , possibly just as bad . As they talk , their conversation is being monitored . The Doctor continues on about becoming involved , how sometimes you do and sometimes you don ' t . Nyssa tells him that he should have thought of that when it came to sacrificing Adric . He feels terrible about that and Nyssa heads back to collect her things . Crowds are still gathered near the church . The police attempt to disburse them but they yell at them about digging up the graveyards . Sisterman Constant arrives and is told that the Committee advises force may be necessary to disburse the crowd . The bells stop and troops are sent in with whips to move the crowd out of the area . Nyssa comes back to the control room and apologises for how she acted , including about Adric . The Doctor replies that they never had a chance to mourn him . Nyssa says that she just wants to take the Hartleys some food and provisions . She tells him that everything is rationed by the Committee . The Doctor says that are signs of cybertechnology everywhere , including the police . Nyssa goes to show the Doctor the Cybermat that Yvonne gave her but it ' s gone . He screams at her for bringing that into the TARDIS . Doctorman Allan calls for a nurse to come to one of the operating rooms . A cyberman is having problems with his pulmonary unit rejecting . She tries but is unable to save him . Sisterman Constant comes in and notices two Cybermen have died . Allan tells her that is the third one back from the surface and that the processing won ' t stabilise . Allan pours herself a drink and offers one to Constant , who refuses . She says her staff is exhausted , working all hours with no resources but the Committee just wants more people processed . Allan wants to stop all conversions and rethink the processing . Sisterman Constant relates the story of the riot in the city to Allen who laughs and continues drinking . She thinks they should call off digging up the graveyard , as if dead bones would help . Constant talks about Nyssa to Doctorman Allen who is then suddenly called to appear before the Committee . She can ' t understand how strangers could even exist . Constant storms off after being tempted by Allen with a glass of wine . Doctorman Allen calls the switchboard , asking to be transferred to the surveillance department . The Doctor and Nyssa continue to search for the Cybermat . Alarms sound and they run to the TARDIS control room to find the console on fire . The Doctor quickly puts it out but discovers an energy leak that could cause the TARDIS to explode . Nyssa stops it by hitting the isolator failsafe . They open the console and find the Cybermat destroyed ; it chewed into the energy conduit . Nyssa volunteers to repair the damage and the Doctor heads out for some fresh air . Doctorman Allan is contacted by the Committee who tells her that resources are low and soon life will be unsustainable in the city . She scolds them by saying they mean " Human Life " . The Committee tells her that she must work faster . She replies by saying that the staff is overworked and the death rate is increasing on the work crews . The Committee offers more resources but Allan says that old bones won ' t work . They say that processing will be increased . Doctorman Allan wants more time to find a solution . The Committee discusses it and disagrees . They decide that the city uses too many vital resources and will be shut down . Allen calls them insane and wants to know what could be more important than saving the people . The Committee answers , " We must survive " . The Doctor steps out of the TARDIS and finds another Cybermat . He tries to get it away from the door , when Frank shows up . He tells the Doctor that is a Mark XII surveillance model and that the Committee uses them . He introduces himself and meets Frank , who he thanks for looking after Nyssa earlier . Frank tells the Doctor that the police came by to look for her which upsets the Doctor . The Doctor opens the door , telling Frank he can find Nyssa inside the TARDIS and to inform her he has a call to make . Frank steps in and soon tells Nyssa about the visit from the police . He then shows her a piece of paper saying Yvonne is being called up to the work crews and she ' s left already . Mr Hartley sent Frank to find Nyssa . She tries to console Frank but he is angry that she got the notice and not him . The Committee discusses if Doctorman Allan understands her task . They say she still has an illogical mind . The Committee thinks that riot in the city was started by the strangers and that they have one of them under observation . The Doctor is under observation through the Cybermat by Doctorman Allan . The Doctor wants to head back to Thomas Dodd ' s shop but he has no money for the tram . Constant knocks on Allan ' s door and is offered a drink , which she again refuses . Constant tells her there are recruits waiting for processing . Constant asks how the meeting with The Committee went . Allan replies that processing quotas are to be updated and eventually it ' ll be processing for everyone . She tells Constant that no one will be exempt . Constant runs off to tell the other Sistermen about the new quotas . Doctorman Allan decides its time to get a better look at our stranger . The Doctor runs after a truck flagging it down , saying they ' re dropping cargo all over the road . The Cyberman exits the truck and recognises the Doctor . He takes the Cyberman to the back of the truck , again saying the cargo is all over the road . When the Cyberman disagrees , the Doctor loosens the ropes causing the bones to fall on top of him , then takes the truck and drives away . The Cyberman calls in a report that he has found the intruder and is driving off . Nyssa and Frank are in the TARDIS still working on repairs . She tells Frank that the Cybermat destroyed the console . He says it ' s the energy that attracts them . Nyssa continues sealing the cables . She asks Frank if the call up involves some kind of processing . He says it ' s augmentation . They hear a noise and turning the viewer on , Nyssa and Frank see a swarm of Cybermats heading towards the TARDIS . Sisterman Constant walks up and down the lines of recruits for processing . Doctorman Allan leaves her in charge , as she has an errand to run . As she walks , Constant sees Yvonne . She asks Constant when she gets her uniform , as she wanted her Dad to see her before she left . Allan leaves as Constant continues walking down the line of recruits . The Committee decides that the city is a drain on resources and must be shut down so they can survive . They decide that Zheng must be summoned and the intruders must be apprehended . Zheng communicates to the Committee that Mondas is entering the region of unstable space sooner than expected and asks that emergency strategies be implemented immediately . The Committee summons Doctorman Allan who does not answer . They determine she is no longer reliable . The Committee decides to delay emergency strategy and bring Zheng down from the surface to restore order . In Dodd ' s shop , Mr Hartley is talking to Dodd about some credit , since he used up all his rations when Nyssa was at the house . While this is happening , the Doctor walks in . Dodd refuses credit for Mr Hartley . Hartley asks if the Doctor is a friend of Nyssa . The two introduce themselves . Dodd pushes Hartley out of the shop to speak to the Doctor . Dodd finally asks the Doctor what he wants . . . The swarm of Cybermat s are pushing their way into the TARDIS . Frank is worried about being overrun , but Nyssa tells him that the ship can stand up to far worse . Nyssa then questions if Frank shut the outer door . Frank looks over as the door begins to buckle . The Doctor tells Dodd that he wants to get to the Committee Palace . He needs to see how far along the processing has gone . The Doctor scolds Dodd for the way he packages his stock . Dodd complains that people want titanium and plastic , not what he ' s got to offer . Dodd complains that the process makes people go mad , so they have their emotions removed as well . He opens the door to the cold storage room and , as the Doctor steps inside , Dodd closes the door locking him in . Nyssa decides that the way to stop the Cybermats is to reroute the energy to the TARDIS ' outer shell , which fries the mats . She decides to pick up some food and head over to the Hartley home . Yvonne stands in line , sobbing , wanting to leave and go back to her home . A Cyberman walks to her and takes to the processing area . We hear the machinery working as her processing begins . The Doctor stares at the temperature gauge on the cold storage door , seeing it drop . The Cybermat got trapped in the room with the Doctor and he decides to test its defences before its owner comes to collect it . The Cybermen break down Dodd ' s door looking for the Doctor . Dodd tells them that he ' s escaped through the back door . The Cybermen open the cold storage door and find the Doctor inside . The Cyberman leader tells the others to destroy him . The Doctor brings down some of the storage boxes on top of them , giving him a chance to escape . The Doctor finds the policeman ' s cyber - converted horse . The horse bucks against the Doctor . Allan shows up at the same time as the Cyberman and overrides his commands concerning the Doctor taking him to her laboratory . Dodd is also taken away by Doctorman Allan . Frank shows up at the house with Nyssa , who brought provisions . Mr Hartley says he met the Doctor at Dodd ' s place . Frank is furious wanting to know what he ' s doing there , but Mr Hartley avoids the question . The television broadcasts , again in ' 50s newsreel style , the new uniforms the cyberworkers will be wearing on the surface . Frank exclaims that they ' re no where near the surface . Nyssa tells them that they ' re not uniforms , they ' re fully processed Cybermen . The power suddenly goes out in the city . Sisterman Constant is ordering staff to get the backup generators working , as the recruits ' programming hasn ' t been completed yet . The evacuation bell rings . The staff tries to restrain the partically processed recruits who are asking what their task is . Constant asks where Doctorman Allan is . Constant hears a noise coming through the communication system and realises that it ' s the Committee . A loud rumble echos through the city . The Doctor tells Dodd that the air pressure has dropped . Dodd replies that it sounds like the roof is caving in . The police continue to push the citisens of the city through the Committee gates . Dodd doesn ' t want to go inside . The Doctor thinks that he might have been wrong , that Mondas may not have a future after all . Popping the Seals ( 3 ) . As the Doctor and Dodd are being pushed through the gates , a piece of the roof falls in and crushes the policeman . The Doctor and Dodd run into the Committee palace to escape the rubble . A partically processed Cyberman asks Sisterman Constant about their tasks . She tells them that they are to stay where they are until the power is restored . Doctorman Allan shows up asking why the recruits are here . Constant explains about the loss of power and how the staff is trying to contain them , but at least one walked away . Constant says the recruits don ' t understand , but the cyber - recruit answers that he does understand , saying he is the future and asks again about his tasks . Allan tells him that they all have to wait . She asks about the Committee , saying without power they will die . The hospital has been cut off and no one can leave . Allan decides the Committee is in trouble . The cyber - recruit tells Allan that their first imperative is to protect the Committee and asks where they are . Allan tells them to continue waiting . The cyber - recruit advises that if anyone threatens the Committee , they will be destroyed . The Doctor and Dodd get away from the policeman and are hiding in the palace . The Doctor notices that it ' s beginning to get colder , that the outside is getting in . Dodd asks if they ' re safer in there , to which the Doctor explains that it depends on what ' s in here . They find a number of statues , which are gold leaf . The Doctor scrapes some of it off , thinking it could come in handy later on . He asks Dodd what happened to the former leaders and Dodd tells him that they were executed . The Doctor wants to know where the Committee is ; he wants to see them for himself . Dodd says that no one sees the Committee . A cyber - recruit wanders into the palace , asking what their task is . The recruit sees the Doctor steps out . Dodd says how horrible it is , that it ' s not even human anymore . The Doctor wonders why it doesn ' t know its task and asks who it used to be . The cyber recruit remembers , " Father must be my uniform " and repeats the Hartley ' s address . The Doctor tells Dodd that the recruit is still wired and fresh from processing . He says it ' s Dodd ' s future : a Cyberman . Nyssa says that it is snowing outside . Mr Hartley says they don ' t get weather anymore and this would be a blizzard . Frank tells Nyssa that the work crews were drilling to the surface . Mr Hartley thinks its beautiful . Nyssa says she has to find the Doctor . Doctorman Allan tells the cyber recruit that she has to reach the Committee chamber . The recruit says they have to protect the Committee . Allan convinces him that she needs to get the generators restarted . After considering , the recruit says she can go but one of them will accompany her . Dodd and the Doctor are still roaming the palace , when the Doctor finds body containment suits . He deduces that they ' re going to start processing on an industrial scale . Dodd has seen enough and leaves . Doctorman Allan comes down the hall with the cyber recruit . She tells him to keep watch , but he insists that he musts escort her . The Doctor comes out from his hiding and throws the gold leaf from the statue at him . Unexpectedly , it has no effect . The Cyberman attacks the Doctor . Doctorman Allan disables the Cyberman with a failsafe override , which only works during processing . The Doctor questions if the processing was complete . The Doctor offers to help get the generators back on line . Doctorman Allan doesn ' t trust him , but doesn ' t have much choice and they head to the generators . Nyssa and Frank arrive at the TARDIS and begin banging on the door . There ' s no answer from the Doctor . She decides that they should try the Committee palace ; they can try to find Yvonne there too . As they ' re about to leave , they see lights coming at them . The police are in the area . They leave and go in another direction towards the palace . The Doctor and Allan arrive at the generator chamber . The Doctor notices that they are using Geothermal power . Allan looks at the printouts and notices that every failsafe has been activated . The Doctor surmises that someone has been making enormous demands on the power . He tells Allan that time is running out and the planet is heading towards the Cherrybowl Nebula . The Doctor questions Allan quickly about the Committee : how it is a single entity and opens a door to find an empty room . The Doctor tells her that there is no Committee anymore . Suddenly , electronic noises fill the area . Allan exclaims that they ' re still alive . The cyber - recruit tells Sisterman Constant they can ' t wait any longer . She tries to leave but the cyber - recruit tells her to stay where she is . They tell her that she should become like them ; her ability to feel cold is a weakness . She says they were built for a purpose . The cyber - recruits repeat that . They say she knows their purpose and must tell them . The cyber - recruit grabs her arm , holding her tightly . The door opens and Zheng and his squad enter the ward , assuming control . He tells the recruit of release Constant . The recruit refuses and Zheng shoots him . Zheng tells them to return to their task . Constant tells him that the processing cut out because of the power . Zheng has his squad take the recruits back to the processing section . He wants to know why the power hasn ' t been restored and if the Committee is safe . Constant tells Zheng that Doctorman Allan is down there now . Zheng notices that Constant ' s arm is broken and orders his squad to take the fallen recruit and Sisterman Constant to the reassembly area . Zheng tells her that resistance will not be tolerated . The Doctor scolds Doctorman Allan about the Committee , calling it a " cybernetic multi - headed hydra " and now knowing why the generators are putting out so much power . Doctorman Allan explains that twenty of the greatest minds joined together in order to propose solutions to their problems . The Doctor describes the Committee saying they ' re swollen heads wired into the system with bodies withering like rotten fruit . Zheng enters the generator room asking why the power is not back on and who the Doctor is . He introduces himself as Allan ' s assistant and he ' s the only one who can restore the generators . The Committee comes alive and tells her that the main objective is to restore the power . Zheng reports to the Committee that radiation levels on the surface have increased and work on the propulsion systems was stopped because of the power loss . The Doctor realises now why Allan created the Cybermen ; they built a propulsion system for the planet but only Cybermen would be able to install it due to radiation levels . Allan explains that now these conditions are extending into the city . She says without power , Mondas will be a dead world . Frank and Nyssa knock loudly on the Hartley ' s apartment door . Nyssa notices a swarm of Cybermats following them . As Mr Hartley opens the door , Nyssa notices the swarm leaving . A Cyberman comes up the walk and smashes through the front door . The Doctor determines that the machinery is burnt out and he ' ll have to close the links manually . Grabbing a metal rod , he closes each circuit individually , saying the only real solution is to lead Mondas away from the nebula . Zheng tells the Doctor that the propulsion system is completely operational . The Doctor determines that only fully cybernetic workers are able to withstand the pressures ; Doctorman Allan tells him the survival rate on the surface is only 19 % . The Doctor continues closing the circuits . The Cyberman breaks through the door of the apartment . Seeing Mr Hartley , the Cyberman becomes distressed . They realise that the Cyberman is Yvonne . Mr Hartley tries to remove the mask and Yvonne becomes crazed and begins to wreck the apartment . The Doctor is down to two circuits left and asks what happens afterwards . Zheng states the Committee will restore order , but the Doctor and Doctorman Allan tell him that power must first go back to the city . The Doctor threatens to smash every circuit if they don ' t agree . The Committee agrees to their demands . The Doctor tries to throw the final circuit but it ' s jammed . He forces it out as Zheng throws the switch restoring power . The Doctor screams as the power is restored , taking the full force of the power levels . Doctorman Allan says he ' s dead . Yvonne moves wildly around the apartment , smashing whatever is in her path . Nyssa and the others try to hold her . The power goes back on and Yvonne ' s bird begins to sing and the lights on the tree come on . Yvonne is fascinated by the lights and sounds . Mr Hartley takes her over to the tree , trying to help her to remember what each items stands for . Yvonne begins to cry . Sisterman Constant is strapped to the processing conveyor as the power comes back on . She pleads with the Cyberman to take her off the belt . Her voice fades as she goes through the conversion process . The Committee is back on line and quickly decides that the propulsion system must be tested and an evaluation of the city must be completed . The Doctor wakes up looking for Nyssa . Doctorman Allan tells him to rest . She tells Zheng that the Doctor took the entire power supply and is hardly burnt . She wants to do a complete physical assessment of the Doctor thinking that using his physiology , she can create more effective Cybermen . Yvonne stops moving and falls to the floor . Nyssa determines that she ' s receiving radio signals now that the power has been restored . Yvonne calls for her father and Frank as she dies . Doctorman Allan places the Doctor on the scanner table . He continues to ask about Nyssa and if she ' s all right . Zheng tells Allan that Constant has been sent for processing . Zheng tells Allan to look at the Doctor ' s scans . Frank sits on the steps outside the apartment looking to the North . Nyssa goes out to him and sees that the frozen atmosphere has broken through the roof and a mist is enveloping the city . Frank says that its gotten to the hydrahouse , where they grow all the crops and if they don ' t freeze they ' ll starve to death . The Doctor is woken up by Dodd who was unable to get out of the palace gates . The Doctor is too weak from the testing to stand up . He asks Dodd to phone Mr Hartley and see if Nyssa is there . Dodd asks what he ' ll get in return , and he ' ll need new stock for his shop . Frank is still sitting outside in the cold . Nyssa tells him to come inside as his father is asking for him . Frank yells at her ; asking who she ' s ever lost . The phone rings and Frank answers then hands the phone to Nyssa . The Doctor tells her that he ' s in the Committee palace and wants her to grab a few things from the TARDIS workshop . She quickly tells him that she can ' t get in , as it ' s locked and she doesn ' t have a key . The Doctor thanks her and says he ' ll try something else . Suddenly , another Cyberman breaks through the apartment door telling Nyssa that she will come with him . The Doctor hears the commotion on the phone and realises something is wrong . Doctorman Allan walks in with Zheng . Zheng grabs Dodd and takes him down for processing . Allan shows the Committee the scans from The Doctor . They notice he has two hearts , but Allan tells them there is a small lobe at the base of his skull which deals with bodily and motor functions . She thinks she can use that to optimise data for the Cybermen . She thinks she can reproduce this in all new cyberprocessing and there will be no need for organ rejection . The Committee agrees and says this is to begin immediately . The Doctor refuses saying he will be no part of this . Allan pleads with him . The Committee tells Allan to begin , that they will survive and will be invincible . Shelter ( 4 ) . Mr Hartley sits with Yvonne ' s cyber converted body . Frank tries to get him to leave her and says that the police took Nyssa . Mr Hartley ignores him , still watching his daughter . The Doctor struggles as Doctorman Allan begins her scans . The Doctor screams that he will not be a part of this , asking how Allan can do this to her people . She replies that this is the only way they can survive ; only Cybermen can go on the surface of the planet and save Mondas . The Doctor hisses that he will not assist her in her tests . The Committee questions Zheng as to why the propulsion systems have not been testing . He states the power is not full yet . Power is also needed for the shields over the city . The Committee talks among themselves , then tells Zheng that all citizens of the city must go for cyber conversion . They tell him to begin with police and nursing staff . There are more explosions and Mr Hartley tells Frank that the ice flow has gotten as far as the church . An announcement is broadcast that there is a state of emergency and all citizens will be sheltered in the Committee Palace . Allan notices that the turbulence is getting worse . The Doctor tells her to get the propulsion system working . Nyssa sees the Doctor and runs in to see him . Zheng ordered her to be brought in for questioning . The Doctor says that Nyssa can help Allan . Allan tells the police that Nyssa is to stay with her . Nyssa tells the Doctor and Allan what ' s going on outside . Nyssa tells Allan that cyberprocessing killed Yvonne . She is shocked as full processing was only to be for selected workers . Zheng tells Allan that all citizens are to be processed and his staff is not programmed to do the operations . Zheng then notices Nyssa and asks why she wasn ' t brought to him for interrogation . Allan says that she can help with the new template . Zheng relieves Allen of her duties and begins the Doctor ' s scan himself . Allan screams that the Cybermen are her works . Zheng says she should be proud , while she still has the capacity . The Doctor screams as the scan starts ; the Committee tries to get into the Doctor ' s head . They argue about Mondas ' future and the survival of their people . Zheng continues his work . The Committee tells the Doctor that he will soon be just like them . He screams and passes out . The Committee discusses the Doctor and decide that he will be processed . They decide that they are the future , and the cyber race is secure . Nyssa asks how much longer the scan will take . Doctorman Allan is pouring herself another glass of wine . Zheng tells her that it is nearly completed . Another Cyberman comes in to tell Zheng that the citizens are at the gate . He decides to go to the gates and leaves Doctorman Allan in charge . Frank and Mr Hartley stand at the gates with the rest of the population . Franks asks how much longer and says it ' s getting colder . Mr Hartley refuses to go inside . There is a crackling noise and Frank asks what that is and Mr Hartley tells him to get back . Zheng says that if the crowd does not go through the open gates , he will use their emotional responses against them and drive them in . He orders the troops to be ready for the intake of the population . The scanner finishes its processing and Nyssa quickly opens the door to find the Doctor gone . Allan laughs and continues drinking . Nyssa screams at her that she tricked her and the Doctor has been processed . The outer door slides open and a Cyberman enters . Allan marvels at the smooth movement of the new design . Nyssa calls to the Cyberman , thinking it ' s the Doctor . Allan laughs as the Cyberman is summoned with new order and leaves . Cybermen come from behind the crowds to force them inside the palace gates , using whips . Mr Hartley tries to resist but is hit with the whip and moves inside . The Committee asks for Zheng ' s report . He says the crowds are resisting and the Committee tells him that more power must go to the processing centre and resistance must be crushed . Zheng tells the Committee the propulsion unit is ready for testing and power must be diverted . The Committee says that the security of the Cyber - Planner overrides all commands . Nyssa asks Allan if there is a way to stop the Committee . She doesn ' t care and continues drinking . Nyssa explains that the Doctor and Adric and countless others have been killed by her Cybermen and she has to find the Committee . Allan says she knew she was right and should thank the Doctor for what he ' s done to help . The outer door slides open and the Doctor walks in . Nyssa says she thought that the Cyberman who walked in was the Doctor . Allan explains that was the first recruit from the Doctor ' s new template ; he used to be Thomas Dodd and the template is on its way to the processing line . The Doctor laments that every Cyberman he ' ll ever meet is now based on him . They decide that there must be some way of stopping the Committee . They decide that since medical supplies are not available , they will pour Allan ' s wine into the nutrient that feeds the Committee . The Cybermen are continuing to force the citizens into the Committee palace . Frank and Mr Hartley try to move away from the crowds as the ice outside causes the roof of the city to cave in . The Doctor and Nyssa begin to pour the wine into the nutrient that feeds the Committee . Allan grabs at the bottle . She and Nyssa struggle and Nyssa pushes her down . Allan storms out of the room heading to see the Committee . The Doctor now decides that he can destroy the Cybermen since they ' re been created in his image . Nyssa wonders that if the Cybermen are the only way the people of Mondas can survive , do they have the right to change that . The Doctor replies that the people think this is the end , but we know its only the beginning . They keep pouring the wine into the vat . A Cyberman from the surface contacts Zheng to tell him that radiation is increasing and power must be restored to the propulsion system . Zheng heads to the Committee to receive the order , meeting Doctorman Allan in the hall . She tries to tell Zheng that the Doctor is trying to poison the Committee . Zheng asks what is more important , the Committee or Mondas . She tries to stop Zheng to warn the Committee herself . Frank and Mr Hartley are hiding in the halls near where the conversation is happening . They heard Allan mention the Doctor and run off to try to find him and Nyssa . The Doctor and Nyssa finish pouring in the wine . They look out to the city and see that half the city is buried under the glacier . They decide they must change Mondas ' course , it won ' t be able to survive against the endless cold . A Cyberman walks up to them , saying that all civilians must be taken for processing . The Doctor tries to reason with the Cyberman , but he grabs he and Nyssa . Frank comes up from behind and hits the Cyberman with something , forcing it to let go . The Doctor and Frank , along with Mr Hartley , grabs the Cyberman and throw it out a window to the ground below . The Doctor and Mr Hartley head towards the Committee . Frank stops Nyssa , apologising for how he acted before . They look down and see a squadron of Cyberman . Frank tells her they ' re processing everyone . They run off to warn the Doctor . A Cyberman grabs Nyssa and Frank saying they are to be processed . The Doctor and Mr Hartley reach the generator . They discuss quickly how to divert the power when they hear Doctorman Allan yelling , trying to persuade the Committee about the wine in the feed lines . They state that nothing has been detected . They also decide Doctorman Allan is no longer needed . Zheng reports that the surface crews need power to the propulsion system and that they must get away from the Nebula . Allan keeps screaming about how the Committee has decided to process everyone . Zheng again states that the propulsion system must be activated . Allan says the roof must also be repaired . The Committee ignores Zheng and has Allan taken away for processing . Mr Hartley tells the Doctor that if they can alter the energy pulse , it can act like a huge mat trap . The Doctor distracts a Cyberman so that Mr Hartley can work on the generator . Doctorman Allan is taken to the processing centre , where she meets Nyssa and Frank who are also waiting in line to be processed . Frank screams at Allan about what happened to Yvonne . A Cyberman pushes him back in line . Mr Hartley continues to work on the generator , pushing it to the highest setting . The Doctor reaches the Committee . He tries to convince them to stop the processing . The Committee stutters in their response and the Doctor realises his plan is working . He tells Zheng to use the propulsion system now or all the people and the whole planet will die . Zheng agrees with the Doctor , he attempts to active the propulsion system but is attacked by the Committee . The Doctor continues arguing with the Committee . Nyssa , Frank and Doctorman Allan are placed on the conveyor belt . Suddenly , a swarm of Cybermats run past them . The Cyberman stops the processing and says to alert the Cyberplanner . The Committee explains that Mondas was pushed out of its orbit by a moon forming between it and it ' s twin planet , destroying the equilibrium . Their research showed that Earth thrived while Mondas dies . The Committee is having difficulty focusing as the wine is getting into their system . The Cybermats begin eating away at the generators . The Doctor tells Zheng that he must divert the power now or it will be too late . He tells the surface crews to activate the propulsion system . Mondas begins to move away from the nebula . The Doctor is sitting outside . Nyssa shows the Doctor calculations showing that Mondas is moving back towards Earth and away from the Nebula . The Doctor states that they Cybermen would have happened anyway , the nebula was just an excuse . The Doctor thinks the Cybermen can turn out for good , if they and the humans can live together . The Cybermen are already working on the roof and the city is warming up . Thomas Dodd , now a Cyberman , walks up to the Doctor telling him that he has been requested to supervise the reconstruction of the city . The Doctor refuses , saying he has to go . Mr Hartley tells the Doctor that Doctorman Allan will use his notes to try to reverse some of the processing and make the Cybermen a bit more " human " . The Doctor notes that at least Allan shut down the processing centres . The TARDIS quickly takes off . Doctorman Allan is talking to Sisterman Constant , who is now a Cyberman . She says that Constant hasn ' t looked at the Doctor ' s notes . Constant tells Allan that the logical course would be to increase processing . She tells Constant that they have a new future , thanks to the Doctor . The door slides open and Zheng walks in . Allan says she thought he was destroyed . Zheng says " Doctorman Allan , we begin again . "