The Wheel in Space ( TV story ) The Wheel in Space was the seventh and final story of season 5 . It introduced new companion Zoe Heriot , played by Wendy Padbury , and featured the first use of the Doctor ' s " John Smith " alias . Currently , only episodes three and six exist in the BBC Archives . Synopsis . The TARDIS materialises on board a spaceship , the " Silver Carrier " , where the Second Doctor and Jamie are attacked by a servo robot . Jamie contacts a nearby space station known as the Wheel and they are rescued . Meanwhile , the " Silver Carrier " discharges Cybermat s , which also travel to and enter the station . These pave the way for the invasion of the station by Cybermen , who intend to use its direct radio link with Earth as a beacon for their invasion fleet . The Doctor sends Jamie and a young woman named Zoe Heriot over to the " Silver Carrier " to fetch the TARDIS ' vector generator rod . Meanwhile , he frees the Wheel ' s crew from the Cybermen ' s hypnotic control and to destroy all the Cybermen on the station . When Jamie and Zoe return , the Doctor installs the rod in the station ' s X - ray laser , making it powerful enough to destroy the Cyber - fleet . An approaching force of space - walking Cybermen is also vanquished . Plot . Episode 1 . The TARDIS is landing , but the scanners show nothing . The Doctor ' s readings show that air and temperature is OK but they are surrounded by metal . The scanner begins to work . Jamie is delighted to see a lake , which soon turns into a scene with birds then into a waterfall and then a beach . Jamie is confused , but the Doctor explains that this is the TARDIS ' defence mechanism and that there is danger . Before they can take off again , there is a power overload which triggers a mercury vapour in the console room . The Doctor and Jamie have to leave . The Doctor opens a panel near the TARDIS door and removes a rod . The TARDIS begins to shake and tremble . They leave . The Doctor explains he has disengaged the Time Vector Generator — the TARDIS is no longer bigger on the inside . They begin to search their surroundings . They appear to be on a stationary rocket . The Doctor feels in his pocket and offers Jamie a sherbet lemon . He ruminates over what the danger could be . He notices on the floor a trail of oil . Jamie absent - mindedly presses a button . A door opens . The Doctor and Jamie see a trail leading to another door at the end of the corridor . They carefully make their way down the corridors , observing the compact equipment to their sides . The Doctor listens at the door at the corridors end . It all seems safe — but what is the danger ? Where is the crew ? What has produced this track ? The Doctor presses buttons on a console as Jamie wanders off . They wander back down the corridor checking hatchway doors to the side . They enter the living quarters and close the door . Jamie finds some water — not satiated by the sherbet lemon . A servo robot in the control room begins to move . It opens and then closes the main door . The Doctor looks out a window and sees that the ship is drifting in space . They cannot leave until they find some mercury for the TARDIS . They look but to no avail . They plan to check the control room , but Jamie moans about being hungry . They move back down the corridor . In the living quarters , the Doctor presses some buttons on a machine which produces a large uniform square . Jamie turns his nose up . They move towards a small table and some chairs . Jamie is delighted to find his square tastes just like what he craved the most — roast beef . They talk about Victoria — Jamie hopes she ' s safe , and the Doctor reassures him she picked a good time to settle in . Jamie decides to sleep . He moves towards the crew ' s bed , removes his jacket and lays on the bottom one . The robot opens the door and moves down the corridor . The Doctor observes that there is no dangers in the space that they are in . The robot observes the TARDIS , wheels around back into the corridor and closes and seals the door closed . The Doctor listens at the door and then presses a button to open it . He moves up the corridor and notices an extra track on the floor . He presses the closed circuit screen but just gets static . He turns away perplexed . The robot , back in the control room , operates the console . The rocket moves with a jolt , throwing the Doctor to the wall . Jamie starts and runs into the corridor . The Doctor has hit his head and needs to get back to the TARDIS . They move to the door and attempt to open it but discover it sealed . Jamie helps the Doctor back into the crew quarters and onto a bunk bed . The Doctor implores him to lock the door before passing out . The robot summons a container with bright orbs in it . They float off down the corridor . Jamie observes a " great big silver thing " in space . Unseen by Jamie , the Doctor has left his bunk and is struggling down the corridor . He wants to get to the TARDIS . He uses the time vector generator to try to unseal the door . The Doctor places the time vector generator in his pocket and tries the buttons on the door . Sensing movement behind him , he turns slowly to see the robot . Jamie notices the Doctor is missing , grabs a blanket and runs into the corridor . He throws a blanket over the robot . They hurry back to the crew quarters and close the door . The robot frees himself . The Doctor gives Jamie the time vector generator and tells him it can be used as a gun . The robot is outside burning through the door . Jamie uses the time vector generator and blows the robot up . The Doctor has passed out . At a nearby Earth space station , the unusual behaviour of the rocket is being observed . The rocket is a supply ship that went missing nine months ago and is 80 or 90 million miles off course . They try to contact the ship but to no avail . Jarvis , the leader of the station , states that the ship is a danger to them . The orbs released by the robot are floating in space . The space station pick up the signals from the orbs . Unbeknownst to them the orbs are being absorbed by the ships . Jarvis has made his mind up . He is to use the X - ray laser on the ship and blow it up . An unknowing Doctor awakes . Episode 2 . Space Control try to communicate with the rocket one last time . The laser is logged on . Communications Officer Leo Ryan crosses the room to talk to astronomer Tanya Lernov . Leo is all for destroying the rocket , but Tanya is unsure . On the rocket , Jamie sees a light panel and prises it away from the wall . He pulls the light out , removes the wires and the lights go out . In the gloom , he sees the bright tip of the time vortex generator and takes it . Dr Gemma Corwyn , second - in - command of the space station , pleads to Jarvis to not destroy the ship . Jarvis stands firm . Gemma says that if the ship is on autopilot then it shouldn ' t have strayed so far from its course . Jarvis is staunch . Jamie points the Time Vector Generator at the Wheel Space Station and turns it on . The crew in the Wheel quickly snatch off their headsets and throw them to the desk . Leo helps a crewman who has collapsed over their desk into a bench . Gemma and Jarvis are still arguing when Tanya bursts in and informs them of the crew . Jarvis orders the sound to be traced . Casually and Vallance , mmbers of crew , help the fallen Rudkin to his feet and escort him out of the room to the medical bay . Jarvis orders the rocket knocked out when Tanya informs him that the signal is coming from the rocket . Jarvis sends some crew over to investigate . Jamie looks with concern at the still prone Doctor , then looks to the porthole . He sees two men in space - suits approaching . They tap on thee porthole , and Jamie points towards an airlock . As they move off , Jamie rushes from the living quarters . As soon as the men have docked in the rocket , Jamie rushes in and informs them of the injured Doctor . Later Leo and Tanya are talking . The Doctor and Jamie have been brought over to the Wheel . Leo is informed that there is a magnetic effect being registered on the hull of the Wheel . Tanya puts this together with the slight air pressure anomalies and begins to suspect they are linked to the rocket . Unbeknownst to the crew , the Wheel is absorbing more and more orbs . Gemma checks Jamie . Jamie is fine , but the Doctor has concussion and a suspected fracture . Gemma takes down details from Jamie . Jamie gives his own name but doesn ' t know how to identify the Doctor . Jamie notices a name on some medical equipment and states that the Doctor is called John Smith . Gemma notices the same equipment and looks at Jamie with suspicion . Gemma asks Jamie how they ended up where they are . Jamie stalls for time . Gemma fetches some water . Jamie states that he became ill and was quarantined to his cabin . When he got better , only the Doctor was still alive and he hasn ' t told him what happened . Gemma seems content . Jamie rises to leave . Gemma organises a tour of the Wheel and suggests Jamie should hunt out Zoe in the library . As Jamie leaves , Gemma goes to her desk and presses a switch on an intercom . She contacts Zoe and orders her to observe Jamie closely . Zoe vanishes from the screen but soon reappears . She pressed the wrong button . Jamie approaches the library . As he enters , Zoe is recording some astronomical data verbally into the library . Zoe turns off the recorder . She begins to laugh at the way Jamie is dressed before placing his kilt in a historical context . She begins to show Jamie around the base and is soon accompanied by Leo . He points out some flowers from Venus that belong to a man called Bill Duggan as well as the motor that controls the X - ray laser . Zoe questions Jamie about the Doctor , but he evades the question . Jarvis is eager for information regarding the Doctor too . He is worried about the morale of his crew and the break from routine . Gemma reports that she thinks Jamie has been lying ; his blood doesn ' t seem to report that he has been ill or in space for very long . She also found the fact he turned down water as suspicious as this is something he would have lacked on the rocket . Gemma ponders over what the Doctor and Jamie could actually be . She wonders if they might be saboteurs . Jarvis seizes on this piece of information . In his mind they must be saboteurs and they probably murdered the original crew . Jarvis rises and rushes out . Zoe shows Jamie into the Operations and Communications room . He asks her what the Wheel is . She explains it is a multi - purpose construction but functions as a relay station for Earth , a halfway house for deep space ships , a space research station and a stellar early warning station . They stumble into a conversation whereby they discover that Jarvis ' orders to destroy the ship are going to go ahead . While the crew are busy , Jamie manages to slip away . Jamie looks round the power room and notices Bill Duggan ' s space flora . Seemingly dissatisfied with the flora he again looks round the room . In the Operations and Communication room , Jarvis has noticed the disappearance of Jamie . He questions Zoe and finds out they were last in the power room . Jarvis leaves the room after having a hushed conversation with Duggan . Duggan leaves the room shortly after . Nobody is really sure as to what is going on , but Tanya sniffs a sense of intrigue and is still suspicious of the rocket . Back in the rocket more orbs have formed . An alarm sounds , and the orbs start to flow . A figure forms inside them . A hand breaks through the protection of the orb . The hand is that of a Cyberman . . . Episode 3 . The Wheel is preparing to destroy the rocket . Jamie , looking around the Power House , finds a receptacle marked " quick - set plastic " . He opens up the mechanism to the X - ray laser and sprays the plastic in . As he does so , Jarvis and Bill discover him . Jarvis calls for all security to come to the Power House . As Leo goes to see what is going on , he warns Tanya that Zoe has predicted that a star in a nearby system is going to explode and that she should watch out for it . The Cybermen in the rocket have now fully hatched . They communicate to some higher being that Phase 1 and 2 ( their hatching and undetection ) is complete and that they are to begin Phase 3 . As more security rush to the Power House , Zoe warns Gemma that the implosion of the star could trigger a meteor shower . After inspecting the X - ray laser , Bill tells Jarvis that it will be out of action for at least a week . Jamie says he is not a saboteur . Gemma enters and says that Zoe ' s prediction of a meteor shower will be dangerous without X - ray protection . All of them go to the Operations Room apart from Bill who begins the process of salvaging the machinery . As he does he comes across a Cybermat . He does not know what it is and squirrels it away . In the Operations Room , Jamie refuses to be labelled as a saboteur . When asked why he did it he states that the Doctor told him to do it . Later , when brought to him , the Doctor berates Jamie for getting him in trouble . The Doctor barely remembers anything that happened on the rocket . The Cybermen tell their controller that Phase 3 is to begin . In the Operations Room , Leo has done some sums and confirms Zoe ' s hypothesis . He gets cross at her as she is being purely logical and not thinking of the long term issues . Bill and his team of engineers strip the X - ray machine . Once left alone , he sees the Cybermat again and is horrified to see that it has corroded the ship ' s store of bernalium — the fuel for the X - ray laser . As he is freaking out about this , the Cybermat disappears . Gemma checks out the Doctor and finds him physically fine . She asks the Doctor why he ordered Jamie to protect the rocket . Zoe interrupts . She asks the Doctor how he piloted the ship . She has figured out that there is no way that the rocket could have drifted so far in such a short period of time and therefore must have been piloted . She has also realised that such a lengthily journey would have meant that the ship would have needed refuelling . She has inferred that the Doctor was in charge of all this . The Doctor argues against her logic but cannot give a better answer . The Cybermen contact their controller and say that Phase 4 can now begin . They operate the ship ' s controls . On the Wheel the Cybermats begin to glow . Bill has informed Gemma of the situation with the Cybermats and the bernalium . Gemma wants to see the creatures . Another crew member , Kemel Rudkin , stumbles over a number of Cybermats . He tries to hit one of them with a metal bar , but he is shocked by it . He is soon surrounded . Before he is killed , he manages to spray one with the quick - set plastic . A scream rings out across the Wheel . Jamie wants to go to see what it is , but the guard will not let him out . Gemma and Bill discover the crew member dead . They see the solidified blob of quick - set plastic . Zoe has had the quick - set plastic brought to the Doctor for investigation . The Doctor suspects that the depletion of bernalium and the death of the crew member are related . Jamie talks about the saboteurs that Jarvis is so concerned about . The Doctor decides to use the X - ray machine to see inside the quick - set plastic . Jarvis has been informed of the situation and is furious with Bill , saying he will send him back to Earth . Leo is to take over Bill ' s duties whilst Tanya replaces Leo . Once Jarvis has left , Bill pleads to Tanya and Leo that his version of events is true . Jarvis is furious about the whole situation . Gemma runs through all the anomalies of the last few days and suggests they are all related , blaming the rocket . The Doctor and Jamie identify the Cybermat . The Doctor infers that that must mean that Cybermen are on the rocket . Bennett orders two men , Vallance and Laleham , to look the rocket over . Laleham and Vallance make their way to the rocket , board and open the air lock . They are beset by Cybermen , who fire a beam from their heads which controls them . They are ordered to take the Cybermen aboard the Wheel . . . Episode 4 . The Doctor is trying to explain to Jarvis the danger that the Wheel is under . Jarvis disbelieves the Doctor ' s story . The Cybermen order Laleham and Vallance to take them to the Wheel and aid them once there . The Cybermen get into a crate with a false bottom , and Laleham and Vallance pile the crates of bernalium on top of them . Jarvis vows that if the Doctor ' s story is true , the Cybermen will never be able to get into the Wheel undetected . Gemma sides with the Doctor , but Jarvis argues and storms out . Gemma wants Bill to see the X - ray . Zoe leaves to fetch him . Gemma agrees with Jarvis that surely the Cybermen won ' t be able to infiltrate the Wheel unnoticed . The Doctor states they will find a way . Out in space , Laleham and Vallance bring the crate over . Laleham and Vallance tell Leo of the bernalium . Tanya checks with Jarvis , who is delighted . Leo waves them in . Bill confirms that the X - ray is the Cybermat he saw in the Power House . Zoe absents herself to do some more calculations regarding the meteors . The Doctor speculates that the Cybermats might have been sent over to weaken the Wheel ' s defences but suspects there is more to it than that . As Laleham and Vallance enter , Chang closes the door . Chang depressurises the hold . Laleham and Vallance wave at Chang and then remove their helmets . Zoe is calculating flight of the meteors . Jamie interrupts her recording . Zoe plays back the recording , which amazes Jamie . Zoe walks out into the corridor , closely followed by Jamie . Zoe asks Jamie why he destroyed the laser . He becomes evasive . Leo is attempting to fix the laser . Leo takes a screwdriver and twists it . Jarvis and Bill enter . Jarvis offers Bill to help . This allows the crewmen to leave . Chang enters , which allows Leo to leave too . Chang and Bill begin to work together . Gemma and the Doctor talk about Jarvis . The Doctor wonders about Jarvis ' state of mind and how he seems to block out anything that doesn ' t adhere to his sense of logic . Gemma agrees . Jarvis checks on the state of the ship with Tanya . She begins to raise a problem , but Jarvis ignores her saying everything is fine . Later , the Doctor is trying to get up . Jamie enters and Gemma tries to get Jamie to convince him to go back to bed to no avail . The Doctor is beginning to panic about the Cybermen and wants to take action . Gemma states there is nothing that the Doctor can do as he is confined to his room . Jarvis enters and states that the Doctor is now free to walk the ship as everything is fine now and he can be trusted . Gemma raises some issues , but Jarvis says that that can ' t be true because everything is fine before leaving to go to sleep . Gemma is left confused . Chang tells Bill about the bernalium . Bill is excited and sends Chang to get it . Once in the hold , Chang is cornered by a Cyberman . Chang throws a crate of bernalium at him and is killed by a ray from the Cyberman ' s chest . Laleham and Vallance passively watch over this . The Cyberman dumps the body in the incinerator . Laleham and Vallance begin to take the bernalium to Bill . In the Operations Room , Tanya wonders why the incinerator has been activated . Leo tells her to log it as another anomaly . Laleham and Vallance bring the crates of bernalium to Bill . They say that Chang hurt his hand and has gone to the medical bay . Laleham and Vallance open a box of rods and take some to Bill . They insist the laser must be fixed . Bill moves to the capacitator bank and inserts a rod . He ' s pleased they work . Laleham and Vallance ask when the laser will be fixed . Bill says within six or seven hours . Bill spins round and is met by a beam from a Cyberman ' s head . The Cybermen are now going to fix the laser whilst Bill is to go to the Operations Room . Zoe comes to Gemma in distress . She has found a critical anomaly in the calculations regarding the meteors , but when she reported it to Jarvis he ordered her to forget it . This confirms Gemma ' s fears . Zoe complains about not having the capacity to feel emotion , but Gemma states that ' s just the way she was trained . Tanya shows the Doctor around the Operations Room . Whilst Tanya and Leo are distracted , Jamie reminds the Doctor that they still need mercury for the TARDIS . Zoe informs the Doctor about the meteors and Jarvis as well as the new haul of bernalium brought over from the rocket . The Doctor becomes convinced that Cybermen will have come over in this crate and reports it to Gemma . The Doctor explains that the Cybermen have the ability to control minds . Gemma states that all crew members on the Wheel take drugs to ward off mind control . The Doctor argues that the Cybermen ' s powers are far more potent than that . Gemma informs the Doctor that all crew are planted with a device called a Solanski Circuit which allows the , to judge if they are being controlled . As they check this , Bill quietly enters . Jamie queries this with Zoe , thinking he is still confined to his room . Bill moves to the radio complex and stands still . The Solanski Circuit shows mind control in the room . The Doctor pinpoints Bill . Before anyone can get to him , Bill commits suicide through electrocution . The Doctor takes charge , stating that there can now be no doubt that the Cybermen are here . He orders Gemma to put the whole of the Wheel on red alert and sets Leo off to create a crude plate and transceiver system that will block off the Cybermen ' s controls . The Doctor and Jamie set off to find the Cybermen . Zoe approaches Leo and Tanya , who are assembling components , and offers them help . They reject her . The Doctor and Jamie sneak into the air lock to investigate . While they are busying themselves , a Cyberman slowly makes his way down the stairs . . . Episode 5 . The Doctor and Jamie hide behind a case and peer over it . The Cyberman picks up a crate and walks upstairs with it . They emerge from hiding . The Doctor points out that , if it was the Cybermen ' s intention to destroy the Wheel , they could have done it ten times over by now . They must have some other plan . The Doctor decides that the first thing they should do is protect the Wheel ' s air supply . The Doctor contacts the Operations Room and tells them to seal the airlock doors . Gemma agrees and sends Leo to do it . Leo moves away . Tanya asks Gemma if she trusts the Doctor — she has to admit she does despite not being sure why . As they are in contact , Jamie sees something move in the corner of the room . It is a pair of Cybermats . The Doctor orders Tanya to set up a specific audio frequency . The Cybermats are closing in on the Doctor and Jamie . Enrico produces the frequency . It forces the Doctor and Jamie to hold their ears but makes the Cybermats lose control . One spins round and round until it begins to smoke , whilst the other runs into a wall and explodes . Enrico stops the noise . The Doctor shows the defunct Cybermats as proof of danger . Meanwhile , in the Power House on the Wheel the Cybermen are setting up base . Tanya reports a power surge from the Power House . Leo decides to check this new anomaly . The Cybermen contact their controller and tell it about the destruction of the Cybermats . The controller orders the Wheel to be taken over . Tanya orders Enrico to monitor the meteors . Enrico is very fatalistic about their chances of survival . Gemma shows Jarvis the Cybermat — he refuses to acknowledge their existence . Gemma crosses the room to talk to the Doctor . There is nothing more she can do for Jarvis . The Doctor suggests his functions may return . Until then , the Doctor says , she should take control of the ship . She tells the Doctor that she has put a magnetic force field around the Operations Room , but other than that she doesn ' t know how to protect them from the machines . In another part of the Operations Room , Zoe confides to Jamie that she feels her sense of logic does not help her in situations like this . Jamie tries to cheer her up — but to no avail . Leo tries to contact the Power House . Unbeknownst to him within the room they are all dead . Flannigan , an Irish engineer , enters the Power House and speaks to Laleham and Vallance . When he goes to answer Leo ' s call , Vallance pulls out a laser pistol and aims it at Flannigan . Flannigan knocks the pistol from Vallance ' s hand , but Laleham grabs him from behind . A fight breaks out , and eventually Flannigan is subdued . Vallance grabs the pistol and aims it at Flannigan , who manages to spin Laleham in the way of the beam . A Cyberman enters and uses his head beam on Flannigan , rendering him under his command . The Cyberman wants to know how the force field is operated . He is told it can only be operated from inside the Operations Room . The Cyberman orders Laleham ' s body to be disposed of . The Cyberman turns and leaves as Flannigan and Vallance pick up Laleham ' s body . Back in the Operations Room , Zoe tries to nurse Jarvis , but he is rejecting it . Tanya tells her to leave him alone . The Doctor asks Gemma if everyone on board has the mind control blocking equipment yet . She says not everyone . They are distracted from shouting elsewhere . They rush to Leo and Enrico . The meteor shower is approaching and bigger than expected . It is less than a million miles away . The Power House contacts the Operations Room . It is Flannigan — he says that the laser is fixed . When asks why they haven ' t been answering their calls , Flannigan says there must be a fault in the line . They decide to test the laser . Leo begins to panic as the meteors are getting closer . They test the laser with a random shot . It works . The Doctor speculates that the Cybermen must have caused this meteor shower not to destroy the Wheel but to make them need to use their laser , forcing them to go to the rocket to get the bernalium that the Cybermats corroded and allowing the Cybermen a way onto the Wheel . When asked why , the Doctor states that the Cybermen are obsessed with conquering Earth and they must see the Wheel as integral for their new plot . The Doctor wants to know what Jamie did with the Time Vector Generator . Jamie informs him he put it back in the Doctor ' s pocket on the rocket . He pats his pockets . It ' s not there . The Time Vector Generator is integral to his plans and somebody has to go back and get it . Jamie is forced into going . The Cybermen tell the controller of the magnetic force field . The controller tells them to initiate plan 3 . The Cyberman calls over Vallance . Gemma , Jamie and Zoe leave the Operations Room . Zoe moves off . Jamie protests at taking Zoe with him to the rocket , but Gemma insists . Back in the Operations Room , Leo shouts at the Doctor for jeopardising the lives of the crew . The Doctor tries to defend himself but gets a bit flustered . Leo takes control . Gemma , Zoe and Jamie find the body of Laleham . This slightly unnerves them , but Jamie and Zoe make their way into the air lock . Before he goes in , Jamie gives Gemma his laser pistol . Gemma contacts the Doctor in the Operations Room to say all is clear . Larger meteors are coming in now . Gemma hears a noise and hides behind a machine . A Cyberman and Vallance enter the room . The Cyberman orders Vallance to turn the oxygen into pure ozone , killing everyone on board . In the Operations Room , Enrico is panicking about the meteors . Gemma contacts the Doctor to tell him about the air . A Cyberman emerges behind Gemma and moves towards her . The Doctor cries out for her to run . She fires the laser pistol , but it has no effect so she backs towards the door . The Cyberman fires at her using his chest beam causing her to fall down dead . Outside Jamie and Zoe see the meteors heading their way . Episode 6 . Leo sets about destroying the meteors . He keeps destroying despite the crew ' s warning he may be endangering Zoe and Jamie . Outside Zoe and Jamie are separated by space debris . All meteors are gone . Enrico cannot find any trace of Jamie and Zoe on the radar . Leo berates the Doctor for the danger he put Jamie and Zoe in . The Doctor states it was worth the risk to get back the Time Vector Generator . The Doctor warns Leo that he should switch to the emergency air supply as Gemma warned . Leo wants to check with Gemma , and the Doctor breaks the news that Gemma is dead . Leo checks on the cameras and sees her prostrate body . They are soon distracted by more meteors approaching . As they fend them off , Jarvis slips away . As soon as they have dealt with the meteors , they realise that Jarvis is gone . They search for him on the cameras . They soon find him , and he tells them he has gone out to find the Cybermen . As he is talking , a Cyberman approaches . The two approach each other . They grapple , and Jarvis is lifted above the Cyberman ' s head , thrown to the ground and killed using the Cyberman ' s chest beam . Tanya pleads for the communications to be severed so she does not have to see anymore . Zoe and Jamie have been reunited on the rocket . They set about looking for the Time Vector Generator . A Cyberman orders Vallance to begin poisoning the air . Vallance reports back that they have already switched to the emergency air supply . The Cyberman contacts his controller , who processes this data . He computes that someone on the ship must know of their ways . The controller orders the Cyberman to check everyone ' s identity on board . On the rocket , Zoe discovers the work station that the Cybermen set up . From there they can see the communication between the Cybermen and the controller . Vallance is given a blast from the Cyberman ' s head beam and asked to picture and identify everyone on board . He goes through everyone until he gets to the Doctor , whom he cannot name . Leo , Enrico , Tanya and the Doctor are discussing why the Cybermen are here when they see something else on the radar . The Doctor identifies it as a Cyberman ship . Leo encourages Enrico to contact Earth , but Enrico states that Bill damaged all communications when he killed himself . Leo asks if it can be fixed , but Enrico states that all spare parts are kept in the Power House . Leo states that they must go and get them despite the danger . The controller verifies the Doctor as their enemy and orders his destruction . He is to be lured out of the force field and destroyed . All of this has been overseen by Zoe and Jamie , who hurry back to the Wheel to warn the Doctor . Tanya , Leo and the Doctor examine the blueprints of the Wheel to figure out how to reach the Power House . Flannigan contacts the Operations Room to explain he has a number of Cybermen captive in a workshop . Leo tells him to keep them sealed up whilst they get the spare parts . The Doctor insists that he will go , and it is arranged that Flannigan is to meet the Doctor in corridor 6 . Once communication has been broken off , the Doctor states that he is suspicious of Flannigan . He states that Flannigan will turn up in the Operations Room and that he will need to have a plate put on his head immediately . He rushes off . Flannigan meets a Cyberman and tells him of his plan to meet the Doctor . The Cyberman orders Flannigan to destroy the force field by entering the operations a Room and destroying from the inside . The Doctor has made his way to the Power House through the air tunnels . Once there he pockets some mercury for his TARDIS , checks outside and begins to examine some machinery . Jamie and Zoe return to find Gemma dead . They soon bump into Flannigan , who says he will accompany them to the Operations Room . The Cyberman and Vallance wait for the Doctor in corridor 6 but to no avail . Vallance wonders if the Doctor used the air tunnels . The Cyberman orders to be shown . Flannigan enters the Operations Room with Zoe and Jamie and is soon jumped on by Leo . He has a blocker plate installed and is soon groggy but back to his normal self . Jamie tells Leo of the Cybermen ' s trap for the Doctor , and Leo says he has already gone . The Doctor contacts them — he wants Jamie to come to the Power House and give him the Time Vector Generator . He signs off abruptly , stating that he has company . The Doctor slowly turns to see two Cybermen behind him . The Doctor questions why they got Bill to destroy the communications when it was that that they needed . The Doctor has deduce d that the Cybermen fleet need a radio beam to focus in in to navigate to Earth . The Cybermen confide that Bill was only supposed to destroy incoming communication . The Doctor invites the Cybermen in and then switches a machine on that he has rigged up . The Cyberman that has been caught up in the machine is deactivated whilst the one behind him cannot use his chest beam on him as the machine creates a force field . The Cyberman leaves to get reinforcements . Flannigan and Jamie emerge through the tunnels . The Doctor takes the Time Vector Generator from Jamie and says that he plans to incorporate it to the X - ray laser to boost its power and destroy the Cybermen fleet . Flannigan arms himself with quick - set plastic , and he and Jamie go off to seek more Cybermen . In the Operations Room , Leo sees that the Cyberman fleet is drawing closer . The Doctor orders the laser to be pointed at the fleet and for Leo to wait for his orders . Jamie and Flannigan make their way to the loading bay . On meeting a Cyberman and Vallance , Flannigan pretends to still be under Cybermen control . Leo urges the Doctor to hurry . Outside in space , the fleet is a large spaceship but also swarms of Cybermen marching through space . Jamie and Flannigan seize their moment and put the protective plate on Vallance ' s head whilst Flannigan sprays the Cyberman with the quick - set plastic . The Cyberman is deactivated , but not before he can open the loading bay doors to reveal a stream of Cybermen ready to enter . Flannigan closes the doors but it is too late , the first Cyberman is holding the doors open . The Doctor confirms with Leo that he is ready . Leo flicks the switch , and the Cyberman ship is destroyed . In the loading bay , the surviving Cybermen are repelled by Flannigan turning on the neutron force field , which sucks them out to space . Later Leo has taken control of the ship , and he is contacting Earth to explain what has happened . Things have got even better for him as he is now with Tanya . On the rocket , Jamie is explaining to Zoe , who has escorted them , the very basics of the TARDIS . Zoe is upset that she is not being invited to join them . The Doctor is refilling the TARDIS with mercury when Jamie joins him . They are about to set off when the Doctor sees a chest close behind Jamie . He finds Zoe inside . Jamie is dead against Zoe joining , but the Doctor is more open - minded . He decides to test her . He puts an apparatus on his ends that reads his thoughts and projects them on the screen . He tests her by thinking of the most horrific foe he has faced — the Dalek s . As Zoe watches , her face fills with horror .