Corruption ( audio story ) Corruption was the third story in the " I , Davros " series released by Big Finish Productions . Publisher ' s summary . " " Logically , the war ends with one form of life in utter control of the world . All other life forms gone . That is the goal — that is the only true victory ! " " Now established within the Scientific Elite , Davros and his team are pushing the boundaries of Kaled experimentation further and further forward . Access to Thal DNA spearheads an entirely new field of research for Davros , and as he becomes more and more intrigued by genetic mutations , others around him begin to fear him , his drive and his obsessive need for power . Meanwhile he must learn to cope with betrayal and political manoeuvrings that will leave him changed forever . . . Plot . " Davros continues his analysis of his own past , musing on his progress through the Kaled Science Elite , and his growing political skill , all in pursuit of power . " A squad of Thal paratroopers come under Kaled fire as their plane is destroyed . As they land and commence their mission , they know they will not return home . Meanwhile , Councillor Matross summons Davros to the Council of Twelve , which now includes his mother Calcula , to answer for the expenses of the Scientific Elite . As the meeting devolves into argument , they are attacked by the surviving Thal paratrooper , who shockingly reveals that she has come to kill , not the Supremo , but Davros ! He outwits her by ordering Calcula to reactivate the magnetic field of the assassin ’ s parachute ; the planet ’ s magnetic field is strong here , and crushes the assassin to the floor , killing her . Davros takes advantage of the situation to analyze the Thal female ’ s DNA . He finds it to be completely different from Kaled DNA , implying the two races have no common ancestor — they simply fill the same ecological niche , though with certain differences in internal organs . Davros notes that Thal men outnumber the women seven to one , but laments that the mass extinctions of other life forms in the war make it impossible to draw good comparisons . If any living creatures remain , they are in Drammakin Lake — now the Lake of Mutations — and the tunnels beneath the city . His associate Shan suggests capturing some samples in order to preserve as much of the genetic record as possible before it is too late . Davros disagrees , looking to the future instead of the past ; but at any rate , non - military research has been banned , and so Davros directs another associate , Ral , to develop a quick test for Thal DNA . Perhaps a biological plague weapon can be developed . As Ral leaves , Davros asks Shan to stay behind . Calcula meets with Section Leader Fenn of the Military Youth . Davros joins them , introducing Calcula to Shan , who was formerly in the Military Youth herself . Davros speaks highly of Shan , gaining Calcula ’ s notice . Calcula introduces Davros to Fenn , and says that she is planning a movement for the Youth ; Davros interprets this as seeking a power base . He excuses himself and leaves with Shan . Fenn misspeaks and angers Calcula , but gets back in her graces by agreeing to a job before he knows what it is — a kind of loyalty she approves . Davros jokes with Shan that , as Calcula is now technically her leader , she might be a spy ; but Shan reminds him that Youth membership is compulsory , and that things have gotten worse with Calcula ’ s involvement , with any questioning resulting in punishment and even death , even for the very young . Davros expresses some frustration with the private army of loyalists that Calcula seems to be constructing . They are distracted by the DNA analysis ; Shan assumes there is a fault , as the damaged DNA is changing — evolving , possibly ? It makes no sense , as evolution within an individual is unheard of . Nevertheless , Davros thinks they can shape their own genetic destiny ; Shan isn ’ t so sure , as they are killing Skaro , and have found no other life - supporting worlds . She mentions her own home in Darrien , which is now lifeless ; Davros counters even this , pointing out the mutated worms and monsters that survive there and elsewhere . He reminds her that she herself proposed a solution in a paper a year prior ; and now it ’ s time to make her dream reality . Fenn provides Calcula with Shan ’ s personnel file . He admits that he has known Shan for years , but doesn ’ t like her ; she is too clever . Calcula suspects that Davros is becoming romantically involved with Shan , and she wants to make the most of it ; hence , the file . Fenn leaves , and Davros arrives ; Calcula reads parts of the file to him . Shan ’ s family , while poor , is well - connected . Davros shows her blueprints for a radiation machine — not a weapon , but a variation on a cancer - curing device he invented . She dismisses the achievement . He inquires about her interest in Shan , and reacts badly at the suggestion that the Council may be interested in her . She changes the subject , and tells him that Councilor Matross has died in an accident , removing an obstacle to Davros ’ s work . . . and she hints that she may have had something to do with it . Davros makes up with Shan over his earlier , disparaging remarks about Darrien . The conversation turns to their work , and he excitedly reveals that his machine can definitely shape the direction of mutations . He suggests that they may engineer an organism that can survive any environmental changes on Skaro . It need not be attractive , but must be intelligent , and have strong survival instincts . At dinner , Calcula is pleased to see Davros reading a paper on obstetrics . She interprets his distraction as sulking over the obstacles from the Council , and reminds him that Matross is out of the picture . He is more determined than ever not to get politically entangled , but she suggests that he at least attend the unveiling of a new weapon he invented — and why not bring Shan along ? Shan joins Calcula in the War Room for the unveiling and the attendant military push . Shan ’ s father , in the military , is leading the campaign , but they are unable to speak to him from here . . . but perhaps he will survive and be able to speak afterward . They watch as the weapon , a massively overpowered beam generator , breaches the wall of a Thal command bunker ; as survivors pour out , they are slaughtered by the Kaled ground forces . To the Council , it is much like a sporting event ; Calcula complains that things of this nature aren ’ t shown to children more often . Another Councilor , Valron , is surprised by her reaction , and argues briefly with her . As the weapon ’ s power requirements burn it out after one shot , the Supremo asks Davros to build more of them . He asks Davros to stay as he addresses the people ; Calcula offers the disgusted Shan a ride home , but she refuses , and walks . As Shan tries to leave , Fenn accosts her , and refuses to leave her alone . Valron intervenes , and Fenn apologizes and departs . Valron is more sympathetic to her view on the carnage of the evening , and offers to walk her home . She accepts . Davros is starting to see the Council ’ s view on things — more efforts like this might win the war , and wipe out the Thals completely . He advises the Supremo to pursue such a genocidal course ; after all , logically , only one life form can triumph . The Supremo changes the subject and reveals that Thal spies are known to be in the city ; one such is Fenn , who will soon be arrested . Davros wants to warn Calcula , but communications are down ; he goes to do it in person . Calcula finds Fenn waiting for her at home . He tells her that Davros is waiting for her in his lab , and leads her there as she exults over the massacre . When she unlocks and enters the lab , Davros isn ’ t there ; Fenn immediately begins destroying Davros ’ s equipment . He says that the Supremo sent him to destroy Davros ’ s work in exchange for a promotion ; and that he is also to injure Calcula , ensuring that she will fade into obscurity . She declares him a spy , and tells him she will do anything to protect her son and his work . She switches on the radiation machine , and Fenn cries out in pain ; but she has already doomed them both with a high dose of radiation . As Fenn dies , she tells him that these actions will also bring down the Supremo , and put Davros on the throne , just as she always wanted . Before Fenn dies , they both begin to mutate . Davros arrives at the lab , finding Shan already there . Fenn is dead , and Calcula is dying ; but Davros only has eyes for the mutations they have experienced , and how it proves his theories . His clinical reaction to his mother ’ s impending death shocks Shan ; she asks him to reverse the process , but he says that he cannot . Calcula tells him that their enemies killed her because they fear Davros , and that he must ascend and destroy their enemies . She expresses her pride in him , and then dies . He sends Shan away and tells her he is not to be disturbed while he works . Shan finds Valron and tells him Calcula is dead . She also realises , and explains , that Fenn ’ s mutations matched Calcula ’ s , implying that he was not a Thal , but a Kaled . She and Valron deduce that he was not a spy , but that his questionable actions were under orders from someone very senior , more so than Calcula herself , and possibly a Councilor . Valron dismisses her concern that Davros might be next , and tells her to leave Davros to his grief — though she is sure he isn ’ t grieving . A pregnant woman named Renna finds that her regular doctor has been replaced by Davros , whom she does not know . He accidentally reveals that she is having a boy , but covers by telling her that she will be offered an injection of a new drug to counter certain negative environmental factors . She agrees . Shan realises that Valron is taken with her , and he admits his attraction to her . Shan thinks word of Calcula ’ s death is being suppressed . Valron worries that the Military Youth may be turned on any Council member who is implicated . Shan suggests making peace with the Thals ; the idea is illegal , and Valron is shocked , causing her to backpedal a bit . However , she insists that Davros , at least , should know the truth of who killed his mother . Shan joins Davros at the hospital , and is surprised to find him working the maternity ward . They argue over their respective emotional involvements in the circumstances . Meanwhile an expectant mother unexpectedly dies of complications , the fourth such death today . He rushes to incubate the baby , but it latches on to Shan and tries to hurt her . He gets it into the incubator , and Shan inquires about their chances of survival , but he does not know . He reveals that each new baby , on which he has experimented , is genetically identical to his post - mutative mother — a new species ! Shan tells him that the Supremo ordered Calcula ’ s death , possibly in league with the Council . Davros acknowledges it , but doesn ’ t care ; Calcula lives on in the new species . He believes no revenge is necessary , as the murderers ’ deaths are inevitable — only his new species will ultimately survive . Shan asks what he has taken out of them , and he says he has only removed that which affects their ability to think rationally . She thinks this is horrible , prompting him to disdain her . Shan returns to Valron and reports Davros ’ s words . Meanwhile the Military Youth begin to riot , word of Calcula ’ s death having gotten out . Davros meets with the Supremo , who asks about an anti - radiation drug that was in development ; it has been completed and distributed . Davros confronts the Supremo about Calcula ’ s murder , which the Supremo denies ordering . Davros declines to use his influence with Calcula ’ s followers to stop the riots , as it was a Kaled , not a Thal , that killed her . The Supremo suggests that the attack was to restrain Calcula , not kill her ; but clearly it has backfired . The Supremo agrees to give Davros whatever he wants . Davros turns down a Council position . Instead , he wants complete autonomy and unlimited resources for his science division , starting with new labs underground . He backs up his demand by threatening to prove who killed Calcula , ensuring death for the killer . He suggests that it is more advantageous to leave the Supremo in power , and suggests naming Valron as the murderer in order to stop the riots . To that end , he provides a faked file of documents proving Valron ’ s guilt . Davros tells Shan that Valron has pro - Thal views , but she doesn ’ t believe it . He is angered to learn that she has been discussing their work with Valron , and orders her to end her relationship with the Councilor . Shan argues for pursuing peace with the Thals . The Supremo , having been eavesdropping , enters , and has her taken away to be hung . Later , he makes an announcement that the traitors have been unceremoniously hung ; Shan ’ s father was killed in battle hours earlier , before he could hear of her fate . Davros watches this in bemusement ; but he is interrupted by a call from Ral about an incoming Thal warhead . The lab is twelve stories below ground , and Davros is sure he ’ ll be fine — but an explosion occurs , and he blacks out . Over the next month , Davros lingers near death , and sees his life flash before his eyes , with visions of his mother urging him to live — even at the sacrifice of his flesh . Kaled medical technology saves Davros ’ s life — in fact , it can make him outlive his compatriots , surviving to the end of his natural lifespan , as no one has done in ten generations . And yet , with his terrible condition , do the doctors have the right to inflict this life on him ? As he awakens , he learns that the Council and Scientific Elite have decided that if he will die , it will be by his choice . Ral provides him with a poison injector with which he can end his pained existence if he chooses . The Supremo thinks it is over . . . However , Davros chooses to live . A week later , he emerges , and meets with Ral ; he rejects any thought of weakness and recovery . He lives by machines now , in a life support vehicle . He will improve on the designs , but in the meantime , he feels a great clarity , with the world no longer filtered by his flesh . He feels no more affinity for the Kaleds , but also feels no fear — and he has a destiny to fulfill .