The Genocide Machine ( audio story ) The Genocide Machine was the seventh story in Big Finish ' s monthly Doctor Who range . It was the first serial in the " Dalek Empire " arc , which continued in the Sixth Doctor audio " The Apocalypse Element " and the Fifth Doctor audio " The Mutant Phase " before concluding in the Eighth Doctor audio " The Time of the Daleks " . The story introduced the character of Bev Tarrant who would go on to be a main character in the " Bernice Summerfield " audio range . Behind the scenes , this story was notable , not just as the first Big Finish production to feature the Dalek s , but as Nicholas Briggs ' first time voicing them in an official " Doctor Who " production . He previously voiced the Daleks for the Audio Visuals in the 1980s . Briggs later went on to voice the Daleks throughout the BBC Wales series of " Doctor Who " , as Russell T Davies was a Big Finish subscriber and discovered him that way . Another first behind the scenes was the first use of Pro Tools to edit a Big Finish story , namely by Nick Briggs , who provided the post - production and music / sound design for " The Genocide Machine " . The small 8 - track device he previously used to edit Big Finish broke down mid - production , and he was forced to upgrade . Publisher ' s summary . The library on Kar - Charrat is one of the wonders of the Universe . It is also hidden from all but a few select species . The Doctor and Ace discover that the librarians have found a new way of storing data — a wetworks facility — but the machine has attracted unwanted attention , and the Doctor soon finds himself pitted against his oldest and deadliest enemies — the Dalek s ! Plot . While doing some sorting in the TARDIS library , Ace finds some books from the library at Kar - Charrat , which is widely regarded as one of the wonders of the universe , and is said to hold all the knowledge of every civilised world . It ’ s a fanciful claim , but the Doctor takes it seriously enough ; and he determines to return the books and own up to having unintentionally removed them — it ’ s not a lending library , after all . Meanwhile , on Kar - Charrat an expedition of four individuals led by Bev Tarrant is exploring a ziggurat of more than a thousand years in age , hidden in the rain forest and the perpetual rain . The expedition — actually a mission of theft , aiming to steal the entire ziggurat — is cut down by mysterious assailant . As Bev , the only survivor , crawls away , odd voices note that her now - dead partner Rappell no longer needs his body — but someone else does . The Doctor and Ace arrive , but the library appears to be in ruins . The Doctor explains that this is Time Lord technology at work ; he was here with others at the time of construction . The Time Lords created not only a defensive grid , but also a time barrier that projects an impenetrable illusion of the way the library will look more than three thousand years in the future . Only one who is time - sensitive — like the Time Lords — or specially identified in the system can pass through it . He brings Ace through , and introduces her to the head librarian , Elgin , and his assistant Cataloguer , Prink . The return of the books prompts a momentary scandal ; but Elgin relents , and shows them around . The library has a new achievement . It now contains a “ wetworks ” , a huge array of water tanks that use the fluids as a complex form of memory storage . In this way , they have vastly increased their information capacity . The information can be retrieved via direct download to the brain . Elgin mentions that no one has access to the library — it is for storing information , not sharing it . This frustrates Ace , and she leaves to return to the TARDIS . Elgin tells the Doctor that the non - sharing policy has prompted a response from numerous races — including a semi - robotic race called the Daleks . This alarms the Doctor , and he begins to interrogate Elgin , discovering that the Daleks did attack once , but failed to penetrate the defences . Outside the time barrier , Ace meets the wounded Bev Tarrant . The duo are then captured by the Daleks , and — unknown to Bev — Ace is copied into a human - form Dalek operative . As Ace has been given a security tag for the library , the duplicate is able to return and infiltrate the library . At the same time , the Doctor takes Elgin out to find Ace , deeming the situation unsafe in case the Daleks are still around . He finds her — or rather , the duplicate — and Tarrant , and has them taken to the library ’ s medical bay . He then has Elgin take him to the nearby ziggurat , which has piqued his curiosity . Near the ziggurat , they find the remains of Tarrant ’ s crew , with some oddities about their corpses . Elgin tells him some unsettling stories about supposed phantoms in the jungle , dating from earliest colonisation . They then find that the ziggurat has been opened from the inside . Putting things together , the Doctor realises it ’ s not an ancient artefact , but rather , is a Dalek hibernation unit — and its inhabitants have now awoken ! He finds a cloning chamber in the corner , and realises that the Ace he sent to the medical bay is a Dalek operative . “ Ace ” lowers the defence grid , and the Supreme Dalek orders its ship in orbit to send in attack troops . Their plan , it seems , is to seize control of the wetworks facility and its store of data . The Daleks kill everyone in the library except a few key individuals ; they save Tarrant for use in luring out the Doctor if necessary , and send the real Ace to join her at the library . They require the Doctor for his Time Lord brain ; without him , their download of the data in the wetworks will take far longer , delaying their invasion — in fact , a test run , without the Doctor , sends the test Dalek into madness . The Doctor and Elgin try to return to the TARDIS , but are intercepted and captured by the Dalek Supreme . They are returned to the library ; the Daleks explain that they plan to create a Dalek that can contain the data store , creating a mobile repository of information that can be used to conquer first the galaxy , then the universe . For this , they require a Time Lord brain . The ziggurat — and others like it around the region of space — was a trap set to spring at first detection of a time capsule of any type . The Doctor is plugged into the system , and the experiment succeeds — the second test Dalek acquires the data . However , the strain appears to kill the Doctor . The Dalek Supreme returns to his ship to destroy the library . Ace and Tarrant are intercepted by the body of Tarrant ’ s partner , Rappell , which is now animated by … something . The entity says that it is a native of Kar - Charrat ; its species is water - based , not just living in the water , but composed of water , which is what allows it to inhabit the body . It and its kind are fighting for survival , as the wetworks represents imprisonment and death to them . Meanwhile , they have saved the Doctor , by temporarily uploading his mind into the wetworks . They explain everything to him , and return him to his body , on condition that he keeps his promise to save them . Meanwhile , Daleks are dying mysteriously . The test Dalek , due to its newfound knowledge , deduces the truth about the natives , who are the source of the Kar - Charrat phantom stories . It realises that the natives can infiltrate Dalek casings and drown the mutants inside . It insists the natives are non - hostile except in self - defence ; but the Supreme Dalek can ’ t accept this , and orders their extermination . The Dalek Supreme reports to the Dalek Emperor on Skaro , and is ordered to continue the plan , including destruction of the planet . Back in his body , the Doctor castigates Elgin for the genocide that the wetworks poses to the natives . He then gathers Elgin , Prink , Ace , and Tarrant and takes them to the TARDIS , planning to destroy the wetworks and free the natives . Along the way , the duplicate Ace arrives and captures Elgin , prompting Prink to attack her . She kills Prink , but is killed in turn by the natives . Inside the library , Ace bluffs her way past the Daleks by pretending to be the duplicate . The Dalek Supreme orders the destruction of the library , but is attacked by the test Dalek , who now sees no purpose in the destruction . During the conflict , Ace plants Nitro - 9 explosives on the wetworks , and the Doctor sets up a final download which will remove the data load from the natives in the system . As the explosives detonate — and the Doctor and Ace escape in the TARDIS — the natives drown the remaining Daleks ; after a final report to the Emperor , the Dalek Supreme self - destructs . The library is now the ruin it always appeared to be . Elgin , repentant of his mistake , chooses to stay and await the next visit from the Time Lords , hoping to recover some of the lost knowledge from the ruins . Tarrant returns to her own ship . The Doctor and Ace depart the planet in the TARDIS ; but they know that the Daleks have only been set back , not deterred .