Slavery Slavery , as Paul LeVal wrote in 1861 , was " one man owning another " . Often , but not always , the enslaved were " different " than their oppressors . In LeVal ' s day , the basis of slavery was " skin colo [ u ] r or land of origin " , but off Earth , ( PROSE : " Blood and Hope " ) some " species " would enslave other " species " . ( TV : " Planet of the Ood " , " Before the Flood " ) Humans and slavery . Human ity had a long and largely unhappy relationship with slavery . Sometimes other species enslaved humans , but there were many examples of one group of humans enslaving one another , as well as of humans enslaving other species . Daleks . Dalek s forced many people into labour in Bedfordshire , ( TV : " The Dalek Invasion of Earth " ) as well as on Skaro itself . ( TV : " Destiny of the Daleks " ) Slavery was also present on the planet Nixyce VII . ( AUDIO : " The Traitor " ) Daleks also occasionally enslaved humans through physiological manipulation , such as when they created robomen or " humanoids " . ( TV : " The Dalek Invasion of Earth " , COMIC : " The Humanoids " ) The Cult of Skaro once attempted to actually blend Dalek and human DNA to create a more reliable class of slave labour . ( TV : " Evolution of the Daleks " ) During the Last Great Time War . Daleks converted their enemies into Dalek Slave s . ( COMIC : " Four Doctors " ) Other species enslaving humans . At least one Time Lord — — enslaved humans on a massive scale . Through fear alone , he got virtually the entire population of 21st century Earth to help him create what he termed " the New Time Lord Empire " , a project that involved massive building works all around the planet . ( TV : " Last of the Time Lords " ) The species behind the Company enslaved the members of the Vanir to work on the dangerous " Terminus " . ( TV : " Terminus " ) On Ravolox , the robot Drathro enslaved five hundred humans residing there , whom he called " work units " , in an underground facility . ( TV : " The Mysterious Planet " ) During their invasion of Earth on Christmas Day 2006 , the Sycorax planned to sell half of humanity into slavery . ( TV : " The Christmas Invasion " ) Humans enslaving humans . At different points in their history , some humans enslaved other humans . In 2011 , Luke Smith summed up humanity ' s history of slavery to his sister Sky Smith : The Roman s enslaved other people . Both Ian Chesterton and Barbara Wright were sold into slavery . ( TV : " The Romans " ) Centuries later , humans like Doland looked favourably upon the Roman Empire ' s use of slavery . ( TV : " Terror of the Vervoids " ) In Rome in 120 , Vanessa Moretti was accused of being a runaway slave and was claimed by Balbus because she had no proof to refute this claim . ( PROSE : " The Stone Rose " ) By the 15th century , it was against Spanish custom to engage in the slave trade . ( AUDIO : " Trouble in Paradise " ) Slavery of Africa ns was institutionalised in the United States of America , enshrined in the Constitution of the United States . However , the nation was deeply divided on the issue , and there was a tenuous balance between those people — typically in the North — who wanted it abolished and those — often in the South — who saw slaveholding as a moral right . This tension finally exploded into the American Civil War . South Carolina , the first state to secede from the US , justified its action in a declaration which clearly cited US President - elect Abraham Lincoln ' s hostility to slavery as a main cause for secession . Since secession directly resulted in war , slavery was a central reason the war was fought . The eventual victory of Lincoln was something the Fifth Doctor , Peri Brown and Erimem were on hand to witness — although Erimem was sometimes unpleasantly mistaken as a slave because of her darker skin . ( PROSE : " Blood and Hope " ) Likewise the English enslaved the Scottish during the mid - 18th century . People like Solicitor Grey and " Annabelle " captain Trask routinely forced Scots from the Highlands to the West Indies and North America . They attempted to give it the veneer of legal propriety by having each Scot sign a contract , whereby their labour was exchanged for the " privilege " of ocean transport to their new " home " , but these signatures were effectively coerced . Clearly , the Second Doctor and Ben Jackson saw it for the slavery it really was . The Doctor , in fact , deprived Grey of his contracts for one particular voyage , thereby removing even the veneer of propriety from Grey ' s activities . ( TV : " The Highlanders " ) Indeed , Grey himself privately confided to his co - conspirators that he knew very well he was sending the Highlanders into slavery , saying to Trask , " But to take these cattle fresh to the slave plantations — before their health has been sapped by His Majesty ' s prisons — that takes skill and preparation . " ( PROSE : " The Highlanders " ) Other parts of the world were involved in the slave trade , as well . The Fifth Doctor once told Turlough that he recalled seeing slave ships in the harbour at Rio de Janeiro in 1700 . ( AUDIO : " Loups - Garoux " ) Humans enslaving other species . In the 21st century , there was a black market in alien slaves on Earth . John Harrison purchased a group of Skullion slaves on this market . ( TV : " The Man Who Never Was " ) It was certainly Doland ' s intent to turn the Vervoid s into slave labour . Had he been able to deliver the sentient plants to Earth , he intended to use them as cheap replacements for robot s . He didn ' t know , however , that the Vervoids themselves had the ability and desire to kill every bit of animal life they encountered . ( TV : " Terror of the Vervoids " ) As Rose Tyler observed , humans enslaved the Ood in her far future . Even in remote outposts , some humans , like Danny Bartock , were charged with keeping order amongst the Ood by using a variety of technological devices , such as those which measured Basic , a scale for determining the level of Ood telepathic output . ( TV : " The Impossible Planet " ) As Donna Noble would later discover , the humans of the 42nd century had industrialised and commercialised Ood slavery . By 4126 Ood Operations , the company in charge of the Ood , were having difficulties in the vast marketplace of the Second Great and Bountiful Human Empire . They began a new , aggressive advertising scheme that year which slashed prices , added " extra features " to the translator ball s and generally attempted to " rebrand " Ood with Ood Operation ' s dealers . Donna and the Tenth Doctor were repulsed by this blatant commercialism . Together , they helped the Ood revolt and end human Ood trafficking . ( TV : " Planet of the Ood " ) Tharil s were traded by the humans because of their time sensitivity , used to pilot ships in the fourth dimension . Romana devoted herself to overthrowing this commerce . However , in a previous age , the roles had been inverted : humans had been enslaved by the Tharils themselves as servants . ( TV : " Warriors ' Gate " ) Slavery between non - humans . Slavery was hardly a phenomenon exclusive to human culture . For instance , the Kaled s enslaved Muto s . ( TV : " Genesis of the Daleks " ) Tivolian s had an ongoing " desire " to be conquered and enslaved by others . ( TV : " The God Complex " ) When the Arcateenian s freed them from the armies of the Fisher King , the Tivolians were distraught and irritated the Arcateenians so much that they chose to enslave the Tivolians themselves by the year 1980 . ( TV : " Before the Flood " ) After invading Gallifrey , Stor decided not to kill the Time Lord s he had hostage , believing that " slavery [ was ] more efficient " . ( TV : " The Invasion of Time " ) Huduct s enslaved Anubian s by using mind - controlling torc s . After the Anubians were liberated by K9 Mark I , the Anubians turned on their former masters and enslaved them in the same way , even though K9 intended for them to reconcile in peace . The Anubians later developed space travel and enslaved other species . ( TV : " Curse of Anubis " ) The Klepton s enslaved the Thain s they abducted from their city . ( COMIC : " The Klepton Parasites " ) The Voord on Kandalinga enslaved the native Fishmen to build dry land for them . ( PROSE : " The Fishmen of Kandalinga " ) The Masters of Dorada enslaved the Doradan s , forcing them to work in factories . ( PROSE : " The Dream Masters " ) On a planet , the fair - haired people were the slaves of the black - haired people until they were freed by passing the tests of Trefus . ( COMIC : " The Tests of Trefus " ) The Mentor s from Thoros Beta took many Thoros Alphan s from their homeworld for use as menial labour and experiments . Thanks to the intervention of Yrcanos and the Sixth Doctor , the control centre which let them to be enslaved was destroyed . ( TV : " Mindwarp " ) The Janus Anah and Anahson came to the trap street in London to escape slavery . ( TV : " Face the Raven " ) The Rocket Men owned hundreds of slaves . ( AUDIO : " Requiem for the Rocket Men " )