Sabbath Dei Sabbath Dei , most often just called Sabbath , was a rogue agent of the Service in the 18th century . He became involved with Faction Paradox and the Great Houses during the War ; after its end , he instituted himself as a time - active champion of Earth and became an enemy of the Eighth Doctor . Biography . Early life . Sabbath Dei was born in 1740 . ( AUDIO : " Sabbath Dei " ) Since agents of the Service ' s past lives were erased , the details of his pre - indoctrination identity was unknown . ( PROSE : " The Adventuress of Henrietta Street " ) He remembered glimpsing the Eleven - Day Empire as it passed from the British Empire to Faction Paradox in 1752 . ( COMIC : " Bêtes Noires & Dark Horses " ) Working for the Service . Sabbath was indoctrinated into the Service in 1762 at the age of 21 . ( PROSE : " The Adventuress of Henrietta Street " , AUDIO : " Sabbath Dei " ) He specialised in engineering of the occult geometry of the Masonic movements . He was inducted on a Saturday ( which may have inspired his Confirmation Name , by the Jewish cabbalistic trend in the Service ) by being bound with thirteen chains , thirteen locks , and thirteen garters ; covered with a hood of black sackcloth ; hung with three hundred pounds of lead ; and dropped into the Thames . He was certain of his death , and he believed he saw a vast Leviathan passing over him as a shadow while he lay on the bottom of the river , though that may have been the darkness of unconsciousness . He never emerged from the river , and he was presumed dead . ( PROSE : " The Adventuress of Henrietta Street " ) However , he was saved from this certain death to be used as a tool for off - planet powers : ( PROSE : " Sometime Never " ) he appeared dry and unharmed at Cambridge the following morning . ( PROSE : " The Adventuress of Henrietta Street " ) Later that year , Sabbath attended the Hellfire Club ' s ball at Medenham Abbey , where he challenged Cousin Eliza to a game of pontoon where the loser of each hand would have to give a truthful answer to the winner ' s question . He forfeited the match when asked who his employer was , and he advised Eliza to look into the death of Mary Culver . He then followed the Sieur d ' Eon into the cavern beneath the Abbey , where he met Cousin Justine and warned her the Service wouldn ' t let the Order of St Francis form an alliance with the Eleven - Day Empire . Later , the Earl of Bute instructed Sabbath to investigate the Supplication of the Anakim ritual , which was reportedly performed by Mary Culver prior to her death ; Sabbath performed the supplication ritual on himself and , rather than becoming fully possessed , simply became driven to serve the Great Houses by bringing Justine to justice . ( AUDIO : " Sabbath Dei " ) He found Justine at St James ' Square and transformed the architecture into a courtroom in the jurisdiction of the Houses . When Justine challenged the validity of the Grandfather ' s crimes in the light of Lolita ' s violations of the protocols of history , Sabbath summoned Lolita to the courtroom to hear her testimony ; after this testimony , met with no objection from the Great Houses ' representatives , he dismissed Lolita and condemned Justine to the Homeworld ' s prison planet . During this , he became an uneasy ally of Compassion - as - Culver in her plot against Lolita . Shortly after his ritual , he told Compassion ( through Lord Sandwich ) that he would keep out of her way if she kept out of his , and while taking Justine to trial he told Eliza and d ' Eon where to find the automata . By summoning Lolita to the courtroom , he also gave them an invaluable chance to attack the automata . After the trial , his commitment to the Great Houses fulfilled , he visited Compassion to congratulate her on her victory over Lolita , telling her and her allies where to find Justine . ( AUDIO : " In the Year of the Cat " ) After the War ended , Sabbath continued to work for the Service , eventually becoming its commander by 1774 . He caught Cleeve and the America n ambassadors to King George III performing an Anasazi ritual to the god Teskatsipotcha , and he sent the Service ' s Ratcatchers to catch Mayakatula . ( COMIC : " Bêtes Noires & Dark Horses " ) According to the post - War edition of the " Primer for the Spiral Politic " , he was one of the few individuals to bring his own agenda to the War . ( AUDIO : " Sabbath Dei " ) Going rogue . In 1780 , Sabbath defected from the Service and set up his own independent power base . He sent a message via a number of corpses of the Service ' s Ratcatcher s saying , " leave me alone , and I ' ll leave you alone " . ( PROSE : " The Adventuress of Henrietta Street " ) Shortly after this , at St . Cedd ' s College , Sabbath was approached by the Council of Eight , who warned him of the impending arrival of the Doctor . ( PROSE : " Sometime Never . . . " ) Sabbath encountered " Leviathan " under the River Thames as part of his indoctrination ceremony into the Service . He set up his own power base independent of the Service . After leaving the Service , Sabbath sent a message via a number of corpses of the Service ' s Ratcatchers , saying " Leave me alone , and I ' ll leave you alone . " The Doctor chose Sabbath for his best man at his wedding to Scarlette . Sabbath later removed the Doctor ' s second heart , allegedly to cure the Doctor of an illness caused by the heart ' s attempt to connect the Doctor to the non - existent Gallifrey , but also allowing Sabbath to travel through time in " the Jonah " , endowing him with the Doctor ' s ability to penetrate " deep time " — exploring the universe beyond his home era and planet — that would have been impossible in his more primitive ship otherwise . ( PROSE : " The Adventuress of Henrietta Street " ) Travelling through space and time . Sabbath had multiple agents analogous to the Doctor ' s companion s . Among them were Juliette Vierge , ( PROSE : " The Adventuress of Henrietta Street " ) Sasha and Jueves , ( PROSE : " History 101 " ) Jaxa and Roja , former Time Agents , ( PROSE : " Trading Futures " ) and The Angel Maker ( aka Elizabeth Kelly ) . ( PROSE : " Camera Obscura " ) Sabbath arranged for the Doctor and the Clock People to meet on a Plutocratic Empire colony planet , manipulating the Doctor ' s perception of the situation so that he would see the creatures as a threat rather than evacuees , driving the Doctor to force the Clock People back into the Time Vortex by sealing the rift they were using to access our reality . ( PROSE : " Anachrophobia " ) He later tricked the Doctor into destroying the System , a mysterious information - gathering program that allegedly contained information about his initiation that should not be made public , by provoking the System into a nervous breakdown as it tried to process multiple perspectives trying to understand Sabbath ' s agent . ( PROSE : " History 101 " ) While near death , Sabbath met , learning that the Doctor ' s second heart created a link between the Doctor and Sabbath that prevented the Doctor from dying ; even if his chest was virtually crushed , one of his hearts was still beating in Sabbath . After this link resulted in the Angel - Maker sacrificing herself to save the Doctor in the belief that she would also save Sabbath , Sabbath tore out the heart , allowing the Doctor to grow a new one . ( PROSE : " Camera Obscura " ) Sabbath was sent by his masters to take actions that would allegedly " collapse " reality into a single manageable timeline , convinced that time - travellers weakened reality by creating new universes every time they went back in time . This plan failed , and instead Sabbath ' s actions caused every parallel universe to overlap and fight for dominance . ( PROSE : " Time Zero " ) Realising that his plans had not worked , Sabbath kidnapped two of the Warlocks of Demigest and planned to use their powers to his advantage . He took the Warlocks in the " Jonah " to Selonart , where he attempted to become one with the universe due to the unique conditions on the planet . He planned to use the Warlocks to then help him control the universe . Sabbath ' s plan backfired due to the intervention of the Doctor and Bloom . Sabbath was then taken by the Warlocks back to Demigest where he was kept as their prisoner . The Doctor arrived later and killed the Warlocks , allowing Sabbath to escape . ( PROSE : " The Infinity Race " ) Sabbath later assisted Fitz Kreiner , Anji Kapoor and the Doctor when the multiple realities began to converge and mix . ( PROSE : " The Last Resort " ) Death . Sabbath was finally killed after turning his back on his employers and helping the Doctor ; realising that his employers gained power from predicting future events , and with their plans now dependent on Sabbath killing either the Doctor or the head of the Council , Sabbath instead shot himself , something that the Council " knew " he wouldn ' t do . ( PROSE : " Sometime Never . . . " ) Alternate timeline . In an alternate timeline , a version of Sabbath imprisoned Alan Turing , preventing the creation of the computer . He believed that his actions were to turn Turing into a temporal nexus whose death would cut Sabbath ' s world off from the rest of the multiverse and protect it from the catastrophe that had been unintentionally set off by the " prime " Sabbath , but in reality killing Turing just accelerated the multiversal damage . ( PROSE : " The Domino Effect " ) Personality . Sabbath was generally opposed to chaos and believed that unauthorised time travel created parallel universes which threatened reality . Sabbath was confident in his mental abilities . Aided by the Doctor ' s second heart , he survived a journey into ' s realms . ( PROSE : " Camera Obscura " ) He was incredibly stubborn and disliked beings who lorded their powers over others , including the Doctor . However , this arrogance also meant that he found it hard to admit when he was wrong , constantly convinced that he understood time better than the Doctor even after the Doctor provided evidence that time travel did not work the way Sabbath believed it did . ( PROSE : " Time Zero " ) Sabbath used many pseudonyms , often variations upon his chosen name of Sabbath , such as Holiday or Mistletoe . ( PROSE : " Anachrophobia " , " Time Zero " ) Although he openly scorned his agents , he was fiercely loyal to them . ( PROSE : " The Adventuress of Henrietta Street " ) Appearance . Sabbath was bulky and muscular . His body was getting fat , having concluded that he was better served as a behind - the - scenes manipulator rather than taking action himself . He kept his head almost shaved . This was not a political statement or an attempt to intimidate people , but to save time and energy in grooming . ( PROSE : " The Adventuress of Henrietta Street " ) Many of Sabbath ' s clothing choices echoed the Doctor ' s ; for example , he wore a linen suit after adopting the role of Time ' s Champion . ( PROSE : " Camera Obscura " ) Cousin Eliza said he looked nothing like Godfather Sabbath . ( AUDIO : " Sabbath Dei " )