Timewyrm Before reforming and living out her life as a human , the ever - changing apocalyptic super - being known as the Timewyrm threatened the universe more than once . Mythology . Even before Qataka was named as such , the Timewyrm existed , and would always exist in some form , as a creature from the Green and Black Books of Gallifrey . It was envisioned as a dragon that circled the universe until it ate its tail , and a prophecy foresaw that at the end of time , when Fenric slipped its chains , the Timewyrm would consume Rassilon in its jaws . ( PROSE : " " ) This knowledge existed at the core of the Matrix , the oldest input from Ancient Gallifrey , which the Fourth Doctor described as " very apocalyptic , end of the Universe " and the Seventh Doctor described as a horror unleashed upon the multiverse . ( PROSE : " " ) Another Time Lord prophecy predicted that Gallifrey would survive attacks from numerous threats , including the Timewyrm , before its ultimate destruction . ( PROSE : " The Gallifrey Chronicles " ) The Fourth Doctor learned of his role in the creation of the Timewyrm when he was appointed as Lord President and granted access to the Matrix , but automatic safeguards erased his memory of his discovery , leaving him only long enough to leave a recorded message for his future before he forgot about the discovery . ( PROSE : " " ) Power . A unique creature , the Timewyrm was able to slip between times , able to go anywhere and any when in the universe and feed on minds . ( PROSE : " " ) In addition to feeding on them , the Timewyrm could completely possess an individual and extend their life for thousands of years , ( PROSE : " " ) although it could become trapped in the person ' s mind if they were strong enough . ( PROSE : " " ) Biography . As Qataka . The Timewyrm began as Qataka , a brilliant but amoral inhabitant of the planet Anu . Obsessively fearful of death , and aware of stories of the Time Lord s , she sought immortality . She experimented with cybernetics and made several breakthroughs , then began stealing brain tissue . She linked her own brain to a computer to preserve her memories and found she could use this to dominate the minds of those in whom she implanted radio receivers . Qataka ' s crimes were discovered and she was captured , tried and executed . However , she had uploaded her mind into a cybernetic body built by her slaves . This resembled a giant snake with platinum alloy skin . She fled Anu with her slaves , destroying the planet with a cobalt bomb . ( PROSE : " " ) As Ishtar . Utnapishtim and his followers had already left Anu . He pursued Qataka to the Sol system and fought her . Qataka ' s slaves died and her ship was destroyed , but her escape pod landed on Earth , where she met Gilgamesh . She read his thoughts , took on the identity of Ishtar , the local goddess of love and war and tried unsuccessfully to mentally enslave him . She was later found by Dumuzi , the high priest of Ishtar in nearby Kish . She took control of his mind and was soon virtual ruler of the city - state . Ishtar used her slaves to put copper plating around the walls of Kish . This would have turned the city into a giant radio transmitter and she would take control of every mind in the region before taking over Earth . Utnapishtim uploaded a computer virus into her , unaware she had programmed a cobalt bomb to detonate on her death , destroying the planet . The Seventh Doctor disarmed the bomb by linking her computer systems to the telepathic circuits of his TARDIS . This let Ishtar upload her consciousness into the TARDIS and she tried to take control of the ship . The Doctor jettisoned Ishtar and a piece of his TARDIS into the Time Vortex , hoping to destroy her , but she survived in the Vortex , combining her mind with the power of the secondary console room that he had ejected . He had helped create the Timewyrm by allowing the fusion of the Time Lord technology with the mind of Qataka . ( PROSE : " " ) As the Timewyrm . The Timewyrm escaped Earth , which she decided to destroy to spite the Doctor . Looking for a suitable host , she chose Adolf Hitler , but did not count on his mind ' s strength and was trapped . The Doctor and Ace , having been to an alternate timeline in which Hitler used the power of the Timewyrm to win World War II , tracked the entity to Dunkirk and banished it from Hitler ' s mind by convincing Hitler that he didn ' t need it , scattering it throughout time and space . ( PROSE : " " ) The greatly weakened Timewyrm decided to travel back into the Doctor ' s personal timeline and strike when he was at his weakest : arriving at a point just after his first regeneration , subsequently hiding in his mind . During the Second Doctor ' s visit to the Panjistri homeworld in the far future , she found a suitable host in Lilith and transferred herself into her . She used most of her power extending her host ' s lifespan the five thousand years it took the Panjistri to complete the God Machine , which she planned to use to conquer time and space . However , when merged with the God Machine , the resulting entity banished the Timewyrm . ( PROSE : " " ) The Timewyrm used Chad Boyle and Anthony Rupert Hemmings as agents in a struggle on 20 December 1992 . It took place simultaneously on the Moon ( where she had transported from Cheldon Bonniface ) and the Doctor ' s own mind , the Timewyrm having planted a seed of itself in his subconscious during their initial confrontation . Aware of this , the Doctor had intended to crush the Timewyrm , but when Ace was trapped in his mind as well , the Doctor took the TARDIS into the real - world / imagination interface to confront it directly . At the end of the battle , he banished the Timewyrm ' s power into dormancy and erased its memories . Its ' essence ' , however , was implanted in the mind of a baby ( who had no upper brain functions before the transfer , having been a genetically - engineered infant intended to be used for disease research in the future ) . He gave the baby to Emily and Peter Hutchings , who lived in Cheldon Bonniface and asked they name her Ishtar . ( PROSE : " " ) After this , the Timewyrm cast off its physical form and existed purely in Puterspace . Using Bernice Summerfield and Ace , the Doctor sent them to cause time distortion in 1981 and the 57th century , drawing the Timewyrm out to feed on the interference with the Web of Time . While it thought it trapped the Doctor in puterspace and planned to feed on time , the Doctor revealed that his earlier attempt to destroy her using an object he spent centuries constructing had actually altered her nature . Noting that the time stream was in flux , she returned to puterspace , no longer able to manifest in the real universe . ( COMIC : " The Last Word " ) As Isthtar Hutchings . On 24 April 2010 , Ishtar met Chris Cwej at Benny ' s wedding in Cheldon Bonniface , had a dalliance with him and bore his child , Jasmine Surprise Cwej - Hutchings . Her middle name , " Surprise " , was the same as Benny ' s . The Doctor briefly reactivated Ishtar ' s powers as the Timewyrm when his old friend , the Brigadier , was killed before his allotted time , Ishtar ' s temporal blast not only eliminating the Master ' s minions but restoring the Brigadier to life and youth . ( PROSE : " Happy Endings " )