Universe A universe was a space - time continuum and the matter , energy , laws and biodata contained therein , operating as a complete totality unto itself . According to the Eleventh Doctor , coincidences occurred as it was a form of amusement for the universe . ( TV : " Closing Time " ) It also rewarded those , like the Doctor , who repeatedly saved it from destruction . ( TV : " The Snowmen " ) Cosmology . Multiple universes existed ( TV : " Inferno " ) separated by an expanse called the Void . ( TV : " Army of Ghosts " ) Prior to the Last Great Time War , the Time Vortex could be used to access one another . Since the War , the pathways had closed ( TV : " Rise of the Cybermen " ) and travel usually only occurred through a Void Ship or the reality bomb breaking down the fabric of the walls of reality surrounding each universe . ( TV : " Army of Ghosts " , " The Stolen Earth " / " Journey ' s End " ) Some universes existed sideways or parallel to each other . ( TV : " Battlefield " ) Likewise , some existed before ( PROSE : " All - Consuming Fire " ) or after ( PROSE : " Millennial Rites " ) each other . Many universes developed a civilisation equivalent to that of the Time Lord s - the first culture within a given reality to reach a level of sophistication which allowed them to tailor the laws of that universe to their own nature . ( PROSE : " Cold Fusion " ) The composition of the universe consisted of galaxies which contained star s which were orbited by planet ary bodies . Earth , for example , lay in the Sol system of Mutter ' s Spiral , the galaxy closest to the Andromeda Galaxy . Parallels . Although it was possible for complete new universes to form by ' branching off ' from specific points in another universe ' s history , doing so cut the lifespan of the original universe in half . ( PROSE : " Blood Heat " ) History . Before . The pre - universe which existed prior to the Doctor ' s had a green void , stars shaped like doughnuts and physical laws closer to what might be understood as magic . ( PROSE : " Millennial Rites " ) Knowledge of this universe was a closely guarded secret , and was only in the Doctor ' s possession as a result of his connection to the Matrix during his time as Lord President . ( PROSE : " Millennial Rites " ) Even then , the knowledge would ultimately have proven temporary ; in his sixth and seventh lives the Doctor was fully conversant with the details and specifics of this universe ( PROSE : " All - Consuming Fire " , PROSE : " Synthespians™ " ) , but by his tenth life it was almost an article of religious faith to him that such a universe could not have existed . ( TV : " The Satan Pit " ) This universe ' s equivalent to the Time Lord s were the Great Old One s , who found a means by which to survive into the next . ( PROSE : " All - Consuming Fire " , PROSE : " Millennial Rites " ) The Beast claimed to have existed before the universe . ( TV : " The Impossible Planet " ) It was also speculated that the Ancient Lights came from the previous universe . ( TV : " Secrets of the Stars " ) Current . The universe of the Doctor and of the Time Lord s was known as N - Space . It was in a state of constant expansion ( TV : " Genesis of the Daleks " ) and was created out of a continually existing black void roughly thirteen ( TV : " Secrets of the Stars " ) or fourteen billion years BC in what was known as Event One . ( TV : " Castrovalva " ) The universe passed the point where it should have succumbed to heat death by the 20th century , but vented most of its entropy into E - Space . ( TV : " Logopolis " ) The universe was replete with pocket universe s and other realms or domains discrete from the wider continuum . Some of these existed in exotic special dimensions such as Calabi - Yau Space ( PROSE : " The Quantum Archangel " ) , some folded into quirks of perceptual history such as the Eleven - Day Empire ( PROSE : " Interference - Book One " ) and others , such as Mictlan , had no measurable existence beyond the purely conceptual . ( PROSE : " Alien Bodies " ) When the Olympian Prometheus stole life spore s from the planet Olympus and let them go across the universe , he created life . This angered Zeus , who chained Prometheus to a mountain on an unknown planet for his actions . ( COMIC : " The Life Bringer " ) Greyjan the Sane , on the other hand , stated that life evolved from a single ancestor cell . This didn ' t include more exotic lifeforms , which came into being soon after the creation of the universe . ( PROSE : " The Ancestor Cell " ) The Time Lord s of Gallifrey , as the first sentient culture to develop within their universe ( PROSE : " Lucifer Rising " ) , were responsible for setting the parameters within which the universe operated . ( PROSE : " Sky Pirates ! " ) They expunged magic in favour of science as the basic governing principle . ( PROSE : " " , " Christmas on a Rational Planet " ) They also established the morphic field that favoured the development of humanoid life . ( PROSE : " Lucifer Rising " ) They established the Web of Time which guaranteed the universe a stable , linear history . ( AUDIO : " Neverland " ) After the Time Lords were lost to the Last Great Time War , the universe became a more uncertain and dangerous place . Travel to other universes became impossible ( TV : " Rise of the Cybermen " ) and the creation of time paradox es had a much more dangerous effect . ( TV : " Father ' s Day " ) The destruction of the Doctor ' s TARDIS created cracks in time throughout time and space which began erasing the universe . By piloting the Pandorica ( which basically contained a blueprint for the universe ) into the heart of the TARDIS explosion ( which was happening at all points in space and time ) , the Eleventh Doctor rebooted the universe , restoring it to its original state . It is unclear , however , if everything erased by the cracks were restored . Amy Pond ' s parents , her husband Rory and the Doctor were all restored , but this was only due to her specifically remembering them and the influence of one of the cracks on her life for years . In the case of the Doctor , she had to actively remember him in order to restore him after he was erased by the cracks while restoring the universe , so everything else erased , such as the Weeping Angel s , may not have been restored . ( TV : " The Pandorica Opens " , " The Big Bang " ) After . The end of the universe , also known as Event Two ( PROSE : " The Infinity Doctors " ) , was variously projected to have occurred in 60 billion AD ( AUDIO : " Zagreus " ) , 100 trillion AD ( TV : " Utopia " ) or , in another universe , 100 , 000 , 000 , 000 , 000 , 000 , 000 , 000 , 000 , 000 , 000 AD . ( PROSE : " The Infinity Doctors " ) Though the Tenth Doctor denied the existence of a universe before his own ( TV : " The Impossible Planet " ) , he remained aware that the death of his universe would have been followed by the birth of another . ( TV : " Army of Ghosts " ) Many time travellers killed themselves at the end of the universe in the Institute of Time because they feared the universe ' s heat death . ( PROSE : " The End " ) The after - universe was a pink void interspersed with yellow mists of orbiting plankton and Saraquazel , who became its equivalent of a Time Lord . ( PROSE : " Millennial Rites " ) The Zytragupten also inhabited this universe . ( COMIC : " The Stockbridge Child " )