51st century In the 51st century , humanity began to spread into the galaxy and to deal with time travel . Another Ice Age affected Earth during this time . ( TV : " The Talons of Weng - Chiang " ; PROSE : " Emotional Chemistry " ; AUDIO : " The Butcher of Brisbane " ) Earth began to be abandoned by the rich and powerful as the sun went supernova . Those left behind were fractured into millions of nation - states ( " Alliances " ) battling through the ether in the Transmat Wars . ( COMIC : " The Keep " ) Humanity was sexually liberal , widely accepting both same - sex relations and inter - species ones . ( TV : " The Doctor Dances " ) Human bodies in this period evolved to produce more highly evolved pheromone s , which made them more sexually attractive than their ancestors . ( TV : " Day One " , " Fragments " ) The Church was a faith - based military organisation primarily responsible for interstellar security , protecting human populations , and special covert operations . Regular military ranks were replaced by offices such as Bishop , Cleric and Verger . ( TV : " The Time of Angels " , " Flesh and Stone " ) The Time Agency operated out of this century , but it was closed again in the same century . ( TV : " The Talons of Weng - Chiang " , " The Empty Child " , " Kiss Kiss , Bang Bang " ) Law and order collapsed in this century . Derek O ' Dell , a fan of the 20th century comic book " Aggrotron ! " , adopted the identity of Courtmaster Cruel , a character from the comic , to strike fear into the hearts of criminals . ( AUDIO : " Izzy ' s Story " ) Ionisation was used to combat the glaciers caused by the Ice Age , and the Brittanicus Base was established by this time . ( TV : " The Ice Warriors " ) The Supreme Alliance of Eastern State , at the initiative of its Minister of Justice Magnus Greel , experimented with time travel using a method developed by the alien scientist Dr Sa Yy Findecker based on double nexus particle s and zygma beam , but this proved to be a dead end . Greel was said to be the first human to travel through time , arriving in China during the 19th century , but became horribly disfigured by it . ( TV : " The Talons of Weng - Chiang " , AUDIO : " The Butcher of Brisbane " ) World War VI also took place in the early 51st century . The Icelandic Alliance fell and the Supreme Alliance of Eastern States , of which Magnus Greel was Minister of Justice , rose in its stead . The Supreme Alliance committed a number of war crimes and was brought down by the Filipino Army at the Battle of Reykjavik , which the Fourth Doctor witnessed . ( TV : " The Talons of Weng - Chiang " , AUDIO : " The Butcher of Brisbane " ) Also in the early 51st century , Magnus Greel killed approximately 100 , 000 people , a deed which earned him the epithet " Butcher of Brisbane " . ( TV : " The Talons of Weng - Chiang " ) Consequently , the area where the corpses were kept became known as the Brisbane Dead Zone . ( AUDIO : " The Butcher of Brisbane " ) The weapons factories of Villengard were destroyed by the Doctor and replaced by a banana grove . ( TV : " The Doctor Dances " ) The spaceship SS " Madame de Pompadour " became disabled . Adrift in the Dagmar Cluster , its Clockwork Droid s repaired the ship using whatever they could find , including the crew , and attempted to kidnap the original Madame de Pompadour from the 18th century to use her brain as their computer core . This was thwarted by the Tenth Doctor . ( TV : " The Girl in the Fireplace " ) Its sister ship , the " Marie Antoinette " , fell through time to ancient Earth . The Clockwork Droids , controlled by a central droid which grew to become a cyborg , eventually surfaced in Victorian London where they harvested organs until the newly regenerate d Twelfth Doctor stopped the Half - Face Man . ( TV : " Deep Breath " ) The Eleventh Doctor and Amy Pond , along with River Song witnessed the crash of the " Byzantium " , then confronted the last of the Weeping Angel s in the Maze of the Dead . ( TV : " The Time of Angels " / " Flesh and Stone " ) The Tenth Doctor and Donna Noble visited the Library where they faced an infestation by the Vashta Nerada . The Doctor met River Song for the first time in his personal timeline ( but not in hers ) . River retrieved the consciousnesses of some 4 , 022 humans who were uploaded to the memory banks of the supercomputer , CAL , died , and uploaded to the Library ' s computer . ( TV : " Silence in the Library " / " Forest of the Dead " ) Notable individuals . Jack Harkness , ( TV : " The Doctor Dances " ) John Hart , ( TV : " Kiss Kiss Bang Bang " ) K9 Mark I , ( TV : " The Invisible Enemy " ) Gray ( TV : " Adam " ) and Magnus Greel ( TV : " The Talons of Weng - Chiang " ) all came from this century .