Earth Earth , also known as the Earth ( TV : " The Christmas Invasion " , AUDIO : " The Beginning " ) and Planet Earth , ( TV : " World War Three " , " The Long Game " , " Bad Wolf " ) was a planet in the solar system whose native sapient species were primarily the human race ( TV : " The End of Time " ) and the Silurian s , ( TV : " Doctor Who and the Silurians " ) though they were by no means the only intelligent species to develop there . The twin planet of Mondas , it was the third planet from its sun and therefore also known as Sol III , ( TV : " Voyage of the Damned " ) though mainly to extraterrestrial cultures . By the 20th century , various incarnations of the Doctor , ( TV : " Twice Upon a Time " , " Partners in Crime " , " The Eleventh Hour " ) as well as Romana ( TV : " City of Death " ) and Captain Hardaker ( TV : " Voyage of the Damned " ) referred to Earth as a " Level 5 planet " . It was a planet in which the the Doctor had a " particular interest " ( TV : " The War Games " ) and may even have been the origin of some of the Doctor ' s DNA . ( TV : " Doctor Who " ) Certainly , it was the planet from which the Doctor drew most of their travelling companions . It was also a planet about whose complete history the Doctor had demonstrated expertise , often knowing minutiae about it and being able to sense which points in its history and in its solar system ' s history were able to be altered , and which not . ( TV : " The Waters of Mars " ) The Fourth Doctor once referred to it as his " home from home " , ( AUDIO : " The Devil ' s Armada " ) as did the First . He found that something about the planet always cheered him up . ( PROSE : " The Rag & Bone Man ' s Story " ) Although the Twelfth Doctor for a time claimed that the Earth wasn ' t his home , ( TV : " Kill the Moon " ) he later admitted that " [ t ] his [ was his ] world too . " ( TV : " In the Forest of the Night " ) It attracted many alien invasion attempts throughout its multi - billion year history . Indeed , it owed its very existence to a species that hadn ' t originated there . Its core was formed around a Racnoss webstar , which provided the necessary gravitational pull to coalesce the planet from nearby matter . ( TV : " The Runaway Bride " ) Still , it was not a planet that was merely ripe for invasion . Its history included long periods of time where it was a formidable player in intergalactic politics . At the height of its influence , Earth was the centre of several massive empires and confederations , and its DNA was flung to the furthest reaches of the universe . ( TV : " Frontier in Space " , " The Monster of Peladon " , " Utopia " , " The Long Game " , " Planet of the Ood " ) Astronomical data . Location . Earth was located at galactic coordinates 58044 684884 ( TV : " The Pirate Planet " ) in Sector 8023 of the Third Quadrant . ( TV : " Logopolis " ) It was 149 , 600 , 000 kilometres away from the Sun . ( COMIC : " The Hyperion Empire " ) It was the third planet in the solar system . ( TV : " The Deadly Assassin " , " Last of the Time Lords " , " Voyage of the Damned " ) At one point the planet was transported to the Medusa Cascade by the Dalek s , ( TV : " The Stolen Earth " ) and was subsequently towed back to its normal orbit in the Solar system by the TARDIS . ( TV : " Journey ' s End " ) It was later shifted two light years from this position by the Time Lord s and renamed Ravolox circa 2 , 000 , 000 AD . At some point it was returned to its original location . ( TV : " The Mysterious Planet " ) Moon ( s ) . For much of Earth ' s history until 2049 , a planetoid - sized egg was a satellite of Earth . This egg , known as the Moon , impacted the Earth ' s tides and eventually hatched in 2049 . The creature replaced the Moon ' s position with a " new moon " - equal in size to the original - when it laid another egg shortly after hatching . ( TV : " Kill the Moon " ) By the time of the Fourth Great and Bountiful Human Empire , the Earth had five moons . ( TV : " The Long Game " ) Geology . Earth was rich in many valuable metals and elements . ( PROSE : " Doctor Who and the Day of the Daleks " ) It was one of the few sources of quartz in the galaxy ( TV : " The Pirate Planet " ) and was also rich in silicon and carbon . ( TV : " Four to Doomsday " ) The planet was not entirely spherical , which meant that Shanghai and Buenos Aires , while technically antipode s , were slightly off . The Blessing ran through the Earth between those two points . ( TV : " The Blood Line " ) Atmosphere and gravity . Earth ' s atmosphere was 80 % nitrogen and 20 % oxygen . ( AUDIO : " The Resurrection of Mars " ) Carbon dioxide was vital to Earth ' s lower atmosphere . ( TV : " The Ice Warriors " ) Due to human activity , Earth had a lot of toxin s and dioxin s in its atmosphere , which would have provided decent nutrition for the Nestene Consciousness . ( TV : " Rose " ) The First Doctor noted that Earth ' s atmosphere and gravity were roughly equivalent to those on Gallifrey . ( PROSE : " The Rag & Bone Man ' s Story " ) As the Third Doctor noted , with the invention of the motor car came a change in Earth ' s atmosphere . ( TV : " Colony in Space " ) As cars admitted excess carbon dioxide into the atmosphere , causing pollution , they were fitted with ATMOS in the 2009 , and didn ' t emit any at all . What they did add to the atmosphere , though , was clone feed , as it was the Sontaran s ' plan to convert Earth into a cloning world . This was reversed by the Tenth Doctor and Luke Rattigan , who used an atmospheric converter to clean up the atmosphere again . ( TV : " The Sontaran Stratagem " , " The Poison Sky " ) Geography . Earth ' s surface changed considerably over the course of its long history , owing to its high seismic activity . When native life first appeared on the planet , for example , what later became the middle of the Atlantic Ocean was a vast , rocky wasteland . ( TV : " City of Death " ) What follows is a general description of what came to be known as " Classic Earth " . ( TV : " The End of the World ) " The actions of humans , specifically their pollution , also had a major effect on the geography of the world . By the 26th century , the seas of Earth had been polluted , irradiated , set on fire and boiled off into a thick sludge . ( PROSE : " Ship of Fools " ) By the 52nd century , winters never occurred due to global warming . ( PROSE : " The Frozen " ) However , in the days of the Second Great and Bountiful Human Empire , the Earth was far less polluted than in the twentieth century . ( TV : " The Daleks ' Master Plan " ) Over millions of years , continental drift caused the surface of Earth to change radically , creating such features as the Arctic Desert and the Los Angeles Crevasse . After the 57th Segment of Time and the events of the Ark , the National Trust installed gravity satellite s to hold back the expanding Sun , from a now uninhabited Earth . They also shifted the continents back to their earlier positions , a planetary style known as " Classic Earth " , which took billions of years . It stayed like this until the planet ' s final destruction in the year 5 . 5 / Apple / 26 . ( TV : " The End of the World " ) Sapient native species . Several sapient and semi - sapient species evolved on Earth , though the most important and influential ones were the human s and Earth Reptile s , known as Silurians . ( PROSE : " Love and War " , TV : " Cold Blood " ) Other sapient species native to Earth included the Fairies ( TV : " Small Worlds " ) , Sidhe ( PROSE : " Autumn Mist " ) , the dolphin s ( PROSE : " Island of Death " ) , the Carpanthan s ( COMIC : " The Fishmen of Carpantha " ) , the Mermen ( COMIC : " Guests of King Neptune " AUDIO : " Cryptobiosis " ) , the Tusken s ( PROSE : " Mad Dogs and Englishmen " ) and the Erithian s ( AUDIO : " The Caves of Erith " ) . Flora and fauna . In its long history , many species had evolved on Earth . By the 21st century , over three hundred billion species of animals had already evolved and gone extinct . ( PROSE : " The Last Dodo " ) The Fourth Doctor stated that Earth was the only planet in its galaxy where oak trees grew . ( TV : " The Android Invasion " ) Historical significance . Early history . Before life . Following Rassilon ' s Eternal War against the Yssgaroth , ( PROSE : " The Pit " , TV : " State of Decay " ) the Time Lord s tracked down all the openings to the Yssgaroth ' s universe and closed them off with containment shells disguised as planet s . ( PROSE : " Interference - Book One " , " The Book of the War " ) The Earth was one of these . ( PROSE : " The Book of the War " ) According to another account , Earth formed circa 4 . 6 billion years BC around a Racnoss spacecraft which carried the last of their ancient race . The craft drew in surrounding asteroids and shaped them into a planetary body . ( TV : " The Runaway Bride " ) Soon afterwards , the Eleventh Doctor arrived on a Tuesday , in what he described as " 6 billion years ago . " At that time , the Earth was hot and volcanic . ( TV : " Hide " ) Around 3 billion BC , the consciousness of the Sou ( ou ) shi settled on Earth and went into dormancy . ( PROSE : " Venusian Lullaby " ) At much the same time , the Sentience was also trapped in the forming Earth . ( PROSE : " Nightshade " ) Creation of life . Native life eventually developed due to the explosion of a Jagaroth spaceship circa 400 million BC , ( TV : " City of Death " ) the experiments of the Archaeon s using red lightning to seed the Earth and turn it into an ordered " garden " circa 450 million BC , ( AUDIO : " The Beginning " ) or both . Dinosaurs , Silurians and Sea Devils . Various species of saurian creatures dominated the planet until circa 65 million BC , when a freighter from 2526 time - warped to this period and exploded in the upper atmosphere . The resulting clouds of dirt and smoke obscured the Sun , lowering the temperature and causing mass extinctions . ( TV : " Earthshock " ) An intelligent species of reptile s flourished and then went extinct . ( PROSE : " All - Consuming Fire " ) Reptilian Silurian s ( TV : " Doctor Who and the Silurians " ) and Sea Devil s ( TV : " The Sea Devils " ) were also active , and were the dominant species on Earth . During this time , the red leech also existed and was the Silurians ' most virulent enemy . They were believed to have gone extinct during this period , but at least one survived to the year 1893 . ( TV : " The Crimson Horror " ) The reign of the Silurians and Sea Devils came to a final end when the small planet ( later known as Earth ' s primary satellite , the Moon ) entered Earth ' s orbit . ( TV : " Doctor Who and the Silurians " ) Some of the reptilian scientists , such as Dr Wolik , calculated that the Moon would closely approach Earth , drawing off the atmosphere ( PROSE : " Doctor Who and the Cave - Monsters " , COMIC : " Twilight of the Silurians " ) and destroying " all life " . ( TV : " Doctor Who and the Silurians " ) The Third Doctor repeated the claim to Marc Marshall that the Silurians built the shelters when they thought the planet would " suck away " Earth ' s atmosphere as it rushed by . ( PROSE : " The Scales of Injustice " ) Conversely , the Fifth Doctor recalled that the Silurian astronomers predicted that Earth was about to be " struck " by the planet at the time , ( PROSE : " Warriors of the Deep " ) and the Eleventh Doctor described the trajectory of the planet the astronomers had predicted as a " crash course " . ( TV : " Cold Blood " ) The reptiles went into suspended animation until the atmosphere returned . Because the atmosphere never went away , they stayed in hibernation for millions of years . ( TV : " Doctor Who and the Silurians " ) Nonetheless , the effects of the Moon ' s arrival , while never completely pulling the atmosphere away , caused huge tidal wave s to sweep over its continents , volcano es to erupt , earthquake s bringing mountains down and cyclone s to rage across the planet . Millions of human ity ' s ape ancestors drowned or were blown into rocks by the winds , but some survived and multiplied . ( PROSE : " Doctor Who and the Cave - Monsters " ) During millions of years of hibernation , the reactivation machinery of the reptiles ' hibernation unit s deteriorated . ( TV : " The Sea Devils " ) One account implied that the Moon was already in orbit before intelligent life had developed , ( AUDIO : " The Beginning " ) while another stated that it was an egg laid by an alien species around 100 million BC . ( TV : " Kill the Moon " ) Apes , regarded by the reptiles as pests , eventually evolved into the species known as humans , given a substantial jolt forward when the Fendahl Core arrived in Africa circa 12 million BC . ( TV : " Image of the Fendahl " ) Human age . Rise of human civilisation . Human civilisation evolved quickly , assisted ( either accidentally or directly ) by the Dæmon s , ( TV : " The Dæmons " ) the various temporal fragments of Scaroth , ( TV : " City of Death " ) the predatory nature imparted to humans by the Fendahl , ( TV : " Image of the Fendahl " ) and the occupation by the Silence . ( TV : " Day of the Moon " ) Scaroth claimed responsibility for the inventions of fire and the wheel ; ( TV : " City of Death " ) the Silent s claimed they were on Earth since that point . ( TV : " Day of the Moon " ) The Osiran s apparently had an influence on Earth around 5000 BC , inspiring many aspects of Ancient Egypt and imprisoning one of their number , Sutekh , in Egypt . ( TV : " Pyramids of Mars " ) The Third Doctor said that the Dæmons helped " Homo sapiens " " kick out " Neanderthal man . He mentioned the Greek civilisation , the Renaissance , the Industrial Revolution , and various myths , gods and devils including Khnum and the Horned Beast as being inspired by the Dæmons . ( TV : " The Dæmons " ) For " a half a million years " , humanity systematically killed one another in conflicts . ( TV : " The War Games " ) Human beings ' predatory and aggressive nature was evident in the many conflicts which humans fought amongst themselves throughout much of their early history , such as during the siege of Troy , the Dark Ages and the American War of Independence . ( TV : " The Mark of the Rani " ) Other conflicts , including World War I , the English Civil War , the American Civil War , the Mexican Civil War , the Crimean War , the Boer War , the Russo - Japanese War , the Thirty Years ' War and the Peninsular War were also exploited by the War Lord s , who kidnapped human soldiers from these various conflicts in Earth history for use in their war games . ( TV : " The War Games " ) 20th and 21st centuries . The First Doctor ' s companion Vicki Pallister , who was from the 25th century , did not consider early 20th century Earth to be much more advanced than Rome in the 1st century . Barbara Wright took offence at this remark . ( AUDIO : " Starborn " ) The conflicts known as the First and Second World Wars and the Cold War would be particularly significant in the 20th century . The development of nuclear weapon s increased international tensions in the late 20th century even more . In the 1980s nuclear war between the Soviet Union and the United States seemed imminent . ( TV : " Cold War " ) This threat was somewhat alleviated when the great powers entrusted their nuclear launch codes to the United Kingdom for safe - keeping ( TV : " Robot " ) , and again when the planet came under the rule of the World Zone Authority in the early 21st century . ( TV : " The Enemy of the World " ) In July 1969 , the Eleventh Doctor made the humans subconsciously turn against the Silence and drove them off the planet , leaving behind their network of underground tunnels and several of their crafts . It was at this time that humans sent their first people on the Moon . ( TV : " Day of the Moon " ) Scaroth was killed in 1979 . ( TV : " City of Death " ) The space race , partially inspired by the Silence , ( TV : " Day of the Moon " ) was of great significance : while Earth had been visited by aliens many times throughout its history , the launching of space probes made such visits more frequent , as " Homo sapiens " began drawing attention to themselves . ( TV : " Spearhead from Space " ) These visits also tended to be more openly hostile . Earth was saved from conquest or outright annihilation often only through the intercession of the Doctor or the secret ( prior to the 21st century ) organisation Torchwood . An attack by the Great Intelligence would finally force the Earth ' s governments to agree on a unified response to aliens : the United Nations body known as UNIT . ( TV : " The Web of Fear " , " The Invasion " ) Despite this increase in invasions , a number of aliens that arrived were benevolent . The governments of Earth , as well as the Doctor , UNIT , Torchwood , and ( by the 21st century ) Sarah Jane Smith and her Ealing group , tried to keep these invasions a secret . UNIT was officially a counter - terrorist group and had several incidents explained as terrorism and accidents , though this caused political scandals throughout the 1970s . ( PROSE : " Who Killed Kennedy " ) Torchwood used mind - wiping drugs to cover up some incidents , ( TV : " Everything Changes " ) while Sarah Jane used her computer Mr Smith to deliberately falsify evidence and news reports . ( TV : " Revenge of the Slitheen " , TV : " The End of Time " ) The Seventh Doctor would remark that these cover - ups were helped by the fact humans didn ' t " want " to notice , and were performing self - deception on themselves . ( TV : " Remembrance of the Daleks " ) In the early 21st century , starting with the Slitheen infiltration of 10 Downing Street ( TV : " Aliens of London " ) , alien incidents became far more blatant . The governments and UNIT would have a random policy of alternately admitting that some aliens existed ( TV : " The Christmas Invasion " , " The Sound of Drums " , AUDIO : " The Coup " ) and trying to desperately cover things up , such as claiming the Battle of Canary Wharf was because of terrorists planting drugs in water . ( TV : " Everything Changes " ) Many humans acknowledged the aliens , while others tried to claim they were fake . ( TV : " Smith and Jones " ) However , several further events , most notably the forced relocation of Earth and a global Dalek assault ( TV : " The Stolen Earth " / " Journey ' s End " ) and the 456 crisis ( TV : " Children of Earth " ) served to finally convince the populace at large that humanity was not alone in the universe . Subsequent events , however , in particular the manifestation of the Time Field , removed some of these events from the memories of many , if not all humans ; ( TV : " Flesh and Stone " , " The Big Bang " ) the Doctor ultimately rebooted the universe and Earth ' s history . ( TV : " The Big Bang " ) In 2011 , Earth ' s political and social climate changed heavily following Miracle Day , where the human race stopped dying as a result of a morphic field and yet continued to age . ( TV : " The New World " , " Rendition " ) This ended when Jack Harkness ' blood was fed into the Blessing ' s antipodes . ( TV : " The Blood Line " ) As a result , some countries like India and Pakistan reduced tensions with one another , while others like North Korea started mobilising troops and the legal definition and practical use of attempted murder and suicide were thrown into chaos . ( TV : " The New World " , " Rendition " , " The Categories of Life " , " The Middle Men " ) Various governments established the categories of life , throwing category 1s and 2s into overflow camp s and incinerating category 1s inside Module s . ( TV : " The Categories of Life " ) This quickly became public knowledge . ( TV : " The Middle Men " ) From 2019 to at least 2059 , Earth went through a period of chaos : climate change , ozone degradation , the " oil apocalypse " , the Great Cataclysm , a Korven invasion ( TV : " The Waters of Mars " , " The Eclipse of the Korven " ) and the increased weight of the Moon causing high tide everywhere all at once . ( TV : " Kill the Moon " ) Humanity faced extinction , but not only survived , they achieved major advances in space travel ( TV : " The Waters of Mars " ) and developed weather control technology . ( TV : " The Moonbase " ) In 2058 , Earth ' s first colony on Mars was established by Adelaide Brooke ; ( TV : " The Waters of Mars " ) humanity would go on to create an early form of transmat ( TV : " The Seeds of Death " ) and lightspeed travel . ( TV : " The Waters of Mars " ) To cope with the depleted oil supply , humans began drilling offworld , taking oil from other planets . ( TV : " The Infinite Quest " ) In late 21st century , the United States of America and Eurozone began showing hostilities to each other ( PROSE : " Trading Futures " ) and by 2084 , there were again two vast power blocs in conflict and the threat of nuclear war . ( TV : " Warriors of the Deep " ) According to one account , the tensions between the competing blocs ended with the Martian assault of 2086 , when Paris was destroyed . A Thousand Day War against a common alien enemy united humans and planted the seeds for a united Earth . ( PROSE : " Transit " ) However , a different account showed that all of the Martians were either destroyed after — in the words of Harold — " something to do with T - Mat on the Moon " or were inactive and in suspended animation on Deimos and in the Sol system ' s asteroid belt . ( AUDIO : " Deimos " ) However , other accounts differed on this , stating that , among other things , Mars was entirely populated by human colonists by the 23rd century , with the native Martian s , the Ice Warrior s , already becoming — in the words of Ice Warrior expert , Professor Schooner — " extinct for hundreds of years " , when , according to what Gregson Grenville had learnt from school , " they were all melted when their invasion fleet spiralled into the sun " . This account showed extant Ice Warriors , but all were in suspended animation for — according to the Eighth Doctor — " many millions of years " at the time both the destruction of the fleet and the Thousand Year War were purported to have happened . ( AUDIO : " Deimos " ) Humanity travels to the stars . In 2089 , Earth made its first interstellar flight which was flown by Susie Fontana Brooke and it lead her to Proxima Centauri . In 2095 a full - scale human colonisation of Mars began to be colonised for the wealthy minority humans . ( PROSE : " Beige Planet Mars " ) Four years later , the governments of Earth , in answer to global warming , had taken vast sections of the Arctic and Antarctic and placed them inside huge domes called Snowglobe s . ( PROSE : " Snowglobe 7 " ) In the 22nd century , Earth suffered the rise of large corporations which would occasionally wage active war against each other , energy crises and the collapse of the tourist trade . In 2156 , Earth Central declared bankruptcy and the corporations ( under the Earth Alliance of Corporations ) took control of the planet . Despite this , Earth ' s colonisation of the galaxy continued to advance . The Adjudicators were established to enforce Earth law on the colonies . ( PROSE : " Lucifer Rising " ) 22nd century Dalek invasion . The 22nd century Dalek invasion proved devastating to Earth . First , the Daleks wiped out fifteen colonies ; ( PROSE : " Lucifer Rising " ) next , they released a plague across the Earth . Over a six - month period , Africa , Asia and South America were almost wiped out ; humanity was barely able to resist when the Daleks arrived . ( TV : " The Dalek Invasion of Earth " ) New York City and many other cities were destroyed . ( TV : " The Chase " ) For ten years , the remaining inhabitants of earth were terrorised by the Dalek forces , who enslaved many and turned others into Robomen , while the Daleks attempted to turn Earth into a mobile dreadnought . Only a handful of resistance groups existed . Following the defeat of their grand scheme ( TV : " The Dalek Invasion of Earth " ) and the shattering of their solar system blockade in the Battle of Cassius , the Daleks left Earth . The planet remained divided into feudal kingdoms for a time , as Earth refused assistance from the colonies ; ( PROSE : " Legacy of the Daleks " ) large conglomerates , however , stepped in to rebuild the Terran Security Forces . ( PROSE : " The Final Sanction " ) The invasion killed about two - thirds of Earth ' s population . ( AUDIO : " An Earthly Child " ) Thirty years after the invasion , the Earth Council existed as a fledgling government , but anti - alien organisations like Earth United began to attract many youths to their cause . ( AUDIO : " An Earthly Child " ) Earth was finally rebuilt when other ships from other human colonies arrived to offer their aid . ( PROSE : " The Janus Conjunction " ) The Daleks , during the 2190s , invaded Earth again under the Leadership of the Dalek Time Controller , after the renegade Time Lord the Meddling Monk spread another virus . They dug up much of North America , hoping this time to move Earth through time and space for the viruses from the Amethyst Viral Containment Station , turning Earth into a plague planet . This plan was averted when Lucie Miller crashed a Dalek Saucer into the mines at the cost of her life . ( AUDIO : " Lucie Miller " / " To the Death " ) Earth empires . By the 23rd century , Earth had recovered and a major " break - out " of colonisation took place . ( PROSE : " The Romance of Crime " ) In time the planet formed a unified government and an Earth Empire emerged . This dominated most of Mutter ' s Spiral for over 500 years . This empire at times came into military conflict with other space powers , particularly the Draconian s , ( TV : " Frontier in Space " ) Cybermen ( TV : " Earthshock " ) and the Korven . ( TV : " The Korven " ) It often employed oppressive and disenfranchising policies on the indigenous inhabitants of its colonies . ( TV : " The Power of Kroll " , " The Mutants " ) Alongside Draconia , Earth would fight and win the Second Dalek War . Before the war , Earth and the Empire was overseen by a president , ( TV : " Frontier in Space " ) but from the late 26th century it was ruled by a Divine Empress . ( PROSE : " Cold Fusion " ) Unrest among the subjugated alien races , instabilities in the Empire ' s political and economic structure , and ecological damage to Earth eventually led to the dissolution of the Empire , ( TV : " The Mutants " , PROSE : " The Sorcerer ' s Apprentice " ) which in time gave way to the Galactic Federation , headquartered on Io . ( PROSE : " Legacy " ) By the 28th century , Earth was commonly referred to as " Old Earth " by the inhabitants of its colonies such as Nocturne . ( AUDIO : " Nocturne " ) In the 29th century , Earth ' s environment was largely destroyed by solar flares . Humanity fled the planet on giant spaceships , returning when the solar flares stabilised . Autonomous nations returned during the crisis , as countries like the United Kingdom constructed their own , specific refuge ships . ( TV : " The Beast Below " ) According to one account , humanity was still travelling on refuge ships by the 33rd century . ( TV : " The Beast Below " ) According to another account , the Kustollon Igrix recalled that in 3046 , the Kustollons of Kustollia fought the humans of Earth in an " enormous , terrible battle " over disputed territories in the Perseus arm . The humans won using a virus developed from Peter and Charlotte Cobb ' s research which disabled the Kustollons ' biotechnology . According to the Ninth Doctor , Earth had collapsed and took centuries to recover from famine , plague and misery . ( COMIC : " The Love Invasion " ) By 4000 , Earth and its dominions were ruled by a Guardian of the Solar System , with the Space Security Service handling military intelligence . Following the death of the incumbent Guardian , Mavic Chen , ( TV : " The Daleks ' Master Plan " ) however , his descendants brought down the Galactic Federation ' s democracy ( PROSE : " The Crystal Bucephalus " ) and the Earth - ruled Second Great and Bountiful Human Empire took its place . During this time the enslavement of the Ood as a servant class occurred . ( TV : " Planet of the Ood " ) The Empire was succeeded by the Earth Alliance . ( AUDIO : " Invasion of the Daleks " ) However , the brutal Dalek invasion of 4162 ( AUDIO : " Dalek Empire I " ) saw Earth conquered and occupied by Daleks once again and would result in the Great Catastrophe that devastated Earth and its colonies . ( AUDIO : " Dalek Empire II " ) Earth recovered yet again , forming advanced national alliances before a new Ice Age and World War VI struck it in the 51st century . However , it still triggered the Great Breakout of space colonisation and created the Time Agency . ( TV : " The Talons of Weng - Chiang " , " The Invisible Enemy " ) Later events . Earth , in its later history , was abandoned numerous times by its human inhabitants , first in 6087 when solar flare s bombarded the planet , leaving Earth uninhabited for 10 , 000 years . ( TV : " The Ark in Space " ) The population of Earth was evacuated in vast starships , while a small number of people were left behind aboard Nerva Beacon to begin the repopulation of the planet once conditions on the surface were suitable for life . Humans elsewhere carried on with another period of colonial expansion under GalSec . ( TV : " The Ark in Space " , " The Sontaran Experiment " ) While Earth was uninhabited and damaged , it was occupied by the Charrl , who renamed the world Antýkhon . Humans who had survived the flares , referred to as " Hairies " , had mutated to adapt to the depleted atmosphere and soil caused by the Charrls ' industrial activities . The Charrl occupation lasted some 3 , 497 years . ( PROSE : " Birthright " ) Nerva Beacon ' s evacuees returned to Earth after ten thousand years had passed . They recolonised the planet . ( TV : " The Ark in Space " ) According to one account , by the year 37 , 166 , Earth had been abandoned " since the start of the third era " . ( PROSE : " Doctor Who and the Planet of Evil " ) Some time after , Earth was visited by the Usurian s , who relocated the dying human population first to Mars and then Pluto . Generations later , humans had thrown off the yoke of Usurian exploitation and returned to Earth . ( TV : " The Sun Makers " ) By the year 200 , 000 , Earth was at its height , covered with megacities and a population of 96 billion . It was the centre of the galactic domain of the Fourth Great and Bountiful Human Empire that stretched across a million planets and species . The Empire had been secretly manipulated and its progress hindered by Dalek survivors of the Last Great Time War , who allowed an alien known as the Jagrafess and his consort , the Editor , control over the planet until they were caught and overthrown . ( TV : " The Long Game " , " Bad Wolf " , " The Parting of the Ways " ) Earth underwent a century of social collapse and pollution before a full - scale invasion commenced in 200 , 100 , including a bombing campaign which disfigured the continents . The Dalek fleet was destroyed by the Bad Wolf entity . ( TV : " The Parting of the Ways " ) About the year 2 , 000 , 000 , Earth was relocated two light - years from its proper position by the Time Lord s to prevent the escape of aliens from the constellation of Andromeda who had stolen information from the Matrix on Gallifrey . Most of the humans remaining on Earth were wiped out . Those that survived degenerated to a primitive , tribal culture . The planet came to be known as Ravolox , with Earth being completely forgotten . The inhabitants of Ravolox eventually came to know of the true nature and history of their planet and to rebuild their civilisation . ( TV : " The Mysterious Planet " ) The prophecy of the Vampire Messiah also used the name Ravolox for Earth . ( PROSE : " Goth Opera " ) . At some point , the planet was known by the name Tellus and was owned entirely by the mining company , Tellac Inc . During this period , the president of the company was the political leader of the planet as well . ( PROSE : " K9 and the Missing Planet " ) At some point in the far future , Earth was a dead planet , ( AUDIO : " Voyage to Venus " ) destroyed and " laid barren by wanton waste and foolhardy destruction " . ( PROSE : " The Gallery " ) Earth ' s destruction . In the 57th segment of Time , the last humans left Earth because of the increasing danger that it would fall into the Sun , fleeing to planet s such as Refusis II and Frontios . ( TV : " The Ark " , " Frontios " ) The now uninhabited Earth was preserved by the National Trust . Over the following billions of years it was restored to a " classic " Earth , during which time the Sun exhausted its hydrogen supply and turned into a red giant . As it grew , the National Trust financed technology to keep its expansion held back so the Sun would not engulf the Earth . However , funding for the preservation project eventually ran out and the National trust withdrew its protection . Earth was finally destroyed by the expanding Sun ( TV : " The End of the World " ) in the year 5 , 000 , 000 , 000 . ( TV : " New Earth " ) However , at some point , humanity had settled on a planet called New Earth , which had a similar size , orbit , and atmosphere to Earth . According to one account , humanity had relocated to New Earth long before the destruction of Earth . ( COMIC : " Agent Provocateur " ) According to another account , the Tenth Doctor said that in 5 , 000 , 000 , 000 , " as soon as the Earth burn [ t ] up " , the human race , who at this point were " spread out across the stars " , got nostalgic and then " found " New Earth after forming a big revival movement . ( TV : " New Earth " ) Humanity outlived their original homeworld for tens of trillions of years , at least up until the end of the universe itself . ( TV : " Utopia " , " Kill the Moon " ) Alternate timelines . Earth experienced various alternate timeline s . In one timeline , the Dalek s found the Eye of Time , invaded Earth in 1963 and wiped out humanity . This timeline was averted by the Eleventh Doctor and Amy Pond , by preventing the Daleks from resurrecting their Emperor along with the rest of Skaro and launching the attack in the first place . ( GAME : " City of the Daleks " ) On one occasion , guerilla fighters from an alternate timeline of 22nd century Earth attempted to prevent their own future and instead caused it . Shura bombed Auderly House where Sir Reginald Styles was holding the second World Peace Conference , vital to preventing World War III . As a result , many world leaders were killed and a series of wars devastated the planet , killing seven - eighths of the population . By the 22nd century , the Earth was under the rule of the Dalek s . After travelling to this future , the Third Doctor and Jo Grant pieced together what had actually happened to cause the future which had previously been blamed upon Styles . After being informed of the truth , Shura sacrificed himself to blow up a Dalek attack force once Auderly House was emptied , changing the future . ( TV : " Day of the Daleks " ) On another occasion , the release of Sutekh in 1911 meant that by 1980 the Earth would become a desolate planet circling a dead sun . The Fourth Doctor showed this to Sarah Jane Smith , and by causing Sutekh to age to death before he could escape , this timeline was averted . ( TV : " Pyramids of Mars " ) In another alternative timeline created by the Elder Gods in the hope of destroying Earth , Vladimir Kryuchkov became the General Secretary of the Communist Party of the Soviet Union instead of Mikhail Gorbachev in 1985 . On 9 November 1989 , World War III broke out between the United States and its allies including the United Kingdom on the one hand and the Soviet Union on the other hand . Given that nuclear weapon s were used by both sides , hundreds of millions of people were killed in the conflict . This timeline was ultimately negated by the Seventh Doctor except for in a pocket universe where the Doctor trapped the two Elder Gods responsible and , accidentally , his companions Ace and Hex . ( AUDIO : " Protect and Survive " ) In an alternate timeline , the Earth was a polluted world covered in a chemical slime . From this world sprang the haemovore s with the Ancient One being the last by the year 500 , 000 . After Fenric brought the Ancient One to 1943 Earth , he attempted to get the Ancient One to fill the oceans with poison which would create this future . The Seventh Doctor convinced the Ancient One of the truth and it sacrificed itself to defeat Fenric and change its future . ( TV : " The Curse of Fenric " ) After becoming Prime Minister , the incarnation of the Master orchestrated the Toclafane invasion , decimating the human population of the Earth and putting the planet under his rule to use as a stepping stone to take over the universe . Within a year , the Earth was quarantined by the rest of the universe as going through " terminal extinction . " After the defeat of the Master thanks to the efforts of Martha Jones , Captain Jack Harkness and the Tenth Doctor , this timeline was reverted and became known as The Year That Never Was . Only those on the " Valiant " when time was reversed would ever know of these events . ( TV : " The Sound of Drums " , " Last of the Time Lords " ) When a member of the Trickster ' s Brigade made Donna Noble change a seemingly small decision in her life , it resulted in an alternate timeline where the Doctor had died on Christmas , 2007 . Because of this , many deaths occurred that he would have otherwise stopped . These deaths included most of the population of London when a spaceship replica of the Titanic crashed into the city . The timeline was put back to rights after Rose Tyler , with the help of UNIT , sent Donna back in time to ensure she made the decision to turn left instead of right and take a job at H . C . Clements . ( TV : " Turn Left " ) The Kovarian Chapter of the Silence ( TV : " The Time of the Doctor " ) exploding the TARDIS in 2010 led to the collapse of the universe , with Earth ' s history being barely held together by the TARDIS as it exploded throughout history . The Doctor was able to reboot the universe by flying the Pandorica into the exploding TARDIS . ( TV : " The Pandorica Opens " / " The Big Bang " ) When River Song refused to shoot the Eleventh Doctor at Lake Silencio on 22 April 2011 , a fixed point in time , time collapsed , creating a timeline where all of history was happening at once . The Doctor revealed to River he was really miniaturised and hiding inside an android replica of himself , causing her to perform the shooting and abort this timeline . ( TV : " The Wedding of River Song " ) Culture . Human culture was highly diverse . Natives of the Earth used a wide variety of languages , including Latin , ( TV : The Fires of Pompeii ) Greek and Hebrew ( PROSE : " Byzantium ! " ) in the ancient times and English , ( TV : " The Two Doctors " ) Mandarin ( TV : " " ) and Russian ( TV : " Cold War " ) in the 20th and 21st centuries . Some of the Earth languages were later used on other worlds too , for example Hebrew was spoken on the human colony of Ha ' olam . ( PROSE : " Dreamstone Moon " ) The Earth was home to many influential human artists , such as Leonardo da Vinci ( TV : " City of Death " ) and Vincent van Gogh . ( TV : " Vincent and the Doctor " ) Influential Earth music ians included Ludwig van Beethoven , ( PROSE : " Gone Too Soon " ) Wolfgang Amadeus Mozart , ( AUDIO : " My Own Private Wolfgang " ) and the Beatles . ( AUDIO : " " ) Religions . Diverse deities were worshipped on the planet . The ancient Roman s worshipped several god s , including Vulcan and Venus . ( TV : " The Fires of Pompeii " ) Some Earth deities were in fact advanced beings from outer space , like the Osiran s and Olympian s worshipped by the Egyptians and Greeks respectively . Eventually however , these cults started to lose their influence because of the spread of Christianity . ( PROSE : " Byzantium ! " ) Without specifying the species , the Tenth Doctor said that Earth , like a million other worlds " right across the universe " , had " the representation of the horned beast " in its myths and legends . The Beast claimed to be this " devil " , along with all of the others in every religion which had such a figure . ( TV : " The Satan Pit " ) Politics . In its early period , the Earth lacked a united planetary government , being organised into nation - states instead . ( TV : " The Sontaran Stratagem " ) Many of those societies were ruled by king s , like Ur ( PROSE : " Happy Endings " ) , Macedon ( AUDIO : " Mask of Tragedy " ) of the ancient era , France in the 18th century ( TV : " The Girl in the Fireplace " ) and England well into the 21st . ( PROSE : " Revenge of the Judoon " ) Other forms of government , like that of the United States of America , which was led by a President , were however by no means unknown . ( AUDIO : " The Eye of the Scorpion " ) Earth was finally unified into a world state after the Thousand Day War against the Ice Warrior s in the late 21st century . A brief relapse into warring feudal states followed the Dalek occupation before the Earth was again united . ( PROSE : " Legacy of the Daleks " ) It was also around this time that Earth formed the Alliance with Alpha Centauri and other nearby systems , its first formal alliance with alien species . ( PROSE : " Original Sin " , " Lords of the Storm " ) The united Earth government quickly became corrupt and on the payroll of powerful financial concerns like INITEC , the Galatron Mining Corporation , the AMORB Project and especially IMC , looking the other way as these organisations victimised indigenous species and human colonists alike on the outer worlds . ( TV : " Vengeance on Varos " , " Colony in Space " ) In time the business policies of these corporations and the political and diplomatic policies of the Earth government became parallel and laid the foundations for the Earth Empire . Law and order was enforced by the Adjudicator s . Although Earth was governed by a democratically elected leader , civil liberties in the mid - third millennium were marginalized and critics of the government were frequently sent to the Moon , which was converted from a civilian colony to a prison . ( TV : " Frontier in Space " ) In the last centuries of the third millennium , the Republic became an Imperial monarchy , with the Holy King ( or Queen ) ruling Earth and its empire . The last Holy Monarch left control of the Earth to a ruling council upon her death , shortly before the Solos Incident . ( PROSE : " Original Sin " , TV : " The Mutants " ) With the advent of the Second Ice Age and continuing unrest among the colonies , Earth ' s government collapsed at the turn of the fourth millennium . Feudalism returned on the planet and on many of its colonies . An aristocratic government remained in control of Earth when the Galactic Federation was formed in the later years of the millennium . ( TV : " The Curse of Peladon " ) This aristocracy gradually gave way to more democratic forms , but this new era of freedom was short - lived as the Solar System came under the sway of the Chen Dynasty after 4000 . ( TV : " The Daleks ' Master Plan " , PROSE : " The Crystal Bucephalus " ) By 4126 , Earth was the centre of the Second Great and Bountiful Human Empire , a vast and powerful tri - galactic power . Ood slavery was common and accepted during this period . ( TV : " Planet of the Ood " ) By 4162 , however , it had been replaced by the Earth Alliance , a powerful Earth - centred bloc . This was the main power fighting another Dalek invasion of the galaxy , ( AUDIO : " Invasion of the Daleks " ) though Earth " itself " was conquered for much of the war . ( AUDIO : " " ) When it was liberated , it became a victim of the Great Catastrophe . ( AUDIO : " " ) After this , the nations of the Earth became completely independent once more . A Sixth World War loomed by the year 5000 between the superpowers of the Icelandic Alliance and Supreme Alliance . This ended with the Supreme Alliance victorious and Iceland occupied . Other important nations at the time included the Commonwealth of Australia , which itself was occupied and the Philippines , which liberated Iceland and defeated the Supreme Alliance . ( TV : " The Talons of Weng - Chiang " ) At the same time , Earth was responsible for a new period of space exploration and colonisation . ( TV : " The Invisible Enemy " ) By the 100th century , the Earth was facing civil wars and by the 102nd century it was reformed into the Junta . ( PROSE : " Synthespians™ " ) Information on what forms of government existed on Earth during its later periods was scant , owing to the frequent evacuations and resettlements by humanity which occurred . During Earth ' s period as the planet Ravolox , the few surviving humans there appeared to live in a tribal matriarchy somewhat similar to that of the ancient Celt s . ( TV : " The Mysterious Planet " ) Economy . Variations of capitalism and communism were practised by Earth human s in the 20th century ( PROSE : " History 101 " ) . From the 20th to at least the 40th centuries , much of Earth ' s economy was dependent on oil , a non - renewable resource , much to the annoyance of the Fourth Doctor . ( TV : " Terror of the Zygons " , " The Infinite Quest " ) In 2008 , the Earth entered recession . Three years later , the Earth ' s economy spiralled further following the Miracle , leaving Ireland and Greece bankrupt . ( TV : " End of the Road " , " The Gathering " ) Towards the end of Earth ' s history , trees which traced their ancestry to the tropical rainforests had acquired sizeable fortunes , mostly in real estate . ( TV : " The End of the World " ) Place in the universe . The First Doctor was unfamiliar with Earth prior to his departure on Gallifrey . However , his granddaughter Susan Foreman had learned of its existence and that of the solar system in her spatial cartography lessons . ( AUDIO : " The Beginning " ) Earth was the target for many alien invasion s . The conquest of the planet was often for one of three reasons : The Sontaran invasion of Earth , as well as a previous claim to the planet , were motivated by the actions of the Rutan - Sontaran War . ( TV : " The Sontaran Stratagem " / " The Poison Sky " , " The Time Warrior " ) The Nimon sought control of Earth due to its position in space allowing for multiple expansions in their Great Journey of Life . ( AUDIO : " Seasons of Fear " ) There were invasions more subtle than a direct military action . Some time before 2050 , a Korven known as Lomax hijacked the British government and ruled over Great Britain . He also used the British government to gain control of many other parts of the world . Those under the British Government ' s control lived under a corrupt , totalitarian regime . Lomax and his subordinates were killed during their invasion attempt . ( TV : " The Eclipse of the Korven " ) Species that planned on turning Earth into their " New . . . " planets included the Zygon s ( TV : " Terror of the Zygons " , PROSE : " Sting of the Zygons " ) , the Cybermen ( TV : " Silver Nemesis " ) , the Nestene Consciousness ( TV : " Rose " ) , the Dalek s ( TV : " Evolution of the Daleks " ) , the Pyrovile s ( TV : " The Fires of Pompeii " ) and the Saturnyn s . ( TV : " The Vampires of Venice " )