2050 2050 was a year of great activity on the planet Earth , much of which involved K9 Mark 2 and his friends , and its moon . In 2009 , Rick Yates noted a projection that the global population would reach nine billion by this year , a two and a half billion rise . ( TV : " " ) The Seventh Doctor and Ace visited Prague . ( PROSE : " Fable Fusion " ) The Eleventh Doctor and Amy Pond attended the World Cup . ( COMIC : " Foul Play " ) The Moonbase was established to control Earth ' s weather via the Gravitron . ( TV : " The Moonbase " ) The tenth German moon mission took place . ( TV : " The Waters of Mars " ) Events in London . K9 followed four Jixen warriors through a Space - Time Manipulator and self - destructed to destroy them . ( TV : " Regeneration " ) The regenerated K9 decided to help Starkey , Jorjie Turner , Alistair Gryffen and Darius Pike with their many ordeals . ( TV : " Regeneration " ) K9 defeated the surviving Jixen and released all the aliens from Dauntless Prison . ( TV : " Liberation " ) K9 and his friends stopped a Korven soldier from the year 2618 from leeching Gryffen ' s brainwaves . ( TV : " The Korven " ) Ahab , a bounty hunter from the 50th century , travelled to this time to track down K9 . ( TV : " The Bounty Hunter " ) Inspector Drake ' s plan to use cerulium bracelet s to control London ' s population was foiled by K9 . ( TV : " Sirens of Ceres " ) Riots erupted in London due to an entity causing fear . ( TV : " Fear Itself " ) Alien ghosts assuming the form of Alistair Gryffen ' s family attacked K9 and his friends . ( TV : " The Fall o the House of Gryffen " ) K9 defeated Orthrus , a duplicate created by Drake to frame him . ( TV : " Jaws of Orthrus " ) The Bodach caused the citizens of London to fall asleep and dream so they could feed on their nightmares . ( TV : " Dream - Eaters " ) An Anubian invasion of Earth was foiled by K9 . ( TV : " Curse of Anubis " ) The Oroborus consumed pieces of the timeline but was defeated by Starkey . ( TV : " Oroborus " ) K9 helped the Mede s leave Earth . ( TV : " Alien Avatar " ) London was bombarded by soundwaves caused by a surviving Aeolian looking for her mate . ( TV : " Aeolian " ) A mother Centuripede stole Major Oak , the last surviving oak tree in England . She and her young were saved by K9 . In gratitude , she gave him three acorn s from the tree before she left Earth . ( TV : " The Last Oak Tree " ) After almost destroying Earth using the Hunger , Lomax replaced Drake with Thorne , his secret Meron convert operative . ( TV : " Black Hunger " ) K9 and his friends rescued Jorjie when she was sent to November 1963 . They also saved William Pike , preventing Darius from being erased from history . ( TV : " The Cambridge Spy " ) With the help of Ukkan librarian Yssaringintinka , K9 rescued Starkey from the barren planet of Urlic . ( TV : " Lost Library of Ukko " ) K9 helped Birdie , a CCPC implanted with human genetics , to hide from the Department . ( TV : " Mutant Copper " ) The last Etydion almost converted all of Britain ' s children into his kind but was stopped by June Turner . ( TV : " The Custodians " ) Taphony was rescued from her Department prison by Gryffen . ( TV : " Taphony and the Time Loop " ) K9 and the team shut down Crashclub , a company forcing old robots to fight . ( TV : " Robot Gladiators " ) Gryffen and Starkey helped K9 after he almost lost his memory trying to find his connection to the STM . ( TV : " Mind Snap " ) Gryffen , K9 and Starkey retrieved the STM ' s temporal stabiliser from the fallen angel crashsite in Canada , discovering that the Korven owned it in the process . ( TV : " Angel of the North " ) The Last Precinct ' s plan to take control of CCPCs went haywire . They were arrested by the Department . ( TV : " The Last Precinct " ) Thorne tricked K9 into giving him his regeneration unit . Starkey encountered Jixey , who warned him that the Department might have been infiltrated by the Korven . ( TV : " Hound of the Korven " ) The Korven attempted an invasion on Earth . Gryffen destroyed them by terminating the STM . Lomax and Thorne were killed and K9 regenerated . ( TV : " The Eclipse of the Korven " )