First contact First contact was the ambiguous term used to describe a planet ' s first official contact with " alien " life . Human first contact . The human race had come into contact with many alien races before first contact , ( TV : " The Invasion " , " The Tenth Planet " , AUDIO : " Storm Warning " et al . ) but most invasions were covered up by the government ( PROSE : " Who Killed Kennedy " , " The Forgotten Son " ) or just assumed by the public to be hoaxes . ( AUDIO : " The Kingmaker " ) First contact policy was decided by the United Nations Security Council in 1968 ( TV : " The Sound of Drums " ) but was inherently outdated , as around half a dozen nations were covering up the existence of aliens from each other . It became deliberate policy under Secretary General Kurt Waldheim to cover up all alien contacts to prevent a destabilisation of the world order . ( PROSE : " The Dying Days " ) Some accounts indicated that the general public accepted extraterrestrial life as fact following incidents such as the Gantacian invasion of 1992 ( COMIC : " Invaders from Gantac ! " , " The Mark of Mandragora " ) and the Availlon fiasco of 1997 . ( TV : " Battlefield " , COMIC : " The Mark of Mandragora " ) In 2006 , the Ninth Doctor witnessed an alien ship crash into Big Ben . He believed this to be the first contact for humans on a large and newsworthy scale . Though the porcine pilot of the ship wasn ' t a true alien , the spaceship crash and the genetic engineering to create the pilot was caused by a Raxacoricofallapatorian family , the Slitheen . ( TV : " Aliens of London " ) The entire event was considered a hoax by at least the press . ( TV : " World War Three " ) On Christmas Day 2006 , a live broadcast of a Sycorax was broadcast on the news . It was believed to be a hoax , but when the Sycorax ship hovered over London , with Harriet Jones later speaking to them on behalf of humanity , their existence was confirmed , ( TV : " The Christmas Invasion " ) if still denied by some as having actually happened . ( TV : " The Runaway Bride " , " Everything Changes " ) In 2008 , , under his alias Harold Saxon which he used to become the British Prime Minister , introduced the Toclafane as a race of peaceful aliens who wished for friendship and diplomatic relations with the people of Earth . When the first contact was taken over by UNIT and the American President Arthur Coleman Winters , the Master and the Toclafane revealed their true colours and began an invasion of Earth . Their year - long rule was negated by the Tenth Doctor . ( TV : " The Sound of Drums " ) Having previously negotiated in secret , their interests represented by the Torchwood Institute , with an alien race nicknamed the 456 in 1965 , the British government was forced to reveal this to UNIT and the international community in 2009 when the 456 returned and demanded 10 % of the Earth ' s children . ( TV : " " ) The 456 were thwarted by Jack Harkness , the leader of Torchwood Three . ( TV : " " ) Humanity ' s first recorded official peaceful first contact with aliens was the Arcturan Treaty of 2085 . Some historians counted this as Real First Contact as government secrecy made it nigh - impossible to work out the actual first contact . ( PROSE : " The Dying Days " ) Other references . In 2007 , Gwen Cooper colloquially referred to her kiss with the sex gas - possessed Carys as " first contact with aliens " , saying that it wasn ' t quite what she expected . ( TV : " Day One " )