Topic summary
Great Intelligence

Extracted from the Wikipedia article List of Doctor Who universe creatures and aliens.
Great Intelligence
The Great Intelligence is a disembodied being who first appears in the 1967 serial The Abominable Snowmen and serves as a recurring antagonist in the series. In its debut serial, the Intelligence attempted to attack a Tibetan monastery using its robotic creations, the Yeti (see below). The Intelligence subsequently appeared in the 1968 serial The Web of Fear, where it attempted to invade the London Underground using its Yeti minions. The Intelligence later appears in the 2012 episode "The Snowmen", where it takes the form of "intelligent snow" in Victorian England and manipulates the mind of a man named Walter Simeon into helping it conquer the Earth. The Intelligence then proceeds with another plan in the twenty-first century to kidnap the minds of people using the Wi-Fi in the 2013 episode "The Bells of Saint John". The 2013 episode "The Name of the Doctor" sees the Intelligence, seeking revenge against the Doctor for its various defeats, taking the form of Simeon and capturing friends of the Eleventh Doctor in order to lure the Doctor to his tomb. The Intelligence seeks to use the tomb to access the Doctor's history, where it will rewrite the Doctor's victories into defeats. The Intelligence is defeated by the Doctor's companion Clara Oswald, who undoes the damage caused by the Intelligence.