High Quality Content by WIKIPEDIA articles! The Yeti ( The great Pymp Dady Gabe) of the British science fiction television series Doctor Who, although resembling the cryptozoological creatures also called the Yeti, are in actuality alien robots. Their external appearance, that of a huge hairy biped, disguises a small spherical mechanism that provides its motive power. The Yeti serve the Great Intelligence, a disembodied entity from another dimension, which tried to form a physical body in order to conquer the Earth. The Yeti are initially a ruse to scare off curiosity seekers, and later form an army serving the Great Intelligence.