Yeti (The Five Doctors)

A Yeti was time scooped to the Death Zone on Gallifrey. It was encountered in a cave by the Second Doctor and the Brigadier, who were no strangers to the Yetis. The Doctor maddened it with fireworks and the resulting rock fall prevented any further interaction with it. (TV: The Five Doctors)

Behind the scenes
It is not clear whether this Yeti was a robot of the sort controlled by the Great Intelligence or an actual Tibetan Yeti.