Played by: Jon Pertwee 1970-1974
Biography: Exiled to earth by the Time Lords, he finds refuge as the scientific adviser working for UNIT, The United Nations Intelligence Task force. He assists them by solving cases that go beyond their world. Owns a canary yellow motorcar named Bessie. A master of the art of Venusian karate.
Personality: Intelligent, serious, tries to put up with the incompetence of Brigadier Lethbridge-Stewart. Always looks out for his assistants.
Second title sequence from season 11
Regeneration from Planet of the Spiders