Third Doctor  From Wikipedia, the free encyclopedia Jump to:
navigation, search The Doctor Third Doctor.jpg The Third Doctor
Portrayed by Jon Pertwee Tenure 3 January 1970–8 June 1974
First appearance Spearhead from Space Last appearance Planet of
the Spiders (regular) The Five Doctors (guest) Dimensions In
Time (charity special) Number of series 5 Appearances 24 stories
(128 episodes) Companions Liz Shaw Jo Grant Sarah Jane Smith
Preceded by Second Doctor (Patrick Troughton) Succeeded by
Fourth Doctor (Tom Baker) Series Season 7 (1970) Season 8 (1971)
Season 9 (1972) Season 10 (1972–73) Season 11 (1973–74)  The
Third Doctor is an incarnation of the Doctor, the protagonist of
the BBC science fiction television series Doctor Who. He was
portrayed by actor Jon Pertwee.  Within the series' narrative,
the Doctor is a centuries-old Time Lord alien from the planet
Gallifrey who travels in time and space in his TARDIS,
frequently with companions. When the Doctor is critically
injured, his body can regenerate; as a r