Third Doctor See List of non-televised Third Doctor stories. Third Doctor 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. At the end of life, the Doctor can regenerate his body; as a result, his physical appearance and personality change. Pertwee portrays the third such incarnation, a dapper man of action of stark contrast to his
The Doctor (Doctor Who) He was not aged, in ill health nor mortally wounded at the end of "The War Games" (1969). Prior to his exile, the Time Lords deemed that his current appearance was too well known on Earth and therefore forced a "change of appearance" on him. This method of changing appearance was a source of early speculation that the Second and Third Doctor were actually the same incarnation since the second was never seen to truly "die" onscreen. Continuity has since established that one of his allotted regenerations was indeed used up for this transition. The 2005 series began with the