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 Lodger (Doctor Who) of the upstairs apartment. When Roberts began writing for the episode, he knew the series' overarching plot but was not aware who was to be cast as the Eleventh Doctor. Roberts based the Doctor's lines on those written in Moffat's completed scripts and further characterization was added by Matt Smith's reading of the lines. The episode also contains several cultural references. When the Doctor is having a shower, he is heard singing ""La donna è mobile"", which his third incarnation sang in "Inferno". When the Doctor introduces himself to the time ship's Avatar, he claims to be "Captain Troy Handsome