Sixth Doctor

The Sixth Doctor is the sixth incarnation of the protagonist of the long-running BBC television science fiction series Doctor Who. He was portrayed by Colin Baker. Although his televisual time on the series was comparatively brief and turbulent, Baker has continued as the Sixth Doctor in Big Finish's range of original Doctor Who audio adventures.

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, he can regenerate his body; in doing so, his physical appearance and personality change.

The Sixth Doctor's brightly coloured, mismatched clothes and brash, overbearing personality set him apart from all his previous incarnations, in some ways hearkening back to the early irascibility and initial undertones of untrustworthiness of the First Doctor.

The Sixth Doctor appeared in three seasons. His appearance in the first of these was at the end of the final episode of The Caves of Androzani which featured the regeneration from the Fifth Doctor and thereafter in the following serial The Twin Dilemma, the end of that season. The Sixth Doctor's era was marked by the decision of the BBC controller Michael Grade to put the series on an 18-month "hiatus" between seasons 22 and 23, with only one new Doctor Who story, Slipback, made on radio during the hiatus, broadcast as 6 parts (at 10 minutes each) on BBC Radio 4 from 25 July to 8 August 1985, as part of a children's magazine show called Pirate Radio Four. Colin Baker had been signed up for four years, as the previous actor Peter Davison had left after only three years.

Prior to its postponement, season 23 was well advanced with episodes already drafted and in at least one case distributed to cast and production. Alongside "The Nightmare Fair", The Ultimate Evil", "Mission to Magnus", "Yellow Fever and How to Cure It", the remaining stories were still under development in a 25 minute episode format after the season was postponed. These were all dropped with the reconception of the season in mid 1985 in favour of a 14 episode story arch called The Trial of a Time Lord.

The Sixth Doctor also appeared in the special Dimensions in Time. There are also novels and audio plays featuring the Sixth Doctor. A glimpse of a sketch of the Sixth Doctor was later seen in John Smith's A Journal of Impossible Things in the revived third series episode "Human Nature". Brief holographic clips of the Sixth Doctor appear in "The Next Doctor" and "The Eleventh Hour".

Read more about Sixth Doctor:  Biography, Personality, Costume, Story Style, Other Appearances

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