The twenty-third season of British science fiction television series Doctor Who, known collectively as The Trial of a Time Lord, aired in weekly episodes from 6 September to 6 December 1986. It contained four adventures: The Mysterious Planet, Mindwarp, Terror of the Vervoids and The Ultimate Foe; the season also marked the final regular appearance of Colin Baker as the Sixth Doctor.
The Mysterious Planet is the first serial of the larger narrative known as The Trial of a Time Lord which encompasses the whole of the 23rd season of the British science fiction television series Doctor Who. It was first broadcast in four weekly parts on BBC1 from 6 to 27 September 1986. The title The Mysterious Planet is not used on-screen and only appears in the serial's scripts with the four episodes that comprise the story being transmitted as The Trial of a Time Lord Parts One to Four.
Mindwarp is the second serial of the larger narrative known as The Trial of a Time Lord which encompasses the whole of the 23rd season of the British science fiction television series Doctor Who. It was first broadcast in four weekly parts on BBC1 from 4 to 25 October 1986. The title Mindwarp is not used on screen and appears only on the serial's scripts with the four episodes that comprise the story being transmitted as The Trial of a Time Lord Parts Five to Eight. This story marks the final appearance of Nicola Bryant as Peri Brown.
The Ultimate Foe is the fourth and final serial of the larger narrative known as The Trial of a Time Lord which encompasses the whole of the 23rd season of the British science fiction television series Doctor Who. It was first broadcast in two weekly parts on BBC1 on 29 November and 6 December 1986. This segment is also cited in some reference works under its working title of Time Incorporated. The title The Ultimate Foe is never used on-screen and was first used in relation to these episodes for the 1988 novelisation, with the two episodes that comprise the serial being referred to as The Trial of a Time Lord Parts Thirteen and Fourteen. This was the last story to feature Colin Baker as the Sixth Doctor, as Baker declined to do the regeneration for the following story, Time and the Rani.
The Virgin New Adventures are a series of novels from Virgin Publishing based on the British science-fiction television series Doctor Who. They continued the story of the Doctor from the point at which the television programme went into hiatus from television in 1989.
The Two Doctors is the fourth serial of the 22nd season of the British science fiction television series Doctor Who, which was first broadcast in three weekly parts on BBC1 from 16 February to 2 March 1985.
Perpugilliam “Peri” Brown, is a fictional character played by Nicola Bryant in the long-running British science fiction television series Doctor Who.
The Ice Warriors are a fictional extraterrestrial race of reptilian humanoids in the long-running British science fiction television series Doctor Who. They were originally created by Brian Hayles, first appearing in the 1967 serial The Ice Warriors where they encountered the Second Doctor and his companions Jamie and Victoria. In Doctor Who, the Ice Warriors originated on Mars, which within the series narrative is a dying world. Their early appearances depict the Ice Warriors as attempting to conquer the Earth and escape their planet as early as Earth's Ice Age. A frozen group are discovered by an Earth scientific team who dub them 'Ice Warriors' in their first appearance. Despite this not being the name of their species, an Ice Lord later refers to his soldiers as Ice Warriors in the 1974 serial The Monster of Peladon. Similarly there is a fleeting reference to themselves as such in The Curse of Peladon. Although originally appearing as villains, subsequent appearances have depicted Ice Warriors that have eschewed violence and even ally themselves with the Doctor. They have also been featured in flashback and cameo appearances, in addition to appearing frequently in spin-off media such as novels and audio releases.
Attack of the Cybermen is the first serial of the 22nd season of the British science fiction television series Doctor Who, which was first broadcast in two weekly parts on 5 and 12 January 1985. It was credited to the pseudonymous author "Paula Moore"; there are conflicting accounts concerning to whom this credit belongs. Beginning with this serial and continuing for the remainder of Season 22, episodes were 45 minutes in length ; for syndication, in some markets, this serial is re-edited into four 25-minute segments.
The Valeyard is a fictional character from the long-running British science fiction television series Doctor Who. He is described by the Master as an amalgamation of the Doctor's darker sides from between his twelfth and final incarnations. In the story The Trial of a Time Lord, comprising the whole of Season 23, the High Council of the Time Lords appoint the Valeyard as prosecutor at the Sixth Doctor's trial, hoping to have him executed and thereby remove the sole witness to their near destruction of life on Earth.
Vengeance on Varos is the second serial of the 22nd season of the British science fiction television series Doctor Who, which was first broadcast in two weekly parts on 19 and 26 January 1985.
Warriors' Gate is the fifth serial of the 18th season of the British science fiction television series Doctor Who. It was written by Stephen Gallagher and was first broadcast in four weekly parts on BBC1 from 3 to 24 January 1981.
Planet of Fire is the fifth serial of the 21st season in the British science fiction television series Doctor Who, which was first broadcast in four twice-weekly parts on BBC1 from 23 February to 2 March 1984.
The Sixth Doctor is an incarnation of the Doctor, the protagonist of the BBC science fiction television series Doctor Who. He is 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.
Philip Martin was an English television screenwriter. He created the BBC television drama series Gangsters in the 1970s and later wrote two television serials for Doctor Who during Colin Baker's tenure as the Sixth Doctor in the 1980s.
The Nightmare Fair is a story originally written for the 1986 season of Doctor Who, but never filmed. A novelisation based on the script was published in 1989 by Target Books, as the first volume of its Missing Episodes series. The script and novelisation were written by former series producer Graham Williams, and would have been directed by Matthew Robinson had it gone to air. It is the first novel-length text featuring The Doctor not to be based upon a previously transmitted production, although being a novelisation it is not strictly speaking an "original" novel.
The Ultimate Evil is the second in a series of novelisations, based on a number of cancelled scripts from the 1986 season of the television series Doctor Who. It was written by Wally K. Daly. It was first published by Target Books in 1989 as the second volume of its Missing Episodes series.
The Hollows of Time is a story originally written for the 23rd series of Doctor Who; however, it was cancelled along with the rest of the originally planned scripts for that series due to Doctor Who's 1985 hiatus. Big Finish Productions adapted the story into an audio play in 2010 as part of their Lost Stories series.
Sil and the Devil Seeds of Arodor is a 2019 direct-to-video mini-series produced by Reeltime Pictures. It stars the character of Sil from the television Doctor Who, as well as other elements licensed from the series. Nabil Shaban, who portrayed Sil in the original two serials, returned to the role.
