Doctor Who season 26

The 26th season of Doctor Who premiered on 6 September 1989 with the serial "Battlefield," and consisted of four serials, ending with "Survival," which was the final episode of Doctor Who for over 15 years, until the show was revived in 2005. John Nathan-Turner produced the series, with Andrew Cartmel script editing.

Main cast

 * Sylvester McCoy as the Seventh Doctor
 * Sophie Aldred as Ace

Sylvester McCoy and Sophie Aldred both continue their roles as the Seventh Doctor and Ace for their final season.

Recurring stars

 * Nicholas Courtney as Brigadier Lethbridge-Stewart
 * Anthony Ainley as the Master

Nicholas Courtney returned to play Brigadier Lethbridge-Stewart in Battlefield. He first appeared with the Second Doctor in 1968 in The Web of Fear before becoming a recurring character throughout the Second Doctor to the Fifth Doctor and last appearing in "The Five Doctors" (1983).

Anthony Ainley returned to play The Master in Survival, having last appeared in The Trial of a Time Lord (1986). This was Ainley's final television appearance in the role, though he portrayed the Master one last time in the 1997 computer game Destiny of the Doctors.

Guest stars
Jean Marsh, who had portrayed Joanna in The Crusade (1965) and Sara Kingdom in The Daleks' Master Plan (1965–66), appeared in Battlefield playing the part of the main antagonist.

Serials
Season 26 continued Andrew Cartmel's trend of bringing a darker and more mysterious tone to the show, with a particular focus on Ace's past and the Doctor's manipulative nature. The season aired on Wednesdays, as per the previous season's schedule.

Broadcast
The entire season was broadcast from 6 September to 6 December 1989. The Curse of Fenric was originally intended to be aired before Ghost Light, but was subsequently rescheduled.

Season 27
Midway through 1989, Doctor Who's production team began initial planning for Season 27, which would have aired at the end of 1990. Andrew Cartmel and the writers he had worked with regularly, including Ben Aaronovitch, Ian Briggs, and Marc Platt, brainstormed possible story ideas. One of the major proposed plot points for Season 27 was the departure of Ace, who would have been taken to Gallifrey to become a Time Lord herself. This would also have seen the subsequent introduction of a new companion, planned as an "aristocratic cat burglar". The cancellation of the series meant that no detailed work was undertaken beyond these initial ideas:
 * Bad Destination by Ben Aaronovitch: Intended to feature a new monster called the "Metatraxi", a race of samurai-like insect warriors, this was planned as a story concerning the politics of humanitarian aid. The only significant detail was the idea of the opening, which would have featured Ace as the captain of a starship.
 * Thin Ice by Marc Platt: Planned as the serial that would see the departure of Ace, this was to see the return of the Ice Warriors and be set in London in 1968.
 * Action At A Distance by Andrew Cartmel: Planned as the introduction of the new companion, who would have come across the Doctor in the midst of robbing a country house.
 * Alixion, by Robin Mukherjee: It would have featured the Doctor playing a series of deadly games on an asteroid, and would have likely led to the Seventh Doctor's regeneration and Sylvester McCoy's departure.
 * Blood And Iron, by Andrew Cartmel: was being considered for the final serial as well.

Four of the five proposed serials were subsequently adapted by the authors alongside Big Finish Productions into audio adventures that were released as part of their Doctor Who: The Lost Stories range in 2011:
 * Bad Destination was released as Earth Aid
 * Thin Ice was released under its own title
 * Action at a Distance became Crime of the Century
 * Blood and Iron was released as Animal

The only one of the proposed stories that did not receive a release from Big Finish was Alixion.

Although the first series of Doctor Who's return in 2005 is the 27th full series of the show, the production team officially restarted the series numbering from scratch. This was mainly due to the 16-year gap between Season 26 and the new series (not counting the 1996 television movie).