Cover art of the Blu-ray release for the complete season
Starring
Tom Baker
Lalla Ward
John Leeson
Matthew Waterhouse
Sarah Sutton
Janet Fielding
No. of stories
7
No. of episodes
28
Release
Original network
BBC1
Original release
30 August 1980 (1980-08-30) – 21 March 1981 (1981-03-21)
Season chronology
← Previous Season 17
Next → Season 19
List of episodes
The eighteenth season of British science fiction television series Doctor Who consisted of seven four-episode serials broadcast from 30 August 1980 with the serial The Leisure Hive, to 21 March 1981 with the serial Logopolis. The season is Tom Baker's final as the Fourth Doctor before his regeneration into the Fifth Doctor (Peter Davison), as well as Lalla Ward's as companion Romana II and John Leeson's as the voice of K9. For the second time (The first being during Season 4 and third being Season 21), the entire main cast changed over the course of a single season. The season also sees the debut of Matthew Waterhouse as Adric, Sarah Sutton as Nyssa, and Janet Fielding as Tegan Jovanka, the three of whom would remain regular companions into the Fifth Doctor's era, as well as the return of the Master, portrayed both by Geoffrey Beevers and Anthony Ainley.
The season was the first to be produced by John Nathan-Turner, who would produce every season of the show until 1989, and the first to feature script editor Christopher H. Bidmead. The season features a trilogy of connected serials, Full Circle, State of Decay, and Warrior's Gate, which form a trilogy set in a "bubble universe" called E-Space,[1] as well as The Keeper of Traken and Logopolis, the first two serials of a trilogy continued in season 19's Castrovalva, centered on the return of the Master and the regeneration of the Fourth Doctor.[2]
^Sawdey, Evan (10 June 2009). "Doctor Who: The E-Space Trilogy, PopMatters". PopMatters. Retrieved 28 December 2021.
^Doctor Who: New Beginnings (The Keeper of the Traken/Logopolis/Castrovalva). Region 2 DVD, retrieved 28 December 2021
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