Doctor Who (season 13)

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Doctor Who (season 13)
Doctor Who Season 13 DVD.jpg
Cover art of the Region 2 DVD release for first serial of the season
Country of originUnited Kingdom
No. of stories6
No. of episodes26
Original networkBBC One
Original release30 August 1975 (1975-08-30) –
6 March 1976 (1976-03-06)
Season chronology
← Previous
Season 12
Next →
Season 14
List of Doctor Who episodes (1963–1989)

The thirteenth season of British science fiction television series Doctor Who began on 30 August 1975 with the story Terror of the Zygons, and ended with The Seeds of Doom.


Main cast[edit]

Tom Baker continued his role as The Fourth Doctor along with Sarah Jane Smith (Elisabeth Sladen). Harry Sullivan, played by Ian Marter, departed in Terror of the Zygons and reappeared in The Android Invasion as a guest star.

Recurring cast[edit]

Nicholas Courtney returned as Brigadier Lethbridge-Stewart in Terror of the Zygons having last appeared in Robot. John Levene makes his final appearance as Sergeant Benton in The Android Invasion after six years in the role.


Terror of the Zygons was produced as part of the production schedule for Season 12, but was held for transmission from the end of that season to the beginning of Season 13, to coincide with a move from the new season starting at the beginning of the calendar year, to starting in late summer. Terror of the Zygons was also the last appearance of the Brigadier until Mawdryn Undead in Season 20. The season took a transmission break of two weeks over the Christmas 1975 period, between the broadcasts of The Android Invasion and The Brain of Morbius.

StorySerialSerial titleEpisode titlesDirected byWritten byOriginal air dateProd.
UK viewers
(millions) [1]
801Terror of the Zygons"Part One"Douglas CamfieldRobert Banks Stewart30 August 1975 (1975-08-30)4F8.459
"Part Two"Douglas CamfieldRobert Banks Stewart6 September 1975 (1975-09-06)4F6.1
"Part Three"Douglas CamfieldRobert Banks Stewart13 September 1975 (1975-09-13)4F8.254
"Part Four"Douglas CamfieldRobert Banks Stewart20 September 1975 (1975-09-20)4F7.2
The Fourth Doctor is summoned to Earth by the Brigadier who is in Scotland investigating the mysterious loss of oilrigs.
812Planet of Evil"Part One"David MaloneyLouis Marks27 September 1975 (1975-09-27)4H10.4
"Part Two"David MaloneyLouis Marks4 October 1975 (1975-10-04)4H9.956
"Part Three"David MaloneyLouis Marks11 October 1975 (1975-10-11)4H9.157
"Part Four"David MaloneyLouis Marks18 October 1975 (1975-10-18)4H10.154
An expedition is murdered. The Doctor lands on the planet at the same time as the expedition's rescue team, and is immediately taken prisoner as the suspected murderer.
823Pyramids of Mars"Part One"Paddy RussellStephen Harris (Lewis Greifer and Robert Holmes)25 October 1975 (1975-10-25)4G10.5
"Part Two"Paddy RussellStephen Harris (Lewis Greifer and Robert Holmes)1 November 1975 (1975-11-01)4G11.3
"Part Three"Paddy RussellStephen Harris (Lewis Greifer and Robert Holmes)8 November 1975 (1975-11-08)4G9.4
"Part Four"Paddy RussellStephen Harris (Lewis Greifer and Robert Holmes)15 November 1975 (1975-11-15)4G11.760
Marcus Scarman, the servant of the Osiran Sutekh, seeks to release Sutekh from his prison.
834The Android Invasion"Part One"Barry LettsTerry Nation22 November 1975 (1975-11-22)4J11.958
"Part Two"Barry LettsTerry Nation29 November 1975 (1975-11-29)4J11.3
"Part Three"Barry LettsTerry Nation6 December 1975 (1975-12-06)4J12.1
"Part Four"Barry LettsTerry Nation13 December 1975 (1975-12-13)4J11.4
The Doctor and Sarah Jane land in a duplicate of an English village created by the Kraals as a testing ground for their invasion plot.
845The Brain of Morbius"Part One"Christopher BarryRobin Bland (Terrance Dicks and Robert Holmes)3 January 1976 (1976-01-03)4K9.5
"Part Two"Christopher BarryRobin Bland (Terrance Dicks and Robert Holmes)10 January 1976 (1976-01-10)4K9.3
"Part Three"Christopher BarryRobin Bland (Terrance Dicks and Robert Holmes)17 January 1976 (1976-01-17)4K10.157
"Part Four"Christopher BarryRobin Bland (Terrance Dicks and Robert Holmes)24 January 1976 (1976-01-24)4K10.2
Years ago, the renegade Time Lord known as Morbius was executed. When the Doctor and Sarah Jane arrive on the planet Karn, they discover that Dr Solon is creating a body so that Morbius may live again.
856The Seeds of Doom"Part One"Douglas CamfieldRobert Banks Stewart31 January 1976 (1976-01-31)4L11.459
"Part Two"Douglas CamfieldRobert Banks Stewart7 February 1976 (1976-02-07)4L11.4
"Part Three"Douglas CamfieldRobert Banks Stewart14 February 1976 (1976-02-14)4L10.3
"Part Four"Douglas CamfieldRobert Banks Stewart21 February 1976 (1976-02-21)4L11.1
"Part Five"Douglas CamfieldRobert Banks Stewart28 February 1976 (1976-02-28)4L9.9
"Part Six"Douglas CamfieldRobert Banks Stewart6 March 1976 (1976-03-06)4L11.5
Scientists uncover two giant seedpods buried in the Antarctic permafrost for thousands of years. Ruthless plant-lover Harrison Chase decides he must have them for his rare collection, but the pods may spell the end of all non-plant life on Earth.


The entire season was broadcast from 30 August 1975 to 6 March 1976.

DVD releases[edit]

The stories have been released on DVD individually since 2004.

Serial name Number and duration
of episodes
R2 release date R4 release date R1 release date
Terror of the Zygons 4 × 25 min. 30 September 2013 2 October 2013 8 October 2013
Planet of Evil 4 × 25 min. 15 October 2007 5 December 2007 4 March 2008
Pyramids of Mars 4 × 25 min. 1 March 2004 10 June 2004 7 September 2004
The Android Invasion
Only available as part of the U.N.I.T. Files box set in Regions 2 and 4.
Only available individually in Region 1.
4 × 25 min. 9 January 2012 5 January 2012 10 January 2012
The Brain of Morbius 4 × 25 min. 21 July 2008 2 October 2008 7 October 2008
The Seeds of Doom 6 × 25 min. 25 October 2010 2 December 2010 8 March 2011

In print[edit]

Serial name Novelisation title Author First published
Terror of the Zygons Doctor Who and the Loch Ness Monster Terrance Dicks 15 January 1976
Planet of Evil Doctor Who and the Planet of Evil Terrance Dicks 21 July 1977
Pyramids of Mars Doctor Who and the Pyramids of Mars Terrance Dicks 16 December 1976
The Android Invasion Doctor Who and the Android Invasion Terrance Dicks 16 November 1978
The Brain of Morbius Doctor Who and the Brain of Morbius Terrance Dicks 19 May 1977
The Seeds of Doom Doctor Who and the Seeds of Doom Philip Hinchcliffe 17 February 1977


  1. ^ a b "Ratings Guide". Doctor Who News. Retrieved 27 December 2014.