Season 13 (Doctor Who 1963)

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Season 13 of Doctor Who ran between 30 August 1975 and 6 March 1976. It starred Tom Baker as the Fourth Doctor and Elisabeth Sladen as Sarah-Jane Smith. The season opened with Terror of the Zygons and concluded with The Seeds of Doom.


It consisted of six serials composed of twenty-six episodes, a trend which would continue until Season 17. It was during this season that the Doctor cut ties to UNIT (after Terror of the Zygons, the Brigadier would not appear again until Mawdryn Undead in 1983, and The Seeds of Doom marked the last occasion to date that the Doctor was explicitly said to be working for UNIT – as opposed to working with them as occasions warranted). Several of the serials in this season, particularly Pyramids of Mars and The Brain of Morbius, are among the best-known of the 1970s-era storylines. Though it was aired as a part of Season 13, Terror of the Zygons was actually filmed as part of the previous season; this holdover allowed the series to switch back to an autumn season start.

This season would also feature the last appearance of the original TARDIS prop, designed by Peter Brachacki, as it was becoming too decayed and unstable to continue using.

With this season, Doctor Who returned to launching new seasons in the autumn, something that had not been done since Season 6.

This season also featured a significant gap between stories over the Christmas period (in this instance, between The Android Invasion and The Brain of Morbius). This became the standard for almost the remainder of the Tom Baker era, barring Seasons 16 and 17. Series 6 and 7 of the modern era of the show followed a similar format.

Television stories[[edit]]

# Title Writer Episodes Notes
1 Terror of the Zygons Robert Banks Stewart 4 Final appearance of Harry Sullivan as a companion and final regular appearance of Brigadier Lethbridge-Stewart. First appearance of the Zygons.
2 Planet of Evil Louis Marks 4 Debut of another TARDIS console room design.
3 Pyramids of Mars Stephen Harris, aka
Robert Holmes
Story by Lewis Greifer
4 First appearance of Sutekh.
4 The Android Invasion Terry Nation 4 Final television appearances by Harry Sullivan and John Benton. Final regular UNIT-based story.
5 The Brain of Morbius Robin Bland, aka Terrance Dicks
Robert Holmes
4 First appearance of the Time Lord Morbius and the Sisterhood of Karn.
6 The Seeds of Doom Robert Banks Stewart 6





  • Harry Sullivan left as a companion in Terror of the Zygons, and later returned in The Android Invasion.
  • Three stories featured UNIT: Terror of the Zygons, The Android Invasion and The Seeds of Doom. None of the regular UNIT characters appeared in the latter, which marked the final notable appearance of or reference to UNIT until Time-Flight.
  • This series has been voted the Best All-Round Series in DWM 413's Mighty 200 Poll.
  • For the first time since Season 7, this season features no returning antagonists that had made a prior appearance.

Stories set before this season[[edit]]

The following stories are the known ones to be set during the chronological gap between Season 12 finale Revenge of the Cybermen and Season 13 opener Terror of the Zygons:



Stories set during this season[[edit]]

Adaptations and merchandising[[edit]]

Home media[[edit]]

VHS releases[[edit]]

  • Terror of the Zygons (1988/1999)
  • Planet of Evil (1993)
  • Pyramids of Mars (1985) (edited movie format)
  • Pyramids of Mars (1994)
  • The Android Invasion (1995)
  • The Brain of Morbius (1984) (edited movie format)
  • The Brain of Morbius (1990)
  • The Seeds of Doom (1994)
  • The Tom Baker Years (extracts from each of the stories) (1991)

DVD & Blu-ray releases[[edit]]

All serials of season 13 were released individually on DVD between 2004 and 2013. Terror of the Zygons was originally released on DVD, minus special features, as part of The Fourth Doctor Time Capsule box set on 29 July 2013. It was finally released individually, complete with special features, on 30 September 2013.

Serial name Number and duration
of episodes
R2 release date R4 release date R1 release date
Terror of the Zygons

Available individually or in The Fourth Doctor Time Capsule box set in Region 2.
Only available individually in Regions 1 and 4.

4 × 25 min. 29 July 2013
(The Fourth Doctor Time Capsule release)
1 September 2013
(Individual release)
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

Download/streaming availability[[edit]]

Serial name Amazon Video iTunes
Terror of the Zygons (4 episodes)
Planet of Evil (4 episodes)
Pyramids of Mars (4 episodes)
The Android Invasion (4 episodes)
The Brain of Morbius (4 episodes)
The Seeds of Doom (6 episodes)


See also[[edit]]

External links[[edit]]