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The sixteenth season of Doctor Who ran between 2 September 1978 and 24 February 1979. It consisted of six serials and twenty-six episodes. This season saw the introduction of the Black and White Guardians as well as the companion Romana I. This season is sometimes colloquially known as The Key to Time season after the story arc involving the Key to Time. Although not the first season to consist of linked stories (Season 8 in 1971 was the first, as all the stories that year featured the Master), it was the first to be recognised as having a series-long arc. Although multi-serial arcs would occur again, such a full-season experiment wouldn't be attempted again until Season 23.
Season 16 marked a triple milestone for Doctor Who: the hundredth story (The Stones of Blood), the five-hundredth episode (episode 1 of The Armageddon Factor) and the fifteenth anniversary of the first broadcast, on 23 November 1978.
A number of publicity photos for the season show Tom Baker sporting a very obvious bandage on his upper lip; this was due to his being bit by a dog shortly before filming for the season began. The resulting lip injury is visible to varying degrees throughout the season.
In 2002 (Region 1) it became the first Doctor Who season to be released to DVD in its entirety in a single box set; it remained the only "classic series" season to be available as a single set until the release of Season 23, The Trial of a Time Lord to DVD in 2008.
Television stories
| # | Title | Writer | Episodes | Notes |
| 1 | The Ribos Operation | Robert Holmes | 4 | First appearance of Romana. First appearance of the White Guardian. |
| 2 | The Pirate Planet | Douglas Adams | 4 | First story written by Douglas Adams. |
| 3 | The Stones of Blood | David Fisher | 4 | Marks Doctor Who's one hundredth television story. Part four aired during the fifteenth anniversary of the series. |
| 4 | The Androids of Tara | David Fisher | 4 | Parody of The Prisoner of Zenda. Mary Tamm plays four different roles in this story; Romana, Princess Strella, and android doubles for both characters. |
| 5 | The Power of Kroll | Robert Holmes | 4 | K9 is absent during this story due to his prop's inability to manoeuver in the swampy location of the episode. |
| 6 | The Armageddon Factor | Bob Baker Dave Martin |
6 | Final appearance of Mary Tamm as Romana; first appearance of the Black Guardian; Lalla Ward's first role in Doctor Who. |
Cast
Recurring
Guest
- The Guardian - Cyril Luckham
- Garron - Iain Cuthbertson
- Unstoffe - Nigel Plaskitt
- Graff Vynda-K - Paul Seed
- Sholakh - Robert Keegan
- Binro - Timothy Bateson
- Captain - Bruce Purchase
- Mr. Fibuli - Andrew Robertson
- Kimus - David Warwick
- Mula - Primi Townsend
- Nurse - Rosalind Lloyd
- Professor Rumford - Beatrix Lehmann
- Vivien Fay - Susan Engel
- Leonard de Vries - Nicholas McArdle
- Martha - Elaine Ives-Cameron
- Megara Voices - Gerald Cross, David McAlister
Notes
- John Leeson, more well known as the voice of K9, appeared as the human Dugeen during The Power of Kroll due to K-9 being absent from that story.
- Lalla Ward guest stars as Princess Astra in The Armageddon Factor before taking over the role of Romana from Mary Tamm in Destiny of the Daleks.
Stories set during this season
- PROSE: Tomb of Valdemar (between The Ribos Operation and The Pirate Planet)
- PROSE: The Shadow of Weng-Chiang (between The Stones of Blood and The Androids of Tara)
- PROSE: Heart of TARDIS (between The Stones of Blood and The Androids of Tara)
- AUDIO: Ferril's Folly (between The Stones of Blood and The Androids of Tara)
- PROSE: X-Rani and the Ugly Mutants (between The Androids of Tara and The Power of Kroll)
- PROSE: Light Fantastic (between The Androids of Tara and The Power of Kroll)
- PROSE: Reluctant Warriors (between The Androids of Tara and The Power of Kroll)
- COMIC: The Weapon (between The Androids of Tara and The Power of Kroll)
- PROSE: Return of the Electrids (between The Androids of Tara and The Power of Kroll)
- PROSE: The Sleeping Guardians (between The Androids of Tara and The Power of Kroll)
- AUDIO: Luna Romana (partially set between The Power of Kroll and The Armageddon Factor)
Adaptations and merchandising
Home media
VHS
- The Ribos Operation
- The Pirate Planet
- The Stones of Blood
- The Androids of Tara
- The Power of Kroll
- The Armageddon Factor
- The Tom Baker Years (excerpts from all stories)
DVD
This entire season was released with minimal restoration and extras in region 1 only on 1 October 2002 as a box set and was available individually. A limited edition box set with full restoration and expanded extras was released in region 2 on 24 September 2007. This limited edition version was later issued as the 7 November 2007 region 4 release, the 3 March 2009 region 1 "Special Edition" release (these were also available individually), and the 16 November 2009 non-limited region 2 re-release.
Download/streaming availability
| Serial name | Amazon Video | BBC Store | iTunes |
|---|---|---|---|
| The Ribos Operation (4 episodes) | ✓ | ✓ | ✓ |
| The Pirate Planet (4 episodes) | ✓ | ✓ | ✓ |
| The Stones of Blood (4 episodes) | ✓ | ✓ | ✓ |
| The Androids of Tara (4 episodes) | ✓ | ✓ | ✓ |
| The Power of Kroll (4 episodes) | ✓ | ✓ | ✓ |
| The Armageddon Factor (6 episodes) | ✓ | ✓ | ✓ |
Novels
- Doctor Who and the Ribos Operation
- Doctor Who and the Stones of Blood
- Doctor Who and the Androids of Tara
- Doctor Who and the Power of Kroll
- Doctor Who and the Armageddon Factor
Target Books was unable to come to an agreement with Douglas Adams to novelise his script, The Pirate Planet, leaving it one of only a half-dozen classic-series episodes never adapted as a book.