The sixteenth season of

British British may refer to: Peoples, culture, and language * British people, nationals or natives of the United Kingdom, British Overseas Territories, and Crown Dependencies. ** Britishness, the British identity and common culture * British English, ...

science fiction television Science fiction first appeared in television programming in the late 1930s, during what is called the Golden Age of Science Fiction. Special effects and other production techniques allow creators to present a living visual image of an imaginary ...

series '' Doctor Who'', known collectively as ''The Key to Time'', began on 2 September 1978 with '' The Ribos Operation'', and ended with ''

The Armageddon Factor ''The Armageddon Factor'' is the sixth and final serial of the 16th season of the British science fiction television series ''Doctor Who'', which was first broadcast in six weekly parts on BBC1 from 20 January to 24 February 1979. It was the las ...

''. The arc was originally conceived by producer Graham Williams, who had proposed it as part of his application for the producer's job in 1976. The name refers to the powerful artefact, the segments of which are what the

Fourth Doctor The Fourth Doctor is an incarnation of the Doctor, the protagonist of the BBC science fiction television series ''Doctor Who''. He is portrayed by Tom Baker. Within the series' narrative, the Doctor is a centuries-old alien Time Lord from the ...

and his companions, Romana and K9, search for during the season.

Anthony Read Anthony Read (21 April 1935 – 21 November 2015) was an English television producer, screenwriter, script editor and author. He was principally active in British television from the 1960s to the mid-1980s, which included a period as a script ...

was the script editor until the final story, when

Douglas Adams Douglas Noel Adams (11 March 1952 – 11 May 2001) was an English author and screenwriter, best known for ''The Hitchhiker's Guide to the Galaxy''. Originally a 1978 The Hitchhiker's Guide to the Galaxy (radio series), BBC radio comedy, ''The H ...

became the new script editor.

Synopsis

A figure calling himself the White Guardian commissions the Doctor and K9, assisted by a new companion, the Time Lady Romana, to find the six segments of the Key to Time, a cosmic artefact resembling a perfect cube that maintains the equilibrium of the universe. Since it is too powerful for any single being to possess, it has been split into six different segments and scattered across space and time, disguised by the raw elemental power within them into any shape or size. However, since the forces balancing the universe are so upset, the White Guardian needs to recover the segments of the Key to stop the universe so that he can restore the balance. The White Guardian also warns the Doctor of the

Black Guardian This is a list of villains from the long-running British science fiction television series ''Doctor Who''. For other, related lists, see below. See also * List of ''Doctor Who'' supporting characters * List of ''Doctor Who'' henchmen * Lis ...

, who also wishes to obtain the Key to Time for his own purposes. In the final episode, the Black Guardian, disguised as the White Guardian, attempts to take the Key from the Doctor. However, the Doctor sees through the figure's charade and orders the segments of the Key to Time to once again become scattered across all of time and space, bar the sixth, which he reinstates as Princess Astra. Afterward, the Doctor decides to install a device called a randomiser into the TARDIS' navigation system for a period of time to make his following voyages unpredictable to evade the Black Guardian.

The six segments

#The first segment is disguised as a lump of Jethrik on the planet Ribos. #The second is the planet Calufrax, shrunk to miniature size by the space-hopping pirate planet Zanak. #The third is the Great Seal of Diplos, which has been stolen by a criminal of that planet. #The fourth is part of a statue on the planet Tara. #The fifth has been consumed by the squid Kroll, causing it to turn into a gigantic monster. #The final segment is a female humanoid – Princess Astra.

Casting

Main cast

Tom Baker Thomas Stewart Baker (born 20 January 1934) is an English actor and writer. He is well known for his portrayal of the fourth incarnation of the Doctor in the science fiction television series ''Doctor Who'' from 1974 to 1981.Scott, Danny. (1 ...

as the

Mary Tamm Mary Tamm (22 March 1950 – 26 July 2012) was a British actress, who appeared in many British TV drama series and serials, and is best known for her role as Romana I in the BBC's science fiction television series ''Doctor Who'', starrin ...

as Romana * John Leeson as Voice of K9

Guest Cast

Valentine Dyall Valentine Dyall (7 May 1908 – 24 June 1985) was an English character actor. He worked regularly as a voice actor, and was known for many years as "The Man in Black", the narrator of the BBC Radio horror series '' Appointment with Fear'' ...

as the

continued his role as The Fourth Doctor, and saw the introduction of Romana played by

. This season was the only one to feature Tamm as the first incarnation of Romana, as Tamm left the programme after only one season because she felt that the character had reverted to the traditional assistant role and could not be developed further. The second incarnation, played by

Lalla Ward Sarah Jill "Lalla" Ward (born 28 June 1951) is an English actress, voice artist and author. She is best known for playing the role of Romana II in the BBC television series ''Doctor Who'' from 1979 to 1981. Career Early career Ward's stage na ...

(who also appeared in this season as Princess Astra), began her run in the first serial of the next season (''

Destiny of the Daleks ''Destiny of the Daleks'' is the first serial of the 17th season of the British science fiction television series ''Doctor Who'', which was first broadcast in four weekly parts on BBC1 from 1 September to 22 September 1979. The story introduces ...

'').

Serials

took over as script editor from

for ''

''. Season 16 consists of one long story arc encompassing six separate, linked stories.

Broadcast

''The Key to Time'' was broadcast from 2 September 1978 to 24 February 1979.

Home media

VHS releases

DVD and Blu-ray releases

In print

References

{{DEFAULTSORT:Key to Time, The 1978 British television seasons 1979 British television seasons Season 16 Season 16 16 Fictional cubes