The Invisible Enemy (Doctor Who)
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''The Invisible Enemy'' is the second serial of the 15th season of the British
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 ''Doctor Who'' is a British science fiction television series broadcast by the BBC since 1963. The series depicts the adventures of a Time Lord called the Doctor, an extraterrestrial being who appears to be human. The Doctor explores the u ...
'', which was first broadcast in four weekly parts on
BBC1 BBC One is a British free-to-air public broadcast television network owned and operated by the BBC. It is the corporation's flagship network and is known for broadcasting mainstream programming, which includes BBC News television bulletins, ...
from 1 to 22 October 1977. The serial introduced the robot dog K9, voiced by
John Leeson John Francis Christopher Ducker (born 16 March 1943), known professionally as John Leeson, is an English actor, voice artist and freelance wine educator. He is known for portraying Bungle in ''Rainbow'' and voicing K9 in ''Doctor Who'' and s ...
. In the serial, an intelligent virus intends to spread across the universe after finding a suitable spawning location on the moon Titan.


Plot

Some human space travellers are cruising near the outer planets of the solar system with their ship on autopilot. The
TARDIS The TARDIS (; acronym for "Time And Relative Dimension In Space") is a fictional hybrid of the time machine and spacecraft that appears in the British science fiction television series ''Doctor Who'' and its various spin-offs. Its exterior ap ...
is travelling through the same region. The crews of both ships are infected by a sentient virus which chooses The Doctor to be the host of its "mind," the Nucleus of the Swarm. The Nucleus declares Leela a reject and orders her killed. The Doctor manages to break free of his infection and tells Leela how to get the TARDIS to the nearest medical centre. At the medical station, the Doctor's doctor, Professor Marius, introduces the group to K9, a robotic dog he made to replace the real dog he had to leave on Earth. Leela and the Doctor decide to create clones of themselves, which will then be shrunk and inserted into the Doctor. There they will destroy the Nucleus and escape through a tear duct. In the meantime, Leela and K9 fight off the infected staff of the hospital. The plan goes awry, allowing the Nucleus to escape and become human sized. The Nucleus and the infected staff leave for Titan Base so the Nucleus can spawn. The Doctor realises he is cured since Leela's clone introduced her immunity factor into his bloodstream. He replicates it and gives it to Prof. Marius. The Doctor, Leela, and K9 proceed to Titan Base in the TARDIS. They fight off the infected humans, but are again without sufficient weaponry to destroy the Nucleus, or its many children, which are about to hatch as "macro-sized" beings, like the newly macro-sized Nucleus. The Doctor jams the door they are behind and rigs a gun to fire into a cloud of oxygen gas he is releasing and escapes. As intended, when the Swarm finally forces open the door, the blaster fires, igniting the oxygen in Titan's
methane Methane ( , ) is a chemical compound with the chemical formula (one carbon atom bonded to four hydrogen atoms). It is a group-14 hydride, the simplest alkane, and the main constituent of natural gas. The relative abundance of methane on Eart ...
atmosphere and destroying the Swarm and the base. When they return to the hospital, they thank Prof. Marius for the use of K9, who has ably assisted them. Prof. Marius offers K9 to the Doctor, as he is due to return to Earth, and the Doctor and Leela leave with their new companion in the TARDIS.


Production

Working titles for this story included ''The Enemy Within'', ''The Invader Within'' and ''The Invisible Invader''. It was not decided until late in the production that K9 was to be a new companion. The decision to use it in multiple serials was made partly to offset the expense that had gone into making the prop. ''The Invisible Enemy'' was filmed and recorded in April 1977. In one scene there is an obvious crack in a wall before it is fired at by K9; the crack was originally concealed, but the scene was reshot with little time left to repair the join.


Cast notes

Michael Sheard (Lowe) makes his fourth of six appearances in ''Doctor Who'', having made previous appearances in '' The Ark'' (1966), ''
The Mind of Evil ''The Mind of Evil'' is the second serial of the Doctor Who (season 8), eighth season of the British science fiction television series ''Doctor Who'', which was first broadcast in six weekly parts on BBC1 from 30 January to 6 March 1971. In th ...
'' (1971) and ''
Pyramids of Mars ''Pyramids of Mars'' is the third serial of the 13th season of the British science fiction television series ''Doctor Who''. Written by Robert Holmes and Lewis Greifer under the pseudonym of "Stephen Harris" and directed by Paddy Russell, the ...
'' (1975). Brian Grellis previously played Sheprah in ''
Revenge of the Cybermen ''Revenge of the Cybermen'' is the fifth and final serial of the 12th season of the British science fiction television series ''Doctor Who'', which was first broadcast in four weekly parts on BBC1 from 19 April to 10 May 1975. It was the first ...
'' (1975) and would later appear as the Megaphone Man in ''
Snakedance ''Snakedance'' is the second serial of the 20th season of the British science fiction television series ''Doctor Who'', which was first broadcast in four twice-weekly parts on BBC1 from 18 to 26 January 1983. The serial is set on the planet Ma ...
'' (1983). Frederick Jaeger (Marius) also played Jano in '' The Savages'' (1966) and Professor Sorenson in ''
Planet of Evil ''Planet of Evil'' is the second serial of the 13th season of the British science fiction television series ''Doctor Who''. It was first broadcast in four weekly parts on BBC1 from 27 September to 18 October 1975. The serial is set on and ab ...
'' (1975).


Broadcast and reception

The story was repeated on BBC1 on consecutive Thursdays from 13 July to 3 August 1978, achieving ratings of 4.9, 5.5, 5.1 and 6.8 million viewers, respectively. Reviewing the serial for ''
The Times ''The Times'' is a British daily national newspaper based in London. It began in 1785 under the title ''The Daily Universal Register'', adopting its current name on 1 January 1788. ''The Times'' and its sister paper ''The Sunday Times'' (fou ...
'' newspaper on the Monday following the second episode's transmission, critic Stanley Reynolds gave the story a generally negative reception. He also pointed out that in
ITV ITV or iTV may refer to: ITV *Independent Television (ITV), a British television network, consisting of: ** ITV (TV network), a free-to-air national commercial television network covering the United Kingdom, the Isle of Man, and the Channel Islan ...
regions where the series was competing with ''
Man from Atlantis ''Man from Atlantis'' is a short-lived American science fiction/fantasy television series that ran for 13 episodes on the NBC network during the 1977–78 season, following four television films that had aired earlier in 1977. Ratings success by ...
'' in the Saturday early-evening slot, it was now losing the ratings war: More recent reviews have also not been positive.
Paul Cornell Paul Douglas Cornell (born 18 July 1967) is a British writer best known for his work in television drama as well as ''Doctor Who'' fiction, and as the creator of one of the Doctor's spin-off companions, Bernice Summerfield. As well as ''Docto ...
, Martin Day and
Keith Topping Keith Andrew Topping (born 26 October 1963 in Walker, Tyneside) is an author, journalist and broadcaster. He is most well known for his work relating to the BBC Television series ''Doctor Who'' and for writing numerous official and unofficial g ...
wrote of the serial in ''
The Discontinuity Guide ''The Discontinuity Guide'' is a 1995 guidebook to the serials of the original run (1963–1989) of the BBC science fiction series ''Doctor Who''. The book was written by Paul Cornell, Martin Day and Keith Topping and was first published as ''Do ...
'' (1995), "An ambitious project which has the look of a grand folly due to budget constraints and the tongue-in-cheek script... K9 makes a quite impressive debut, though, as with many aspects of ''The Invisible Enemy'', the ideas are better than the realisation." In ''The Television Companion'' (1998),
David J. Howe David J. Howe is a British writer, journalist, publisher, and media historian. Biography David Howe was born 24 August 1961 and established himself (in the early 1980s) as an authoritative media historian through writing articles for fanzin ...
and Stephen James Walker called it one of the "weakest" Fourth Doctor stories, mostly consisting of "clichéd and undemanding action-adventure material". They also noted the inconsistent visual effects. In 2010, Mark Braxton of ''
Radio Times ''Radio Times'' (currently styled as ''RadioTimes'') is a British weekly listings magazine devoted to television and radio programme schedules, with other features such as interviews, film reviews and lifestyle items. Founded in May 1923 by J ...
'' awarded it two stars out of five, contrasting it with the
Philip Hinchcliffe Philip Michael Hinchcliffe (born October 1944) is a retired English television producer, screenwriter and script editor. After graduating from Cambridge University, he began his career as a writer and script editor at Associated Television befo ...
era and describing it as "a kidified,
Poundland Poundland is a British variety store chain founded in 1990. It once sold most items at the single price of £1, including Closeout (sale), clearance items and proprietary brands. The first Pilot (experiment), pilot store opened in December 19 ...
''
Star Wars ''Star Wars'' is an American epic film, epic space opera multimedia franchise created by George Lucas, which began with the Star Wars (film), eponymous 1977 film and quickly became a worldwide popular culture, pop-culture Cultural impact of S ...
''". He felt "many of the effects are excellent" but observed a "precarious juxtaposition" between good and bad effects and "the ambition of the serial as a whole". He praised the story as a "romping yarn" which "brings out the best in veteran designer Barry Newbery", but criticised "unbelievably incompetent" action scenes, as well as "harsh lighting" and "pristine white sets". He also commented on Louise Jameson as looking "unsurprisingly ill at ease" despite giving "her usual 100 per cent".
DVD Talk DVD Talk is a home video news and review website launched in 1999 by Geoffrey Kleinman. History Kleinman founded the site in January 1999 in Beaverton, Oregon. Besides news and reviews, it features information on hidden DVD features known as ...
's John Sinnott disliked the way K9 was used too conveniently and found the plot too similar to ''
Fantastic Voyage ''Fantastic Voyage'' is a 1966 American science fiction adventure film directed by Richard Fleischer and written by Harry Kleiner, based on a story by Otto Klement and Jerome Bixby. The film is about a submarine crew who are shrunk to microscop ...
'' (1966), but less well done. He praised the visual effects of the inside of the Doctor's head, but criticised the other sets.


Commercial Releases


In print

A novelisation of this serial, written by
Terrance Dicks Terrance William Dicks (14 April 1935 – 29 August 2019) was an English people, English author and television screenwriter, script editor and Television producer, producer. In television, he had a long association with the BBC science-fictio ...
, was published by
Target Books Target Books was a British publishing imprint, established in 1973 by Universal-Tandem Publishing Co Ltd, a paperback publishing company. The imprint was established as a children's imprint to complement the adult Tandem imprint, and became wel ...
in March 1979.


Home media

The story was released on VHS in September 2002. The
DVD The DVD (common abbreviation for Digital Video Disc or Digital Versatile Disc) is a digital optical disc data storage format. It was invented and developed in 1995 and first released on November 1, 1996, in Japan. The medium can store any kind ...
was released on 16 June 2008 with the spin-off "
K-9 and Company ''K-9 and Company'' is a one-episode television pilot, for a proposed 1981 television spin-off of the British science fiction television series '' Doctor Who''. It features former series regulars Sarah Jane Smith, an investigative journalist ...
" in a double pack called "K9 Tales". This serial was scheduled to be released as part of the
Doctor Who DVD Files This is a list of ''Doctor Who'' serials and episodes that have been released on DVD and Blu-ray. DVD Release Most ''Doctor Who'' DVDs have been released first in the United Kingdom with Region 2, and released later in Australia and Ne ...
in issue 133 on 5 February 2014.


References


External links

*


Target novelisation

*
On Target — ''Doctor Who and the Invisible Enemy''
{{DEFAULTSORT:Invisible Enemy Fourth Doctor serials Television episodes about cloning Fiction about size change Fiction set on Titan (moon) Doctor Who serials novelised by Terrance Dicks 1977 British television episodes Television episodes written by Bob Baker (scriptwriter) Fiction set in the 5th millennium Television episodes set in hospitals