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This British TV series was created by Gerry and Sylvia Anderson, the creators of ''Series/{{Thunderbirds}}'' and other "{{Supermarionation}}" fare, being produced by Lew Grade's ITC (in co-production with Italy's RAI during the first season, explaining the presence of Italian guest stars). It originally aired in the UK between 1975 and 1977, although several season one episodes were premiered in the US (like "Another Time, Another Place") and Australia (like "Ring Around The Moon"). It consisted of two seasons, each with a different approach; season one was slow-paced and cerebral, whereas season two had more "monster of the week" episodes. Its premise was simple: on September 13th 1999, a ridiculously small explosion blows the moon out of its orbit and accelerates it to a velocity sufficient to send it hurtling out of the solar system and travel interstellar distances in improbably short times.

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This British TV series was created by Gerry and Sylvia Anderson, the creators of ''Series/{{Thunderbirds}}'' and other "{{Supermarionation}}" fare, fare as well as ''Series/{{UFO}}'', being produced by Lew Grade's ITC (in co-production with Italy's RAI during the first season, explaining the presence of Italian guest stars). It originally aired in the UK between 1975 and 1977, although several season one episodes were premiered in the US (like "Another Time, Another Place") and Australia (like "Ring Around The Moon"). It consisted of two seasons, each with a different approach; season one was slow-paced and cerebral, whereas season two had more "monster of the week" episodes. Its premise was simple: on September 13th 1999, a ridiculously small explosion blows the moon out of its orbit and accelerates it to a velocity sufficient to send it hurtling out of the solar system and travel interstellar distances in improbably short times.
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** In-universe this would also include a lot of the changes between season one and two. You could ''perhaps'' justify the new jackets, tools and weapons away as just something they already had in storage but somehow they found the resources to install/renovate whole sections and departments.
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* NoPronunciationGuide: The pronunciation of ''Koenig'' was all over the place. Depending on who is talking it's either ''Kay-nig'' or ''Ko-nig.'' Helena wasn't immune either; being called ''Helen-a'' or ''Hel-lee-na'' at various points.

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Although it still retains a substantial and enthusiastic following, ''Space: 1999'' is mainly noteworthy only for its high production values; its effects work was outstanding for the period and still looks quite good today. Most of the equipment and vehicle designs are realistic (no unnecessary streamlining in the vacuum of space, no silly aesthetic flourishes), and those that move had some of the more realistic physics to grace TV until ''Series/BabylonFive'''s Starfuries (notwithstanding at least one scene that showed a stationary spacecraft ''rocking'' back and forth in space). The main problem with the series is that despite the high production values and all the acting talent (Martin Landau, Barbara Bain, Barry Morse, and many notable guest stars) in the show, they had nothing approaching consistently competent writing. The series premise is not just impossible by any understanding of science (the energies required to de-orbit the moon are on a par with those required to ''completely vaporise it''), it's downright silly. And the scripts rarely rose above the level of the first episode--they could be dramatically quite good but scientifically absurd. How it survived two seasons over three years is a wonder. (Season 1 also had some cool music by Barry Gray -- as it turned out, the last music that Gray would ever compose for Anderson. In fact, that would be his last screen work of any kind.)

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Although it still retains a substantial and enthusiastic following, ''Space: 1999'' is mainly noteworthy only for its high production values; its effects work was outstanding for the period and still looks quite good today. Most of the equipment and vehicle designs are realistic (no unnecessary streamlining in the vacuum of space, no silly aesthetic flourishes), and those that move had some of the more realistic physics to grace TV until ''Series/BabylonFive'''s Starfuries (notwithstanding at least one scene that showed a stationary spacecraft ''rocking'' back and forth in space). The main problem with the series is that despite the high production values and all the acting talent (Martin Landau, Barbara Bain, Barry Morse, and many notable guest stars) in the show, they had nothing approaching consistently competent writing. The series premise is not just impossible by any understanding of science (the energies required to de-orbit the moon are on a par with those required to ''completely vaporise it''), it's downright silly. And the scripts rarely rose above the level of the first episode--they could be dramatically quite good but scientifically absurd. How it survived two seasons over three years is absurd, although of course the mainstream audiences the show was aimed at have little interest in accurate science in their science fiction.

The massive production cost of the show meant that
a wonder. (Season 1 also had some cool music network sale in the USA was more-or-less essential. Lew Grade, the head of ITC, pulled defeat from the jaws of victory by Barry Gray -- as it turned out, raising the asking price at the last music minute in negotiations with a previously enthusiastic NBC, who called his bluff and passed. On learning of this, CBS and ABC also declined to buy it, and Grade was forced to sell it into syndication. Regardless, the ratings were successful enough that Gray would ever compose for Anderson. In fact, ITC commissioned a second season, with the provisos that would there should be his last screen work of any kind.)
an American producer and the budget should be cut. The second season was also popular enough that a third almost happened.
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** The Eagle Transports, possibly the most realistic fictional spacecraft ever created.

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** The Eagle Transports, possibly the most realistic fictional TV spacecraft ever created.created. Ersatz "Film/TwoThousandOneASpaceOdyssey" Moon Buses.
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This British TV series was created by Gerry and Sylvia Anderson, the creators of ''{{Thunderbirds}}'' and other "{{Supermarionation}}" fare, being produced by Lew Grade's ITC (in co-production with Italy's RAI during the first season, explaining the presence of Italian guest stars). It originally aired in the UK between 1975 and 1977, although several season one episodes were premiered in the US (like "Another Time, Another Place") and Australia (like "Ring Around The Moon"). It consisted of two seasons, each with a different approach; season one was slow-paced and cerebral, whereas season two had more "monster of the week" episodes. Its premise was simple: on September 13th 1999, a ridiculously small explosion blows the moon out of its orbit and accelerates it to a velocity sufficient to send it hurtling out of the solar system and travel interstellar distances in improbably short times.

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This British TV series was created by Gerry and Sylvia Anderson, the creators of ''{{Thunderbirds}}'' ''Series/{{Thunderbirds}}'' and other "{{Supermarionation}}" fare, being produced by Lew Grade's ITC (in co-production with Italy's RAI during the first season, explaining the presence of Italian guest stars). It originally aired in the UK between 1975 and 1977, although several season one episodes were premiered in the US (like "Another Time, Another Place") and Australia (like "Ring Around The Moon"). It consisted of two seasons, each with a different approach; season one was slow-paced and cerebral, whereas season two had more "monster of the week" episodes. Its premise was simple: on September 13th 1999, a ridiculously small explosion blows the moon out of its orbit and accelerates it to a velocity sufficient to send it hurtling out of the solar system and travel interstellar distances in improbably short times.
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* ExactWords: in the episode ''Earthbound'', hibernating aliens en-route to Earth programmed their ship make a pit stop on the Moon. When the Moon was blasted into deep space, the ship duly diverted to land on the Moon anyway, even though the Moon is by this time light years from Earth, [[http://tvtropes.org/pmwiki/pmwiki.php/Main/NegativeSpaceWedgie and maybe in another part of the Universe entirely]]!

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** A LOT of the aliens had hilariously odd names, especially for those who lived in the UK. Psychons ("The Metamorph") get a pass due to the nature of the plot; however the villain of "The Infernal Machine" being named Gwent (for those who don't know, a council in Wales), the entire episode "The Rules of Luton" (Luton is a town just outside London), and "One Moment of Humanity", which featured aliens called the ''Vegans'' are noteworthy examples.

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** A LOT of the aliens had hilariously odd names, especially for those who lived in the UK. Psychons ("The Metamorph") get a pass due to the nature of the plot; however the villain of "The Infernal Machine" being named Gwent (for those who don't know, a council in Wales), the entire episode "The Rules of Luton" (Luton is a town just outside London), and "One Moment of Humanity", which featured aliens called the ''Vegans'' are noteworthy examples.examples.
** To be fair, the last example doesn't really count. Vega is the name of a real star, and authors like James Blish had used the name to refer to aliens from Vega's solar system ''long'' before the word "vegan" came into use.
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** Also Balor in "End of Eternity". Not only did he ''start'' the episode he locked away for Eternity, but at the end he's blown into vacuum. Whether his HealingFactor with keep him between life and death for eternity is never addressed.

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** David Kano, Moonbase Alpha's computer expert in the first season averts this trope fairly well for a 70s series, and he certainly gets a lot more to do per episode than, say, Lt. Uhura.
** Doctor Matthias, as well, had an important role in many episodes, being one of only two doctors on the base.

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** Ben Ouma, Moonbase Alpha's computer expert in "Breakaway", the first episode. Personal conflicts with the rest of the cast actor meant that actor Lon Stratton only appeared in one episode. Rather than recast the role, the character of Ouma was replaced with...
** David Kano, Moonbase Alpha's computer expert in the rest of the first season averts season. He averted this trope fairly well for a 70s series, and he certainly gets a lot more to do per episode than, say, Lt. Uhura.
** Doctor Matthias, as well, had an important role in many episodes, being one of only two doctors on the base. Unlike Kano he returned for season two, although the character only appeared in two episodes of the final season.
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* CompleteMonster: Balor in "End of Eternity".

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* CompleteMonster: Balor in "End of Eternity".



* OurVampiresAreDifferent: "Force of Life", in that [[IanMacshane Zoref]] is a heat-seeking one.

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* OurVampiresAreDifferent: "Force of Life", in that [[IanMacshane Zoref]] Zoref is a heat-seeking one.


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* SplitPersonality: Implied in "The Infernal Machine".
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* OurVampiresAreDifferent: "Force of Life", in that [[IanMacshane Zoref]] is a heat-seeking one. To a lesser degree, Balor in "End of Eternity".

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* OurVampiresAreDifferent: "Force of Life", in that [[IanMacshane Zoref]] is a heat-seeking one. To a lesser degree, Balor in "End of Eternity".

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** A LOT of the aliens had hilariously odd names, especially for those who lived in the UK. Psychons ("The Metamorph") get a pass due to the nature of the plot; however the villain of "The Infernal Machine" being named Gwent (for those who don't know, a council in Wales), the entire episode "The Rules of Luton" (Luton is a town just outside London), and "One Moment of Humanity", which featured aliens called the ''Vegans'' are noteworthy examples.



* FlatCharacter: There's not that much to say about most of the characters beyond the ones who appear in the title sequence, although they tried harder in Season 2.

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* FlatCharacter: There's not that much to say about most of the characters beyond the ones who appear in the title sequence, although they tried harder in Season 2.2, although that still only extended as far as Tony, Alan, Sandra and Fraser.

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* {{Antimatter}}: "Matter of Life and Death"

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* {{Antimatter}}: "Matter of Life and Death"Death", "A Matter of Balance"


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* BrokenAce: "Dragon's Domain"


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* DeadManWriting: "Space Warp"
* DownerEnding: Oooh boy... Lots of 'em. "Breakaway", "Death's Other Dominion", "War Games", "Dragon's Domain", "The Testament of Arcadia", "Journey to Where", "The Dorcons" noteworthy examples.


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* EvilTwin: "Seed of Destruction"


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* {{Yandere}}: Shermeen in "A Matter of Balance"

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* ActingForTwo: "Seed of Destruction"

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* ActingForTwo: "Seed of Destruction"Destruction", "Dorzak".



* EldritchAbomination: "Space Brain". How the aliens in "War Games" view the Alphans.

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* EldritchAbomination: "Space Brain".Brain", "End of Eternity", "Dragon's Domain". How the aliens in "War Games" view the Alphans.



* HarmlessFreezing: "The Mark of Archanon". Subverted in "The Exiles", where the Alphans invoke this trope, unwittingly freeze the MonsterOfTheWeek, and are horrified by it.



* HuntingTheMostDangerousGame: "The Rules of Luton"



* IntrepidMerchants: "The Taybor"



* TheMutiny: "The Testament of Arcadia"

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* TheMutiny: "The Testament of Arcadia"Arcadia", "The Seance Spectre"



* OurWormholesAreDifferent: "Black Sun", "Space Warp"

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* OurWormholesAreDifferent: "Black Sun", "Space Warp" Warp"
* PlayingWithSyringes: "Missing Link", invoked in "The Metamorph".


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* SleeperStarship: "Earthbound", "The Exiles", "Dorzak"
* SpaceClouds: "The Beta Cloud", "The Lambda Factor"

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* AncientAstronauts: Implied in [[spoiler: "The Testament of Arcadia"]].



* AscendToAHigherPlaneOfExistence: "Collision Course"
* [[UnrealisticBlackHole Black Hole]]: "Black Sun"
* ContemporaryCaveman: "The Full Circle"



* EldritchAbomination: "Space Brain". How the aliens in "War Games" view the Alphans.



* GodGuise: "New Adam, New Eve"



* GrowBeyondTheirProgramming: "Brian the Brain"
* HumansAreTheRealMonsters: "War Games", invoked In-Universe in "The Exiles".
* ImAHumanitarian: [[spoiler: "Mission of the Darians"]], in a way, also [[spoiler: "The Metamorph"]].
* ImmortalitySeeker: "The Dorcons". Deconstructed hard in "Death's Other Dominion".



* OurVampiresAreDifferent: "Force of Life", in that [[IanMacshane Zoref]] is a heat-seeking one.

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* OurVampiresAreDifferent: "Force of Life", in that [[IanMacshane Zoref]] is a heat-seeking one. To a lesser degree, Balor in "End of Eternity".
* OurWormholesAreDifferent: "Black Sun", "Space Warp"
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* ActingForTwo: "Seed of Destruction"


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* {{Antimatter}}: "Matter of Life and Death"
* CreepyChild: "Alpha Child"


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* OurVampiresAreDifferent: "Force of Life", in that [[IanMacshane Zoref]] is a heat-seeking one.
* RipVanWinkle: "The Mark of Archanon", [[spoiler: "The Exiles"]].

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* AIIsACrapshoot: Gwent in "The Infernal Machine".



* XDaysSince: Episodes in the second season usually begin with the narration "X days after leaving Earth's orbit". The totals, however, frequently don't agree with numbers used during the first season.
* YouCantFightFate: In "The Troubled Spirit", everything the Alphans do to stop Mateo's "ghost" actually [[spoiler:causes its eventual creation.]]

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* XDaysSince: Episodes in the second season usually begin with the narration "X days after leaving Earth's orbit". The totals, however, frequently don't agree with numbers used during the first season.
season, or with each other.
* YouCantFightFate: In "The Troubled Spirit", everything the Alphans do to stop Mateo's "ghost" actually [[spoiler:causes its eventual creation.]] YouCantFightFate


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* AIIsACrapshoot: "The Infernal Machine", "Brian the Brain"


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* GodGuise: "New Adam, New Eve"


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* TheMutiny: "The Testament of Arcadia"


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* YouCantFightFate: [[spoiler: "The Troubled Spirit"]].

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* {{Gendercide}}: What the combatants in the episode "The Last Enemy" were aiming for.


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!!Trope-based episodes:

* {{Gendercide}}: "The Last Enemy"
* GiantSpaceFleaFromNowhere: "The Beta Cloud"
* InvoluntaryShapeshifting: "Space Warp"
* MadScientist: "The Metamorph"
* TimeyWimeyBall: [[spoiler: "The Troubled Spirit"]].
* VoluntaryShapeshifting: "The Metamorph", in particular.
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** Tony Verdeschi comes across as this in Season Two.

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* InfiniteSupplies: Played Straight and Averted. While Alpha has its own mining and production facilities, this isn't enough to avoid the trope. However, averted in the Season One finale, "Testament of Arcadia". Commander Koenig tells the fanatics who want to settle on a dormant planet that taking the amount of supplies they want will doom the rest of them to a slow death.

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* InfiniteSupplies: Played Straight and Averted. While Alpha has its own mining and production facilities, this isn't enough to avoid the trope. However, averted in the Season One finale, "Testament of Arcadia". Commander Koenig tells the fanatics who want to settle on a dormant planet that taking the amount of supplies they want will that they'd take would doom the rest of them to the Alphans.
* MisplacedWildlife: "The Metamorph" shows [[BrianBlessed Mentor]] having
a slow death.[[EverythingsBetterWithLions lion]] on an alien planet. Later subverted when we discover that said lion is a form assumed by Maya.
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* BigNo: Dionne has one in "The Last Enemy"


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* HumanAlien: This went to the point where "The Last Enemy" had aliens that were basically humans in biker jackets.
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* AndIMustScream: The fate of Commissioner Simmonds in "Earthbound"
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Not a spoiler


* WhatHappenedToTheMouse: The [[spoiler:first baby born on the moonbase in the episode "Alpha Child"]] is never mentioned again.

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* WhatHappenedToTheMouse: The [[spoiler:first first baby born on the moonbase in the episode "Alpha Child"]] Child" is never mentioned again.



* YouCantFightFate: [[spoiler: In "The Troubled Spirit", everything the Alphans do to stop Mateo's "ghost" actually causes its eventual creation.]]

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* YouCantFightFate: [[spoiler: In "The Troubled Spirit", everything the Alphans do to stop Mateo's "ghost" actually causes [[spoiler:causes its eventual creation.]]
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* TerraDeforming: In one episode, the Alphans make contact with Earth, where it's a couple of centuries later due to Relativity or something, and the entire population lives in domed cities because the outside environment is toxic. That exact phrase "Who needs nature" has become something of a CatchPhrase, and you get the sense that nobody on Earth is too bothered about the loss of the ecosystem.

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* TerraDeforming: In one episode, the Alphans make contact with Earth, where it's a couple of centuries later due to Relativity relativity or something, and the entire population lives in domed cities because the outside environment is toxic. That exact phrase "Who needs nature" has become something of a CatchPhrase, and you get the sense that nobody on Earth is too bothered about the loss of the ecosystem.
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Typo fix.


** Creator/BrianBlessed played Dr. Cabot Rowlan in an episode of the first season (dying at the end of it), then returned in the second season to play Maya's father (and died again).

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** Creator/BrianBlessed played Dr. Cabot Rowlan Rowland in an episode of the first season (dying at the end of it), then returned in the second season to play Maya's father (and died again).
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->''Many things—beating with a rubber truncheon, water torture, electric shock, incessant noise, reruns of ''Space: 1999''—may cause agony as they occur, yet leave no enduring injury.''

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->''Many ->''"Many things—beating with a rubber truncheon, water torture, electric shock, incessant noise, reruns of ''Space: 1999''—may cause agony as they occur, yet leave no enduring injury.''"''
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[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/space1999_1_9345.jpg]]
->''Many things—beating with a rubber truncheon, water torture, electric shock, incessant noise, reruns of ''Space: 1999''—may cause agony as they occur, yet leave no enduring injury.''
-->-- '''Frank Easterbrook''', ''[[http://scholar.google.ca/scholar_case?case=4505155886048679069 Williams v. Boles]]''

Definitive evidence that only properly trained professionals should create science fiction shows for television.

This British TV series was created by Gerry and Sylvia Anderson, the creators of ''{{Thunderbirds}}'' and other "{{Supermarionation}}" fare, being produced by Lew Grade's ITC (in co-production with Italy's RAI during the first season, explaining the presence of Italian guest stars). It originally aired in the UK between 1975 and 1977, although several season one episodes were premiered in the US (like "Another Time, Another Place") and Australia (like "Ring Around The Moon"). It consisted of two seasons, each with a different approach; season one was slow-paced and cerebral, whereas season two had more "monster of the week" episodes. Its premise was simple: on September 13th 1999, a ridiculously small explosion blows the moon out of its orbit and accelerates it to a velocity sufficient to send it hurtling out of the solar system and travel interstellar distances in improbably short times.

Somehow, during this catastrophic event the 300 persons crewing Moonbase Alpha avoid getting smeared into jelly by the sudden acceleration; once things settle down a bit, they make the best of bad situation by surviving for at least three years with no visible means of support. They also deal with all the usual [[{{Sci-Fi}} skiffy]] hackery -- AliensAndMonsters, mysterious events, the works -- without much thought to any serious science (or, often, common sense) in the resulting plots.

Although it still retains a substantial and enthusiastic following, ''Space: 1999'' is mainly noteworthy only for its high production values; its effects work was outstanding for the period and still looks quite good today. Most of the equipment and vehicle designs are realistic (no unnecessary streamlining in the vacuum of space, no silly aesthetic flourishes), and those that move had some of the more realistic physics to grace TV until ''Series/BabylonFive'''s Starfuries (notwithstanding at least one scene that showed a stationary spacecraft ''rocking'' back and forth in space). The main problem with the series is that despite the high production values and all the acting talent (Martin Landau, Barbara Bain, Barry Morse, and many notable guest stars) in the show, they had nothing approaching consistently competent writing. The series premise is not just impossible by any understanding of science (the energies required to de-orbit the moon are on a par with those required to ''completely vaporise it''), it's downright silly. And the scripts rarely rose above the level of the first episode--they could be dramatically quite good but scientifically absurd. How it survived two seasons over three years is a wonder. (Season 1 also had some cool music by Barry Gray -- as it turned out, the last music that Gray would ever compose for Anderson. In fact, that would be his last screen work of any kind.)

A fan-produced featurette, "Message from Moonbase Alpha" (written by regular series writer Johnny Byrne, starring Zienia Merton as series regular Sandra Benes, using footage from the series and done with permission of the copyright holders, therefore ''almost'' being canonical) eventually established that the Moonbase crew found an Earth-like planet to live on.
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!!This show provides examples of:

* AIIsACrapshoot: Gwent in "The Infernal Machine".
* AbsenteeActor: When producer Fred Freiberger came on board he set up a system where from time to time two episodes would be filmed simultaneously for scheduling purposes, specially scripted so that key regulars would have a minimal presence in one episode while taking centre stage in another. The most notable pairing was "Dorzak"/"Devil's Planet" - Martin Landau does not appear at all in the former, while he's the main character in the latter.
* TheAce: In "Dragon's Domain", Koenig says Tony Cellini used to be this, before the Ultra Probe mission messed him up.
* AliensAndMonsters
* AliensSpeakingEnglish: Some even write in English.
* ApocalypseDayPlanner: September 13th, 1999
* AppliedPhlebotinum
* ArtificialGravity: The moonbase is equipped with "gravity shields" that provide artificial gravity, let spacecraft take off and land on planets without refueling, and allowed the moon to fly through a black hole (!). The shields stop working every time they would be detrimental to the plot.
* BilledAboveTheTitle: Martin Landau and Barbara Bain.
* CaptainsLog:
** Dr Helena Russell, starting with season two.
** Also used in two first season stories, "Dragon's Doman" (with Dr. Russell) and "Testament of Arcadia" (with Commander Koenig).
* ChuckCunninghamSyndrome: Paul Morrow, David Kano, and Tanya Alexander disappeared between seasons with no on-screen explanation (though a tie-in annual feature stated that Morrow was killed in an Eagle crash). Professor Bergman also disappeared between seasons, but not without explanation; a dialogue exchange in "The Metamorph" (the opening episode of Season Two) confirms that Bergman died previously due to a spacesuit malfunction.
* CompilationMovie: This series was edited into several of these. One, ''Cosmic Princess'', was featured in an early season of ''Series/MysteryScienceTheater3000''.
* CoolOldGuy: Victor Bergman
* CoolStarship:
** The Eagle Transports, possibly the most realistic fictional spacecraft ever created.
** And their military counterparts, the Mark IX Hawks from "War Games".
* DemotedToExtra:
** Sandra Benes seemed poised to suffer this fate as Season Two went on.
** Robert Mathias did.
* EverythingIsAnIpodInTheFuture: The interiors of Moonbase Alpha and the uniforms worn by the Alphans (especially the more unisex versions in season one).
* FailureIsTheOnlyOption
* FixFic: The "Message from Moonbase Alpha" featurette.
* FlatCharacter: There's not that much to say about most of the characters beyond the ones who appear in the title sequence, although they tried harder in Season 2.
* {{Gendercide}}: What the combatants in the episode "The Last Enemy" were aiming for.
* HumansAreTheRealMonsters: The Alphans encounter many HigherTechSpecies (usually of the CrystalSpiresAndTogas sort) who fear contamination or conquest by our [[HumansAreWarriors backward, warlike species]].
* InfiniteSupplies: Played Straight and Averted. While Alpha has its own mining and production facilities, this isn't enough to avoid the trope. However, averted in the Season One finale, "Testament of Arcadia". Commander Koenig tells the fanatics who want to settle on a dormant planet that taking the amount of supplies they want will doom the rest of them to a slow death.
* MonsterOfTheWeek: The second season became this, upping the action quota and de-emphasizing the psychodrama, to the dismay of some fans and the delight of others.
* NeckLift: Peter Bowles as Balor in "End of Eternity".
* OmnidisciplinaryScientist: Professor Bergman and later Maya.
* PlanetOfHats
* PowerPerversionPotential: Deliberately invoked and [[LampshadeHanging lampshaded]] by [[VoluntaryShapeshifter Maya]], and played primarily for comedic value.
* RecycledSoundtrack: And then some, with music from other Gerry Anderson shows (and assorted library pieces) being used to bolster the few episode scores Barry Gray composed for season one. (Derek Wadsworth also only did about five episodes in season two, and they were reused as well.)
* RememberTheNewGuy: Tony Verdeschi and Bill Fraser in Season Two.
* RubberForeheadAliens and HumanAliens: Both averted and played straight. Justified with Maya, as she's a VoluntaryShapeshifter.
* SciFiWritersHaveNoSenseOfScale: The moon was variably described as being billions of kilometers, miles, and light-years from Earth, resulting in roughly equal difficulty in returning despite the fact that the first case would put the moon closer to Earth than Saturn, while in the latter case the moon would be vastly more distant from the Milky Way galaxy than the Great Wall, currently the largest known feature of the universe. It (the moon) passed between star systems at speeds fast enough that the passengers went through a star system per week, yet remained close enough to each and slow enough to reach a planet via shuttle for days at a time.
* ShinyLookingSpaceships: Averted with the Eagle Transporters, thoroughly unglamorous work vehicles, kind of like dump trucks in space.
* SpaceClothes: Not as bad as some examples, but still ''very'' 70s. The second season actually managed to tone them down by adding a jacket to the basic moon base uniform.
* SpaceIsNoisy: Spectacularly in "The Last Enemy".
* SpaceOpera
* StarfishAliens: Any alien encounter that wasn't a HumanAlien or RubberForeheadAlien.
* TerraDeforming: In one episode, the Alphans make contact with Earth, where it's a couple of centuries later due to Relativity or something, and the entire population lives in domed cities because the outside environment is toxic. That exact phrase "Who needs nature" has become something of a CatchPhrase, and you get the sense that nobody on Earth is too bothered about the loss of the ecosystem.
* TokenMinority:
** David Kano, Moonbase Alpha's computer expert in the first season averts this trope fairly well for a 70s series, and he certainly gets a lot more to do per episode than, say, Lt. Uhura.
** Doctor Matthias, as well, had an important role in many episodes, being one of only two doctors on the base.
* TwentyMinutesIntoTheFuture: The story kicks off on September 9th, 1999.
* VoluntaryShapeshifting: Maya, who has the ability on her own. Her father, who's played by Creator/BrianBlessed, has a computer that can do this to larger objects and, potentially, a whole planet.
* WagonTrainToTheStars
* WhatHappenedToTheMouse: The [[spoiler:first baby born on the moonbase in the episode "Alpha Child"]] is never mentioned again.
* XDaysSince: Episodes in the second season usually begin with the narration "X days after leaving Earth's orbit". The totals, however, frequently don't agree with numbers used during the first season.
* YouCantFightFate: [[spoiler: In "The Troubled Spirit", everything the Alphans do to stop Mateo's "ghost" actually causes its eventual creation.]]
* YouLookFamiliar: Multiple instances; but no guest played more than two different characters.
** Most notably, Catherine Schell guest-starred in first-season episode "Guardian of Piri"; then in the second season, joined the regular cast as [[MsFanservice beautiful]] [[RubberForeheadAliens alien]] [[VoluntaryShapeshifting metamorph]] Maya.
** Creator/BrianBlessed played Dr. Cabot Rowlan in an episode of the first season (dying at the end of it), then returned in the second season to play Maya's father (and died again).
** Isla Blair and Stuart Damon also play two different characters each.
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