[[quoteright:250:http://static.tvtropes.org/pmwiki/pub/images/alien-nation_5652.jpg]]
''Alien Nation'' is a BuddyCopShow with a SitCom twist: the minority partner is a space alien. A human detective named Matthew Sikes is partnered with an alien immigrant named George Francisco to solve crimes arising from the uneasy relationship between the "Newcomers" and their human neighbors. The television series, based on the film ''Film/AlienNation'', lasted for 22 episodes from September, 1989 to May, 1990. Five television movies were later produced, released between 1994 and 1997.

As the story goes, at some point [[TwentyMinutesIntoTheFuture in the early 1990s]], a malfunctioning starship loaded with a population of 250,000 alien slave laborers landed in the desert outside Los Angeles. The Newcomers (their real name is the Tenctonese) were remarkably adaptable to new information and environments. They are extremely strong and can learn quickly. They become intoxicated from [[AlienCatnip spoiled milk]], and [[KillItWithWater their flesh burns when exposed to seawater]].

The Newcomers had two personal names, the one that they were given by their parents or former masters, and an "Earth name" handed out by the immigration service. With 250,000 names to distribute, and some of the officials apparently having had a quirky sense of humor, some of the names are quite odd. George's name was originally "Sam Francisco", but he changed it at Matt's request. Other odd Newcomer names: "Dallas Fort-Worth", "Amos N. Andy", "Polly Wannacracker", "Thomas and Alva Edison".

The situation of the Newcomers is a clear parallel to many other immigrant populations throughout history. They are isolated by their culture and language, and have to strike a balance between assimilation into Earth culture and maintaining their roots. They experience discrimination, and are forced into jobs as laborers in hostile environments. They are accused of "Takin' our Jobs!" by many blue-collar types.

Matt himself is initially very bigoted towards Newcomers, but as is typical for such a plot, he learns to accept his new partner. He even ends up in a [[InterspeciesRomance serious relationship with a Newcomer woman, Cathy Frankel]].

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!!This show provides examples of:
* AbortedArc: A couple in the jump from pilot to series, and from series to TV-movies. A sampling:
** The plot-thread about a virus crossing from Newcomers to humans in the pilot is never mentioned again.
** The kicker of the pilot is that an Overseer conspiracy is responsible for the death of Sikes' previous partner. While the Overseers do show up later in the series, they have nowhere near the level of power implied by the pilot, nor is murdering Sikes' partner ever brought up again.
** In the last few episodes of the series, Buck becomes close with a social activist teacher; in the series finale, they begin an affair. Not only is this never brought up again, in the second TV-movie, Buck is joining protests against human/Newcomer mating. (The novelization of the first movie attempts to smooth this out with her telling Buck it wouldn't have lasted, and moving elsewhere)
* AdaptiveAbility: The Newcomers were a slave race bred to adapt to ''any'' environment; Earth is a tough one for them, though...
* AffablyEvil: The Purist leader in the series finale and first movie is a genuinely sweet old lady who is orchestrating genocide by bioweapon.
* AlienAmongUs: The Tenctonese[=/=]Newcomers are refugees and slaves. In this case it was over 100,000 aliens, who form their own community in Los Angeles. Therefore the cultural misunderstandings went both ways, as humans learned to deal with odd newcomer traditions.
* AlienArtsAreAppreciated:
** One of the TV movies had Cathy moving in with Matt and decorating the place with clown paintings and figurines. It turns out that clowns are pretty popular with the Tenctonese, partly because they're so colorful, and partly because the Tenctonese have never seen anything like them.
** In the series, Cathy can't understand how Matt can watch something as violent as ''Film/TheThreeStooges'', and recommends a really great movie... ''Film/TheLoveBug''.
* AlienLunch
* AlternateHistory: Because the aliens landed TwentyMinutesIntoTheFuture when the original movie was made, by the time of some of the later episodes and movies of the series, technology has progressed very differently. In the most recent one, the internet and interaction technology have obviously taken huge leaps forward, but everyone was still using CRT monitors well after most of the "real" world had switched to flatscreen.
** Also, apparently the ERA passed at some point and Puerto Rico is a US state.
* TheAlternet: The Optinet in the TV movies that presumably take place TwentyMinutesIntoTheFuture from the 1990s, when more "futuristic" technology shows up. It looked like graphical MS-DOS.
* AppliedPhlebotinum
* AsYouKnow: "Millennium" does this to recap the episode where Sikes and Francisco found the Portal. Justified a little bit in that the episode in question was broadcast 6 years earlier and happened in-universe 3 years earlier, but it's still pretty blatant.
* BewareTheNiceOnes: George is polite, mild-mannered, and rule-abiding. Until you push him that inch too far, and then you're gonna be ''very sorry''.
* BitchInSheepsClothing: Betsy Ross is a successful entrepreneur and pillar of the Newcomer community. In fact, she's a ruthless drug kingpin. But the real kicker is that she's one of the Overseers.
* BizarreAlienBiology: The basis for 1/4 of the show's humor. Newcomers can't get near saltwater, it's like taking a bath in battery acid for them. They blink when they sneeze. Partway through a pregnancy, the female transfers the natal pod to the male. Instead of getting headaches, their feet swell when under stress. Their bodies cannot process cooked meat proteins (they can eat it, but they don't get anything out of it), so they eat their food raw.
* BizarreAlienSexes: Newcomers have a third, also male-looking sex called Binnaum, who are necessary for catalyzing a pregnancy. Binnaums offer a high-demand service, but make up a very small percentage of the population.
* BlackAndGrayMorality: Examined in "Night of the Screams". The Overseers win no prizes at all for their abuses, but the Newcomer [[spoiler:murdering them on Earth]] isn't exactly brimming over himself with sweetness and light.
-->'''Paul Revere:''' Are you our future, George? Tempered by laws we didn't write.
-->(later)
-->'''Paul Revere:''' The humans can never share the horror the Overseers created for us. How can they possibly write laws to exterminate them?
* BlackLikeMe: ''Slag Like Me'', an ExpandedUniverse novel in which a human reporter goes undercover as a Newcomer and reports on their experiences. Matt and George wind up having to investigate the murder.
* BluntMetaphorsTrauma: Most of the Newcomers. George and Cathy especially flub a lot of expressions around Matt.
* BrokenPedestal: [[spoiler: The cop who taught Matt in the force]] frames George for stealing drugs. And of course, RedemptionEqualsDeath.
* BuddyCopShow
* BugWar: A hate group attempts to invoke this trope, claiming the Newcomers are actually the pupa stage of a race of giant killer beetles. Turns out the giant bug was just some hired goon in a costume.
* ButICantBePregnant: In the ExpandedUniverse novel ''Cross of Blood'', Tenctonese Cathy Frankel turned out to be pregnant. This came as a shock to her human boyfriend Detective Matt Sikes, because among the Tenctonese, pregnancy can only occur when the female is inseminated by a "third" gender or "catalyst." It is later discovered that, due to their genetic adaptability, a Human/Tenctonese pairing can result in pregnancy. [[spoiler: Unfortunately, [[TearJerker Matt and Cathy's child was unable to survive after being born, due to her mixed genetics]].]]
* ByTheBookCop: George Francisco.
* CardCarryingVillain: Many former Overseers were portrayed in the series as [[EatsBabies baby-eating monsters]], and few have regrets about their past (or present) misdeeds.
** While uncommon, penitent Overseers do exist. In one episode, George speaks with a penitent former Overseer who wears a headscarf to indicate her atoning status.
** In the ExpandedUniverse novels one of the FBI agents George deals with is an Overseer, who, according to the canon established in the TV movies, was vetted by a truth and reconciliation commission such that all Overseers are either: behaving, in prison, or dead.
* ChildSoldiers / {{Tykebomb}}: The Udara "seeded" sleeper agents to fight the Overseers during slavery, many of whom were children, including [[spoiler: Emily]].
* ChekhovsSkill: In one of the ExpandedUniverse novels, George starts seeing anagrams for every word he sees, English or Tenctonese. [[spoiler:This lets him deduce that a shadowy cabal of Overseers are 'hiding in plain sight' as the Serovese Corporation.]]
* ChuckCunninghamSyndrome: In the pilot, Emily is befriended by Molly, daughter of the Francisco's neighbor. Despite appearing in the opening credits in the first half of the series, Molly never appears again.
** Halfway through the series, along with Molly, two other characters are removed from the opening credits; Burns the reporter is a major character in one later episode, but fellow detective Dobbs is never seen again.
* CloudCuckoolander: Albert Einstein.
* ConLang: Tenctonese (in reality, not in-universe).
* CoolShades: George frequently wore these. Also, Buck. This, along with the sometimes absurd-looking outfits Buck tended to wear, makes the TV series an UnintentionalPeriodPiece of the 1990s.
* ComeAlone
* {{Continuation}}: After the series was canceled, the story was continued in a series of [[TieInNovel Tie-In Novels]]. Two of them (''Dark Horizon'' and ''Body and Soul'') were based on unfilmed scripts, which were later made into [[MadeForTVMovie Made-for-TV Movies]].
* CorruptCorporateExecutive: In "Gimme Gimme"; the textile manufacturer's factory has numerous workplace safety violations and pays their workers as little as he can legally get away with.
* DateRape: Emily is almost the victim of this in the third movie.
* DeadPartner: Bill Tuggle, killed in the original movie.
* DeathWorld: Earth is practically one of these for the Tenctonese; see the explanation for Weaksauce Weakness.
* DefusingTheTykebomb: Susan does this to [[spoiler: Emily, just in the nick of time]]
* DesperatelyLookingForAPurposeInLife: Buck. So much.
* DontYouLikeIt: Inverted: If you give flowers to the Tenctonese make sure the roots are intact. Dying flowers are unpleasant.
** In one of the movies, a Purist poisons Emily and Susan with infected flowers, and he's shown buying them at a stand and asking specifically for live flowers as a gift for Newcomers. The cut flowers Matt brought to the hospital were especially inappropriate because of the Tenctonese practice of surrounding a sick person with living things, even animals.
* EasterEgg: Perps or witnesses in the background of the police station were usually {{Exp|y}}ies for famous people. For instance, around minute 38 in the Udara Legacy, you see [[RayCharles a black man in a tuxedo wearing sunglasses, being lead by the hand to a chair.]]
* EvilCannotComprehendGood: On at least one occasion, a former Overseer was astonished that George, a former slave, would risk himself to protect a former Overseer.
* EvilDetectingBaby: Vessna starts to cry when she's near Ahpossno, and she's right about that, since he's an Overseer scout send out to find the ca. quarter-million wayward Tenctonese and wouldn't say no to a coupla millions of humans as slaves, either.
* ExoticEquipment: Newcomer genitals.
* FantasticRacism: Pretty much every one of the RaceTropes known to man applied perfectly straight.
** The "Kleezantsun" (Tenctonese for "Overseers", those who maintained order among the slaves on the ships) regard the other Tenctonese as inferior and even use Human anti-Tenctonese slurs to refer to them ("slag") and to separate themselves from the "dregna" (Tenctonese for "cargo", an Overseer slur referring to Tenctonese under their control).
** Special notice must be given to "The Enemy Within," the fourth movie, which deals with the FantasticRacism the Newcomers feel towards the Eenos, an untouchable class of Newcomers. The Eenos were the ones given the most disgusting jobs on the slaveship, such as to do with wastes and the dead. The other Newcomers like to believe that there is something dirty about the Eenos themselves, rather than admit that they would have done the same things if forced to by their slavemasters.
* FantasticSlur: Human bigots (or Overseers) refer to Newcomers as "slags" or "spongeheads". Humans, in return, are called "Terts."
* FauxAffablyEvil: [[spoiler:Jennifer]] in the third TV movie.
* FiringInTheAirALot: In the series pilot, Sikes fires into the air multiple times to break up a Purist rally.
* ForeignCussWord: Inverted, in that in the Tenctonese language, "Sikes" roughly translates as "excrement cranium" ("shithead").
* PardonMyKlingon:
** After Emily had to give up her TV set, she gives her parents some mouthfuls of explicit stuff (It was not translated from Tenctonese and the subtitles contained [[SymbolSwearing random punctuation characters]] instead).
** After hearing a "[[FantasticRacism Purist (Guys, who hate Tenctonese)]]" droning on, he said something really vulgar... In Tenctonese.
* GettingCrapPastTheRadar: During a crisis (Purists trying to annihilate the Tenctonese with a bio-weapon), George says, that he "can't sit around in the hospital [where his wife and daughter are, due to said virus] with Moby Dick in his hand". [[DontExplainTheJoke Sikes doesn't need an explanation.]]
** Susan once said, that she 'feels like an old screw' [[BluntMetaphorsTrauma (the right expression would be "like an old shoe")]]. In the same TV movie, Emily said "no duh", after her mother stated something extremely obvious.
* GratuitousRussian: A few "Tenctonese" words are obviously derived from Russian, such as
** "jabluka" (after the Russian word "jabloko", meaning "apple"), the horrible Tenctonese drug from the pilot movie (It is spelled ''jabrokah'' in the novels, though.)
** "Gruza", the name of the slave ship (after the Russian word "gruz", meaning "cargo". "Cargo" is an Overseer slur referring to Tenctonese under their control)
** "serdso" (after the Russian word "serdcе", meaning "heart"), a religious object of the Tenctonese. Tenctonese believe that their souls leave their bodies in their sleep and that a serdso guides them back.
** "bardok" (from the Russian word "bardak", meaning "disorder"), rosto (from the Russian word "rost", meaning "growth [in height]") and "yunost" (from the Russian word "yunost'", meaning "youth", probably a nod at the fact, that a certain Tenctonese organ has an rejuvenating effect, when implanted in humans), enzymes from the Tenctonese metabolism.
** "Ahpossno" (from the Russian word "opasno", meaning "dangerous"), a fitting name for the Overseer scout, who came to Earth to investigate the disappearance of a quarter-million "cargo", although he saves the Tenctonese from a annihilation attempt by bio-weapon from a Purist group ([[PragmaticVillainy out of self-interest; the Overseers don't profit from dead "cargo"]]).
** "Chekkah" (from the Russian abbreviation "chekkah", a colloquial name for one of the forerunner-organisations of the infamous KGB), an elite Overseer reconnaissance unit. Ahpossno is a memeber of this unit.
** "Karabla" (from the Russian word "karabl' ", meaning "ship") a religious object used in Tenctonese marriage ceremonies (the spouses place their "serdsos" (see above) in the karabla to symbolize their marriage as a journey of two souls together), shaped like a ship.
** The Tenctonese name of the wife of Albert Einstein, the police precinct janitor, is "Okiana" (from the Russian word "okean", meaning "ocean").
** The word word 'miliciya' and means in Tenctonese, like it meant in Russian, "police"
* GoodCopBadCop: George Francisco and Matt Sikes, respectively. But hilariously reversed in 'Contact' against an Anti-Newcomer suspect.
* GreenSkinnedSpaceBabe: Take your pick of Cathy or Susan: pinkish-hued, bald, and spotted, Tenctonese women were surprisingly attractive.
* GRatedDrug: Newcomers get intoxicated on sour milk. The yeast-fermented stuff that we humans prefer has no effect on them.
* GRatedSex: Tenctonese [[FantasticArousal erogenous zones are entirely different]] from humans (shoulder blades, wrists, temples), enabling them to make out on network TV.
* HalloweenEpisode: A surprisingly scary one. "Tagdot is among us."
* HappilyMarried: George and Susan
* HeelFaceTurn: The Overseer scout ultimately makes one. He returns to the main fleet and informs them that the escapees to Earth all died of the disease he's caught himself, not only making them think there's nothing to recover, but that the planet itself is a DeathWorld for them.
* HumanOutsideAlienInside: Although they look moderately similar to humans, Tenctonese cannot metabolize cooked protein, so most of their diet consists of raw animals. See also the entries for GRatedDrug and WeaksauceWeakness.
* HumansAreTheRealMonsters: A lot of them are racist towards the Newcomers.
** The Tenctonese aren't necessarily any better and [[NotSoDifferent the racism not only goes both ways, but exists within their own species.]]
** Many of the Tenctonese, especially George, believe that HumansAreSpecial because they welcomed the Newcomers into their world, gave total freedom to a species bred to be perfect slaves, and asked no more of them than they would of themselves. Racism aside, that's pretty damn impressive.
* ICantBelieveItsNotHeroin: The newcomers get drunk on sour milk.
* InnocentInnuendo: Susan gives George a "hummer", which simply involves her making a humming noise over his back.
* InsufficientlyAdvancedAlien: As a slave race, that wasn't their ship or their tech. Thus, they end up no more advanced than humanity.
* {{Irony}}: Matthew Sikes lays this on with a trowel in his first speech as a rather heavy-handed but effective {{Aesop}} for the Purists.
* JerkWithAHeartOfGold: Sikes is a bit of an ass throughout the story, but he does have moments of compassion, heroism and thoughtfulness.
** Grazer has more of a focus on the "jerk" part of the equation, but it's clear he cares about his officers (and Albert) very much.
* KnightTemplar: a few, such as [[spoiler: the old Newcomer man who hunts down Overseers and kills them]] and [[spoiler: the leader of the binnaums who has those who leave his order killed]]
* LovePotion: The Sardonac drug.
* LysistrataGambit: Tenctonese are implied to be [[PlanetOfHats culturally]] more rational about sex; it happens, it's enjoyable, it shouldn't be taken lightly (they find oversexualized things such as pornography silly), and it doesn't matter what gender ''both'' partners are. One of Susan's coworkers boasts about the effectiveness of this technique, just as a rather complicated issue pops up. Susan is curious, but by the end of the episode the woman is divorced: her husband just became sick and tired of being screwed with, to the point where he said "Take as much money as you want, just never come near me again!"
* MakeAWish: Subverted in the first TV Movie, when Sikes, in the way to the hospital, where Emily and Susan are after a bio-weapon attack with poisoned flowers, sees a shooting star and thinks, "It'll bring luck..." It won't, it is a scout from the Overseers, who want to bring the quarter-million Tenctonese back with superior military technology and won't be too sad about some millions of human slaves as a bonus.
* MaybeMagicMaybeMundane: Sikes is killed by a Newcomer robbing a convenience store, but suddenly, after a vision of the robber touching his chest, Sikes comes back to life. George gives him an alternate medical explanation, but Sikes thinks the robber has some sort of mystical powers. When they catch the robber, he portrays himself as a combination Messianic figure/Robin Hood out to save the world, and offers to show Sikes his powers. Unusually for this trope, by the end of the episode one of the explanations is disproved [[spoiler: the robber had no mystical powers, he was just trying to get a chance to escape]] we aren't given any sort of conclusive answer, aside from the rather lackluster medical explanation.
* MeaningfulName: Ahpossno, when he gets his "human name", gets called [[{{Anvilicious}} "Norman Conquest"]].
* MessianicArchetype: Peter Rabbit tries to depict himself as one of these [[spoiler: but it turns out to be a subversion, as he was just using his claim of messianic abilities as a way to escape from Sikes]]
* MisterSeahorse: During pregnancy, Newcomer babies are transferred from the women to the men, who are the ones who actually give birth.
* NicknamingTheEnemy: Bigots refer to the Newcomers as "Slags".
* NoBiochemicalBarriers: The Newcomers may eat weird stuff, like raw beaver and wood chips, but it's all Earth-originated.
* OddCouple: Matt and Cathy.
** More traditionally, Matt and George.
* OminousFloatingSpaceship: The Newcomers' spaceship for its first appearance.
* PoliceProcedural: With a twist.
* PowerOfLove
* PunBasedTitle
* PunchAWall: Newcomers are ... stronger than humans.
-->'''Sikes:''' I hope they don't charge us for that table.
-->'''George:''' Do you think they might? I only tapped it.
* PunnyName: Most of the Newcomers, including George (whose human name officially was "Sam Francisco"). Explained as the immigration authorities getting burned out assigning names to the Newcomers and resorting to a form of sarcastic humor. Likewise with the [[PunBasedTitle title of the series itself]].
* PunyEarthlings: The Newcomers have great strength, stamina, durability, ability to survive in environments humans can't, extra hearts, and if they overdose on an [[FantasticDrug extraterrestrial]] [[PsychoSerum narcotic]], they transform into [[AxCrazy murderous, supercharged berserkers]]. But they do have a [[WeaksauceWeakness strange weakness]] or two: [[KillItWithWater Water with high salinity burns them like sulphuric acid burns naked mole rats]] and they get [[AlienLunch stinking drunk from sour milk]].
** And in the books it comes up they don't handle cold well at all: evidently their common buyers favored hot, dry worlds and they've been adapted to deserts. This is a minor factor contributing to their continued concentration in Los Angeles.
* TheRevolutionWillNotBeCivilized: The Udara.
* RetCon: In the transition from Movie to TV Series, the actors were recast and the ages of relative ages of Matthew Sikes and his daughter were changed. George's family grew and his children were aged up with Matt's daughter was aged down to a teenager for the series. Events from the movie, however, were referenced several times in the two-hour Pilot Episode, and some footage was reshot and spliced with footage from the movie for flashbacks, now featuring the younger Matt Sikes of the series in place of James Caan, who played the character in the original movie. When the series was revived in the form of TV Movies, CanonDiscontinuity was again selective: Emily, George's young daughter, was aged up to a teenager while Buck, the older son, didn't seem to age between the series and the first TV movie, nor did Baby Vessna. Additionally, the "bacteria" of the series finale was recast as a virus for the first TV movie. These discrepancies can only be solved by the application of the LiteraryAgentHypothesis. Also, the color of Tenctonese blood was made pink in the TV show and the TV movies, probably to appease censors, whereas it was the same color as human blood in the original movie.
** The male Tenctonese design was also changed (at least for George) from being much burlier than a typical human male, to being the same body form range as human males. They're still just as strong as ever.
* RidiculousFutureSequelisation: A common gag.
* RubberForeheadAliens
* RussianRoulette: Tenconese style (George explicitly referred to RussianRoulette, when he described the "game"). In episode 10, they reveal a gruesome "game" from the time of slavery: Two Tenctonese sit at opposite and of a rotating machine, that either sprays normal water... Or salt water (like hydrochloric acid to Tenctonese).
* ScienceIsBad: In episode 2, the criminal was a human scientist who was extracting a gland from his Newcomer patients in order to reverse aging in his human ones, which killed the Newcomers. At the end of the episode Matt burns his research, invoking this trope in combination with HumansAreBastards, saying essentially that while a more ethical scientist could probably have done something good with it, he couldn't trust that someone couldn't have used it to do something worse
* ScrewedByTheNetwork: Was cancelled by Fox after its first season, despite being quite popular. At the time Fox was losing a lot of money and needed to cut production on numerous shows. They saw more profit in their comedy shows, so the dramas--like Alien Nation--were cut.
* ShamingTheMob: In the pilot, when a group of 'concerned parents' tries to keep Emily out of her school, Sikes lets them all have it. This may be one of the first times Sikes himself treats a Newcomer with any respect, but he does have limits.
** The video is [[http://www.youtube.com/watch?v=G0tqK8DDjGU here.]] Following the verbal smackdown, Sikes asks them all, "Aren't you ashamed of yourselves? Aren't you?" [[spoiler: A black protester, of age to have seen racial integration of public schools first hand, can't answer.]]
*** Doubles as a CrowningMomentOfAwesome.
* SmugSnake: A lot of the Overseers; in one episode, one that's been living in a flophouse can't help but sneer at George after the guy saved his life.
* StandardFemaleGrabArea: Not exactly a hit, but close, when used by Overseer Rigac on Cathy... After seizing her by the throat.
* SuperStrength: The Newcomers were bred for it.
* TeacherStudentRomance: Buck and his English teacher start making out near the end of the last episode of the series. This storyline is not continued in the TV-Movies. (It ''is'' addressed in the novelization, however.)
* TheDreaded: [[spoiler:Chorboke]], who was thought to have died on Earth.
* TheyWalkAmongUs
* ThreeStoogesShoutOut: Part of the episode "Chains of Love" deals with Matt trying (unsuccessfully) to get Cathy to appreciate the Stooges. In that episode is a Newcomer with the seemingly normal name Ted Healy. Anyone conversant with the history of the Stooges knows that Ted Healy is credited with creating them.
* TitleDrop: When a Tenctonese stole an Overseer mind control gas, she said that "With this I can control an ''alien nation''."
* TooDumbToLive: The guy who tries to seduce Emily in the third TV movie. This is idiotic to begin with, given that sexually experienced inter-species couples need months of classes to have sex safely. But wait, it gets better. After getting her to come to his house, he goes to the next room to have a phone conversation in which he brags about how he's going to "shag the slag". Emily, like all Newcomers, has superhuman hearing. Oops. But the kicker? After she finds out what he's up to, he assaults her, despite the fact that A: she has superstrength, and B: her ''father is a cop''.
* TwentyMinutesIntoTheFuture
* UnusualEuphemism: The aliens use the term "sikes", which is later revealed to literally translate as "excrement cranium" ("shithead"). Coincidentally, the main human character is named [[InMyLanguageThatSoundsLike Sikes]]...
* WeaksauceWeakness: Newcomer flesh dissolves on contact with ''[[KillItWithWater salt water]].'' When they first arrive, they can't even leave the ship's crash site in California due to the salt content of Earth's atmosphere. They slowly build up resistance, and after a few years can live comfortably in coastal air. However it's still often a plot point, because salt is such an easy and safe weapon for humans to use against the physically superior aliens. One Newcomer is assassinated by hitmen dumping rock salt in his swimming pool, and Emily is nearly blinded by a thug with a ''squirt pistol''.
** Uncle Moodri [[CharlesAtlasSuperpower accelerates this adaptation]] until he can ''stand in the ocean'' via his spiritual powers.
*** It is not necessarily a supernatural power of his. Somewhere in the show was mentioned, that all Newcomers (everyone younger, at least) was born on the ship and that they were genetically engineered, except elders like him, who were born on the home planet. So it can very well be, that this weakness to salt water was put into the genome of the slaves to keep them under control, since, probably, there was not much salt water on the ship, so they still could work efficiently as slaves.
* WhatHappenedToTheMouse: Vessna basically disappears after the second movie.
** Explained in the first movie: Newcomer infants enter a cocoon at around a year old that [[SarcasmMode protects the writers from having to mention them for the rest of the TV movies]].
* [[WellIntentionedExtremist Well-Intentioned Extremists]]: the Udara, a resistance movement against the Overseers during enslavement, who used any means necessary, up to and including creating sleeper agents (many of whom were children).
* WickedCultured: Ahpossno, the Overseer scout, who wants to bring back the ca. quarter-million Tenctonese to slavery and also enslave all of humanity, likes music and nice house decoration and is highly knowledgeable in his culture.
* YiddishAsASecondLanguage: An old doctor George and Matt interview about stolen Newcomer blood just keeps on spouting off in Yiddish. George's face as he tries to follow the conversation is hilarious.
* YourTerroristsAreOurFreedomFighters: In the final movie, George and Susan have basically this argument about the Udara.
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