* AdaptationDisplacement: At this point, any individual who talks about "The Hidden" is more likely talking about the game mod based on the film than the film itself.
* BestKnownForTheFanservice: For ''Series/BabylonFive'' fans, this is the movie where Creator/ClaudiaChristian plays a stripper.
* CompleteMonster: The unnamed [[PuppeteerParasite parasitic lifeform]] takes over the bodies of other sapient beings so that it can go on a violent crime spree, taking whatever it wants and killing anyone who gets in the way, purely for fun. The host bodies are discarded by the alien when they finally become so damaged that it needs to [[BodySurf jump into a new host]]. During its [[SpreeKiller murderous rampage]] throughout Los Angeles, it kills many dozens of people through methods varying from shooting, bludgeoning, stabbing, and vehicular homicide, having no compunctions with murdering children or the infirm either. The good body-controlling alien in the film, an [[SpacePolice extraterrestrial police officer]], has been pursuing the evil alien ever since it killed his family and his police partner on another planet, which the evil alien is only too happy to remind him of when they confront each other. The alien's ultimate plan is to take over the body of a U.S. Senator so it can become PresidentEvil.
* EvilIsCool: The AxCrazy alien antagonist, due to its taste in [[SugarWiki/AwesomeMusic heavy metal music]], [[CoolCar fast Ferrari sports cars]] and being a chilling CreepyMonotone MadeOfIron ImplacableMan alone.
* FanonDiscontinuity: Sequel? What sequel?
* HilariousInHindsight:
** Creator/KyleMacLachlan plays an alien protector who arrives on Earth to defend it from an alien threat, decades later, Kyle would voice the [[Franchise/{{Superman}} iconic extraterrestrial guardian that we all know and love]] who would also join with the other heroes to fight another alien threat in the direct-to-DVD animated film ''[[ComicBook/DCTheNewFrontier Justice League: The New Frontier]]''.
** This film will not be the only time Ed O'Ross would [[WesternAnimation/MenInBlackTheSeries fight an alien menace while on duty]].
** Creator/DannyTrejo in one of his early roles during TheEighties plays an inmate who falls victim to the alien BigBad after calling it out, Trejo would later appear in the 2010 film ''Film/{{Predators}}'', where he plays another criminal [[spoiler:who is killed by an alien antagonist]] in a film that is the second sequel to another alien invasion action-horror movie ''Film/{{Predator}}'', which was released in 1987, that same year this film came out.
** [[Series/TwinPeaks A weird FBI agent from Seattle, played by Kyle MacLachlan, joins forces with a hard nosed, curly haired local cop to stop a serial killer that jumps from body to body.]]
** An alien criminal robs banks, guns down innocent civilians, steals expensive cars and takes them on high-speed joyrides, and he does it all ForTheLulz. Take the ''alien'' part out of the equation, [[VideoGame/GrandTheftAuto what does this sound like to you?]]
** Creator/KyleMacLachlan plays a host to an alien controlling his actions and would later transfer himself into a father who has a wife and a little girl, then decades later [=MacLachlan=] plays a father with a wife and a little girl which the latter has her actions controlled by a collective of characters in the Disney/Pixar film ''WesternAnimation/InsideOut''.
* RetroactiveRecognition: An early in his career Creator/DannyTrejo, as a nameless inmate who gets plugged when he calls The Parasite a hippie during its shooting rampage.
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