* AdaptationDisplacement: The number of people who've seen the movies dwarf the number who've read the book quite handily.
* AlternateCharacterInterpretation: Try watching ''Film/{{Pleasantville}}'' immediately before or after the 1956 version; it's a weird antithesis.
** Also, there's some room for uncertainty regarding whether the aliens are truly replacing the originals, and taking their memories is merely useful for blending in, or if they actually see themselves as merging with the original individual in a symbiotic relationship. This can make the aliens either a case of AlwaysChaoticEvil, or simply BlueAndOrangeMorality.
* CrowningMusicOfAwesome: The 1978 film's soundtrack, helping enhance the horror through jazz music.
* FunnyAneurysmMoment: There's a moment early on in the 1978 film at a playground where a priest (likely having become a pod person) is on a swing while staring at small children who are playing. Suprised 4Chan hasn't [[MemeticMolester hasn't picked that up yet]].
** The priest, incidentally, is played by Robert Duvall in a cameo.
* MemeticMutation: That "pointing" bit from the end of the 1978 film has become an ImageMacro. No text needed.
* NightmareRetardant: The 2007 version, which is LighterAndSofter than the previous versions and is {{Anvilicious}} in its attempts to incorporate TheWarOnTerror.
* ParanoiaFuel: Have your friends and loved ones been acting strangely lately? ''How strangely?'' By the way, if you fall asleep you might be replaced by an alien doppelganger. FYI.
* RetroactiveRecognition: That suspicious meter-reader in the original film? He's played by Sam Peckinpah, who later directed such films as ''TheWildBunch'' and ''StrawDogs''.
* SpecialEffectFailure: The man-mask on the dog in the 1978 version. In the long shots, it's a pretty obvious mask.
* UncannyValley
** In universe as well, at least in the original. The duplicates look like, sound like, act like and have all the memories of the original, but their close relatives know ''something'' is wrong.
* WhatDoYouMeanItsNotPolitical: The original. The star and the director repeatedly insisted that they were all just making a sci-fi movie, not a social commentary.
** Averted by the 1978 and 2007 versions, which were pretty heavily political, but surprisingly not the case with the '90s adaptation.

----