History Main / EveryoneIsATomato

* OlderThanRadio: ''Literature/TheManWhoWasThursday'' (1908) by G.K. Chesterton: The hero, who is an undercover policeman is drawn into the murky world of anarchists. He discovers that one of their number is also an undercover policeman. As the story continues, his attempts to apprehend anarchists force all of them to reveal that they are policemen, too.

'''''Note:''''' This is a SpoileredRotten trope, that means that '''EVERY SINGLE EXAMPLE''' on this list is a spoiler by default and most of them will be unmarked. [[YouHaveBeenWarned This is your last warning]], only proceed if you really believe you can handle this list.

'''Obviously, beware of spoilers!'''

* For a day, everyone became Marco in the Animorphs discord.

* ''Manga/MahouSenseiNegima'' is a bit guilty of this. Although most of the cast was considered normal at the start of the series (excluding Sayo the ghost and Chachamaru the robot,) since then it has been revealed that [[spoiler: Yuuna, Misora, Konoka, Hakase, Takamichi, Chao, and the Headmaster]] were all involved in magic from the beginning, and [[spoiler: Evangeline, Mana, Zazie, and Setsuna]] are demonic. Asuna is practically her own category.

* About two thirds into ''Film/{{Identity}}'', it's revealed that [[spoiler: every single character at the motel is a personality of Malcolm Rivers, and the whole movie was a plot to kill off his alternate identities, curing his Multiple Personality Disorder.]]

* The second ''Series/{{Battlestar Galactica|2003}}'' made nearly half the cast Cylons. Although there was plenty of evidence to suggest that [[spoiler: Tyrol]] was one, and even that [[spoiler:Tigh OR Ellen was one -- which necessitates the other]]. Not to mention precedent of sleeper agents. This was not planned out in advance however, but rather a hasty improvisation by the writers.

* ''Series/{{V 2009}}'': Seems like every third character is secretly a V sleeper. [[spoiler: ''Two'' of Erica's FBI partners were Visitors--not to mention her obstetrician.]]

* From ''VideoGame/KingdomHeartsII'' onwards, almost every single mysterious character manages to be [[spoiler: a form of Sora]], no matter how illogical or unlikely it seems. The only ones who aren't are the ones who actually turn out to be [[spoiler: a form of Xehanort.]]
* Subtle one in ''VideoGame/SilentHill2'', all male models in game who aren't Eddie are [[spoiler: James]]. Pyramid Head, the corpses all over the place, the prisoners, the Lying Figures, all of them. Similarly, most female models are [[spoiler: Mary]].
* Right near the end of ''VideoGame/AssassinsCreed2'', you find out that every helpful adult not your mother or named Leonardo [=DiVinci=] is [[spoiler: an assassin that's been helping you become one of them.]]

* By the late 1950s, the Communist Party USA was in heavy decline thanks to McCarthyism. However, the FBI maintained a paranoid obsession with it, and dedicated huge resources to tracking it, to the extent that undercover FBI informants made up as much as 30% of the party, and were crucial to its continued finances. J. Edgar Hoover later admitted that ironically, the FBI's undercover membership bolstering and financing of the CPUSA probably enabled it to avoid collapse.

* Subtle one in ''SilentHill2'', all male models in game who aren't Eddie are [[spoiler: James]]. Pyramid Head, the corpses all over the place, the prisoners, the Lying Figures, all of them. Similarly, most female models are [[spoiler: Mary]].

* The second ''Series/{{Battlestar Galactica|2003}}'' made nearly half the cast Cylons. Although there was plenty of evidence to suggest that [[spoiler: Tyrol]] was one, and even that [[spoiler:Tigh OR Ellen was one � which necessitates the other]]. Not to mention precedent of sleeper agents. This was not planned out in advance however, but rather a hasty improvisation by the writers.

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* The second ''Series/{{Battlestar Galactica|2003}}'' made nearly half the cast Cylons. Although there was plenty of evidence to suggest that [[spoiler: Tyrol]] was one, and even that [[spoiler:Tigh OR Ellen was one — which necessitates the other]]. Not to mention precedent of sleeper agents. This was not planned out in advance however, but rather a hasty improvisation by the writers.

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* The second ''Series/{{Battlestar Galactica|2003}}'' made nearly half the cast Cylons. Although there was plenty of evidence to suggest that [[spoiler: Tyrol]] was one, and even that [[spoiler:Tigh OR Ellen was one — which necessitates the other]]. Not to mention precedent of sleeper agents.

* Creator/JohnCarpenter's ''The Ward'' uses a similar premise to ''Identity''.

* Lampshaded in the ''ComicBook/GreatLakesAvengers'', where the team renamed themselves The Great Lakes ComicBook/{{X-Men}} after it was revealed that the entire team was made up of mutants.

* ''MahouSenseiNegima'' is a bit guilty of this. Although most of the cast was considered normal at the start of the series (excluding Sayo the ghost and Chachamaru the robot,) since then it has been revealed that [[spoiler: Yuuna, Misora, Konoka, Hakase, Takamichi, Chao, and the Headmaster]] were all involved in magic from the beginning, and [[spoiler: Evangeline, Mana, Zazie, and Setsuna]] are demonic. Asuna is practically her own category.

** It's a justified trope in the Marvelverse, mind; all the other origins are one-in-a-billion freak occurences, or inventions by 99.999999th-percentile geniuses [[ReedRichardsIsUseless who for some reason keep their potentially world-changing inventions to themselves]]. Mutants are a ''demographic.''
* By the finale of ''StrangersInParadise'', nearly every female character in the series except Francine turns out to be [[spoiler:a current or former Parker Girl]].

See also: FlockOfWolves. Contrast TheyLookLikeUsNow.

* The second ''Series/{{Battlestar Galactica|Reimagined}}'' made nearly half the cast Cylons. Although there was plenty of evidence to suggest that [[spoiler: Tyrol]] was one, and even that [[spoiler:Tigh OR Ellen was one — which necessitates the other]]. Not to mention precedent of sleeper agents.

'''Ron Moore:''' Help? Why would I need help writing plots? I just throw a dart at the cast list, and...boom! [[Series/BattlestarGalacticaReimagined They're a Cylon!]] Rinse, repeat, cash the f*cking check. Watch! Sh'boom! Sh'bong! Sh'bing! Cylon. Please help me! This is so hard!

* Lampshaded in the ''GreatLakesAvengers'', where the team renamed themselves The Great Lakes ComicBook/{{X-Men}} after it was revealed that the entire team was made up of mutants.

* In ''StrangersInParadise'', just about every [[spoiler: female]] character [[spoiler: turns out to be a current or former Parker Girl]].