''Once Upon A Time...'' is a series of educational cartoons released by Procidis.

There are eight installments for this series:
* ''Once Upon a Time… Man'' (1978), a series concerning the history of humans, starting in pre-history and progressing to World War II. In the final episode, it branches slighty as part of future predictions concerning pollution and warfare, by presenting an optimistic path.
* ''Once Upon a Time… Space'' (1982), a science-fiction cartoon
* ''Once Upon a Time… Life'' (1987), conerning the human body and how it works
* ''Once Upon a Time… The Americas'' (1991)
* ''Once Upon a Time… The Discoverers'' (1994)
* ''Once Upon a Time… The Explorers'' (1996)
* ''Once Upon a Time… Planet Earth'' (2008)
* ''Once Upon a Time... Music'' (2007; Released only in Spain)

!!This series contains the following tropes:

[[folder:Once Upon A Time... Man]]

* AscendedToCarnivorism: ''Edmontosaurus'' was shown eating ''Triceratops'' eggs.
* BubblyClouds: A pilot in World War I dived out of the plane, landed on a cloud to catch breath, before using the parachute to reach the ground.
* BunglingInventor: While Maestro does show inventions, there are plenty of episodes where they break down. In some cases, the mechanical devices explode.
* ByTheHair: A variation, where the pre-humans pulled their desired women by the hair. The women offered no resistance, as if they wanted to be dragged along.
* {{Conscription}}: There's at least two means of conscription shown. The eleventh episode shows a man dragging two to the volunteer booth for the crusades. Later episodes use thugs to force signatures, and an even later one has them sign while drunk.
* CranialEruption: Damaging head injuries result in one.
* DownInTheDumps: The final episode shows attempts to clean up a junkyard that's become aggressive.
* GoryDiscretionShot: The guillotine is only shown chopping the head off a cigar, to symbolize an execution.
* EtTuBrute: The English version plays the trope straight. However, the original French version has Caesar saying "Toi aussi, mon fils" (You too my son).
* FatGirl: The episode concerning trains had a minor obese character having trouble squeezing in through the train's doorway.
* FromBeyondTheFourthwall: The clock at the corner of the screen sometimes reminds characters of an error they're making. For example, Maestro using modern numbers in 350 BC, or a viking woman upset that her lover isn't monogamous.
* HammerspaceHair: Maestro tends to hold large objects in his hair, and in one episode, merges two small boards into a longer board.
* ISurrenderSuckers: The Vikings had difficulty assaulting a fortress. Because of the failure, they approached the castle to parley, saying that their chief was killed in battle- and as such, they wish to convert to Christianity; the chief is to be buried with his weapons as per their tradition. Once inside, the chief jumped out of the coffin, passed the weapons the allies, and started the rampage.
* JudgmentOfSolomon: Depicted as originally described. Then, a later episode spoofs the judgement with two men fighting over ownership of a pig, with a suggestion to cut the pig in half.
* NationalGeographicNudity: Early episodes had the humans with a breast drawn and uncovered - usually when the woman was carrying her baby. However, there were one or two DiscretionShots or SceneryCensor mixed in.
* NonFatalExplosions: During the Storming of the Bastille, a child cheering on the attackers.
* NoSell: Jumbo shrugs off any attack. Even weapons used against him break, whether they're clubs, swords, or whips.
* PillowPistol: Shown in the French revolution episode. As an artistic licence in gun safety, Maestro kicked the bed when he saw bed bugs approaching.
* PublicDomainSoundtrack: Toccata and Fugue in D minor, BWV 565 was used as the introduction theme. You may sometimes hear other classical {{StandardSnippet}}s as well.
* RaptorAttack: ''Archaeopteryx'' incorrectly has four fingers on its wings, with the feathers attached at its wrist.
* RegularCharacter: The same characters are shown in each episode - with each episode being a different section of history.
* RightOnQueue: Episode 14, where assassins burst into a house, having the door slammed after the third one. The first three are hung from the window above. The door then opens, asking for the next in line to enter.
* RoadSignReversal: In the episode with the 1910-era automobile racing, one group was ahead of the pack, and decided to mess everyone behind by adjusting a road sign to Bordeaux. However, the previous scene showed the sign being spun by a breeze, and the cheaters actually corrected the sign before going down the wrong road.
* ScienceMarchesOn: The first episode's segment on prehistory features almost every outdated stock trope present in pre-Dinosaur Renaissance works, such as swamp-dwelling sauropods, tail-dragging herbivorous dinosaurs, upright-stanced and water-fearing theropods (no tail-dragging, though), bendy-neck plesiosaurs, and ''Archaeopteryx'' evolving out of "thecodonts" through the hypothetical "''Proavis''" phase -- confusingly, the narration mentions that birds (and crocodiles!) also evolved from dinosaurs.
%%* SequelHook
* {{Slapstick}}: A lot of humor is based off of AmusingInjuries.
* StockDinosaurs: ''Archaeopteryx'', ''Stegosaurus'', ''Allosaurus'', ''Apatosaurus'' (called Brontosaurus), ''Diplodocus'', ''Brachiosaurus'', ''Pteranodon'', ''Elasmosaurus'', ''Tylosaurus'', ''Edmontosaurus'' (called Anatosaurus and is incorrectly depicted with a crest), ''Triceratops'', and ''TyrannosaurusRex'' all appear in the first episode.
* TotemPoleTrench: The second episode had two children use a grass skirt to look taller.
* WalkThisWay: The episode for Louis XIV had one drill sergeant try to train new recruits. The instructor tripped over a rock, tossing the rifle into the air, and hitting the other instructor. The three recruits did the exact same thing, landing their thrown rifles on the same instructor.

[[folder:Once Upon A Time... Space]]

* AlwaysChaoticEvil: General Pest, GloriousLeader of Cassiopeia -said to be chosen because masses follow him-. From using slaves to build a massive base in a planet near of a star close to going supernova, and when it happens prefering to save first the hardware and later the people to allying with the Humanoids hoping to betray them later.
* ArtificialIntelligence. The Great Computer.
* ArtisticLicenseAstronomy. Despite this cartoon having an educational side teaching basic astronomical concepts, there're some examples of this trope:
** AsteroidThicket: Several examples, starting with Sol's one as appears quite prominently on the show's opening credits. Avoided, however, with the rings of Saturn.
** OldSchoolDogfight: Space battles follow this trope quite well, with ships being really close to each other when fighting (within what seems as visual range) and moving -the most maneuverable ones, at least- like planes.
** SpaceIsAir: See OldSchoolDogfight above.
** SpaceIsNoisy: From the sounds made by the engines of ships to the one caused by their weapons. Not that it's exclussive just to this show, though.
** The different alien races are said to come from different constellations -examples include Auriga, Cassiopeia, Centaurus, and many others, with Cassiopeia even using the W formed by the brightest stars as seen from Earth as their symbol, when from their homestars those constellations would be unrecognizable as the stars that form them are usually at very different distances one of each other. This goes even further in the first chapter, where the different races are presented, as we see and are said how Cassiopeia controls several and even a crude starmap showing those asterisms can be seen as background.
* CoolStarship: ''Lots'' of them, from the Cassiopeian Murene and Nautilus to the Omega Confederation heavy cruisers or the Ursus freighter.
* CurbStompBattle: [[spoiler: the near-complete destruction of the Cassiopeian Navy by the Humanoids. The ending of the series, with the Humanoids being destroyed by the beings of light met by Psi counts too.]]
* EarthShatteringKaboom: The Humanoids try their planet-destroying ship, actually formed of six smaller vessels that join together, with what looks like a Moon-like planet [[spoiler: after defeating the Cassiopeians, the Great Computer menaces to do that with their homeworld if they do not surrender]]. There're two others involving stars, one of them natural when an unstable star becomes a supernova and [[spoiler: the other of them induced by energy beings to destroy the Humanoid fleet]].
* EnergyBeings: Psi, the female protagonist who has psionic habilities, knows some of them [[spoiler: who destroy the Great Computer and their fleet in the last episodes.]]
* InsignificantLittleBluePlanet: While the leaders of the Omega Confederation are humans, Earth itself is just a minor member of it.
* PlanetOfHats: in several episodes the protagonists travel to planets that turn around this trope such as a planet habited by the Greek Gods, other by incas, and other by prehistoric humans -oddly enough, this one is in the Andromeda Galaxy-.
* Recycled InSPACE: Cassiopeia, clearly based too on the Romulans from StarTrek down to their looks, is the Roman Republic with space technology, [[CrystalSpiresandTogas Crystal Spires and Togas]], and aliens instead of humans. They have a bit on inspiration on the Nazis, too, their military carrying arm bandages that evocate Nazi ones.
* RobotWar: [[spoiler: the conflict first between the Humanoid and Cassiopeian forces and when the latter are defeated the one between the Humanoids and Omega]].
* ShowTheirWork: In one of the episodes the protagonists visit the largest planets of the Solar System. While the moons of Jupiter are described in some detail showing the knowledge of them that existed at the epoch the cartoon was made (what the Voyager probes found there in 1979 and 1980), the moons of the others are described much more vaguely and even appear as featureless orbs since at that time knowledge about that topic was very limited. This can be noted, too, in the opening credits.
* TheFederation: The Omega Confederation.
* ThemeAndVariationsSoundtrack: The soundtrack of this series has some themes that follow this trope, being variants in different musical styles of a single theme (from synthethizer or jazz to chamber or orchestal music).
* WellIntentionedExtremist: The Great Computer and the scientist who created it, who offered it to their fellows as a way to have the humans living in peace. It turns out the concept the Great Computer has of giving peace to the men is having them tightly controlled and living without technology as in the Middle Ages.
* WhatASenselessWasteOfHumanLife: [[spoiler: During the battle between the Cassiopeia and Humanoid fleets, and when their finest warships, the Nautilus-class, are being slaughtered by dozens, one of the officers onboard the flagship ask the admiral to think about how useless is the battle. In the same battle, the Humanoids tell ''two'' times their opponents to surrender, the third and last one coming with the warning of destroying their homeworld if they don't comply]]
* WorldTree: A big, sentient, tree found in one lush planet of the Pegasus sector without intelligent life. It turns it dislikes those people who mess with nature.