History Main / SaveBothWorlds

* In ''Literature/DocSidhe'', the BigBad's plan involves merging the Grim World and the Fair World, effectively destroying both worlds, and it is up to Doc and his crew and displaced Grim Worlders Harris and Gabbie to stop him: especially as Gabbie is central to the BigBad's plan.

The other world's still in danger, but now so is ''yours'', and the {{Muggles}} certainly can't do anything about it. What do you do? You grab your adventuring party and a couple of friends from your homeworld, and you go out to SaveBothWorlds.

* The cornerstone of ''{{Series/Fringe}}'' and its mythology is an AlternateUniverse, and the protagonists of the show (from the prime universe) are using MadScience in an attempt to SaveBothWorlds after the first attempt at crossing from one universe to another resulted in a parade of soft spots, cracks in the walls of reality, breakdowns of the laws of physics, [[SwirlyEnergyThingy swirly energy thingies]], [[NegativeSpaceWedgie negative earth wedgies]], [[Film/{{Ghostbusters 1984}} dogs and cats living together]], etc. that threaten to destroy both universes. This is juxtaposed by the characters from the AlternateUniverse, who believe the only way to save their universe is to destroy the prime one first (and they may be right). [[spoiler: Or not, as it is revealed that the two worlds are permanently intertwined; therefore, the only way for any character to save their world is to SaveBothWorlds.]]

* ''Franchise/SonicTheHedgehog'' has this happen twice. Once in ''Sonic Rush'' Blaze is trapped on Sonic's world with the Sol Emeralds. If the Sol Emeralds aren't returned, both worlds will be destroyed. Again in ''Sonic Rush Adventure'', except [[spoiler:Sonic and Tails discover they are trapped in Blaze's world. Eggman and Eggman NEGA team up at the end of the game to steal the Jeweled Scepter, which keeps the two worlds separated.]]

* Initially, the end goal of the heroes of ''ComicBook/InfinityWars'' was to undo Gamora's merging of half the universe, but things take a turn in the fifth issue of the main story, in which ComicBook/AdamWarlock informs the [[ComicBook/DoctorStrange Sorcerer]] [[ComicBook/CaptainAmerica Supreme]] about the heroes' intentions, and the Sorcerer Supreme protests in response, refusing to give up his life for the sake of bringing back Dr. Strange and Captain America as two distinct beings again. The goal from that point forward, then, is to restore the regular Marvel Universe while preserving the Infinity Warps universe within the Soul Stone.

* Almost subverted in the third issue of the ''ComicBook/JLAAvengers'' crossover miniseries, both groups of heroes are unsure they want to restore their universes when they witness the {{Face Heel Turn}}s, {{Heroic Sacrifice}}s, {{Suspiciously Similar Substitute}}s, and WithGreatPowerComesGreatInsanity that they will experience in the "correct" universe. Out of everyone Hal Jordan, who has the furthest to fall. Argues they don't have the right to play God with the two universes, causing the heroes agree to restore reality.

* ''SonicX'': Towards the end of the second series, the two worlds are revealed to be merging into each other again, with the catastrophic effect of canceling out each others timelines and causing time to come to a stand still. [[spoiler: The only solution is to send the Sonic characters home.]]

* TheFamousJettJackson: Referenced in TheMovie:

* ''AnotherCenturysEpisode 3'' features a "save both worlds" plot, as some AppliedPhlebotinum that exists in both worlds creates a dimensional rift, pulling the two Earths together due to gravitational forces. Also connects to ''Eureka 7'' pretty significantly, since it's an IntercontinuityCrossover.

%%* ''KeysToTheKingdom'', particularly since if the House falls, so does the rest of the Universe.

* Most of ''[[YoungWizards So You Want To Be A Wizard]]'' by Creator/DianeDuane is spent in an alternate universe where the [[BigBad Lone Power]] has already put out the sun. At the climax, the protagonists make it back into their own universe, but the Lone Power follows them through the worldgate and they have to stop it...

* One episode of ''Series/TheSuperMarioBrosSuperShow'' brings Mario and Luigi back to Brooklyn, but also Bowser and company as well. They have to save Brooklyn and the Mushroom Kingdom from Bowser.
* An episode of the ''[[WesternAnimation/DungeonsAndDragons Dungeons & Dragons]]'' cartoon had the kids finally get back to their own world, but Venger followed.

* ''VideoGame/TheLegendOfZeldaALinkBetweenWorlds'': Link starts out trying to save Hyrule, but soon finds that its counterpart, Lorule, is in even worse shape. [[spoiler:In the end, it looks as though Hyrule will be saved at the expense of Lorule, which would make this a subversion... but Link and Zelda then wish on the Triforce for Lorule's Triforce to be restored, saving Lorule, and making this DoubleSubverted]].

* ''Outcast'': Opening the portal between the two worlds creates a black hole which will swallow up the Earth... unless you enter the alternate universe to figure out how to stop it. It turns out the alternate universe needs to be saved as well.

* ''[[{{Narnia}} The Magician's Nephew]]'', when Diggory lets Jadis loose in London and then in Narnia.

* The AffablyEvil villain in ''Literature/Everlost'' is trying to kill everyone and destroy everything in the real world so it will all be "preserved" in Everlost.

* In the ''{{Everworld}}'' books, it would be a bad thing if the gods crossed over into the world of our own, or if aggressive human men with guns crossed over into the world of Everworld. Both of these dangers threaten to happen over the course of the stories.

%%* Extremely weird example in ChinaMieville's novel ''Literature/TheCityAndTheCity''. Too good to be spoiled.

%%* AaronAllston's ''DocSidhe'' and ''Sidhe-Devil'' both fight foes that could disturb both "the grim world" (ours) and "the fair world" (Faerie).

[[folder:Fan Fic]]

* The cornerstone of ''{{Series/Fringe}}'' and its mythology is an AlternateUniverse, and the protagonists of the show (from the prime universe) are using MadScience in an attempt to SaveBothWorlds after the first attempt at crossing from one universe to another resulted in a parade of soft spots, cracks in the walls of reality, breakdowns of the laws of physics, [[SwirlyEnergyThingy swirly energy thingies]], [[NegativeSpaceWedgie negative earth wedgies]], [[Film/{{Ghostbusters}} dogs and cats living together]], etc. that threaten to destroy both universes. This is juxtaposed by the characters from the AlternateUniverse, who believe the only way to save their universe is to destroy the prime one first (and they may be right). [[spoiler: Or not, as it is revealed that the two worlds are permanently intertwined; therefore, the only way for any character to save their world is to SaveBothWorlds.]]

* The heroes of ''TheDragonWarsSaga'' must save the magical world they're stuck in to save Earth.

%%* ''{{Paprika}}'' has the protagonists trying to save both the real world and the DreamLand.

* Technically, the titular heroine from ''May Bird'' series has to save "only" the ''Ever After'' world, but since all humans (including herself) will inevitably go there after death, this affect everybody on Earth as well. Not to mention that [[spoiler: the BigBad is actively interfering with Earth, too, and it's only a question of time when he wrecks the Earth directly.]]

** Also ''Franchise/TheDarkTower'', although in this there are many worlds and Roland and his companions must save all of them (since they will all be destroyed if the Dark Tower falls). However, Roland's world and Earth are the main ones that the heroes focus on.

* ''SonicTheHedgehog'' has this happen twice. Once in ''Sonic Rush'' Blaze is trapped on Sonic's world with the Sol Emeralds. If the Sol Emeralds aren't returned, both worlds will be destroyed. Again in ''Sonic Rush Adventure'', except [[spoiler:Sonic and Tails discover they are trapped in Blaze's world. Eggman and Eggman NEGA team up at the end of the game to steal the Jeweled Scepter, which keeps the two worlds separated.]]

* One episode of ''SuperMarioBrosSuperShow'' brings Mario and Luigi back to Brooklyn, but also Bowser and company as well. They have to save Brooklyn and the Mushroom Kingdom from Bowser.

[[VideoGame/TheLegendOfZeldaALinkBetweenWorlds http://static.tvtropes.org/pmwiki/pub/images/albw_artwork_7767.jpg]]

* It turns out that ThoseWhoHuntElves need to get back to their home dimension to prevent it from fatally merging with the one they've found themselves stuck in. So their quest to get sent back becomes all the more important.

* PrettyCure has this in every series.