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The Multiverse

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DC Comics presents: the Speedster Multiverse.

Future Trunks: You see, when I travel back to the past, I'm... technically going to a different universe...
Gohan: Oh, you mean Multiverse Theory?
Future Trunks: Wait, what?!
Gohan: Yeah! With every decision, it creates a branch in the timeline! Whenever you travel back in time, you're actually entering another parallel universe!
Future Trunks: How could you possibly...?
Gohan: I've been studying theoretical physics. Although at this point, I guess it's just physics.

Some settings refer to not just one other dimension, one other universe, or one other timeline, but to a whole set of other dimensions, universes, planes of existence, realities, timelines, and the like. A collection of distinct universes exists, said universes often being interconnected in a way that allows characters to travel to and from them. It might be as a tourist who just goes to look and tries not to change anything, or as a participant who goes in and interacts with the people in the other universe.

The multiverse can encompass an infinite number of possible and impossible "moments", some of these linked by tidy and coherent timelines. But there may also be an equal or even greater number of incoherent, looped, knotted, or unconnected timeless moments that remain unchanging for all eternity.


Timelines need not progress forward, or even backward, but also what appears to be sideways through disjointed and unrelated frames of reference. The multiverse may have no apparent ultimate purpose or reason for existence, other than it just is.

Selecting a specific dimensional or timeline destination in the multiverse may be difficult for a traveler. To make sense of this, they may have some relative sense of locality starting from their "home" dimension or timeline, traveling "outward" into the gradually diverging alternate realities around their own. The dimensional expanse is potentially limitless, while the traveler's lifetime and ability to explore and survive them is not.

The method of multiverse travel can be physical or nonphysical. A nonphysical multiverse traveler may be disembodied as a spectator, but may also be able to enter the body of beings to experience what they are experiencing, or to assume direct control. A physical multiverse traveler has additional problems of survival to deal with, such as breathable air, correct temperature, pressure, and gravity, plus also unknowns such as foreign microorganisms. And at the same time a physical dimensional traveler can unintentionally affect the worlds they visit, with their own viruses or bacteria, and not just by what they say or do.


The multiverse permits changing of timelines in a personal sense. Going back in time to change something simply causes the travelers to experience an altered timeline going forward from that change. The original timeline also still exists and progresses normally, at the moment they left.

Damage to timelines in the multiverse by a time traveler can be impossible, since all forms of damage and all timelines where it occurs may already exist but are simply not experienced, because the differing timelines can converge and reuse the same spatial moments of existence without themselves intersecting.

The multiverse can also solve the problem of free will vs predestination. It is possible that the multiverse is static and unchanging. All things that can ever exist already exist somewhere within it. But because there are a possibly infinite number of timelines converging and diverging from every moment into an equally huge number of alternate realities, predestination becomes irrelevant since normally only one of these timelines is experientially traversable.

The definition of the self and the individual becomes vague, because there can be an equally infinite number of "selves of me" all traversing the timelines simultaneously. Only a privileged few of these may gain the ability to break free of the restrictions and cross between timelines or experience other timelines completely unrelated to their own.

The need to achieve anything and the ability to create anything new becomes irrelevant if the ability to easily traverse the infinitely varied timelines of the multiverse becomes possible. One can simply choose to experience a point in a timeline where the achievements have already occurred, or the desired thing was already created and carried out to its fullest form.

Morality becomes a question of what timelines and time periods that a multiverse voyager allows themselves to experience and be aware of, because the worst atrocities imaginable already exist in every possible form and can not be prevented. One can only choose to experience the kinder, gentler timelines, while recognizing the others exist and actively choosing to not experience them.

At the same time, a multiverse voyager can choose to experience atrocious timelines in the multiverse, knowing that they are only responsible for choosing to be aware of them, and not for actually causing any of the events of the timeline, because the events that will occur in those timelines are already fixed and can not be changed. Any attempt at change of the events of a timeline simply results in selection of one of the many diverging paths away from it, which also already exist in every possible form.

Dreaming may involve experiencing incoherent snippets of alternate timelines in the multiverse, as a form of "taking a break" from main normal timeline while sleeping. Lucid dreamers, meditators, and astral travelers may also gain more direct control over these alternate timeline experiences, to experience them more vividly or coherently.

Dimensional Travelers can move between universes and explore the Multiverse. While it is possible they don't have a choice in their destination, sometimes they do. There are a wide variety of Interdimensional Travel Devices available but the most common are gates or magic.

In fantasy settings, the other worlds are often referred to as "planes of existence", and are alternate dimensions. In most science fiction settings, the other worlds are often entire parallel universes or Alternate Timelines.

On some occasions it's the way for a creator to tie several different works via Canon Welding, or to justify a Crossover.

This provides all sorts of interesting ideas for things you can do, for good or bad. If it involves trans-universe Sex Tourism, you have Your Universe or Mine? (or Screw Yourself sometimes). However, beware Evil Twin, and similar beings.

Sometimes, the Multiverse is protected by a Guardian of the Multiverse. The Multiversal Conqueror, on the other hand, wants to conquer or destroy it.

It is not the same thing as Alternate Continuity — which refers to a separate universe which a work has (but that might equally have its own Multiverse within its Continuity), but it makes for a handy way to link them if the writers are so inclined.

See also Bizarro Universe, Another Dimension and Alternate Universe. Compare Rubber-Band History. If one universe acts as a Cosmic Keystone that the others are based on, that's The Earth-Prime Theory.

For works set in the same series franchise, see The 'Verse and Intra-Franchise Crossover.


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    Anime & Manga 
  • Bokurano: The main characters are fighting aliens who are attempting to destroy the Earth. Eventually it is revealed that the aliens are actually humans from alternate Earths. The Earths tend to be fairly similar and can easily be mistaken for one another (which the main characters did), though alternates of individuals from one world to another are very rare.
  • This concept is briefly utilized in Cross Ange to explain the motivations of its villain, Embryo. And to show how the DRAGONS are able to co-exist in the same timeline as the show's current Earth.
    • Said villain's motivations lead into Omnicidal Maniac territories by the finale, as it suggests that he ventured outside his own universe and blew up other planets to conduct his experiments.
  • While on the surface Digimon appears to be a case of regular continuity reboots, the WonderSwan video games establish it instead as a multiverse. Almost every anime series, manga and video game of the franchise has its own entirely separate versions of the real and Digital World (except Digimon Adventure 02 and Digimon Xros Wars: The Young Hunters Who Leapt Through Time, which are sequels and so exist in the same world); the WonderSwan games follow Ryo Akiyama's travels between a few of them. Digimon V-Tamer 01 had three special chapters in which Taichi Yagami and Zeromaru interact with other Digimon universes, namely those of Digimon Adventure (which has its own version of Taichi Yagami), Digimon Frontier and the WonderSwan games. As such, almost all incarnations of Digimon take place in a different human world/Digital World pair in the multiverse, and if you know what you're doing (or have a dimension-jumping nemesis, in the case of Ryo Akiyama) you can travel between them. In addition, some canons have other dimensions tied to that particular universe; Digimon Adventure had the Dark Ocean and a surreal world wherein one's wishes defined reality, with others accessible through card combinations at a gate in Vamdemon's castle, and Digimon Xros Wars: The Young Hunters Who Leapt Through Time features DigiQuartz, a bizarre Dark World in between the Real and Digital Worlds.
    • It's also important to note that certain Digital entities can actually violate the multiverse's rules. For example, as revealed by Mirei Mikagura, the Seven Great Demon Lords exist in all possible realities at the same time, meaning each universe has their own set of Demon Lords. This is done as a way to ensure their continued existence. If they are absent in any one reality, then they have already been defeated in that particular universe. Which is actually bad for the other realities, who have to cope with the fact that their own set of Demon Lords just became stronger.
  • Dragon Ball:
    • Dragon Ball Z: Battle of Gods introduces the concept of the Multiverse with the God of Destruction Beerus stating that there are twelve universes in total and the main cast comes from the seventh one. Dragon Ball Super elaborates by saying that every pair of universes whose numbers adds up to 13 is a matched set; Universe 7's partner is Universe 6, with Beerus' brother Champa serving as its God of Destruction and eventually challenging Beerus and the Z-Fighters to an inter-universal tournament.
      • Above all twelve universes is Zen'o-sama, the King of Everything. According to Whis, there used to be eighteen universes until Zen'o destroyed six of them when he was in a bad mood. Then in the Universe Survival Saga, he decides that watching twelve universes is too much work (even with two of himself) and announces that he'll be paring it down to five. The universes are ranked by their level of development, and the bottom eight have to participate in a Battle Royale to see who will get to continue existing alongside the top four. And then it's subverted in the final episode and revealed to be a gigantic Secret Test of Character. Android 17 wishes the destroyed universes back with the Super Dragon Balls, which is what Zen'o wanted and fully expected to happen from the very beginning (since he believed that whomever won the tournament would have to be a virtuous person). His assistant, the Grand Priest, reveals that if the winner had made a selfish wish, Zen'o would have erased everything.
    • Dragon Ball Z indulged in this even earlier, where Future Trunks and Cell's attempts to time-travel turned out to be unintentional dimension-hopping. This series of events accounts for about three parallel worlds: The main DBZ universe, Trunks' timeline, Cell's timeline, plus a fourth speculated upon by official guidebooksnote . In Super, Trunks' timeline — every last bit of it — is erased by Future Zen'o-sama to prevent Zamasu (now an Eldritch Abomination) from bleeding into the present and destroying it. But it's not much of a loss, since off-screen Zamasu had apparently slain all the gods and every sentient being except for a tiny handful of Earthlings, and they all died within the first few moments of Zamasu becoming a cosmic horror.
    • According to Dragon Ball Xenoverse and its sequel, the events of Dragon Ball GT and the Non-Serial Movies exist in alternate timelines. The antagonists screwing with time thus allows them to appear in the games' storylines despite their non-canon status.
  • Genesis of Aquarion eventually goes this route: the OVA's are explicitly set in a different but co-existent timeline from the series, and the repercussions of what happens in the OVA-world has slight effects on the TV series-timeline. This also becomes a plot point in Aquarion Evol, as it turns out that the Abductors are from an alternate version of Vega (the planet the series takes place on), which split off somehow during the events of the Genesis finale. A crossover OVA between Genesis and Evol makes a passing mention to seven different worlds existing as a result of the ancient war in Genesis's backstory, and deals with the consequences of what happens when a couple of those worlds begin to bleed into each other.
  • The Girl In Twilight is about five girls who discover a way to travel between parallel universes. They soon find themselves drawn into a multiverse-spanning war against the eponymous “Twilight”, a cosmic force that is invading and destroying the universes.
  • In Hero Union BBS, the setting of the story spans multiple universes. Characters from different universes can be transported to another via summoning magic or communicate with each other via the forum. Only powerful heroes who have reached Level 8 or above can traverse the multiverse at will by mastering space-time magic.
  • The setting of Lyrical Nanoha is advanced enough to have fairly casual inter-dimensional travel, with the Time-Space Administration Bureau monitoring the security, safety, and cultural growth of every dimension.
  • The setting of the Mazinger Z franchise is this: Shin Mazinger Zero established that the original Mazinger Z timeline and all alternate timelines and realities seen in the story are part of a multiverse which includes the universes of Great Mazinger, UFO Robo Grendizer, Getter Robo, Kotetsu Jeeg, UC Gundam, Gunbuster and Neon Genesis Evangelion, among others.
  • From some point of the series onward, Hatou in Murasakiiro no Qualia can interact with all the parallel worlds. Each of these is one of the infinite possibilities for the flow of events that didn't get determined in her world.
  • Though not confirmed officially, the Neon Genesis Evangelion franchise is implied to use this trope between the various continuities and spin-offs. Kaworu appears to be aware of and/or remember every single one, including the anime, the mangas, the games, even the Rebuild films.
  • Noein has this where every universe is a For Want of a Nail situation, running off the theory that for every decision made, Another Dimension is created where the other option was chosen. Much philosophy ensues.
  • Reborn! (2004) has Byakuran become a Physical God of all parallel universes, using the three sets of rings and pacifiers in order to do so.
  • Slayers takes place in one (sometimes called “the red world”) of four universes, each of which has a good and evil god with five subordinates a piece, all projections floating atop a multiversal golden sea of chaos, A.K.A. The Lord of Nightmares. This doesn't really come into play for the most part, aside from in the anime-original TRY season, which concerns “overworlders” searching for five Plot Coupon weapons from their universe…
  • Space Dandy initially appears to be flagrantly ignoring its own continuity, with the main characters often dying at the end of an episode only to turn up in the next. It's revealed to be somewhat more complicated as things go on, particularly in the second season. The second season's opening episode 'I Can't Be The Only One, Baby,' sees Dandy and his friends meet multiple versions of themselves from various universe linked by a cosmic string. The universes reference various other anime and sf franchises. The final episode reveals that Dandy is the only being in the multiverse able to cross through the different dimensions, leading to God offering him the position of his replacement. He declines.
  • Tenchi Muyo! is the one huge metaseries with literally tens of alternative continuities, explored in various TV series, OVAs, novels, mangas, doujinshis etc. It also includes other series and titles by the same author and studio, and even the works by the other creators with sometimes completely different premises. It was explicitly stated by its creator, Masaki Kajishima, that all these titles and interpretations are true and represent different aspects of the same Multiverse, and he doesn't mind sharing. On the other hand, he restricts himself to the Tenchi Muyo! Ryo-Oh-Ki (that is, original OVAs) storyline and its spinoffs like Tenchi Muyo! GXP, and considers it the main and central storyline.
  • Tengen Toppa Gurren Lagann: Three Words: Multi-Dimensional Labyrinth. The Anti-Spiral effectively flings the consciousnesses of every member of Team Dai-Gurren to separate alternate realities without their true memories. According to the Anti-Spiral, these realities are "created instant-to-instant as they are perceived." It is also stated that the Anti-Spiral home world is hidden in-between the 10th and 11th dimensions. Finally, most of the final episode takes place in a "super-spiral universe where thought is given form."
  • Toriko reveals that after the Gourmet Big Bang, the Gourmet Gods’ energy would form 5 universes that came into existence, the Red Universe, the Blue Universe, the Green Universe, the Black Universe and the White Universe. Their favorite ingredients of the Gourmet Gods became known as Acacia’s Full Course Menu. Neo and the Blue Nitro come from the Blue Universe and Neo itself has eaten the entirety of that universe including stars and galaxies.
  • Yuuko from ×××HOLiC is called the Witch of Dimension for her ability to create gates to any Alternate Universe. It's her services which allow the cast of Tsubasa -RESERVoir CHRoNiCLE- to hop from one dimension to another trying to collect all the feathers.

    Comic Books 
  • Black Moon Chronicles: Apparently reality is made up of many different dimensions tied together by the four elements. After humanity leaves the Earth for a different world when it is about to be destroyed, it takes Lucifer one hell of an effort to find humanity again between all the different universes.
  • Major staple of The DCU and Marvel Universe comics (although DC attempted to get rid of it in the '80s; it's back now after the events of Infinite Crisis and 52).
    • DC comics popularized the multi-universe concept with the story "Flash of Two Worlds," where the Silver Age Flash and the Golden Age Flash crossed paths, learning that each was living in an alternative universe. After several cosmic upheavals, taking DC's number of universes from infinite to one to fifty-two, the DC Multiverse now consists of infinite universes grouped into sets of 'bubble' Multiverses suspended in a larger structure referred to as the Omniverse, these bubbles each having a different number of universes within. The 'local Multiverse' that the main DC Universe is set in is made up of 52 universes, some of which are recognizable from various Elseworlds stories, some of which are wholly new creations or amalgamations of worlds from before the original Crisis on Infinite Earths. Earth 2 of the New 52 deals with events that happen on one of these Earths, and Grant Morrison's The Multiversity series has six of its issues each dedicated to one Earth within the local Multiverse, plus a multiverse guidebook, with plans to explore these Earths and those beyond further in Multiversity Too. These 'local' universes are:
      • Earth-0, the main DCU.
      • Earth-1, the world home to the Earth One line of graphic novels, with young and inexperienced versions of the main DC heroes just beginning to appear, including Superman, Batman, Wonder Woman, Green Lantern, and the Teen Titans.
      • Earth-2, as featured in the comic of the same name, where younger versions of DC's Golden Age heroes arose in the modern day in the wake of an invasion from Apokolips that killed Superman, Batman and Wonder Woman.
      • Earth-3, the Mirror Universe of Earth-0, ruled by the Crime Syndicate of America until the Anti-Monitor destroyed it in Forever Evil (2013). It was replaced by a new version following Dark Nights: Death Metal.
      • Earth-4, where the Charlton Comics characters — The Question, Blue Beetle, Captain Atom, etc. — are the heroes of a Watchmen-influenced world.
      • Earth-5, the world of Captain Marvel and the Marvel Family.
      • Earth-6, the world now home to the stories from Just Imagine... Stan Lee Creating the DC Universe.
      • Earth-7, an Ultimate Marvel pastiche (later including elements of Marvel Zombies) that was destroyed by the Gentry in Multiversity. However, pastiches of DC characters can be seen among the dead, so it's likely this Earth was a mix-up in homage to the many DC and Marvel crossover stories; it also had an equivalent to Hellboy.
      • Earth-8, a Marvel Comics pastiche, for example featuring the Retaliators and the G-Men.
      • Earth-9, the Tangent Comics universe, with characters that have the same names as the main DCU heroes but are otherwise entirely different.
      • Earth-10, a world where Superman landed in Nazi Germany, and grew up to become Overman. With the help of reverse-engineered Kryptonian technology — and, when he was old enough, Overman himself — the Nazis won World War II. In guilt over the Nazis' atrocities, Overman turned his Earth into a pseudo-utopia; the last English-speaking rebels, Uncle Sam and the Freedom Fighters, fight Overman's New Reichsmen.
      • Earth-11, which includes female versions of the main DCU's heroes and villains, and male versions of its heroines and villainesses. This is a world where the Amazons of Themyscira had greater influence on society's advancement, to the point that women were given more freedom and helped shape Earth's future.
      • Earth-12, the DCAU world, currently in the era of Batman Beyond.
      • Earth-13, home to a dark, magical Justice League called the League of Shadows, including Superdemon, Hellblazer (based on the Batmanesque version from Doom Patrol #53 and Books of Magic Annual #3), and Fate (the '90s version with the ankh scar). The world is in a state of perpetual twilight, and there are 13 months in the year, and 13 hours in every day.
      • Earth-15, a perfect world that was destroyed by Superboy-Prime. All that's left is a Cosmic Grail that was hidden in another world.
      • Earth-16, with the children of the main DC universe's heroes and villains — Chris Kent as Superman's son, Damian Wayne as Batman's son, etc. — plus DC's '90s supers, who live as shallow celebrities with all evil having been wiped out by the previous generation.
      • Earth-17, an Earth ravaged by atomic destruction. Humanity lives in domed cities, and the Atomic Knights of Justice are led by Adam Strange.
      • Earth-18, a Western-style world featuring the Justice Riders, who ride on Steampunk horses. On this world, the Time Trapper froze the state of progression so that, even with many 21st Century based technological advances, society is still a frontier world.
      • Earth-19, a world currently in the era of Edwardian England, home to the Bat Man, the Wonder Woman, the Accelerated Man, and the Shrinking Man. Bruce and Diana are based on Gotham By Gaslight and Amazonia respectively note .
      • Earth-20, a pulp-style world featuring Doc Fate and the Society of Super-Heroes, who include Abin Sur's Green Lantern, Immortal Man, the Mighty Atom, and the Blackhawks.
      • Earth-21, the 1960s DC: The New Frontier universe, where John F. Kennedy was never assassinated and the Justice League of America protects a newly spacefaring USA.
      • Earth-22, the Kingdom Come universe where a new generation of heroes has run amok, forcing Superman and his allies to come out of retirement to try and fix things.
      • Earth-23, home of President Superman, where the world's greatest heroes are black (which can mean that they're black in the main DCU, as with Steel and Vixen; that a black holder of the legacy in the main DCU is Earth-23's primary holder, as seems to be the case with Green Lantern; that they're black versions of the hero, as with Superman; or that they're completely unique). The major exception is Batman.
      • Earth-26, an Alternate Tooniverse where Captain Carrot and His Amazing Zoo Crew! reside.
      • Earth-29, the cube-shaped Bizarro Universe.
      • Earth-30, the Superman: Red Son universe where Superman landed in Russia and became the leader of the USSR.
      • Earth-31, a world ravaged by tsunamis and earthquakes, where modern pirates roam the seas. Captain Leatherwing and his crew of the Flying Fox act as a force for good.
      • Earth-32, a world partially based on Batman: In Darkest Knight. Bruce Wayne is Green Lantern, and fights alongside heroes such as Super-Martian, Wonderhawk, and Aquaflash in the Justice Titans.
      • Earth-33, a.k.a. Earth-Prime, our own real world.
      • Earth-34, an Astro City pastiche, home to Goodfellow and the heroes of Cosmoville.
      • Earth-35, a pastiche of Rob Liefeld's Extreme Studios comics, including Supremo and Majesty, Queen of Venus. The premier superteam of this world is the Super-Americans.
      • Earth-36, a world home to a team called Justice 9, based off Big Bang Comics, whose main hero Optiman has been killed by Super-Doomsday of Earth-45.
      • Earth-37, a world based off the works of author Howard Chaykin, such as Batman: Thrillkiller and Twilight.
      • Earth-38, the Superman & Batman: Generations universe where Superman debuted in 1938 and Batman followed in 1939; they aged normally and had families, including the modern scion of both, Knight-Wing.
      • Earth-39, a world based off the works of artist Wally Wood, home to the Agents of W.O.N.D.E.R.
      • Earth-40, an Evil Counterpart to Earth-20 where villains rather than heroes triumph, featuring Lady Shiva, Vandal Savage, Count Sinestro, Blockbuster, and Doctor Felix Faust as the Society of Super-Villains.
      • Earth-41, home to Spore and Dino-Cop, a world where so many heroes differ in terms of style and ideology, it's as if they were each dreamed up by individuals who had specific images and ideals of their heroes.
      • Earth-42, home to imp-like versions of the Justice League known as the Li'l Leaguers. They're actually robots.
      • Earth-43, which has a Vampire League and is home to the Batman Vampire Elseworlds trilogy.
      • Earth-44, the world of the Metal League, a fusion of the Justice League and the Metal Men, led by Doc Tornado.
      • Earth-45, an Earth where Superman as a concept became perverted and corrupted by mass marketing and turned into the hyper-edgy Superdoomsday, whom later went on a homicidal rampage killing the Supermen of other Earths before being stopped by the Superman of Earth-0 in Action Comics (New 52).
      • Earth-47, a world where The '60s never ended, home to the Love Syndicate of Dreamworld and immortal teenage president Prez Rickard.
      • Earth-48, the new home to Lady Quark and Lord Volt. A world bred as protectors of the Multiverse, where everyone is a superhero and every event is a Crossover.
      • Earth-50, home to the Justice Lords from the DCAU.
      • Earth-51, the world of Jack Kirby's DC creations such as Kamandi and OMAC.
      • The guidebook covers 45 of the Earths, leaving 7 over for other writers to develop: 14, 24, 25, 27, 28, 46 and 49. There is also mention of Hypertime, a former method of incorporating infinite universes devised by Morrison and Mark Waid.
      • Earth-14 shows up in the Superman (Rebirth) story "Multiplicity", where it's home to the Justice League of Assassins. From what's shown, it looks to be an After the End Mad Max-style world.
      • Earth-1098 is the Elseworld's Finest: Supergirl & Batgirl universe, where Kal-El died before becoming Superman and Bruce Wayne never became Batman. Batgirl — Barbara Gordon — is Gotham's near-dictatorial protector, Wonder Woman leads the Justice Society and is Supergirl's — Kara Zor-El — foster mother, and Lex Luthor backs — and manipulates — the Society.
      • Morrison drew up a map of the DCU multiverse as it stood circa The Multiversity. Basically, the entire multiverse exists on a vibrational spectrum from red (matter) to blue (thought). At the centre, covering red and orange, is the Orrery of Worlds, with the 52 universes and the Rock of Eternity contained within the Bleed. Marking the boundary of the Orrery is the Speed Force Wall. Further out, from yellow to green, is the Sphere of the Gods, containing all of the DCU's various gods and archetypes — this is where Apokolips, New Genesis, the Dreaming, the Silver City, etc., are. At the border of the Sphere is Limbo, where the lost and forgotten of the Orrery end up, characters like Merryman that were lost to history. Blue is the Monitor Sphere, where the Monitors used to oversee the Orrery before their unmaking in Final Crisis. Marking the final boundary of the multiverse, and the limit to thought, at furthest blue-shift is the Source Wall, beyond which is the Overvoid, where lie the Monitor-mind that spawned the Monitors, the Source, and the Unknowable; in Morrison's conception, the white of the printed page panel borders in which all comics are enclosed.
      • In Doomsday Clock Doctor Manhattan discovers the multiverse changes itself in relation to the primary DC Universe, or the Metaverse.
      • Dark Nights: Metal introduces the Dark Multiverse, spawned of the hopes and fears of the local Multiverse's inhabitants, and begins adding new Earths to the bubble, starting with the 53rd Earth, where the Justice League are non-human primates.
      • One thing that should be noted about DC's local Multiverse is that the universes are connected through comic books, each Earth producing comics that recount what's happening somewhere else in the Multiverse, even if most people think they're fictional. This has long standing at DC — in the Silver Age, Earth-One's Flash, Barry Allen, read comics about Earth-Two's Flash, Jay Garrick.
    • The WildStorm multiverse consists of a 196833-dimensional snowflake-shaped arrangement of universes, flat sheets of information that their inhabitants interpret as three-dimensional (or what have you). Between them is the Bleed, red swirly stuff of vaguely-defined properties. The Bleed, if not the snowflake, was incorporated into The DCU.
      • After the New 52 reboot/relaunch in 2011, there is no known "Wildstorm multiverse" anymore, with all the Wildstorm characters and stories incorporated into the rebooted DC Universe. It may still exist, however, somewhere within the larger 'Multi-Multiverse'.
      • 2017's rebooted Wildstorm universe is separate from the DCU, with both having their own versions of Wildstorm characters. As yet, the rebooted 'verse has no assigned number.
    • The DCU and Marvel Universe are also part of one omniverse as evidenced by crossovers that have been referenced later by both companies (making them canon). Both also contain multiple alternate futures and the characters from the past and future of other universes. Now, go back and read that again.
    • A number of Marvel stories deal with and take place in these; appearances of the heroes in other media also fall under this category. Most prominent (and Alternate Continuity examples) are listed below. Notably, the main continuity is not Earth-1 or Earth-Prime, it's Earth-616.
    • The Spider-Verse storyline. Just... The whole thing.
    • With the massive multiversal shake-up Secret Wars (2015) is causing, it remains to be seen if we'll have a new, entirely renumbered Multiverse (most cross-media franchises not counting).
    • Warren Ellis' run on X-Man utilized another conception of the multiverse, where in addition to Parallel Universes, there's a "spiral of realities" stretching above and below, with the universes "downspiral" being significantly more chaotic and difficult for life to develop/survive in than the the relatively advanced and idyllic universes located "upspiral".
    • There are in fact two types of alternate universe in the Marvel Universe. The first are different dimensions adjacent to the regular 616 verse, such as the Microverse and the various magical verses; the second are parallel universes, which are usually alternate timelines, and presumably each has its own adjacent verses too. It's not always clear which is which — the Negative Zone, for instance, is vague on if it is the first or second kind, so the one encountered by the regular Fantastic Four and their Ultimate counterparts could actually be one and the same (and the Nihil encountered by the latter wasn't a counterpart of the regular FF foe Annihilus, but a member of the same species — which is why he referred to himself as a member of a "caste" and already knew who Reed Richards was in their first meeting).
  • The comic Fables mainly features our own world, but also a indefinite number of Fairy Tale worlds which are connected by gates. The gates to our world are closely guarded by the New York Fables since they were conquered by the Adversary.
    • This latter plays a role in the War against the Adversary.
  • So did the comic book Grimjack.
  • Ghostbusters (IDW) establishes that there are multiple Ghostbusters universes: One in which Ghostbusters (1984), Ghostbusters II, the 2009 video game, and the IDW series take place, one in which the animated series The Real Ghostbusters takes place, and the films are fictional; one in which time's further ahead than in The Real Ghostbusters universe, so it's in the Extreme Ghostbusters era; further universes featuring other Ghostbusters media and fan productions; and most recently the Ghostbusters (2016) universe. There have been several crossover events, leading up to an Infinite Earths-style event. Incidentally, the Ghostbusters got their interdimensional crossover tech from Donatello during a crossover with Teenage Mutant Ninja Turtles (IDW).
  • The Invader Zim (Oni) comics have had this concept show up a few times:
    • In Issue #5, Gaz mentions she had to look through various alternate universe before finding the one dominated by gamers, represented by a montage of panels showing alternate versions of Zim and GIR in a few of those universes.
    • In Issue #32, during the final portion of the Physical Fitness competition, Zim and Dib are so determined to win that they do infinite pushups, somehow causing themselves to transcend out of their universe and into multiversal space, where each universe is represented by giant sentient ab muscles. The muscles warn that the ongoing pushups threaten the fabric of reality, and offer to send the pair to their choice of paradise universes if they stop. However, they're both too stubborn and keep going, causing versions of themselves doing pushups to appear in multiple universes.
    • In Issue #40, a "cosmic mistake" causes Recap Kid (the comic series' omniscient narrator) to get sucked into the space between universes. There, they meet their counterpart the Recap Brain, who shows them numerous other universes in an attempt to get them back to their own. These include one where the basic Invader Zim plot is medieval fantasy instead of science fiction, one where Zim is a superhero and Dib is his Evil Genius nemesis, one where Zim and Dib's lives are the plot of a musical play, one where everyone in the world is blatantly nice, a universe that takes the form of a "depressing indie film", and one where Zim and Dib are sentient beans.
    • This is a major plot point in the Battle Void arc (Issues #46-#49), as Zim and Dib end up in a Portal Crossroad World populated entirely by alternate counterparts of Zim from various other universes.
  • Issues #17-20 of My Little Pony: Friendship Is Magic (IDW) features a magic mirror that takes explorers to various Alternate Universes. The focus of the arc is on one Bizarro Universe, with evil versions of the good characters and vice-versa. The crisis occurs because Celestia falls in love with the alternate world's King Sombra, but their travels have weakened the bonds separating the realities, allowing the alternate world's Celestia to try and take over both.
  • Pathfinder: Worldscape takes place in a demiplane that draws living beings from three separate worlds — Earth, Golarion (Pathfinder's setting) and Barsoom (better known as the planet Mars where John Carter of Mars/Warlord of Mars takes place), and even individuals from different versions. For example, Red Sonja and Kulan Gath hail from the Hyborian Era, a period in Earth's pre-history that is radically different from the Earth that John Carter came from. Likewise, the White Martians encountered in the Worldscape are noted by Carter to not be the same ones he fought in his past and they must have belonged to another version of Barsoom.
  • Very early on, Sonic the Hedgehog (Archie Comics) parodied the DC multiverse with a literal "superhighway" connecting the various worlds. In a Bizarro Universe, Dr. Eggman is a kindly veterinarian, while Sonic and his cohorts are evil hooligans in biker outfits. In another, Dr. Eggman was nearly defeated by the Freedom Fighters, but turned himself into a robot as a last resort (and he's even more kill-crazy than the original).
    • Every Sonic game and television show is in canon, except that most exist in multiple universes, or 'Zones'. This includes: The 'Prime' Universe, the Sonic Rush Dimension, the Sonic Underground Universe, the (inevitable) Sabrina the Teenage Witch crossover, and a Sailor Moon-inspired universe where Knuckles wears a tuxedo. Go figure. The "real" world is yet another universe, and features lawyer-friendly versions of Fox Mulder and Dana Scully, hot on the trail of a giant blue talking hedgehog. (Sonic Live)
      • The lawsuit-forced Cosmic Retcon following Sonic the Hedgehog/Mega Man: Worlds Collide caused the entire multiverse to collapse on itself and be reborn. That basically put a stop to the universe hopping in the entirety of the comics, and the concept died completely when the comics were cancelled in 2017.
  • The comic books Those Annoying Post Bros and Savage Henry focus on Bugtown, a infinite-sized City of Adventure which connects to an infinite number of alternate worlds.
  • Zenith, a 2000 AD series, features this. Perhaps not surprisingly, its author Grant Morrison is one of the creators responsible for bringing back the DC multiverse.

    Fan Works 
  • A.A. Pessimal has created several ongoing tales concerning the Discworld contacting various aspects of "Roundworld" (see below). Ponder Stibbons, who is perhaps more of a research and theoretical physicist than a Wizard, finds himself among congenial like minds when he visits the Roundworld of The Big Bang Theory in The Many Worlds Interpretation. His Assassin girlfriend also finds friends she can bond with in Penny, Bernadette and Amy. In future chapters, Sheldon Cooper and the gang get to visit the Discworld. Mayhem and misunderstanding ensue.
    • In another fic, Doppelgangers, the loose ends concerning Rincewind's temporary visit to Earth as Professor van Rijnswand are dealt with. It is discovered that all Discworld people have identical body doubles on Earth. This explains a lot.
  • The Bloody Rose Series is a metaseries of different fanfiction series in a shared multiverse, starring the Japanese pop idol group AKB48.
  • The Blooming Moon Chronicles, as its alternate name, The 99 Worlds Saga, suggests, features many different alternate worlds revolving around a single core world (the world as depicted in My Little Pony: Friendship Is Magic). The further away a world is from the core, the greater the differences between that world and the TV show.
  • The Chance Encounter crossover series Uses this as a plot device, with the main characters hopping around a collection of universes (LOTR verse, Kingdom of Heaven verse, POTC universe and the Troy universe), mostly by means of shipwreck.
    • The travel method has become something of a Running Gag, with one of the main characters (Balian) being regularly advised to stay on land. Even that doesn't work. Mostly they tend to arrive in tree's, leading to Legolas remarking that whoever organises these jumps has a serious lack of imagination.
  • Used in Code Geass: Occulta Rising.
  • Code: Pony Evolution uses this to explain how the worlds meet.
  • Crossover Chaos takes this trope and runs with it, not only in terms of Canon Welding all the series featured (as well as Real Life) into one functioning universe, but also the fact that there are many alternate versions of the main universe, which the main universe characters have gone into, and met people from, countless times before. It's implied every piece of fiction ever does, did, and will exist pretty much exists in multiple forms within the series' multiverse, and the same goes for Real Life as well.
  • A Crown of Stars: Throughout the history Asuka and Shinji travel between dimensions several times and meet several of their other-worldly counterparts. King of Avalon Daniel rules a chunk of the multiverse. He has seen and visited many alternate realities.
    Ching:"Infinite universes, almost anything happens. Doctor Faustus happened somewhere, The Iliad happened somewhere, and Neon Genesis Evangelion happened somewhere. Your world was a darker story of what might have come next."
  • A large number of Dark Mark's DC Universe fanfics are set in the same Multiverse. Kara of Rokyn alters the outcome of Crisis on Infinite Earths, saving the infinite parallel universes and spawning new parallel dimensions, some of them seen in Hellsister Trilogy and A Force of Four, whose heroes every so often interact with each other.
  • The premise of Eggman Generations, with three versions of Eggman gathering a group of their alternates, so that they can come up with a clan to beat Sonic.
  • The Emiya Clan runs on this. With a few exceptions (the Shonen Jump big three, Warhammer 40k, Fairy Tail, DBZ, and a couple others forbidden by the community) every fictional universe is stated or implied to exist somewhere and in some capacity. As such, the possibility for shout outs and crossovers is huge. Whether through time travel, dimension hopping, space, or magician relatives, any idea can make an appearance so long as the authors approve it.
  • Evilhumour has the "Powers-That-Be" multiverse that ties in a lot of his My Little Pony: Friendship Is Magic fanfics, with at least fifteen (or more) universes in a set of linked but separate versions of Equestria. These universes include the Blinds-verse, Broken Star-verse, Cassius-verse, Diplomacy-verse, Doa-verse, Galloping Waves-verse, Harvest-verse, Pieces-verse, Reflecting Shield-verse, Suspenders-verse, Testing-verse (with two branches), Two Moons-verse, Worlds-verse, Survival and Twisted Fate. Connecting elements include the presence of "Powers" in each world, a set of entities who each have a Purpose, Role and Duties, and their involvement with their worlds and others.
  • Major staple in Hottie 3: The Best Fan Fic in the World on the count of it being a Massive Multiplayer Crossover. There is also the concept of the omniverse, a multiverse of multiverses. There are a total of thirteen multiverses in the omniverse.
  • The Infinite Loops start because the computer the multiverse runs on had a system crash.
  • Suzumiya Haruhi no Yaku-Asobi adds a multiverse (and sliders) to the list of crazy things caused by the incident "three years ago". At least two slider factions consist of empires that span multiple dimensions (one of which officially encompasses around 500 and is ruled by an expy of Saber).
  • The author Kanius and his contributors has their concept by having Sailor Cosmos living in the Galaxy Cauldron to connect many nexus dimensions. This is where the universes of Digimon Fusion Kai (DF-616), YuYuGiDigiMoon (YYGDM-01), and Digimon Accel Stream (XLR-8) exist to have their stories as part of ‘the Triad’.
    • An alternate future of Digimon Fusion Kai called ‘DF-811’ is where a Future Trunks expy lived and travel back in time to the main DF-616 dimension. The Crystal Tokyo timeline is a separate dimension that's part of YYGDM-01's future. At some point, the dimension of Digimon Fusion is involve with them.
    • There are also other universes that references them such as Guilty Crown: The Lost Kingdoms (GCLK-1113) alongside Kanius Production Abridged (Shared Character Corner, including Shinnen New Year that takes place as the series finale).
  • Mirror Multiverse uses this as a plot device, with the main characters hopping around a collection of universes.
  • My Brave Pony: Starfleet Magic: Unicornicopia is supposedly part of only one of many dimensions in a multiverse, whose worlds the unicorns can visit. But the author repeatedly mixes up the terms planet and dimension to the point where he refers to the planets themselves as other planes of reality.
    • The remake attempted to fix this by saying that they are in fact planets, but transportation between planets is still called "dimension travel".
  • League of Extraordinary Gentlemen: Tempest Rewrite: The existence of the world of LXG (and this fic) is explained using the The World as Myth concept from The Number of the Beast, and is also revealed to be a part of the Eternal Champion multiverse
  • The Pony POV Series establishes one of these when Applejack looks into the Truth and sees a multitude of Alternate Universes, many of which are Shout Outs to other fics or anime/cartoons/television/etc. It's also with noting that the series uses The Multiverse — it's stated several times that all of these universes exist, and are all as real as the main series universe. Also, it's mentioned that all these universes are connected to a "Heart World" (strongly implied to be the canon universe); changes in the Heart World affect the other worlds connected to it, but if these worlds are somehow disconnected from the Heart World (as AJ does for the POV-verse in "AJ's Dream"), they are free to continue on their own without being contradicted.
    • Of all the universe shown, a couple get special attention and focus. First, there's the "Orangejack" universe, which shows what would have happened has Applejack chosen to stay in Manehattan — Big Macintosh becomes the Element of Honesty in his sister's place, while she becomes a successful businessmare, meets the love of her life and has children. Applejack ends up meeting Orangejack, and together they defeat their potential Nightmare-self, Nightmare Mirror. The other universe, which gets even more attention, is the Epilogue timeline, which shows what would have happened had Discord won — he turns the discorded Mane Six into his enforcers, and turns the world into Pony Hell.
    • There are also a few bits of Recursive Fanfiction that are written as Alternate Universes to the main POV-verse, but so far only one has been declared official by the main author.
  • Royal Heights works on the concept that there is only one Universe that permits a multitude of dimensions to exist. These dimensions all have their own laws and physics and general rules but the academy and the technology it provides is the main way for the members of these dimensions to interact with one another.
  • Stars Above uses this concept.
  • The Subspace Emissary's Worlds Conquest is a multiverse of all the video game settings the author can think of.
  • The Multiverse plays an important part in Super Milestone Wars and its sequel.
  • The Multiverse also plays an important part in The Sweetie Chronicles: Fragments: each of Twilight's fragments was placed in a different universe, which Sweetie Belle must then travel to and collect.
  • The Multi-Dimensional labyrinth concept described by the Anti-Spiral in Tengen Toppa Gurren Lagann has the potential to incorporate all of Gurren Lagann's Parallel Works, as well as any and all forms of fan-fiction, as canon because the Alternate Universes that make up the Multi-Dimensional Labyrinth are created the instant they are perceived.
  • The Bridge eventually develops one of these, as while it starts with just Equestria and Terra (the Massive Multiplayer Crossover Kaiju version of Earth), it also later adds on Zenith, the Equestria Girls universe, the Power Ponies universe and its EG counterpart, as well as a Mirror Universe of the latter, the Mirror Universe of Equestria from the comics and its Terra counterpart, and in a later crossover story brings in The Shimmerverse as another separate universe.
  • The Lone Traveler stories. Basically the author took the idea of Quantum Leap and merged it with a Harry Potter from the Nightmares of Futures Past prologue. Something goes wrong with the ritual and Harry begins leaping, not through time, but through the entire multiverse. Stories crop up about him under the moniker 'The Lone Traveler'
  • The PreDespair Kids touches on this concept from time to time, as the story itself gradually moved into an Alternate Universe for Danganronpa, especially after Mukuro's Heel–Face Turn and Mikan's false betrayal. Besides that, the anons sometimes bring up events or ideas that have yet to, didn't, or couldn't occur as a result of the changes, and are thus treated like alternate universes and timelines.
  • Thousand Shinji: In the original series, Third Impact created thousands of alternate universes. The "Thousand Shinji" timeline is part of a multiverse which includes the timelines of Shinji And Warhammer 40 K, Once More with Feeling, Children of an Elder God and Nobody Dies.
  • Weiss Reacts is set in this, along with Lucina Reacts. The other verses are accessible by the Outrealm Gate and Blake's Lagann.
  • With Strings Attached takes place in or mentions at least six different universes, and Jeft refers to existence as the Infiniverse.
  • Project Dragon, Project Wildcat and Project Hound, three long lists doccumenting the many versions of Sash Lilac, Carol Tea and Milla Basset (respectively) from Freedom Planet, with the No-Zone acting as a backdrop. It is a collaborative project, with others able to suggest Lilacs, Carols and Millas to add to the lists, and stories have been made using them, such as here.note 
    • This would later be extrapolated on with Project Panda, a multiverse list for Neera-Li, with similar lists for Torque and Spade being said to be coming soon.
  • Adjacency: A Magic Mirror allows Twilight and Trixie to travel to multiple Alternate Universes of Equestria.
  • This is an extremely prominent trend in Undertale fan works, as the sheer number of Recursive Fanfiction has created many Massive Multiplayer Crossovers. In fact, several Original Characters were created specifically to function in a multiverse setting, such as Ink and Error — the Creator and Destroyer of Alternate Universes respectively. One of the best examples is Underverse, which essentially covers a war across the Multiverse as Cross is trying to restore his Universe to normal, while Ink and Error are balancing their truce on a tightrope, XGaster plans to conquer the original world and every other Universe in existence (all fanworks from other creators) gets dragged into the conflict in some fashion.
  • Not the intended use (Zantetsuken Reverse) reveals that there are multiple different universes where all the different characters are from. In fact, there is this one city where everyone has a doppelgänger from another dimension running around. Naoki blames a good chunk of the chaos on himself as he tried to recreate his original reality but was unclear on the details.
  • The Dimensional Drifter: The summary itself admits that for Judai, multiversal travel is just another Tuesday for him. So the news that the dimension he ended up in is part of a set of dimensions separate from the one he is familiar with, and that said dimensions are at war with each other is not really a surprise to him.

    Films — Animation 
  • Spider-Man: Into the Spider-Verse posits that there are an infinite amount of realities, six of which collide in the movie, with each bringing in their own Spider-Person. Plus two more in The Stinger. This is caused by the villain, Kingpin, building a machine to navigate the multiverse so he can find a universe where his wife and son are still alive and bring them back. However, beings native to one universe can't stay in another too long, as they begin breaking down on the cellular level. The plot quickly becomes a matter of not only stopping Kingpin from destroying New York in a reality-breaking universe crash, but also returning the alternate Spider-People home before they all die a slow and painful death.
  • Phineas and Ferb the Movie: Across the 2nd Dimension, a Made-for-TV Movie based on the Disney cartoon, spends most of its time between the "main" dimension where the TV show is set and the titular 2nd Dimension. As Baljeet-2 explains, the mulitversal flow of energy works like a clock — it's relatively easy to follow the energy flow clockwise, but going counterclockwise will require either an Other-Dimension-Inator or a truly absurd amount of energy, and there's an unknowable number of dimensions one must go through to return to their starting point. The musical number "Brand New Reality" sees the characters from the first dimension take the long way around to get back home.
  • Teen Titans Go! vs. Teen Titans not only has the Teen Titans of the 2013 animated show team up with the Teen Titans of the 2003 show, but also has them encounter versions based on prior episodes from Teen Titans Go!, which were theorised earlier in the film and even from other DC media. They eventually all team up to form the Teen Titans of Infinite Earths.

    Films — Live-Action 
  • Army of Frankensteins: Each Frankenstein is from a different universe, due to an experiment Gone Horribly Wrong rupturing a hole in the Multiverse.
  • The sci-fi thriller Coherence explores the idea of Alternate Timelines crossing paths during a Temporal Paradox caused by a comet passing earth.
  • DC Extended Universe:
    • In Zack Snyder's Justice League, a dialogue between Steppenwolf and Diana indicates that the forces of Darkseid originate from "the dark place", meaning its own universe and not just somewhere else in the physical plane. Steppenwolf even mentions that the end goal of Darkseid is the domination of the Multiverse.
    • The Flash is the first DC Comics-inspired film to explore the concept. It will feature Barry Allen/The Flash (Ezra Miller) traveling to another universe's Earth and meet the Batman played by Michael Keaton. The Batman played by Ben Affleck will also appear in the film. The movie is a loose adaptation of the comic storyline Flashpoint.
  • The Marvel Cinematic Universe has the multiverse as a major concept.
    • When first introduced in Doctor Strange, the multiverse contains every dimension in existence, such as the Quantum Realm and Dark Dimension.
    • In Loki, it's revealed that the multiverse contains every single timeline in existence. Initially, the multiverse was discovered by a scientist simply known as He Who Remains. Alternate versions of this person discovered the multiverse at the same time, and the variants coexisted peacefully. However, some power-hungry versions of He Who Remains sparked a multiversal war that threatened the destruction of everything, so He Who Remains reorganized every timeline in the multiverse into one singular timeline in order to prevent his variants from reemerging. However, after Sylvie kills He Who Remains, the multiverse is fully reborn.
    • This concept of the multiverse is further explored in What If...?, with each episode exploring an alternate takes on various events from films in the MCU.
    • In Spider-Man: No Way Home, folks from alternate universes with connections to Spider-Man — i.e. characters from the Spider-Man Trilogy and The Amazing Spider-Man Series — start appearing in the Marvel Cinematic Universe. Initially it's just villains, specifically Green Goblin (Willem Dafoe), Doctor Octopus (Alfred Molina), the Sandman (Thomas Haden Church), the Lizard (Rhys Ifans) and Electro (Jamie Foxx). In the third act, Tobey Maguire and Andrew Garfield also appear, reprising their respective roles as their own individual incarnations of Spider-Man.
    • Doctor Strange in the Multiverse of Madness has Stephen Strange and other characters traveling between universes and meeting variants of themselves, their friends and enemies, and characters from other corners of the Marvel universe (i.e. from live-action Marvel properties that weren't/aren't canon to the MCU). Most notable is Strange's meeting with the Illuminati on Earth-838, which consists of variants of Baron Mordo, Peggy Carter, Maria Rambeau, Black Bolt, Reed Richards, and Charles Xavier.
    • The mid-credits scene of Venom: Let There Be Carnage shows that Sony's Spider-Man Universe also exists within the MCU multiverse, as Eddie and Venom travel to the MCU and see Spider-Man's true identity be exposed, until the post-credits scene of Spider-Man: No Way Home, where they’re suddenly teleported back to their own universe, while unknowingly leaving a piece of symbiote behind. Meanwhile The Stinger for Venom (2018) said that the events of Spider-Man: Into the Spider-Verse took place at the same time as the film but in a different universe, making that film part of the MCU multiverse.
  • The Big Bad in the movie Last Action Hero discovers since he can cross over to other movies and other worlds, he can bring back the worst of the worst villains. They'll have a formal party: Freddy Krueger and Jason can supply the meat, Hannibal Lecter can do the catering, etc. And it will all take place in what is apparently the "Real World", because here the bad guys can win!.
  • The basic premise of The One is that Gabriel Yulaw defected from a group known as the Multiverse Authority after killing one of his counterparts, which allows him to absorb their power and become more powerful. His new goal in life to destroy every single one of his counterparts and become a God, with the slight problem that, since the collective energy of his counterparts is divided among all of the survivors, his last counterpart is equally as powerful.
  • The setting of Parallels.

  • Anathem by Neil Stephenson combines this with of all things Platonic Epistemology to very severely deconstruct many aspects of the multiverse. For example, atomic nuclei are subtly different between universes so any reaction between molecules from different universes is retarded (i.e. breathing).
  • Astral Dawn by Adam R. Brown tackles this in a somewhat different way, as the multiverse is referred to as the Nursery of Dimensions. A race of extradimensional aliens called the Aash Ra are charged with safeguarding the Nursery. A single universe out of the multitude lies at the heart of the Astral Dawn saga. Because of its nature, it is called the anomalous dimension.
  • Bazil Broketail: The books' universe has many different worlds and planes of existence over which the battle between good vs evil is waged.
  • Variation: Timothy Zahn's Cascade Point stories feature a faster than light drive system which has the side effect of showing you alternate versions of yourself whenever you activate it, based on different possible outcomes of your life. At least one story features a Phlebotinum Breakdown that drops the ship into one of those universes. It is a Multiverse, but it's not one where you can easily travel between worlds.
  • Kate in Choices by Deborah Lynn Jacobs. After her brother dies, she starts traveling between new universes with only slight changes from her own. For example, in one she was a pushover. In another she was a Perky Goth. She would usually go to sleep and wake up in a new universe.
  • Roger Zelazny's The Chronicles of Amber has one reality, Amber, which casts an infinite number of Shadows, each one a full world (with Earth among them). The Princes of Amber can travel at will to these worlds by using Tarot cards as portals, or by walking the shadows and altering them until they stand in the world they desire.
  • The Coming of the Quantum Cats, while generally forgettable, has some fun with this trope. The great scientist Dominic Desota invents a machine for traveling between universes, but in one universe it's stolen by General Desota, who aims to become a Multiversal Conqueror. Opposing him are the heroes, Senator Desota and Nicky Desota.
  • The Crew of the Copper-Colored Cupids features many groups and agents (including the titular clockwork cherubs) who travel the multiverse; the Cupids themselves are based in a pocket dimension all their own, and thus all of their missions involve dimensional travel.
  • Colin Kapp's The Dark Mind (also published as The Transfinite Man) uses this. The alternate universes were originally empty until mankind (in the form of the evil Failway Company) discovered them and, basically, turned them into vice dens.
  • Stephen King's The Dark Tower series and the numerous books that feed into it (or got sucked into it) is based on the notion that all of the weird alternate realities visited by the Gunslinger, plus all of the alternate continuities of King's earlier books are part of a Multiverse that are all connected by the eponymous tower. All these worlds are apparently subservient to the world in which the fictionalized version of King lives, and the characters discover that they are all in fact being channeled by King the novelist, a la Stranger Than Fiction.
  • In the Darwath series by Barbara Hambly, master wizard Ingold Inglorion crosses from Darwath to Earth via "the Void." He later describes the Void as a sort of super-universe that contains many separate, more or less parallel universes. When protagonists Gil Patterson and Rudy Solis are in Darwath, Gil notices that the stellar constellations look similar to Earth's, suggesting that Darwath is a parallel Earth. All of the animals and plants of Darwath are also analogs of known Earth animals, save for a few that were obviously created by magic.
  • Diana Wynne Jones's series, standalones and short stories often feature Multiverses or at least two different alternate realities. Count them:
  • The Discworld novels often allude to a multiverse. Since all libraries, everywhere, in every space, universe and time are connected, you can reach this L-space in the Library of Unseen University. If the Librarian lets you in, of course.
    • Also, in The Colour of Magic, Rincewind and Twoflower briefly find themselves occupying/incarnated in/deluded into thinking they are alternate universe versions of themselves, sitting next to each other on an airplane in a world that appears to be our normal Earth.
    • Our Earth plays a greater role in the Science of Discworld series, where the wizards know it as "Roundworld".
    • Moreover, the existence of alternate worlds (i.e. different legs of the Trousers of Time) is a given in several novels. Granny Weatherwax starts picking up random memories from these alternate worlds in Lords and Ladies, and Sam Vimes accidentally swaps P.D.A.s with his ill-fated counterpart from an alternate world in Jingo.
    • Also in Lords and Ladies Ponder Stibbons (a wizard version of a physicist) tries to explain the "many worlds'' principle to the Archchancellor (chief Wizard). Of course this goes badly as the Archchancellor is mainly concerned about why his trousers have anything to do with it, and why his parallel self never sent him a wedding invite...
  • Isaac Asimov's The Gods Themselves is about the discovery of a way to transport materials from our universe to another onenote  where the Laws of Physics operate slightly differently than they do here. The practical upshot of this is that the difference in physical law can be harnessed to create free, unlimited power. It's eventually discovered that continued use of this power source will result in the Solar System collapsing into a quasar. Worse yet, the aliens from the other dimension who created this transdimensional transportation technology are fully aware of this, and are taking advantage of our desire for free energy to prolong the life of their own star.
  • His Dark Materials features many an Alternate Universe, with a few powerful items allowing one to travel between them. There may be no limit to the number of separate worlds and universes.
  • In The Invisible Library, Irene is a Librarian for the Library, a mysterious Magical Library that collects rare books from every different version of reality (referred to as "alternates").
  • The core premise of the Lafayette O'Leary series. In The Time Bender, O'Leary finds himself transported to the kingdom of Artesia in an alternate universe. In The World Shuffler, he is transported to another world, Melange, which is a close parallel to Artesia, and even has alternate versions of several of the people he knows from Artesia, including his wife.
  • From a collaboration of Terry Pratchett and Stephen Baxter, the titular Long Earth is a series of alternate earths, each different, though the amount and type of difference between one and the next varies. Because of peculiarities of evolution, only one earth spawned humans and the vast majority never developed intelligent hominids of any kind, leaving the whole set in the care of one earth's-worth of humans, and their alternate-universe cousins, named after common fairy-tale creatures like elves and trolls. There are two unique wrinkles in the alternate-earth system presented in this series:
    Firstly, the earths are linked in a chain, and you can only "step" from one earth to one of the two adjacent ones; even stepping at high speed, it takes quite a while to get from one earth to a radically different one, although there are short-cuts that make long-distance "travel" more feasible. The chain might be infinite, or might be a closed loop. Secondly, each planet has its own chain of alternates; if you go to Mars, as occurs in the third book, none of the alternate Marses you can step to will correlate with any alternate earths in the chain you came from.
  • The trope's name, and, indeed, the basic modern concept for The Multiverse as its used in fiction, comes from Michael Moorcock's books. His many books range a vast array of worlds yet a sizable proportion of them are connected via Canon Welding. Robert A. Heinlein used this name in The Number of the Beast (see below) as well.
  • Introduced as the Whole Sort of General Mish-Mash in Mostly Harmless. As explained, any random slice of the Mish-Mash, at any angle, is seen by the inhabitants a functional 4-dimensional universe. This means that parallel universes a) aren't parallel, and b) aren't universes.
  • The Chronicles of Narnia mainly feature travel to and from Narnia, but in The Magician's Nephew it's explained that our world and Narnia are only two of a Multiverse of worlds. We only ever see three, though. Five, if you count the Wood Between the Worlds, and Heaven, although this it is portrayed as being as clearly and obviously different from the rest as a cube is from a square.
  • Briefly touched upon in The Neverending Story: Gmork's conversation with Atreyu in Spook City implies that Fantastica and the human world are part of one.
  • The entire point of the Paratime series by H. Beam Piper was that the main character's culture had exhausted its resources and was sponging off the entire Multiverse.
  • Perry Rhodan is explicitly set in a multiverse, but deliberate travel between different universes isn't easy or necessarily safe. Problems involve the (at Galactic tech levels) largely unsolved issue of trans-universal navigation and the problem of adapting to the new physical laws of the destination, which has resulted in "strangeness shock" rendering entire starship crews comatose for months on arrival in the past. The focus of the action thus remains on the default 'main' universe, though interaction with others (including one in which time runs much more slowly, one that consists entirely of antimatter, and one that was and presumably still is heading for an artificially accelerated 'big crunch') has occurred in the past.
  • The Quantum Enchantment trilogy and its sequel by Kim Falconer uses the 'many-worlds' concept as a plot device. Working from memory, there is a dystopian Earth a few hundred years in the future, and a completely separate world where magic and the like are common place. Throughout the series, the characters manage to get themselves lost in the 'corridors' between the worlds, often returning to what would be their home but for some sort of twist — a battle was won instead of lost, time flows in a different direction, person X never existed. It gets somewhat confusing after a while.
  • The Riftwar Cycle, by Raymond E. Feist involved several universes with magical travel between them. It's always dangerous though, because opening a hole in your universe may attract the attention of beings who were (barely) defeated once by gods...
  • Robert A. Heinlein has written about Multiverses more than once. The novel Glory Road has magical inter-universe travel, and several of his later novels (starting with The Number of the Beast) involve the Burroughs drive, an invention that lets you travel to other universes; but because of how the Multiverse works, those nearby universes will be the favorite fictions of the users of the drive. So you can leave Earth and the next universe over will turn out to be Oz... As a side effect, Heinlein managed to tie together practically everything he ever wrote into a single setting. He called his concept of fiction tied together through mankind's infinite imagination and the multiverse The World as Myth, and would use it to tie together not only every universe he ever created, but those of several other authors who wrote during his era as well.
  • Sergey Lukyanenko's Rough Draft-Final Draft duology is set in a multiverse where travel between universes is accomplished using the seemingly magical Towers which in reality were created through highly advanced technology developed by the natives of a universe that suffered a devastating nuclear war. It's initially assumed that there are about a dozen worlds, but it's later revealed that the number is much higher, possible infinite.
  • Vasili Golovachov's The Saviors of the Fan duology (made up of The Envoy and The Deliverer) has a myriad parallel worlds some of which are similar to ours, while others vary wildly. And that's just those organized into a linked structure called the Worldfan, of which our world is a part, with the implication that there are countless other worlds. According to the protagonist's half-Japanese friend, some of these worlds may be familiar from folk tales or science fiction/fantasy novels, as information has a tendency to "leak" between the worlds, meaning all those stories are actually true in other worlds. There is a world where the mere act of moving alters the surrounding reality (making finding your way back extremely difficult), or a world made up of a gigantic tree.
  • The setting of A Tale of the Unwithering Realm. Each version of Earth (called an "Aeon") in the Multiverse is an Earth where some Christian miracle never happened, which turns out to have major consequences, as each Earth is inhabited by various beings from mythology. The world of Cainem is one where humans were never exiled from Eden, and thus all are immortal (and not enjoying it at all); Thalassa is a world where Noah's flood never ended, and so it's inhabited by mermaids; Sidon is where David failed to kill Goliath, who begat a race of giants, and so on. The main villains, the empire of the Dark Tower, come from Ur, where the construction of the Tower of Babel was successfully completed.
  • The world of The Traitor Son Cycle is eventually revealed to be only one of multitude of "spheres", each sphere being its own universe. Various Wild creatures — as well as, apparently, humans — have arrived in it from other worlds, and the Powers That Be are fighting over this sphere because it contains gates that lead to seven others.
  • Sharon Farber's "Trans Dimensional Imports" (1980). Contact between universes is difficult because the necessary equipment has to be operating in both at the same time, but one scientist has succeeded in contacting her alternate self. They've build a minor business, trading literary works that exist in one world but not the other. With expanded bandwidth, they're considering other art forms. E.g. in one universe, Ronald Reagan went into politics, becoming governor of California. In the other, he had starred in a B-movie called Casablanca. So they agree to a swap — "You get a classic; we get a joke."
  • Transition by Iain Banks
  • In The Wheel of Time, there is a multitude of possible other 'verses, called the 'Worlds That Might Be', which are basically Alternate Universes. The less likely they are, the more faded they look. A channeler can be transported to one of these by using a Portal Stone and the One Power.
  • Andrey Livadny has decided to link his Long-Running Book Series The History of the Galaxy with several other works in order to create a new setting called The History of Worlds, which features five distinct parallel realities that make contact with one another. Each of those worlds has humanity go through radically different histories and, possibly, meet different alien races (apparently, humans are the only race that exists in all five realities). In one world (The History of the Galaxy universe), humanity has spread out into the galaxy, settling hundreds of worlds and encountering half a dozen alien races. In another world (Another Mind universe), humanity is still at the level of development of the early 21st century, when it comes under alien attack. In the Life Form universe, humans are busy settling the Solar System, planning to explore the galaxy using STL ships, when alien artifacts are discovered on some of the planets. In the Contact universe, humanity is exploring the stars using hyperspace with Earth becoming a City Planet and AIs everywhere. Then an archaeological dig on Ganymede finds evidence of multiple alien races. Finally, in the Omni universe, Earth is a radioactive wasteland following a mutually-destructive war between humans and Insectoid Aliens, whose homeworld was destroyed in retaliation for them nuking Earth. The remains of both races struggle to survive, while another race schemes to end them.
  • Worlds of Shadow: The story reveals alternate universes exist, and are nearly infinite in number. However only two others are actually shown: one is a sci fi style universe with an interstellar empire, the other a fantasy world. It's explained the universes you can visit must have features in common.

    Live-Action TV 
  • Frequently a Discussed Trope on The Big Bang Theory.
    Penny: What's a Multiverse?
    Sheldon: GET HER OUT OF HERE!
  • Charlie Jade: the Alphaverse (a Crapsack World and a Dystopia) is running out of clean water from its excessive pollution. So they use a portal to steal water from the utopian Gammaverse. Charlie Jade ends up in the world in between — the Betaverse, a.k.a. our world — when things go wrong with the portal. Later on he finds out that the hallucinations he's had through his life are actually the result of his ability to travel between the verses, and he returns home before deciding he liked the Betaverse better than Alphaverse. Long story short, the whole series is based around this trope, including the cliffhanger season finale (from which the show didn't get renewed) that would have revealed a fourth universe.
  • Community delved into the multiverse in Episode three, season three "Remedial Chaos Theory" where Jeff decides to roll a die in order to decide who has to get up to collect the pizza; in doing so, he creates six different timelines with vastly different outcomes. The die returns in the final episode of season four where they each face off with the victims of the die's worst timeline, the gang's "evil counterparts."
  • Doctor Who is a bit tricky. There are alternate timeline-style universes, like the fascist universe of Inferno, or Pete's World from "Rise of the Cybermen"/"The Age of Steel"; post-the Last Great Time War, it's potentially multiverse-destabilising for a TARDIS to hop between such universes. There are also pocket dimensions linked to the main universe, such as E-Space or the Land of Fiction.
  • The Flash introduced the idea of a DC multiverse, which can be viewed whenever Barry travels from one universe to another. So far, there is no official name for this multiverse. Two types of Earths are featured, those that are home to the CW, CBS and Netflix's DC superheroes, and those featuring characters who migrate to the featured Earths.
Earths Featured on the CW, CBS & Netflix Include:
  • The Arrowverse, named after the universe that began with an adaptation of The Green Arrow's origin story. In-Universe, it was given the nickname of Earth-1. That universe contains:
  • Supergirl (2015) has its own Earth, Earth-38, which has been visited by the Barry Allen of Earth-1 three times, usually during Crisis Crossover time.
    • Notably, at least two of the same alien races exist in both Earth-1 and Earth-38: Dominators (they invade Earth-1 in a crossover event and one is seen in Supergirl) and Thanagarians (mentioned in both Legends of Tomorrow and Supergirl).
  • The Flash (1990) is also confirmed to have its own Earth (Earth-90) within the multiverse, where the conceit of this Earth is "What if superheroes were active in the 1990s instead of the 2010s?" This Earth is identical to Earth-1, but several events and incidents from Earth-1 (especially The Flash (2014)) are depicted with the influence from a Barry Allen active as the Flash in the 1990s instead of the 2010s (such as the Trickster's initial crime spree in the 90s). Barry Allen from Earth-1 has briefly glimpsed this universe, but has not visited it yet.
  • Two Unnumbered Earths will be retroactively added to the Arrowverse, and are each homes to Black Lightning and Smallville's version of Superman. Both will appear in 2019's adaptation of Crisis on Infinite Earths.
Earths Occasionally Seen on Various DC Shows
  • Earth-2 is another universe, and was connected to Earth-1 in a freak accident involving a wormhole. It appeared prominently in season two of The Flash and has been visited by various characters of Earth-1 and Earth-3 several times.
    • A fact about this multiverse is that temporal changes on one Earth don't affect others, even if there were interactions between them. This comes to light, when Harry and Jesse return to post-Flashpoint Earth-1 and start noticing differences from what they remember during their last visit.
  • Another Earth-2 is featured on Smallville, where its conceit is "What if Clark Kent was raised by the Luthors instead of the Kents?"
  • Earth-3, first mentioned in the Flash season 2 finale and briefly visited in season 3. This is where the real Jay Garrick is from.
  • Little is known about Earth-12, except that it's home to Herr Harrison Wolfgang Wells, who appears to be a cross between "Harry" Wells and Steve Jobs.
  • Earth-15 is offhandedly mentioned to be a lifeless world.
  • Earth-19 is where Harrison "H.R." Wells is from. Apparently, that world has been invaded by another Earth at some point (the invasion was repelled at great cost), resulting in laws that punish attempts to travel to or from Earth-19 with death. The only ones allowed to travel this way are Collectors, whose job is to track down and capture violators. This world's Flash appears to be the Accelerated Man.
  • Earth-22 is a post-apocalyptic wasteland that appears to be a mix of Mad Max and Fallout, with Wells 2.0 being an Aussie cyborg.
  • Likewise, we're not told much about Earth-47, but its H. Lothario Wells is a "genius, billionaire, playboy philanthropist" with a dash of Hugh Heffner.
  • It was briefly assumed that the number of Earths is finite — 52 to be exact. Well, 53, actually, but nobody wants to talk about Earth-X, as it's a world where the Nazis won World War II. This is primarily where Freedom Fighters: The Ray is set, although the protagonist is actually from Earth-1.
  • The 2019-2020 Crisis on Infinite Earths Crisis Crossover destroyed and recreated the multiverse. A number of alternate universes are the settings of past DC shows and movies and were remade as original, others were repurposed as settings for newer shows:
Furthermore, Earth-1 (Arrow, The Flash (2014), et al.), Earth-38 (Supergirl (2015)) and the Earth of Black Lightning were merged into a single universe called Earth-Prime. The inhabitants of Earth-Prime are unaware of the continued existence of the rest of the universes, believing their universe to be the only surviving one.
  • In the middle of the first season, Fringe suggests a multiverse through the ZFT Manifesto. In the season finale Olivia goes there and meets Walter's old partner William Bell — in his office in the Alternative World's still-standing World Trade Center.
    • The Alternative Universe is further explored in Seasons 3 and 4, as both universes first suspect each other of trying to destroy the other and then team up to fight a common enemy. Two possible futures of the Prime Universe incorporated similar conditions as the Alternate Universe, in keeping with the idea that the evolution and decay of the Alternate Universe was slightly ahead of the Prime Universe. The show conveniently applied a red/blue color scheme to differentiate the "Red-Verse" and "Blue-Verse." The most prominent difference is the color of the Statue of Liberty: green in Prime and bronze in Alternate. This was frequently used to show which universe was being shown. Other differences between the universes are also shown, such as in the episode Olivia travels to the other Earth for the first time, is that the Twin Towers are still standing in New York City, suggesting the 9/11 terrorist attacks didn't happen, another episode has a theater marque in the 80s in the other universe label Eric Stoltz as starring as Marty in Back to the Future, and another states that there are diseases that there are vaccines for in the regular universe (which mirrors ours) that don't exist in the other one and, thus, are still plaguing at least America.
  • Kamen Rider is an odd handling of this: The Showa era shows all seem to take place in the same world, since veteran Riders would show up to help out the new guys, while the Heisei era shows all seem to be their own self-contained universenote . Then along comes Kamen Rider Decade, which portrays every series as its own separate universe, with their own Alternate Universes. In the final episode, a villain forcibly merges the universes together, then in the Grand Finale movie Decade performs a Heroic Sacrifice to preserve the memories of the Riders, and from that point on all Riders seem to exist in a shared universe as evidenced by the annual crossovers, not to mention the Super Hero Taisen movies where the Riders team up with the Super Sentai and Metal Heroes.
  • And speaking of Super Sentai, it's no less confusing. While it was stablished that Taiyou Sentai Sun Vulcan is a continuation of Denshi Sentai Denziman Showa era Sentai relegated any crossovers to side material of dubious canonicity, with the only evidence in-show that almost all shows were in the same universe being the first episode of Kousoku Sentai Turboranger. Then however, Kaizoku Sentai Gokaiger stablished all series take place in the same world, and it seemed to be like that ever since, with the exception of Uchu Sentai Kyuranger, whch is explicitly shown to be in its own universe. But then comes comes Kikai Sentai Zenkaiger, which stablishes all previous shows take place in their own worlds. Most people agree to not think too hard of it.
    • For the longest time, some fans speculated that, unless specifically stated otherwise, most of the shows in the franchise take place on alternate worlds. This is bolstered by in-universe retcons, such as the first 3 series featuring dinosaurs (Zyuranger, Abaranger, and Kyoryuger) depicting different ways of how the dinosaurs died out and the like. The same theory postulates however that there's a universe specifically for the various crossover movies and specials, which Gokaiger also takes place in, in which the various retcons and continuity gaffs don't exist and everything slots together neatly. This has never been explicitly stated by Toei or the production staff before Zenkaiger, though. Jonathean Tzachor, showrunner of various seasons of Power Rangers, is apparently a proponent of this theory and believes that every Power Rangers series takes place in its own universe as well, though that's not the official stance of the people higher up than he was who have controlled the direction of the franchise outside of RPM, Dino Charge, the MMPR movie, the 2017 movie, and possibly Beast Morphers.
  • In Lexx there are only the Light Universe and the Dark Zone. And the Dream Zone. And the Other Zone.
  • Nowhere Boys: In season 2, the multiverse is shown as being a part of Negative Space, a world between worlds. A Guardian protects the multiverse. A creature known as the Entity later begins destroying the worlds of the multiverse, but everything is restored when the Nowhere Gang defeat it.
  • Once Upon a Time and Once Upon a Time in Wonderland: Most of OUAT takes place in Storybrooke, a town created by magic that exists in the Land Without Magic, which is our "real world". The curse that created Storybrooke also trapped many people from The Enchanted Forest there, characters from various fairy tales and other stories. Other worlds include Neverland, Wonderland (in which Spin-Off series Once Upon a Time in Wonderland takes place), Oz, the Land Without Color (a Deliberately Monochrome world where Dr. Frankenstein is from), a Victorian England where Alice is from, a 1920s England where Cruella de Vil is from, The Underworld, The Land of Untold Stories (a universe that serves as a dumping ground for characters from stories that never finished), the Wish!Universe (a genie-created reality where Regina was defeated before casting the Dark Curse), and the Dark Realm (domain of the Black Fairy). Then Season 7 further complicates things by revealing that there are variations on the Enchanted Forest, to reflect the different versions of the stories told in our world.
  • Red Dwarf has an infinite number of parallel universes, and our heroes have crossed over occasionally:
    • "Parallel Universe" features a dimension where everyone throughout history is gender-flipped.
    • "Dimension Jump" introduces Ace Rimmer, Rimmer's counterpart from a dimension where he actually successfully became a Space Corps test pilot after being held back a year in primary school and resolving to do better. An alternate Lister also appears in the same dimension, here a flight engineer who is married to Kristine Kochanski.
    • "Stoke Me A Clipper" brings back Ace, who has since become a sort of dimension-hopping superhero (and a Legacy Character, with enough predecessors for their coffins to form an entire planetary ring). We see him in one dimension rescuing the Princess Bonjella from Nazis.
    • "Ouroboros" introduces Kristine Kochanski as a new cast member, originally hailing from an alternate universe where she was the sole survivor of the radiation leak that wiped out the crew instead of Lister.
    • Series 12 finale "Skipper" sees Rimmer use a dimensional skipper to visit various alternate Red Dwarfs. These include a reality in which the crew are still alive and everything is just like it was before the radiation leak in the first episode, except for the characters being about thirty years older (then there's a radiation leak); a reality in which Lister is cultured and sophisticated, and whose pet rat has evolved into a race of rat people that has overrun the ship; a reality with multiple clones of Lister and a reality where the crew is alive, Lister is captain and Rimmer his successful first officer, among others.
    • The Red Dwarf novels also play with the Multiverse idea, with the second novel Better Than Life reveal that there are seven universes, each accessible through black holes and wormholes via a realm called the OmniZone. Our universe is the only one where time runs in the wrong direction. Each universe also contains its own alternative realities, which play a part in the following novels Last Human and Backwards (each of which follows a different continuity).
    • The Red Dwarf Smegazine had a comic strip focusing on Ace Rimmer as he crossed into different universes and helped out their inhabitants. These include a reality where he and the rest of the cast were genetically engineered superheroes, one where the native Rimmer became a football player (and Zero Gee Football never became popular), a reality where Rimmer has become the Prime Minister of the United Republic of Lesser Britain (and the most successful politician ever), and a reality where Ace has become a bionic madman intent on destroying the galaxy, with the rest of the crew being hillbillies.
  • The TV show Sliders did this, although the heroes had no control over where they ended up each week.
  • In Season 1 Episode 10 of Shadowhunters Clary travels to an alternate universe where Shadowhunters defeated demons hundreds of years ago, causing there to be no need for them, while downworlders went into hiding to blend in with Mundane's. Clary and all her Shadowhunter friends ended up growing up with Mundane lives.
  • Kirk, McCoy, and several others were transported to a Mirror Universe in the "Mirror, Mirror" episode of the original Star Trek, in which a dark Earth-based empire ruled the galaxy. This was very much an In Spite of a Nail universe, since everything was much the same except the moral/ethical bent of the Federation's counterpart and its citizens.
    • Years later, the cast of Star Trek: Deep Space Nine returned to this universe to discover that the revolution Kirk had encouraged its native Spock to foment had happened; unfortunately, its effects were not necessarily for the better.
    • Star Trek: Enterprise revisited this again in "In a Mirror, Darkly", just to hammer it home that Humans Are Bastards.
    • Star Trek: Discovery revisits the Mirror Universe again during a four-episode arc of its first season, making explicit reference back to the events of "In a Mirror, Darkly."
      • Star Trek: The Next Generation had an episode with Worf bouncing between various In Spite of a Nail alternate universes. According to Word of God, this is distinct from the usual Mirror Universe though.
      • The showrunners of the new TOS-based movie series cite this episode, suggesting that the new Trek Verse (also known as the Kelvin Timeline or the Abramsverse) exists alongside, rather than replacing, the old one. The Expanded Universe definitely embraces this (stories in the old Trek Verse continue to be told rather than everything having to be based on Star Trek (2009) and Star Trek Into Darkness only. Stories unrelated to the new movies' events might reference the mysterious disappearance of a certain famous Vulcan in passing.)
      • Discovery explicitly references the Abramsverse in season 3 during a discussion of the Temporal Wars, reinforcing its existence alongside the Prime Universe as canon.
  • Stargate SG-1 had a handful of episodes where characters traveled to alternate realities. The first season finale's storyline was kicked off when Daniel accidentally activated an alien artifact and went to a timeline where he had never joined the Stargate program. A later episode used the same artifact to help an Earth in an alternate timeline that was faced with looming invasion, and other ways of accessing alternate universes were later found as well.
    • The season 9 episode "Ripple Effect" turned this Up to Eleven, with dozens of alternate universe versions of SG-1 coming through the Stargate due to some technobabble involving a black hole (and the meddling of one of the alternate teams.)
    • Stargate Atlantis also has several episodes that make use of the multiverse. The first has McKay's sister write an equation that allows connections to alternate universes to be made. McKay uses it to try to make an unlimited power source. The McKay from the universe he connected to has to cross the barrier to tell him it's a bad idea. The same technology was later used by McKay's rival back on earth to try to combat global warming (it didn't work). And yet another McKay from a different universe uses the same technology to build a Universe Hopping Starship (again, it didn't work) which sent the team from this universe on a wild ride. One just has to wonder if McKay really knows what he's doing when it comes to the multiverse.
  • Supernatural: Not only is there a Heaven, Hell, and Purgatory aside from Earth, but there are also multiple alternate realities, including one where the Winchesters' life is a TV show, one where the Apocalypse wasn't stopped in time, and one populated entirely by monsters. Essentially, they exist because God was bored and wanted more "toys" to play with; in Season 15, essentially throwing a tantrum over the Winchesters refusing to keep playing his game, he starts destroying every reality.
  • In 3rd Rock from the Sun there is a two part episode where the aliens visit an alternate universe (because they are bored) where they settled in New York instead of Ohio.
    Dick: You may see people you know too. But FYI they may have made different life choices.
    Harry: I see, in this universe Officer Don could be an old Vietnamese woman.
    Sally: No Harry, they have the same bodies. Dick is saying they'll all probably be gay.
  • The Twilight Zone (1959): In "The Parallel", Major Robert Gaines discovers that he has accidentally stumbled into a parallel world with a similar chronology to his own.
  • The Ultra Series has been established as such since the introduction of Ultraman Zero, who actually once got to see it in Ultraman Zero: The Revenge of Belial. See here.

    Myths & Religion 
  • Norse Mythology presents a cosmology of Nine Worlds, connected by a gigantic World Tree. This would include Asgard (where the gods live) and Midgard (Earth), but unfortunately we haven't found a definitive list of them, and piecing it together from what we do know has proven tricky (are Niflheim and Helheim the same place? What about Nidavellir and Svartalfheim? And what's up with Andlang and Vethrfolnir?)
  • Buddhist, Hindu and Jain cosmologies also speak of several realms or lokas. In the case of Buddhism there are six primary realms: human, animal, pretta, hell, deva and asura, each of it also subdivided (for example, there are ten hell sub-realms). Realm might mean both literally a plane of existence or a state of mind. And no, the Nirvana is not included, as it is a status and not a physical place.

  • In the first episode radio series Undone, Edna Turner discovers that she is able move between London, and its parallel city Undone, where weirdness leaks from. Slowly, she finds she is able to cross to over to other versions of London — such as Donlon, Londinium, Londres, and Lahndan (said in an over-pronounced cockney accent). Her job becomes to maintain the balance between the worlds, discovers her sister, and finds that they seem to be the only people who do not have parallel versions.


    Tabletop Games 
  • The GURPS supplement Infinite Worlds provides a setting and mechanisms for not only setting up a Multiverse incorporating all other GURPS books as a background against which to play, but also providing an interdimensional cold war as a driving force behind a potential campaign.
  • The trading card game Magic: The Gathering is set in a multiverse, with each expansion set representing a new universe (well, mostly). Originally this was referred to as "Dominia", but because of how easy it was to confuse with "Dominaria", one of the universes (the one that was the main setting of the game in its early days), it was renamed to simply "the multiverse". The game also implies that the players represent Planeswalkers, mages able to travel from one universe to the next essentially at will. The cards played represent magic and land discovered while exploring a given universe.
    • The casual variant Planechase literally represents the planeswalking with plane cards that affect gameplay and get cycled in and out as players shift to new worlds.
  • Dungeons & Dragons has developed no fewer than five separate multiverses across its prolonged history.
    • The oldest and most forgotten multiverse was built for the original Dungeons & Dragons gameline, centered around the setting of Mystara. This multiverse is made up of many different parallel dimensions and alternate realities... but because of age and the system's overshadowing by Advanced Dungeons & Dragons, nobody except the small, diehard fanbase really remembers how it was laid out.
    • Advanced Dungeons & Dragons, in comparison, built its own multiverse, which it names "The Great Wheel", due to it being physically represented as concentric rings expanding outwards. All of its settings are formally made up of this multiverse, which consists of the following planes: this is the most well-known of the D&D multiverses, and was used for both editions of AD&D and for 3rd edition.
      • The Prime Material Plane: Also alternatively known as either the Prime or the Material Plane, this is the "normal" reality, the mundane level of existence where all of the various setting worlds take place, the physical universe. The setting Spelljammer would further expand upon the nature of the Material Plane, declaring it a kind of Science Fantasy reality in which inhabited solar systems occupy "crystal spheres", which are bubbles of reality floating in an infinite ocean-like plane known as "Wildspace" or "The Phlogiston"; by breaching a crystal sphere and sailing through Wildspace, beings can move from the solar systems of the various settings.
      • The Ethereal Plane: The realm of ghosts and spirits, a misty mirror of the material plane.
      • The Plane of Shadow: Basically a dark and spooky mirror of the material plane, where light and dark have been inverted.
      • The Elemental Planes: An array of planes that are the metaphysical source of all elements in the multiverse. At their foundation are four "true" Elemental Planes — Air, Earth, Fire, Water — and two Energy Planes; Positive Energy (Life) and Negative Energy (Death). There are also four Paraelemental Planes, representing a conflux of two elemental planes (Ice: Air/Water, Ooze: Earth/Water, Smoke: Fire/Air and Magma: Fire/Earth), and eight Quasielemental Planes, representing a conflux between an elemental plane and an energy plane. The Positive Quasielemental Planes are Lightning (Positive/Air), Steam (Positive/Water), Mineral (Positive/Earth) and Radiance (Positive/Fire). The Negative Quasielemental Planes are Vacuum (Negative/Air), Salt (Negative/Water), Dust (Negative/Earth) and Ash (Negative/Fire)
      • The Astral Plane: Sort of the "elemental plane of thought", most notable for being the barrier realm between the Inner Planes (Material, Ethereal, Elemental) and the Outer Planes.
      • The Outer Planes: Seventeen different planes that embody different points on the 9-grid Character Alignment axis. The Morally Good planes are an assortment of heavenly realms known collectively as the Upper Planes. The Morally Neutral planes are called, simply, the Middle Planes. And the Morally Evil planes are an assortment of different hell-dimensions collectively known as the Lower Planes. Each individual plane takes its own particular spin on its general categorization; the plane of Arborea (Chaotic Good) is a realm of benevolent anarchy, whilst its neighbor the plane of Ysgard (which sits on the border of Chaotic Good and Chaotic Neutral) is a Valhalla-esque realm of glorious combat and self-satisfying struggle.
      • The Far Realm: A later edition to the game, basically the "Plane of the Cthulhu Mythos".
    • Planescape is unique amongst its peers in that it is a "cosmic fantasy" game; the focus is on exploring the Elemental, Astral and Outer Planes of the Great Wheel, instead of living on the Material Plane.
    • 3rd edition Forgotten Realms adds a whole bunch of specific planes for its god to inhabit, instead of their realms just being situated on the Outer Planes fitting their alignment as in at least 2nd edition Planescape. Of course, 2nd edition Planescape already stated that the borders between things like planes, layers and realms is a bit fuzzy, so the difference isn't so huge aside from losing the neat system of the Outer Planes.
    • Dark Sun officially has its own cosmology; the Material, the Grey, the Black, the Elemental Planes of Air/Earth/Fire/Water, and the Paraelemental Planes of Magma, Rain, Silt and Sun. However, it's revealed to Dungeon Masters that this is actually a result of Athasian ignorance of the wider multiverse, and in fact they inhabit the Great Wheel — just with a garbled picture of the cosmology.
    • Eberron inhabits its own unique cosmology, commonly nicknamed "The Orrery" due to its maps, made up of 13 planes (though one has been "removed". Its planes are Daanvi (Plane of Law), Dal Quor (Plane of Dreams), Dolurrh (Plane of the Dead), Fernia (Plane of Fire), Irian (Plane of Day), Kythri (Plane ofe Chaos), Lamannia (Plane of Nature), Mabar (Plane of Night), Risia (Plane of Ice), Shavarth (Plane of War), Syrania (Plane of Air), Thelanis (Plane of Faeries), and Xoriat (Plane of Madness). Despite some debate amongst the fandom, officially, the Orrery is separate to the Great Wheel.
    • In 4th edition, Wizards of the Coast replaced the Great Wheel with a new cosmology, smaller and more broad in its archetypes. This multiverse, known as the World Axis, is associated with the Nentir Vale, which was the core setting of 4th edition. The World Axis consists of the following planes:
      • The World: Realm of Mortals, the physical universe.
      • The Feywild: Realm of Faeries, a primal and magical mirror of the World, home to the fey.
      • The Shadowfell: Realm of the Dead, a dark and decaying mirror of the World, birthplace of the undead and first point of departure for the souls of the dead.
      • The Elemental Chaos: The Primordial Chaos from which the World and its mirror-realms were born.
      • The Astral Sea: Realm of the Gods and the afterlives of their chosen worshippers.
      • The Far Realm: The nightmarish unreality that lies outside of the World Axis, as in the Great Wheel.
    • In 5th edition, a new cosmology made up of the Great Wheel with a simplified array of Elemental Planes and incorporating the Feywild, Shadowfell and Elemental Chaos from the World Axis was released as the "default" multiverse of D&D. The Eberron multiverse is also considered a part of the Great Wheel, but it's not explained how.
  • Everway is a game about characters who can traverse a Portal Network which links a multiverse of fantasy worlds. Each world has its own distinctive flavor, drawing on various mostly mythical sources.
  • Lords of Creation was one of the earliest such role-playing games, where it was not only meant to be possible but common for players to travel through time and into alternate universes, allowing players to be thrust into any setting imaginable. Some of the premade ideas included elemental planes, a fantasy world where famous mythological gods reign, the star-spanning empire of Imperial Terra in the farflung future, and the city of Paris in the age of swashbuckling. Driving it all home, the final tier in most skillsets would be "futuristic/magical", which meant the character had learned how to do everything else that skillset (detective, soldier, doctor, etc.) allowed them to do, with the means available in sci-fi or fantasy settings.
  • Rifts is part of Palladium Books' "Megaverse", which includes all of its other games (naturally), plus a number of other realms with some of the games. The Rifts themselves are tears in the fabric of reality that have turned Earth into a sort of interdimensional hub which can connect to any and every other part of the Megaverse.
  • Naturally part of the setting of Sentinels of the Multiverse. The final expansion of the game deals with the end of that multiverse (according to Word of God, this is why the sequel game, Sentinels Tactics, doesn't include the word), and sees the heroes teaming up with alternate-universe versions of characters to stop an omnicidal Big Bad.
  • TORG deals with the invasion of Earth by several different realities (cleverly typified as various classic roleplaying genres), each of which is trying to change our local reality axioms to be like their own.
  • Wizards of the Coast long ago published a set of generic supplements for handling deities in roleplaying games, called The Primal Order. One of the books in this series, Chessboards, covered in exquisite detail how to design and manage an entire multiverse complete with cosmology.

  • Tsukipro is, at first glance, a series about Idol Singer groups who sometimes perform plays about a variety of fantasy settings — Steampunk, Space Opera, Yōkai, to name a few — where the characters they play are Alternate Universe versions of themselves. Oh, and the leader of one of the groups happens to flaunt his magic powers and call himself the "Demon King", what of it? Well, that's that until the idols get Trapped in Another World — again and again. Yes, all of these fantasy stories are real, they're out there, and they can connect with the main setting at any time. Oh, and Shun isn't just a wizard, he's probably a god.

    Theme Parks 

    • During the Karda Nui arc, a Teleporter Accident sends Takanuva to an Alternate Universe instead of Karda Nui. He spends the majority of his screentime traversing various Alternate Universes, until finally making it to his intended destination. Other characters, such as Vezon and Mazeka, also explore Alternate Universes in a similar manner.
    • A subplot featuring an alternate, benevolent version of the Big Bad crossing over into the main universe was set up during the same arc, but due to BIONICLE's abrupt cancellation, it ended up an Aborted Arc.
  • Transformers has a whole pile of alternate universes which sometimes cross over, and which Hasbro and Takara disagree over which are actually separate and which simply occur to the side of other stories. The Transformers of the Axiom Nexus have grouped all continuities into a number of universal streams, with each stream corresponding to a continuity group. Thus, for example, Primax is the G1/Beast Era family, Tyran is the live-action movies, Gargent is the GoBots, Quadwal is the real world, etc. Some of these are negative-polarity universes in which Decepticons are good and Autobots are evil; these are assigned negative numbers. To make things really nuts, there are also characters known as multiversal singularities, of which only one exists in all reality. Some of these, such as Alpha Trion, exist in every universe simultaneously, while others, like Vector Prime and The Fallen, travel between universes. There are also sparks that resonate across the universe, giving rise to multiple similar but separate versions of Optimus Prime, Megatron, Starscream, and various others.
    • It should be noted that this is All There in the Manual. There's no sign in any of the televised series or available-at-your-comics-shop comic booksnote  — that is, any canonical stories — that you could "slide" from Transformers Armada into Transformers: Animated, despite years of "collector's club" and convention exclusive materials that suggest you can. Fingers are still crossed around the fandom for a Turtles Forever sort of project someday, somehow.
    • The Transformers Aligned Universe, which includes Transformers: Prime, Transformers: Rescue Bots, the War for Cybertron video game series and the novels retelling the narrative of the games, are was originally considered to be outside this multiverse. However, Hasbro has since reversed this with works like Transformers: Rise of the Dark Spark and The Complete AllSpark Almanac, and it's been revealed to be part of the larger Transformers multiverse, after all.
    • An event called "the Shrouding" altered the nature of the Transformers multiverse, doing away with the concept of multiversal singularities and greatly strengthening the boundaries between dimensions.
    • The Facebook incarnation of "Ask Vector Prime" notes that the Multiverse can occasionally interact with a larger Megaverse, and beyond that is the Omniverse, which consists of every reality imaginable, as well as some that aren't. (Admittedly, it's a bit more complicated than that, but that's the basic gist.)

    Video Games 
  • Anachronox takes place in one universe but deals with the universe before this one and the universe after this one; if there was a second game, we would have gone to the former. Plot: In the next universe, two forces — "Chaos" and "Order" — are pitted against one another for survival. Order managed to trapped Chaos in this universe. Chaos is trying to find a natural doorway into the previous universe where it seeks to destroy this universe and the next universe, and Order in the process.
  • In BioShock Infinite, Elizabeth is able to open "tears" in the fabric of reality, which are open windows to parallel realities. One example is a 1980s street in front of a cinema where Revenge of the Jedi is played.
    • This goes Up to Eleven by the ending, where it's shown there is an infinite amount of different dimensions, each of them being linked by the fact of having a man (Booker, Jack), a lighthouse and a city (Rapture, Columbia).
    • One of the Elizabeths in the ending is the beta model used in the early gameplay demos. This means that all of the Dummied Out content like Saltonstall and the incidents like saving the mailman from the Vox Populi could be a sort of quasi-canon, taking place in alternate versions of Columbia with alternate Bookers.
  • Past a certain point in the game, it is quickly discovered that this is the case in Bravely Default. At the start of Chapter 5, the heroes initially think they're in a "Groundhog Day" Loop, but discount this theory as more and more discrepancies arise thanks to differences in each individual world. The final boss, prior to the final phase of the fight, starts eating other worlds to heal the damage the heroes are doing to him, taunting them that to keep fighting him is to doom entire worlds to extinction... and that's when their alternate selves on every world all attack him at once, weakening him to the point that your group can finish him off!
  • The Capcom heroes reside in Capcom World, possibly explaining how there can be so many cameos and crossovers from completely different settings.
  • City of Heroes has Portal Corp., a company dedicated to exploring other dimensions. There are several individual missions and arcs where you get to deal with hostile other-dimensional entities, either after they've entered Paragon or at their source. The current state of the City of Adventure can be traced back to a massive invasion from Another Dimension.
    • One such alternate dimension, Praetoria, is the focus of the latest expansion, Going Rogue, which fleshes out that dimension beyond Crapsack World Mirror Universe by adding moral complexity and considerably more shades of grey.
  • Eternal Darkness: After beating the game under all 3 ancients you find out that the other ancients (the ones that you beat in the previous two playthroughs) were killed by the main character's counterparts in other, parallel universes. Mantorok then overlaps the three realities, killing all three ancients concurrently and leaving the universe free of them forever.
  • Final Fantasy in general is strongly hinted to take place in a multiverse, with each game (barring a couple exceptions like direct sequels that take place in the same world) taking place in parallel universes. It hasn't been officially confirmed, but every Final Fantasy game has its own version of Cid, Biggs, Wedge, Chocobos, summons (Ifrit, Leviathan, Bahamut, etc), and the worlds they take place in seem to be similar, and yet different at the same time.
    • Though not officially stated, the Rift from Final Fantasy V seems to be a wall separating all the various universes of the Final Fantasy games. Only Gilgamesh has been shown to be able to get around it freely so far. After his banishment there by Exdeath, and his subsequent Heroic Sacrifice against Necrophobe, he sets off on a quest to collect rare weapons, appearing in the worlds of Final Fantasies I (remake), IV, VI (remake), VIII, IX, XII, and XIV. At some point, he also manages to find his way into the conflict between the gods Cosmos and Chaos, and is overjoyed to find Bartz there, having been itching to get a rematch against him. Unfortunately, Bartz has only the faintest of memories of his home world in this continuity, making ol' Gilgamesh an Unknown Rival to him.
    • Hydaelyn, the world of Final Fantasy XIV, seems to be a veritable hotspot for wanderers through the multiverse to wind up; so far we have Gilgamesh (naturally), Ultros and Typhon, Lighting, Shantotto, Brick Golems, Various Yokai, Iroha, and Noctis. For the most part, they have no actual bearing on the plot and may not be canon, but Iroha at least seems to be sticking around instead of returning to her non-existent alternate timeline on Vana'diel, while Gilgamesh, Ultros and Typhon are not part of cross over events and are recurring charcters in side story content.
      • That said, these events often are quasi-canon to the other side of the cross over. Lightning is sent to Hydaelyn to train and in Lightning Returns she can find a Miqo'te's tradional outfit as well as weaponry branded with the seals of the Grand Companies. Noctis's cross over actually begins in his world where a Miqo'te woman, Y'jhimei, travels to Eos and accidentally brings along a group of Ixali who summon the XIV version of Garuda, forcing Noctis and Co. to stop her. At the end of the fight, the XV version of Garuda appears and finishes her off, and in the confusion the two of them disappear. This is where the other side begins and Noctis teams up with the Warrior of Light to defeat the rampaging XV Garuda, before returning home where the new Garuda joins him as one of his summons.
      • The Multiverse actually plays a massive role in the expansion Shadowbringers. The world of Hydaelyn, as players knew it up to this point, is actually The Source, the location of a single whole world before the battle between the summoned gods Hydaelyn and Zodiark split it and its inhabitants into fourteen parallel dimensions, including the Source. Shadowbringers, itself, takes place in the First, one of these parallel dimensions. The region of Norvrandt, where the expansion takes place, is analogous to Eorzea, the primary setting of most of the game's story, and its people are the same as those found in the Source, albeit with the history of the First playing out in a different way from the Source, leading to different names for the races of the First (Elves in the First vs. Elezen in the Source, for example) and even different cultural norms (the Dwarves of the First are considered a beast tribe, even though they are practically the exact same people as the Lalafell of the Source).
    • The Interdimensional Rift from V also makes an appearance in XIV. It is where Omega ends up following its battle with Shinryu. It resides here to perform experiments to determine the ultimate life form and defeat it itself to gain an insight into the innate strength of life. While it's clear that the beings the player faces there (such as Exdeath, Chaos and Kefka) are created by Omega, it's purposely vague about whether said beings are based on real beings from other worlds or based on old myths Omega has encountered (Or both).
    • Even locations seem to have alternate versions as the two Crystal Towers of Final Fantasy III and Final Fantasy XIV show.
  • Fire Emblem:
    • It was thought that the different 'verses all took place on separate worlds (the Akaneia and Jugdral games and Gaiden aside), until Fire Emblem Awakening came along and introduced the concept of the Outrealm Gates linking different worlds together. In fact, it's also implied (particularly in Awakening's "The Future Past" DLC) that the Time Travel present in Awakening's main plot isn't really so much time traveling as much as it is dimension hopping, further implying that every single playthrough of each game is equally canon.
    • Taken even further with Fire Emblem Heroes since the game's setting, the world of Zenith, is not only connected to every single Fire Emblem universe known so far, from Akaneia to Fódlan, but even a version of Tokyo. It also doubles down on the idea of there being infinite timelines. The explanation of why a player can have multiple versions of the same character, not just as different alts of the character, but multiples of the same unit, is because each unit is summoned from an alternate universe.
    • Likewise, the aforementioned Outrealm Gate is implied to be how various characters from the mainline titles get pulled into the world of Fire Emblem Warriors (with the female Corrin apparently having taken a path separate from the three provided in Fire Emblem Fates), while the Original Generation cast of Fire Emblem Cipher would become Canon Immigrants in DLC chapters for Gaiden's remake, Shadows of Valentia. And if that wasn't enough, Fates made it so that, via Canon Welding, Super Smash Bros. also exists as part of the greater Fire Emblem multiverse.
  • I=MGCM uses this as one of its major story and gameplay premises. The enemy demons originate from Demon Realm (a distant home dimension), and they enter the universes through fluxes to eat humans' existences, resulting in the victims being Ret-Gone. These fluxes and portals are created by organisms from Demon Realm and Witches' dimension-hopping effect, which allows the demons to travel into other universes. The fluxes also cause some abnormalities between alternate universes, such as getting teleported into an alternate universe unwillingly, etc. Anyways, the infinite number of parallel worlds and alternate selves already exist before the game starts. Tobio and the heroines also meet their own alternate selves and evil doppelgangers from other alternate universes. A number of demons the heroines fight are slain and corrupted heroines' alternate selves from several parallel worlds, these include ones from the protagonist's party.
  • Injustice 2 features the Multiverse, both as a story element and gameplay feature.
    • In the story, Doctor Fate had saved Black Canary from being killed by the Regime by transporting her into an alternate dimension, where she met and eventually married a version of Green Arrow whose own universe's version of Black Canary had died.
    • The Multiverse is featured as a gameplay mode: presented as Batman's "Brother Eye" surveillance network monitoring dimensional anomalies created in the wake of Batman having summoned an alternate universe's heroes in the previous game. In a similar vein to the Living Towers of Mortal Kombat X, parallel Earths in this game's Multiverse mode change from hour by hour, day by day, and week by week, offering different rewards for saving them. The game's resident Ladder Mode is said to take place in a dimension that is stuck in a Stable Time Loop, justifying its Multiple Endings for each character.
  • According to Word of God, there are at least three timelines in the The Legend of Zelda series, starting in The Legend of Zelda: Ocarina of Time. The Adult Timeline has Link defeating Ganondorf and returning to the past. The Child Timeline begins when Link completes this trip, allowing him to prevent Ganondorf from coming to power. The Fallen Hero timeline was created by an alternate version of Link losing to Ganondorf. Hyrule Warriors features a fourth timeline, where Cia opens portals to the other timelines.
  • Makai Kingdom introduced the multiverse concept for the various netherworlds and non-netherworlds introduced by prior Nippon Ichi games (prime amongst them Disgaea).
  • Mario & Luigi: Paper Jam reveals that the Paper Mario games take place in an alternate universe from the Mario and Luigi games/the rest of the Mario franchise, accessible through a book in Peach's Castle.
  • The Myst franchise is concerned with "the Art," a way of Rewriting Reality that uses Linking Books to explore other worlds, called Ages. Once a Linking Book to a given Age is established, you can only make careful modifications to its text — change too much, and the link will take you to a similar but different Age whose natives won't recognize you, assuming the whole place doesn't collapse from the contradictions you introduced. The D'ni thought of the Art as exploring a "great tree of possibilities," sort of like a multiversal search engine where describing something in sufficient detail allows you to reach it, but some D'ni let this power go to their heads and insisted that they were creating worlds and set themselves up as gods over their Ages' indigenous peoples.
  • One of the largest Multi-User Dungeons in existence, with thousands of pages of content spanning 20 years, The Multiverse , takes place in a Multiversal setting which inspires much of the content.
  • The Nameless Mod mentions that other forum cities exist, and that travel between them is possible. Apparently a Planet Diablo merchant is responsible for the mana potions (that can only be used by a single unique weapon of plot importance) being in the game.
  • Neptunia has so far taken place in several alternate dimensions in the mainline games: The retgone'd first game's dimension, the current canon "Hyperdimension" used in Hyperdimension Neptunia mk2, Victory, and Megadimension Neptunia VII, the Ultradimension featured in Victory, and finally the two new dimensions featured in V II called the Zero and Heart Dimensions for a total of five. And that's not even getting to the three remakes, the soon-to-be six spinoffs, the manga, and the anime.
  • The Nicktoons Unite! series. The world of every Nicktoon show is actually a dimension in the Nicktoon multiverse.
  • Pokémon:
    • Pokémon Omega Ruby and Alpha Sapphire confirms in the Delta Episode that, at the very least, the mainline games exist within their own multiverse. This game specifically has Zinnia discuss two different realities: their own timeline and one where Mega Evolution was never discovered (as a result of AZ's ultimate weapon not firing three millennia prior), which is the universe where the original Pokémon games up to Black 2 and White 2 take place.
    • Pokémon Sun and Moon goes a step further in its own post-game subplot. Salon Maiden Anabel from Emerald appears in an extensive role, only it's heavily implied to be the original timeline incarnation of said character. They're established to be a "Faller," a person who has inadvertently traveled through an Ultra Wormhole due to emitting a strange energy that attracts Ultra Beasts, extradimensional Pokémon hailing from Ultra Space, coming out the other side now stuck in this new dimension and with few memories of their previous life. While not through the same exact methods, a number of characters in following games (including the player character themselves) also end up having their own amensia-inducing trips through space-time that gets them stranded in other universes or time periods.
    • Pokémon Ultra Sun and Ultra Moon established the infinite multiverse by having its post-game revolve around Team Rainbow Rocket, a Legion of Doom of every previous antagonist in the series and led by Giovanni, with said villains hailing from alternate worlds where the Big Bads won due to their respective player characters not even existing to oppose them.
  • In the Perpetual Testing Initiative DLC for Portal 2, this is the Excuse Plot. Since Aperture Science is bankrupt, all test chamber construction has been outsourced to Apertures in other universes, which is then tested in and stolen back. The DLC comes with new Cave Johnson audio that gives us such gems as Space Prison Warden!Cave, Dark!Cave, and Hobo!Cave.
    • As well as a universe filled up entirely with money. Two of them, in fact.
  • In Ratchet & Clank Future: Tools of Destruction, the all-knowing (for the most part), IRIS Supercomputer mentions that existence is divided into infinite dimensions.
  • Shin Megami Tensei III: Nocturne seems to imply that the various Shin Megami Tensei continuities are all connected through the Amala Universe. Raidou Kuzunoha vs. The Soulless Army and Raidou Kuzunoha vs. King Abaddon show the existence of the Akarana Corridor, a tunnel linking several times and realities, further confirmed in Soul Hackers. The Yamato Perpetual Reactor in Shin Megami Tensei IV links at least three parallel worlds (Firmament Tokyo, Blasted Tokyo, Infernal Tokyo) together through the Reactor Room in Camp Ichigaya.
  • The multiverse is a key point to Suikoden Tierkreis, though the player/lead PC only technically ever gets to see one (the reason why is also a plot point).
  • Super Paper Mario has this as the plot. Seeing as an Omnicidal Maniac is walking about with a dark book has the future written in it with the way how to end all of existence, Mario ends at a interdimensional crossroads to collect the Pure Hearts.
  • This trope is a major plot point in Super Robot Wars: Original Generation, with the revelation that the character Gilliam Yeagar is the same character from Hero Senki: Project Olympus, having made his way into multiple Alternate Universes to get back to the world of Elpis in Hero Senki, following its events there. The Big Bad in Original Generation Gaiden is implied to be the same Big Bad of The Great Battle series, as well as the creator of Duminuss, the Big Bad of Super Robot Wars Reversal.
  • Touhou Project involves quite a bit of world-hopping. Based upon a relatively Buddhist notion of the universe, like the Nippon Ichi example above, with multiple hells (Jigoku) and netherworlds (Makai), it gives the heroines plenty of reason to go To Hell and Back. This seems to have been more frequent earlier on in the series, when there weren't as many characters, and Gensokyo wasn't as fleshed out. Gensokyo itself seems to be a semi-self-contained world kept vaguely apart from the real/outside world by the Great Hakurei Barrier, in spite of being physically built in Japan. Alternate worlds the heroines may visit include:
    • In the original game, Highly Responsive To Prayers, Reimu has to close an open portal to Jigoku / Hell.
    • Phantasmagoria of Dim.Dream features "scientists" who visit Gensokyo from an alternate dimension in order to "study danmaku" using a "probability hyperdrive vessel".
    • Lotus Land Story has Reimu and Marisa competing to fight their way into the world of dreams, where Kazami Yuuka resides. Reimu and Marisa also visit another dimension that isn't very well explained in the extra stage, just to beat up the creators for no reason at all.
    • Mystic Square features the heroine of the player's choosing invading Makai, the world of demons.
    • Perfect Cherry Blossom features the Netherworld, and Hakugyokuro, land of restless spirits, and effective equivalent of Purgatory. It also has the legendary lost land of Mayohiga, home of the Yakumos.
      • Yukari Yakumo, a Reality Warper, deserves special mention, as her power of "Borders" allows her to generate portals to any other location or dimension she can conceive of. She can even seemingly create new dimensions, by manipulating the boundary between fantasy and reality, and so make a dream or thought into a real dimension, and then open a portal to it. Needless to say, this makes her a Physical God for all intents and purposes.
    • Imperishable Night has... the Moon. Turns out, there's an extremely different world underneath all that barrenness — a highly advanced civilization hiding itself from the "impurities" of the Earth. Revisiting the Moon also becomes the objective in Silent Sinner in Blue.
    • Phantasmagoria of Flower View has the Sanzu no Kawa, a mythical, River Styx-like river that separates the land of the living from Higan, the land where the dead wait for their judgment, and, as a result, can wind up in Heaven, Hell, or get reincarnated.
    • Subterranean Animism has the Hell of Blazing Fires lying in the cave networks beneath Gensokyo and the Earth in general, presumably in some sort of vague pocket dimension in the Earth's mantle that only appears in Gensokyo version Earth.
    • Undefined Fantastic Object has Makai (although some debate as to whether it is the same Makai from before, there's some evidence that it is.) Byakuren was sealed within Makai for trying to unite humans and youkai (and getting hordes of racists on her ass), but is released thanks to the result of her followers' actions.
    • Wily Beast and Weakest Creature has Hell (the one accessible via Higan) and the Animal Realm.
    • Fangame Touhou Lost Word has this as its premise. The characters travel between universes to prevent them from collapsing.

    Visual Novels 
  • The Nasuverse is actually made of different continuities, possibly because the main works are multi-route visual novels. However, actually traversing between Universes is the domain of Magic (i.e. a miracle) so only a very few characters can actually do it.
    • Also used as a source of infinite Mana by taking a small amount from an infinite number of alternate realities, using a tool designed by the aforementioned character. Incidentally, this is also a perpetual motion machine since it powers itself.
  • The Shinza Bansho Series didn't originally start as one, but thanks to the 4th Heaven, Mercurius, and his Eternal Recurrence it caused the whole universe to start and diverge. According to the series lore, for a multiverse to be possible a great deal of personal freedom is required as other universes exists as other possibilities. As Mercurius wanted to experience every possibility there is, it allowed for the birth of a multiverse in a verse where the laws of fate and gods is king.
  • When They Cry uses and abuses this concept for its Groundhog Day Loops. The multiverse can be viewed only in the sea of kakera/pieces/fragments. In that sea, each fragment is essentially one possible path that the world can take. Umineko: When They Cry introduces the idea of voyager witches, such as Bernkastel and Lambdadelta, who are the only beings capable of traveling the different fragments, and creator witches, who are the only ones capable of creating new fragments.

    Web Animation 
  • In Homestar Runner, there are a lot of alternate universes. Just to name a few...
    Peasant Universe
    Teenage Universe
    Retro Video Game Universe
    Sweet Cupping Cakes Universe
    Storybook World
    • In one Strong Bad Email, The Cheat builds an alternate universe portal that sends Strong Bad to several of the alternate universes (in other words, a flurry of in-jokes).
    • In the fifth episode of Strong Bad's Cool Game for Attractive People, Trogdor manages to escape from the video game universe into Free Country, USA.

  • All Over The House is linked to The Life of Nob T. Mouse via portals and random dimensional jumps. As a result, there are in-universe examples of crossover media, such as The Blobland Gang stories, which Tesrin of All over the house read as a child. These are based on Hubert Schlongson's visits to Blob City, which is the main setting of The Life of Nob T. Mouse.
  • Awful Hospital: Reality outside our observable universe is partitioned into a multitude of practically endless realms known as the Perception Range, each "zone" constituting its own self-contained universe remarkably similar to ours with a unique set of rules and logic, operating differently for every being within them.
  • Bob and George has a lot of different universes, most of them with completely crazy versions of the characters. (One universe is the universe of the original Japanese Rockman games.)
  • Various characters in Deviant Universe have appeared from alternate universes, and one story arc involved an attack by another universe.
  • Dragon Ball Multiverse: An alien race discovers inter-universal travel and gathers the best fighters from every universe to compete in the ultimate tournament. Some of these fighters include a Vegetto that remained fused, a Cell that defeated the Z-Warriors and a Kakarot that didn't lose his memory. The opening few comics imply that the Multiverse is infinite and that the numbers assigned to the various realities are for the sake of the tournament alone. DBZ:M actually goes against tradition by having the "canon" universe receive a moniker other than "One" or "Prime".
  • Dragon City: Erin finds out that her friend Natasha is the alternate universe version of herself, but with brown scales instead of blue. She was temporarily stuck, but when she got back, she found out that she had been declared dead, so spends most of her time in the main universe.
  • El Goonish Shive has a multiverse of worlds sharing many of the same characters. Among them is the main EGS-verse, the Alpha Dimension (where Tedd is a misunderstood Evil Overlord type with a cybernetic hand), the Beta Dimension (where Elliot was born female and Tedd wears square glasses), the Second Life universe (aliens got involved in the American Revolutionary War, Elliot was born as Ellen and went to school with Kaoli), and the less-canon AF04 (April Fools 2004) universe (Tedd was born female, Sara is a goth, and Susan's dad never cheated on his wife). And oddly, Tedd is in every universe, something that nobody else can claim.
  • The Far Side of Utopia has referenced the fact that there are multiple dimensions involved — one organization is called "Interdimensional Security" and travel between the dimensions seems regulated or illegal.
  • Homestuck has a multiversal setting, with the kids' universe and the trolls' universe playing a major role in the plot. It's later revealed that Sburb actually creates new universes that the players can then travel to, in the form of Genesis Frogs that hold universes within their bodies. Our home universe is the product of the trolls' session. Even later, it's revealed that Sburb actually creates multiverses; every possible alternate universe of a base template is encompassed in one Genesis Frog. The structure of the multiverse is also given description: the game sessions occur in stable bubbles within the Furthest Ring, an Eldritch Location which possess neither linear time nor linear space; in its "center" is the Green Sun. At the center of each completed session is a Genesis Frog. The sum of all the sessions of Sburb, Genesis Frog multiverses, the Furthest Ring, and the Green Sun is known as Paradox Space.
  • Jix: Lauren was sent to an alternate dimension where Jix's other personality, Remula, rules Earth.
  • The KA Mics is a multiverse and even has a company that allows travel between alternate universes.
  • Kill Six Billion Demons: Once, there were 777,777 gods. They each built a universe of their own and populated it with their creations. Then they died. The universes they left behind are connected through Throne (or "Heaven" to the layman) through a Portal Network built by mortals who planeswalked into Throne and colonized it after the gods had died. Protagonist Allison arrives in Throne by accident, and is informed that saying you hail from 'Earth' doesn't help in finding her way home because there are over 300,000 known 'Earths', and presumably many more exist that haven't been connected to Throne yet (as is the case with Allison's).
  • The Life of Nob T. Mouse contains a multiverse of sorts through its Quantum History literary device, where each point in time is a parallel universe that may or may not be attached to any other point in time. Although originally devised as an excuse to get around continuity errors, it allows multiple versions of the main characters to exist at once and have different adventures at the same time.
  • Parallels: Keeping the spaceways safe one universe at a time.
  • Scenes From a Multiverse, a comic about life in an ordinary multiverse.
  • Sluggy Freelance has introduced over a dozen alternate universes by this point, ranging from slightly tweaked versions of the main universe to an endless void outside time to Hell itself.
  • Ultima Java has an interesting example; there are many alternate universes, but each universe has a corridor connecting different worlds within that universe. So, in effect, universes within universes.
  • The Walkyverse has several, but most specifically: the Dargonverse, where Jason's Father's Organization was before it came to the Walkyverse; the NoWalkyverse, where Walky went to college and never joined SEMME; the Dumbiverse, where all of the Walkyverse characters went to the same college and SEMME and aliens don't exist (named for the comic revolving around it, Dumbing of Age), and the Fans! universe, which is...well...yeah. There's also one where Sal and Danny ended up together and had a kid, and a few others that have gone unnamed.

    Web Original 
  • Despite being titled Arcana Magi Universe, the series is a multiverse of five unique worlds, each named after The Four Gods.
  • Dominion And Duchy is explicitly described as taking place in a multiverse. Which is at the centre of multiple multiverses held together by something called the Framework of Reality. The universe the story takes place in holds the object that all the different multiverses orbit around. It also implies that there is trade, as in the epilogue, a huge corporation makes a "Dimensional Elevator".
  • Really, what would The Multiverse be like without Jenny Everywhere? Who, for the uninitiated, exists throughout it and can travel around in it at will.
  • Little Lenny Penguin And The Great Red Flood references a multiverse frequently. Word of God says that this multiverse is "anywhere where space and time exists", which is 99% of pretty much everywhere, broadening the concept to disturbingly confusing new heights.
  • A staple of LiveJournal comms like Sages of Chaos, Dear Multiverse, The Lunatic Cafe, and Dear Mun.
  • Protectors of the Plot Continuum treat every fictional continuity and canon as its own universe within a multiverse. There are several such multiverses, many being alternates of the one the PPC looks over.
  • The Wanderer's Library is a massive library containing knowledge from millions of different universes, with portals called Ways that lead to other worlds. It's essential the linchpin of the SCP Foundation universe.
  • Worm has a multiverse which plays heavily into the story. Early on it is mentioned casually that contact with another Earth had occurred and it seems largely unimportant (only communication is possible, not travel). However in the second half of the story the alternate universes come front and center as a portal to another Earth is created, it is revealed that many superpowers tap into alternate universes to function... oh and superpowers come from multidimensional beings who exist across multiple parallel universes at once. The sequel Ward features the multiverse throughout, as the events of Worm led to contact, travel and trade across over a dozen different Earths being initiated.
  • Pact takes place in the same multiverse. While there is no overlap between the two as far as the events of the story are concerned, both settings would have been destroyed if Scion/Zion and Eden had been able to enact their original plan.
  • An Examination Of Extra Universal Systems Of Government is a Mockumentary of a scholar traveling through various universes, studying the different and unique forms of governments found in them.

    Web Videos 
  • The Atop the Fourth Wall / The Spoony Experiment amalgam seems to have this property, most easily accessed by forcing someone to review some part of the Ultimate Warrior series of comics, which are so awful they break reality. In the course of both sets of reviews, Linkara and Dr. Insano flash through a long series of alternate universes, depicted as female/hippy/plushie/reversed versions of themselves/bad actors/etc. Dr. Linksano purposefully uses this to gather an army of Insanos — and it works. Unfortunately they all start fighting each other afterwards.

    Western Animation 
  • The season 4 finale of Adventure Time: The Lich opens the portal using the Enchiridion. The multiverse is a series of alternate planes that can be traveled to with portals torn open by objects of power or opened naturally when they eclipse. In the center is the Time Room where The Omnipotent lives whose Time wave emissions allow the flow of timelines for them all.
    • And the Uncle Grandpa / Steven Universe crossover has Mr. Gus stating he is aware of all of the magical denizens of the multiverse. When Uncle Grandpa leaves at the end, he pulls out a checklist of other Cartoon Network shows he's visited, presumably elsewhere in the multiverse. Also on the list are some Hanna-Barbera / TBS characters- the SWAT Kats.
  • A Ben 10: Omniverse story arc had a group of evil Bens attempt to eradicate all other Omnitrix users in the multiverse. The series finale (and, in turn, original continuity of the franchise) even ends with Ben creating a new universe.
  • Video Land in Captain N: The Game Master is basically a universe for each video game plus the Real World.
  • Family Guy, "Road to the Multiverse". Another Brian and Stewie Road Trip episode, this time going through a Sliders-inspired adventure. Some universes were an Alternate History (where Japanese never surrendered in WWII, the Cuban missile crisis, etc.), while others were the characters done in different art styles (the Disney universe, Robot Chicken universe, political cartoon universe, blocky universe, etc.). There was even a short trip to the real world.
  • Futurama did this, and we discover a world where coin flips always have the opposite results — as a result, Leela and Fry are married, Bender is gold-plated instead of his usual color ("Bite my glorious golden ass!"), etc. As it turns out, both universes are stored in a box inside the other one.
    • They later visit dozens of other universes — ones where they're all robots, or hippies, or Romans...
    • Also, in an earlier episode of Futurama, there was another universe from across the edge of the universe — where the Planet Express crew saw their counterparts dressed as cowboys. Fry asks if there is an infinite number of parallel universes and Professor Farnsworth says "No, just the one."
      • Word of God claims in the DVD Commentary that the cowboy one was a parallel universe (thus they're always the same distance from but never accessible to each other), the others are perpendicular universes (which means they're accessible to each other but only for a limited amount of time).
  • In Gravity Falls, it's eventually revealed an interdimensional portal that connects to the multiverse (the main characters' home dimension is referred to as "Dimension Forty-six-apostrophe-backslash" in "Dungeons, Dungeons and More Dungeons") is hidden in the basement of the Mystery Shack. It was originally built by the Author of the journals, who was tricked into building it by Bill Cipher and was accidentally sucked into the portal himself thirty years before the events of the series. Gravity Falls: Journal 3 details some of the alternative worlds the Author visited, including a few alternative versions of Earth.
  • Justice League: Crisis on Two Earths takes a serious look at this trope to the point of near-deconstruction: The main antagonist, Owlman, goes completely Nietzsche Wannabe over the realization that the multiverse consists of the sum of all universes made from all possible outcomes of every single choice ever made by any sentient being (let's just be generous and say 'infinity'). Anything done is by definition meaningless because an infinite amount of universes exist that contain all possible outcomes of everything. Naturally, his conclusion is to perform the one action that would, by definition, have any purpose at all because it cannot have a different outcome: Blow it all up!
    • This was also alluded to in the series Justice League. The main timeline exists on its own, and any changes to the past (as seen in both "The Savage Time" and "Hereafter") will affect the future itself as opposed to branching off — the Bad Future of both respective stories is completely erased after someone Set Right What Once Went Wrong. That said, there are implied to be multiple universes which diverge off the regular one seen — "A Better World" showed a For Want of a Nail wherein Lex Luthor became President of the United States, had the Flash executed and nearly started World War III. This led to Superman killing him, and caused the Justice League to reinvent themselves as a group called the Justice Lords, with a Knight Templar policy towards peace and security. In addition, the above-mentioned "Crisis On Two Earths" was originally written for the DCAU. Although reinvented as a more general tale, it's fair to say that some version of that movie's events did happen in between JL and JLU (albeit with John Stewart as the serving Green Lantern, among other aesthetic differences), meaning that its own multiversal concept would apply here as well (if unexplored).
  • The Midnight Gospel has its premise centered on this, being about a podcaster who runs a multiverse server farm in order to interview beings living in other worlds, many of which are on the brink of destruction.
  • Rick and Morty: The entire plot is about Rick and Morty traveling across a lot of different and bizarre Alternate Universes.
    • In an episode where Rick opens up several different portals with his portal gun, we see a mug with a question mark on it, a pen, and a notepad come out of one of them. These are implied to be the same ones that Stan had pulled away from him through the portal from Gravity Falls. The creators of the shows are friends, so this was intentional.
  • The end of Spider-Man: The Animated Series featured a team-up of several Spider-Men to prevent Spider-Carnage from destroying a multiverse. One of them didn't have any powers and was really an actor playing Spider-Man in a movie. His universe was strongly implied to be "ours".
  • Star vs. the Forces of Evil: Star boasts she's "a magical princess from another dimension" in the series premiere, and her adventures with Marco occasionally take the two of them and their friends to other dimensions. The most common form of travel between dimensions is apparently "dimensional scissors", which are forged by Hekapoo of the Magic High Commission and given to those she feels worthy. Some people, like Tom and eventually Star, can make interdimensional portals under their own power. The only other way known is though the Realm of Magic, which has permanent passageways connecting Earth and Mewni at the very least.
  • Teenage Mutant Ninja Turtles (2003):
    • The TV movie Turtles Forever establishes that every single version of the Teenage Mutant Ninja Turtles (i.e. every single comic, TV, and film series) all exist simultaneously as separate universes in a multiverse. The Shredder gets rather pissed when he discovers that there are teams of Turtles in each one.
    • The Battle Nexus fighting tournament draws in combatants from all over a multiverse that appears to be a sort of different multiverse concept. Usagi Yojimbo's world is one of them. The Turtles are later scattered across the multiverse by Drago: Donny and Mikey end up in worlds with turtles (a Bad Future and a superhero reality), but Raph and Leo end up in totally different places.
  • Steven Universe, OK K.O.! Let's Be Heroes, and Craig of the Creek. All the shows take place in a fictional depiction of Maryland (or "Delmarva", as its referred to in Steven Universe), but on different levels of reality. Word of God states that OK KO is a video game series within the universes of the other two shows, while Craig is the "real world" that additionally has Steven and every other Cartoon Network series as television shows.

    Real Life 
  • Theories regarding a "multiverse" are popular with many scientists, particularly those who act as ambassadors with the general public. Many or infinite universes could help explain some features of our universe that are otherwise difficult to explain (e.g. it handily solves the "fine-tuning" problem: the unbelievably low probability that a universe with fundamental constants permitting the emergence of intelligent life would appear purely by chance. If an infinitely diverse multiverse exists, then it is not improbable at all: from an infinite set of dice rolls such a universe must necessarily appear, and only in those parts of reality where conditions are right would life arise to contemplate the question in the first place.) One could get the impression that the multiverse is a generally accepted scientific theory. In fact, it is highly contested, with some disputing that it even counts as "science." So far, no one has proposed any way to test for its existence, or make any falsifiable predictions using it, and such things might even be impossible. In an infinitely diverse multiverse, anything that can happen will happen. Therefore any observation can be accounted for in a multiverse theory which, by definition, predicts anything and everything - rendering it unfalsifiable and scientifically useless. While it sounds more scientific, objectively speaking there is no more reason to believe in an infinitely large and diverse multiverse than in a creator diety, or that reality is a simulation run by aliens. Therefore it is not science. It is merely an idea, or as cosmologist Paul Davies wrote: theology dressed up as science. Cosmologist George Ellis wrote, "Nothing is wrong with scientifically based philosophical speculation, which is what multiverse proposals are. But we should name it for what it is."


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Alternative Title(s): Multiverse


Different Japans

The Four Heroes all quickly discover that they each come from a parallel universe.

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Main / TheMultiverse

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