Earth All Along



"The only danger [of space travel] is if they send us to that terrible Planet of the Apes. Wait a minute... Statue of Liberty... that was our planet!!"

- Homer Simpson, The Simpsons.

At some point of a Speculative Fiction story (often the end), the apparently alien setting turns out to be none other than Earth, warped and twisted by disaster, disease, the passage of time, or some other instrument of drastic change.

Almost invariably this involves a character who was sure he was anywhere but Earth discovering the Awful Truth.

At some point, this actually was very shocking (partially because humanity was very close to blowing itself up in the 1960s) and is one of the most famous kinds of Twist Ending. Through over-use, these days, it's become The Untwist; it would usually be more surprising if the apocalyptic planet turned out to be anywhere but Earth.

Variations:
 * A classic Twilight Zone twist: the characters in the story turn out to be Human Aliens. They're stranded on a primitive planet and now have to colonize. On resigning themselves to their fate, the leader says, "And I shall call this planet 'Earth'." Double points if his name is Adam. (The original Twilight Zone actually used this plot in "Probe 7--Over and Out".)
 * The preferred Outer Limits version: the peaceful folks living in fear of alien invasion are really humanoid aliens. The aggressors? Humans. This variation also a classic Twilight Zone episode -- "The Invaders".
 * Instead of believing it to be a different place, believe it to be a different time. You believe you're in caveman days, but later realize you're in the future After the End, or you believe you're in the future, but later realize you're in the past during an enlightened period that will later get destroyed (with all record of it also wiped out).

As you might expect, this is an , so there are many spoilers below. However, once you've read the description above, most Earths All Along are self-spoiling anyhow.

Related to Humans Through Alien Eyes and Tomato Surprise.

Caution: There will be spoilers!!

Anime and Manga

 * In Combat Mecha Xabungle, the low-tech worker-caste "Civilians" scrape out a hard-scrabble existence on a desert world, believing themselves to be descended from Terran colonists; over the course of the series, the planet is revealed to be (of course) Earth, stretched to the very end of its ecological rope. The 'colony' story was spread by the high-tech ruling-caste "Innocents"
 * In Eureka Seven, it turns out that the planet everyone escaped to to get away from the aliens invading Earth is actually Earth itself, transformed by the scub coral into a mostly-unrecognizable shape.
 * There are sufficient hints at the end of Mai-Otome to make the viewer at least wonder if the apparent colony world is in fact a far-future and much-changed Earth.
 * Super Dimension Fortress Macross: Love, Do You Remember?, when Hikaru and Misa find out that the planet they were transported to is Earth after a Zentradi attack.
 * Clow Country in Tsubasa Reservoir Chronicle is the Tokyo from the Tokyo/X arc, just at a different point in time. This also counts as Nice Job Breaking It, Hero since the protagonists were at least partially responsible for what happened to it.
 * Parodied in Keroro Gunso: Giroro and Natsuki get warped into a Desert of the Real by accident, and while searching for signs of civilisation, find it in the form of a familiar landmark in the series, the NPG Radio Tower - in ruins.
 * Yasuhiro Yoshiura's Pale Cocoon inverts this.
 * Psyren, Volume 01 Chapter 005/006: The strange unnatural world that Ageha finds after being transported by a magical telephone call (no, really) is none other than a devastated Japan, as revealed by the crater-scarred face of Mt. Fuji.
 * Vandread the robotic aliens that pest the protagonists for most of the story turn out to be drones sent from Earth to.
 * Inverted in Solty Rei, where the people were made to believe that they were on Earth after a major disaster, but turn out to be colonists on another planet.
 * The last few episodes of Brigadoon Marin and Melan indicate that Brigadoon, which had appeared to be a different world, is Earth in the distant future.

Comic Books

 * In a bizarre case of this trope (it was not the end of the series, but Cliff Hanger revelation for the issue), the Archie Comics Sonic the Hedgehog series had Mobius revealed to be Earth far into the future, after an attempt by Cthulhu-like aliens to wipe out humanity for crimes against them. This was done to make the comic fall in line with its video game brethren, which had Sonic and company on Earth from the get-go. Some fans were not amused.
 * In the Doctor Who Magazine comic The Glorious Dead, the Doctor discovers that the planet Dhakan is in fact Earth with an altered history, after the discovery of St Paul's Cathedral.

Film

 * The original 1968 film version of Planet of the Apes, where the revelation that protagonist George Taylor is back home comes when he comes across the ruins of the Statue of Liberty, which acts as The Constant. (The 2001 remake, while treading the same ground, uses a quite different ending based on that of the original French SF novel.)
 * World Without End, the first sci-fi movie filmed in Technicolor CinemaScope, told the story of a group of astronauts on a mission to who crash land on an unknown, Earth-like planet. They know it can't be Earth because there are no radio signals and the radiation count is too high. They learn the truth about the planet when they encounter a graveyard.
 * In an interview, the film's director Ed Bernds said, "If anybody could sue anybody, I could sue Rod Serling for Planet of the Apes, because they definitely used my ideas about space travel and time travel in making that picture."
 * In The Film of the Book Logan's Run, Logan and Jessica make it to the surface only to find the ruins of Washington, D.C.
 * In the book, it was made very clear where they were to begin with—Washington was not in ruins; it was not After the End, but just in a Brave New World-like pleasure culture. This is why they wind up safe not on Earth but on a space station orbiting Mars.
 * Shua spends much of Sky Blue talking about how great Gibraltar will be, and how he'll go there after the fall of Ecoban. Guess where Ecoban is.
 * Star Trek the Motion Picture has a variation.
 * The Czech science fiction film Ikarie XB-1 (released in the US as Voyage to the End of the Universe) actually gained one of these through Cut and Paste Translation; in the original film, the characters were human astronauts seeking "The Green Planet"; the Americanized version of the film added, changing the ending from  to Earth All Along.
 * Parodied in the mockumentary The Independent starring Jerry Stiller: one of the films Morty Fineman creates is entitled What Planet is This (Oh My God it's Earth).

Literature

 * The Homeward Bounders is a slight subversion: instead of planets, you get Homes. Still an absolutely unexpected Tear Jerker.
 * The short story The Hunters has an invasion by ferocious aliens who destroy the civilization of the planet. At the end it is revealed that the invaders are humans.
 * The Nitrogen Fix by Hal Clement kicks this up a notch by making Earth actively uninhabitable to human beings (as in, survival domes and oxygen masks), and introducing an alien race that thrives in the new environment.
 * In Grant Naylor's Red Dwarf novels (not the TV series), Lister is trapped on Garbage World, where humanity has dumped centuries' worth of its waste, for 30+ years. Early on, he finds the oil- and acid-rain-soaked, but still recognisable, shape of Mount Rushmore with its five presidents' heads (don't ask).
 * In Andre Norton's Star Rangers (alternate title The Last Planet), a decrepit patrol ship from a decaying human-dominated galactic empire finally breaks down for good far from the galactic core and its civilizations. The faraway fringe world on which our heroes are stranded seems almost too perfect to the human crew members, though...
 * An odd variation in H. Beam Piper’s Lord Kalvan of Otherwhen. Hero Calvin Morrison assumes that he’s been thrust forward in time to a post-apocalyptic Earth, until he sees the outline of a familiar mountain range, and realizes it shows no sign of strip-mining. Since the amount of erosion necessary to eliminate the evidence of man’s work would also make the mountain’s silhouette unrecognizable, this makes him realize that he must be in a parallel universe instead.
 * Gary Paulsen's SF novel The Transall Saga.
 * In Michael Marshall Smith's typically Mind Screwy debut novel, Only Forward, The City was mistaken by the protagonist for a parallel dimension but turns out to be a future Earth. The Constant here is Nelson's Column.
 * Ea of David Zindell's Ea Cycle turns out to be Earth millions of years into the future.
 * A variation: Larry Niven's A World Out Of Time has a relativistic spaceship pilot trying to return to Earth millions of years after he set out, and since and his computer has gone crazy, he can't tell whether it's Earth or not. And since the launching system he needs to get back up to ramscoop speed is long gone, he has to figure out which is true before he stops—because once he does, he can't go anywhere ever again.
 * Another Larry Niven example comes from his "Draco Tavern" stories: the chirpsithtra remember a civilisation they met millions of years ago, whose planet was undergoing geological upheaval, and a green blight was taking over the oceans, converting much of their atmosphere into oxygen. This killed them off in the end, but created the conditions necessary for us and (almost) everything else we know.
 * In J.R.R. Tolkien's unfinished story The Notion Club Papers, a man learns to astrally project himself and so visit distant alien planets. After describing several of them, he then came across a world where he watched what looked like a teeming anthill spread disgustingly across verdant countryside. He then realised it was Earth All Along, and he was watching a sped-up history of his own hometown of Oxford.
 * In The Inverted World, the city which is apparently Trapped in Another World turns out to have been on Earth all along.
 * The Search For Wondla,
 * In Christian Cantrell's "Containment", the protagonist lives in a colony on Venus, and is trying to solve various environmental problems
 * In The City of Ember, the city turns out to be underground on Earth. Human beings lived there for centuries; the idea was to protect them from nuclear war, but they lost the evacuation instructions years ago, and no one was around to tell them that the apocalypse was over and they could all go home now.
 * "Doctor Who And The Hell Planet", a short story by Terrence Dicks in which the titular Hell Planet (full of volcanoes and dinos) turns out to be prehistoric Earth. The Completely Useless Encyclopedia acerbically suggests it would have been a much better surprise to reveal it wasn't prehistoric Earth.
 * The Helmsman Saga's first books contained some references and allusions implying it occurs in the very distant future. Then, in Book 8, the protagonist's ship is lost, and his Escape Pod lands on Earth in the 60-s.

Live Action TV

 * The Doctor Who serial The Mysterious Planet did feature the discovery (due to a Tube sign) that the planet the Doctor and Peri were on was actually Earth and it had been shoved half way across the galaxy.
 * Stargate SG-1, "Solitudes": Two members of the team seem to have been shunted to the wrong planet due to an overloaded Stargate. Turns out it's a second Earth gate, buried under the ice in Antarctica. This also serves as a great big Lampshade for the whole Single Biome Planet thing.
 * The Twilight Zone episode I Shot an Arrow Into the Air features 3 astronauts crash landing on what they think is an unknown desert planet. At the end, it is revealed that the "desert planet" is actually.
 * In Outer Limits Revival episode "The Light Brigade", the crew of a stricken ship must launch a Doomsday weapon on an enemy planet in order to save humanity. However, in one of the Cruel Twist Endings the revival series became infamous for,

Music

 * Appears in the Music Video for "Sing For Absolution" by Muse. After flying a spaceship across the galaxy, Matt Bellamy and his crew collide with an asteroid and plunge onto a desolate desert planet. They step out... and find themselves on the ruins of Westminster Bridge, London, with the smoking remains of the Houses of Parliament behind them.
 * A kitschy Leonard Nimoy track called "Visit to a Sad Planet" ends with an unsurprising revelation.

Radio

 * A hybridization of Earth All Along, the Adam and Eve Plot, and an anti-Earth All Along occurs in the '70s BBC Radio Drama Earthsearch: The crew of the colony-ship Challenger tries to return to their home planet, Earth, to find it missing, and finally decides to settle on the new planet Paradise. Paradise is a lot like Earth, but it has saltwater oceans, and a heavily cratered moon. They eventually start referring to the planet as "their" Earth. There are a number of clues and red herrings—the other planets in Earth's solar system have different names, but we're told that the planets were renamed centuries earlier, for example. Just in case you didn't work out the original "Earth" wasn't Earth at all, the sequel begins with a global flood.
 * The Prequel, Earthsearch: Mindwarp takes place in an underground complex thought to be surrounded by rock infinitely in all directions, but when the main characters escape they find themselves on the original "Earth", but this happens early on.
 * The ending of the first season of Douglas Adams' The Hitchhiker's Guide to the Galaxy radio series, as well as The Restaurant at the End of the Universe in its novelization adaptation, features the main characters unexpectedly once more on Earth, with a rather unflattering secret about mankind unveiled in the process.
 * The Big Finish Doctor Who audio drama Terror Firma has the reveal that the setting of the story is a Dalek-conquered Earth.

Tabletop Games

 * The Roleplaying Game Earthdawn has a metagame aspect of this trope: the setting takes place A Long Time Ago on Earth, but there is no time travel, and the inhabitants naturally aren't affected by this. However, the clues were few (with only very small maps available), so most players actually never figured it out.
 * Note, by the way, that the RPG Shadowrun is in contrast one of the most successful RPGs on the market, while being the same universe as Earthdawn, just Twenty Minutes Into the Future rather than a long time ago.
 * If by "very small" you mean "obviously shows Crimea, the Black Sea and the Caucasus" (e.g. a good chunk of southern Russia and Ukraine).

Video Games

 * City of Heroes has a weird version of this: much of the game's plot revolves around an alien invasion from a world in a parallel dimension.
 * The ending of Illusion of Gaia reveals that the game took place on Earth all along, but just the the cause of evolution had been altered by Dark Gaia.
 * In Drakengard 's bonus ending, Caim and his dragon chase the queen beast into another dimension, but that dimension happens to be modern-day Tokyo. It's still an alien dimension to Caim, and this is illustrated by the fact that Tokyo is entirely in black and white.
 * The first Pikmin game suggests this, and the second one confirms it.
 * Just being on this page is a massive spoiler for the following game.

Web Comics

 * This is reversed in Dawn of Time. At first it appears to take place in the past, with the addition of the cavegirl-alongside-dinosaurs Flintstones device. However, as more of the world is shown through the story it's revealed that there are large cities, more advanced technology, and trading routes, showing that the world is more of an alternate universe. It's just Dawn who's incredibly primitive

Western Animation
"''I hate every ape I see From chimpan-A to chimpan-Zee No, you'll never make a monkey out of me!
 * Lampshaded in Futurama: "The next day, Billy's planet was destroyed by aliens. Have you guessed the name of Billy's planet? It was Earth! Don't date robots!"
 * Then turned Up to Eleven in a season seven episode, where, 6,990 years into the future, humans, apes, birds, cows, and a slug-like race have all rose to power, destroyed themselves, and then subsequently conquered the weakened race.
 * In the Justice League episode "Hereafter" Superman wakes on a planet with a red sun after being blasted by Toyman and presumed dead. He makes his way across the wasteland to a jungle area, dealing with strange local creatures along the way. Considering the page I'm writing this on, you can guess what he learns when he meets up with his old 'friend' Vandal Savage.
 * In addition to the Homer quote above, The Simpsons episode "A Fish Called Selma" includes a musical stage version of Planet of the Apes called "Stop the Planet of the Apes, I Want to Get Off". The song that Troy McClure, as Taylor, performs during the final scene literally names the trope in its lyrics:

Oh my God! I was wrong! It was Earth All Along! You've finally made a monkey, (Yes, we finally made a monkey!) Yes, you've finally made a monkey Out of me!'' I love you, Dr. Zaius!"

"Mask: "It was Earth all along, don't you get it?""
 * The punch-line of the first season of Transformers: Beast Wars was that it doubles as both a sequel and prequel to Transformers Generation 1: the primitive planet on which they found themselves was, indeed, Earth all along, millions of years in the past, and the entire series was set during the period of dormancy while the Autobots and Decepticons were unconscious in their crashed ships halfway through the first episode. However, all the characters were from long after the original series, winding up on prehistoric Earth due to time travel. There are some dead giveaways, but enough red herrings to make them look like they aren't dead giveaways. The Reveal is handled nicely, bringing the plot together for second and third seasons with episodes far more connected than those of the first.
 * Particularly well handled considering that Megatron believes it is Earth from the first episode, though Dinobot does not, given the two moons and lack of civilization. Audiences were given conflicting evidence to support either a primitive Earth or an Earth-look-alike until discs came into play.
 * Hell, the writers weren't sure if the planet was going to be Earth or not when they started. Throw in a second moon and if we finally decide this is Earth we'll blow it up.
 * Parodied in The Mask when he and Peggie find themselves on a planet inhabited by pigs. They find the ruins of the Coco Bongo.


 * Made even funnier by the  that they all call the planet   throughout the episode, and the title itself is.

Anime and Manga

 * In Mahou Sensei Negima

Film

 * Pandorum: The audience is led to believe

Literature

 * The Elseworld mini-series/graphic novel Red Son ends with a twist: Krypton is actually a far future Earth, a utopia created by Jor-L's famous ancestor Lex Luthor, who founded it after defeating the Comrade of Steel (see Temporal Paradox).
 * In The Pendragon Adventure's eighth book, The Pilgrims of Rayne, Ibara is revealed to be an island on Veelox a few miles off the shore of Rubic City. 300 years in the future. Upon visiting Rubic City, Bobby finds the place a ghost town, with the Lifelight Pyramids now being tombs, and the only humans around are crazed pirate-like scavengers. It's rather terrifying.
 * Asimov's The Stars Like Dust is a veritable cornucopia of Earth All Along. About half the chapters end with the reader's sudden discovery that the story's location is not what it seemed. Contains examples of "It Was Earth All Along", "It Was The Homeworld All Along", and "After The End".
 * An award-winning Star Trek short story called "Our Million-Year Mission" had an Uber-Enterprise that finds a replica of the Milky Way galaxy devoid of life billions of light-years from where it should be.
 * The 2000AD short story The Last Hurrah of the Platinum Horde, by Alan Moore, has a gang of space age barbarian warriors deciding to leave their home planet and set off in a straight line across the universe raping, pillaging and killing everything in their path. It turns out that the universe is curved, and they end up coming back to their homeworld from the opposite direction and inadvertantly sacking it.
 * The early Arthur C. Clarke short story "Encounter in the Dawn" depicts First Contact between a technologically advanced galaxy-spanning empire and a primitive caveman tribe on a backwater planet. The description of the explorers is pretty much humans in the Standard Sci Fi Setting, however when the survey team is recalled, it is revealed that the cavemen they interacted with would eventually found the city of Babylon.
 * Done in the 1968 novel Captain Future novel "Planets in Peril" by Edmond Hamilton. The protagonist goes to help a human looking race in a dying universe (a short time away from being reborn in a new Big Bang), impersonating an ancient hero of that race. In the end, it is revealed that the universe is actually our own some 20 billion years in the future. What was the ancient hero's name? Kaffr!

Live Action Television

 * The twist ending to the fifth season premiere of Andromeda was that the dystopian Seefra-1 was really Tarn Vedra, the captain's home planet and former seat of the Commonwealth.

Tabletop Games

 * In the Hollow World inside Mystara, sections of doomed surface-world civilizations have been transplanted and preserved by the Immortals. Most such cultures traditionally believed that their patron Immortals actually rebuilt their native worlds to protect them, rather than re-located them en masse; however, the recent arrival of surface-world explorers and traders has proven to many that they'd been moved to the planet's interior.

Video Games

 * Dragon Quest III (Dragon Warrior III in America) had the protagonist fall into the Dark World, where he must defeat the demonlord Zoma. After defeating him, the locals celebrate by giving him the title of Loto (or Erdrick, in American NES versions). This reveals that the "Dark World" is actually Alefgard, the kingdom the first game takes place in (which also appears in the second), and that III was a prequel.
 * Zork Zero, prequel to the seminal Zork text adventures, makes its setting in the timeline fairly clear from the start. The twist comes at the end of the game, when you inadvertently transform the castle in the story into.
 * Jak II; upon discovering the ruins of Samos's house partway through the game, Jak says, "This horrible place... is our world!"

Anime and Manga

 * Gall Force: Eternal Story had a variation where the MacGuffin world being fought over was a terraformed version of Earth's moon. The story ends with the moon left lifeless and two of the cast stranded on a prehistoric Earth.

Comic Books

 * A Silver Age Superman story (which hasn't been in continuity for decades), "A Name Is Born", had two astronauts from other worlds land on prehistoric Krypton, fight, save each other's lives, and get stranded. Naturally, when they took off their helmets, one was male and the other was female—and they were named Kryp and Tonn.

Literature

 * The Hitchhikers Guide to The Galaxy dumps Arthur on a ship transporting Golgafrinchans, Human Aliens who perform useless jobs towards a mass genocide. They land on a beautiful planet, settle it, and set about ruining it with their bureaucratic and stupid ways of performing basic tasks. Arthur realises that the Golgafrinchans were the ancestors of humans, not the ape-like beings native to Earth. However, the book ends with Arthur sitting by a stream, watching the trees burning on the horizon (the Golgafrinchans had adopted the leaf as their currency and were fighting inflation by reducing the supply), feeling glad to be alive.

Film

 * In a popular Mystery Science Theater 3000 episode, Women of the Prehistoric Planet, the captain of the ship leaves his illegitimate daughter Linda behind on said planet with Nature Hero Tang, the son of the survivors of the ship they were trying to rescue. He accepts that they'll be happier together on their new world, then pronounces (in the cheesiest way possible), "The third planet will henceforth be known as... 'Earth'."
 * The Hitchhikers Guide to The Galaxy film ends with the rebuilt Earth coming to life.

Video Games

 * Odin Sphere features the chipper, happy ending of

Anime and Manga

 * An interesting manga variant with an Anvilicious Aesop, delivered by mangaka Rumiko Takahashi in the early 1970's. A time vortex opens up in a classroom and starving primitive peasants spill out. Clues lead the class to assume that these are time-travelers from a historical famine centuries in the past. Since the class had been discussing the world's declining resources, they give huge amounts of food to the starving peasants before sending them home. "Home" turns out to be thirty years in the future - evidentally the people in the past would end up sending so much food through the time portal to help "the past" that they would end up collapsing civilization.
 * Scrapped Princess does this to the viewer, with a small hint that something might not be as it seems being at the beginning of the very first episode, and nothing more said about it until partway through the series. Everyone in the show is seen to be living in a catchall generic Middle Ages fantasy setting, and to the viewer, it looks like just another Slayersesque/Record of Lodoss War type anime based in some nondescript magic world that is kind of like our world, but not.  Then again, the very beginning of the show has a bit of Astronomic Zoom that reveals the setting to be.
 * Sorcerer Hunters does the same thing Scrapped Princess did much less effectively (or more, considering that the above twist was an important part of the story in SP, but in SH, even if you suspected it somehow, it doesn't really matter until the end, and isn't even mentioned until the end). Long story short, in the final battle between Zaha and the Sorcerer Hunters, Zaha prepares a spell to unleash Carrot's power as the God of Destruction. Doing this requires them to be in the world that came before the world that the characters are now in, a world of death and destruction. The characters are transported to  While this sounds kind of cool, trust me it's stupider than it sounds.
 * Turn a Gundam has a variation. The series takes place in a pre-industrial world, which makes it rather shocking when mobile suits show up from the Moon. Partway into the series, it's hinted that some disaster (dubbed the Dark History) is the reason Earth is backwards while the Moon is advanced. The final act of the series is kicked off when we finally see what the Dark History was: all of the Gundam universes made prior to Turn A, including those not helmed by creator Yoshiyuki Tomino, who later said that the series was meant to put all of Gundam into a single timeline (hence the name, "Turn A", from the mathematical symbol meaning "all items in a set").

Comic Books

 * In the alternate-reality Superman comic Red Son, it is revealed that Superman, and Krypton
 * A non-canonical comic based on Star Wars has the Millennium Falcon crash on a distant planet; Han is killed by the natives. Years later, the Falcon's wreck and Han's corpse are discovered by the famous archeologist... Indiana Jones. Who was trying to discover the Sasquatch, previously known as Chewbacca.

Film

 * Fantastic Planet. The planet the Traags were inhabiting is left to the humans - and it becomes Earth.
 * In the Mystery Science Theater 3000-ified film Teenage Caveman, directed by the immortal Roger Corman, the Twist Ending is that it's After the End, and not One Million BC.
 * The movie was based on By the Waters of Babylon—see Literature, below.
 * M. Night Shyamalan's The Village.
 * Women of the Prehistoric Planet, which you may remember from Mystery Science Theater 3000, features the accidental colonisation of Earth as a result from one of the few fictional vehicles ever to take relativity into account.
 * This is the main twist of Yor, the Hunter from the Future, and the film's excuse to include Space Clothes, laser guns, and Mecha-Mooks in the last act.
 * Although the film's American title title kind of gives it away. The original Italian version is titled Il mondo di Yor (The World of Yor), which makes the final act much more of a twist.

Literature

 * Stephen Vincent Benét's short story By the Waters of Babylon (1937) is this trope: the narrator, the son of a priest who is "immune" to a certain kind of metal that can kill everyone else in his tribe, narrates in such a way that you think he is a member of a primitive tribe that may or may not possess magic of some kind. By the end it is clear that
 * The World of The Runestaff by Michael Moorcock, is Earth in a distant future, where all technology is lost.
 * In Alfred Bester's short story Adam and No Eve, an experimental space flight sets off a chain reaction that devastates and sterilized the world, leaving the pilot of the spaceship as the last survivor.
 * A Time Team story from 3-2-1 Contact appears to be set in the distant past, but at the end  the Time Team realizes that they are actually.
 * The Shannara series is seemingly a medieval Fantasy setting with the usual Five Races, but it's revealed pretty early on to be an After the End future.
 * The final book of The Darkangel Trilogy revealed that the setting, a fantastical alien world with month-long days, was Luna, terraformed ages ago. Earth's was incinerated in a global nuclear holocaust, and Luna had a civilization collapse to medieval fantasy levels.

Live Action TV

 * Land of the Lost: Not Earth, but a similar situation; an advanced, civilized Sleestak arrives in the Land of the Lost by Time Travel, only to discover that the primitive Sleestaks aren't from his past, they're from his future, After the End.
 * The planet Omega-IV in the Star Trek the Original Series episode "The Omega Glory" is a bizarre case. The "Yang" and the "Kohm" tribes are all that's left of their civilization after a Cold War turned nuclear, and the resemblance to Earth comes to a head when the tattered, ancient American flag and U.S. Constitution put in appearances that leave the heroes stunned. But it's all the setup for a massive unreveal. While a deleted scene would have suggested that the inhabitants are the human descendants of a Lost Colony, the mysteries are never resolved onscreen and Omega-IV is apparently just an alien planet that coincidentally reinvented America, the Soviet Union, China and the Cold War. (There were at least two other worlds in Original Trek that had cultures identical to Earth—five, if you count the Space Nazis who were explicitly given that information by an Earthman, the Space Gangsters who got it from an Earth book, and the Indians whose ancestors were actually from Earth.)
 * Hammer House of Horror episode "The House That Bled to Death" is about a woman being haunted by visions of brutal murders she believed had happened in the house where she lives. At the end she leaves the house, but it is revealed that the visions were of the future.

Newspaper Comic
"Space-Caveman: Maybe planet older than we thought."
 * BC eventually implied that the strip was set After the End complete with a cache of books from our time including The Bible.
 * In Brewster Rockitt: Spaceguy, the titular character is on a visit to the planet Troglodonia, home of the Space Cavemen. One cave has a mural on its wall that depicts a visual history. It starts with a caveman, progresses through history (a gladiator, a car, etc.) before concluding with a mushroom cloud and another caveman.

Video Games

 * Etrian Odyssey has a fairly typical medieval fantasy swords-and-sorcery setting, with some cryptic intro on the title screen about some disaster long ago that ended the previous age. This is shattered when you reach the fifth stratum in the first game, Lost Shinjuku (as in, this Shinjuku, with the backgrounds looking almost exactly like those pictures and everything.) It turns out that recklessly advancing science and technology brought about global warming and miscellaneous environmental calamities to the point that Earth was an uninhabitable wasteland, killing off almost everyone. The few survivors started something called the Yggdrasil Project to try to restore the environment, eventually leading to the low-population, completely lush greenery-everywhere medieval fantasy-looking world you're used to.
 * Quintet's Heaven And Earth series, which involves Soul Blazer, Illusion of Gaia, and Terranigma. Although the first of those games doesn't explicitly claim to occur on Earth, it's a direct prequel to Illusion of Gaia, which does (the ending reveals that Will's world eventually gave rise to modern civilization.) Terranigma is set long After the End, but the player isn't clued into this until after the end of the first act.
 * Of course, this all depends on you interpretation of the series. Fan theories give rise to every possible scenario from alternate dimensions, Time Travel, to some sort of bizarre "New Game+"-inspired theory that claims that the efforts of all three games lead to "our Earth".
 * Indie-game Oracle of Tao has this lampshaded from the very beginning of the game, along with a second world due to World Sundering. The Playable Epilogue omits the extra section, since the gate to this other world was presumably sealed.
 * Most of the plot in Sigma Star Saga revolves around searching for a series of six planets which will ultimately lead to a Doomsday Device.
 * Squaresoft loved to hint at this trope during their later SNES to early Playstation years. Secret of Mana has a scene late in the game when the heroes find recordings of their world from its And Man Grew Proud days, before the Mana Beast destroyed civilization and brought about the return of magic. The recordings include country music, an episode of Jeopardy, news channel debates on the dangers of mana energy, and then a final broadcast of the Mana Beast attacking a city and then turning on the news crew that's filming the destruction. The implication is that the world of Secret of Mana is really Earth's distant future.
 * Then in Final Fantasy VII, we have an archeological dig that's uncovered what appears the ancient remains of a recognizable, real-world fighter jet. Fans debated the implications of that scene for years, though after the release of Final Fantasy X-2, Word of God has half-jokingly said that, rather than our world, the game actually takes place in Spira's far future.
 * And in Xenogears, the heroes find an underground city near the end of the game that looks like a modern metropolis and, within it, they find ancient newspapers making references to everything from Elvis Presley to the Wimbledon Cup (not to mention that the origins of the Ancient Conspiracy fueling the game's story bears a What Do You Mean Its Not Symbolic resemblance to the book of Genesis). Word of God later stepped in again to say that it's not Earth, but another planet far in Earth's future (though Earth does play an important, if unseen, role in that planet's backstory).
 * Not only that, but the game gives a more subtle hint that it might be our world: The chronology. The game takes place ten thousand years after the first humans began populating the planet. If one assumes Zeboim is modern or near-future Earth (given the technology it is clearly supposed to resemble it), and Zeboim died out 4000 years before the events of the game, then the game would take place circa 6,000 A.D., and the world's genesis story would have taken place circa 4,000 B.C, which is pretty much (23 Oct, 4,004 B.C.) when Bishop James Ussher calculated to be the date God got rolling on creating the world. Word of God may say it's not our world and of course that makes it true, but there are so many coincidences!
 * Using the Perfect Works chronology, Xenogears actually takes place in A.D. 17276-17277.
 * At the end of Scrapland the titular Scrapland is revealed to be the Earth during the Big Bad's As You Know speech.
 * The Konami arcade game Gaiapolis starts out looking like an alternate reality but reveals itself pretty late in the game to be an After the End. The Reveal location? A massive graveyard watched over by mysterious robots.
 * Utawarerumono
 * A pretty big clue comes when you see a strategic map view of the area and
 * After defeating the God King in Infinity Blade and sitting through the credits, the Warrior accidentally triggers a holographic map of the world and its literally shattered moon. At first, the landmasses aren't instantly recognizable, but after a while Australia, Eurasia, and Africa rotate into view.

Western Animation

 * Parodied in the Futurama episode "The Cryonic Woman", where Fry thinks that he is in New New York After the End, but it turns out to be current-time Los Angeles. Fry protests: "But there was this gang of 10-year olds with guns! But everyone is driving around in cars shooting at each other! But the air's green and there's no sign of civilisation whatsoever!" and his friends reply: "That's L. A. for you!"
 * It then descends into satirical social commentary, where Fry cites, as proof that he's in a post-apocalyptic wasteland, the facts that nobody reads, everyone's a phony, and all the food has cilantro in it.
 * Parodied again in "The Late Philip J. Fry", when Fry finds the ruined Statue of Liberty next to an Ape Statue of Liberty, a Bird Statue of Liberty, a Cow Statue of Liberty and a Slug Statue of Liberty.
 * Parodied in Re Boot. In one game, the landscape is that of a desolate wasteland. A single 1-binome walks onto the screen and utters the phrase, "You finally really did it. You maniacs! You BLEW IT UP!"
 * Subtly hinted at in Adventure Time. The Land of Oo appears to be a crazy fantasy world, but the opening credits and occasional references (along with Word of God) implies that it's actually After the End. How all that magic suddenly started working is still anyone's guess.

Other

 * In the Creepypasta "Mutant Future", it turns out that  is actually Earth in the future. In the year 2033, a disaster from a matter-energy transference experiment in Japan causes the annihilation of Japan and the mutation of Japan's wildlife..

Battlestar Galactica (Remake)

 * In the 2000s Battlestar Galactica... Well, it's complicated, but manages to touch pretty much all the versions of this trope:
 * The ending of the first episode, when they revealed that the lost 13th colony that they were going to search for was called "Earth."
 * After the End:
 * It Was Our Homeworld All Along:
 * It (Wasn't) Earth All Along:
 * Before The Beginning: