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Much like a temporal [[BeCarefulWhatYouWishFor Monkey's Paw]], you might succeed at changing the thing you intended, but at a terrible cost. Telling your parents to move their money elsewhere gets them arrested for insider trading; the loved one you saved develops a wasting terminal cancer; the closet you moved is now on a weak floorboard and crashes through it, destroying your house. To repair the damage, it's usually necessary to travel in time again to SetRightWhatOnceWentWrong -- more specifically, to set right what ''you'' made go wrong.

to:

Much like a temporal [[BeCarefulWhatYouWishFor Monkey's Paw]], you might succeed at changing the thing you intended, but at a terrible cost. Telling your parents to move their money elsewhere gets them arrested for insider trading; the loved one you saved develops a wasting terminal cancer; the closet you moved is now on a weak floorboard and crashes through it, destroying your house. To repair the damage, it's usually necessary to travel in time again to SetRightWhatOnceWentWrong -- more specifically, to set right what ''you'' made go wrong.






[[folder:Films -- Live-Action]]

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[[folder:Films -- Live-Action]]




---> And therefore, if their edges are infinitely long, the wings must logically be infinitely big.

---> They may look about the right size for a butterfly's wings, but that's only because human beings have always preferred common sense to logic.

to:

\n---> And ---->And therefore, if their edges are infinitely long, the wings must logically be infinitely big.

--->
big.\\\
They may look about the right size for a butterfly's wings, but that's only because human beings have always preferred common sense to logic.
logic.



* Spoofed in ''Series/Danger5''. Our heroes travel back in time to UsefulNotes/WorldWarII and despite [[OnlySaneMan Pierre]] frantically trying to convince them of this trope proceed to kill Nazis with abandon, party with their younger selves, and SetRightWhatOnceWentWrong. This results in a BadFuture -- not because of anything they did, but [[HitlersTimeTravelExemptionAct because they were stuffing about instead of concentrating on their original mission: KILL HITLER!]]
* The short-lived anthology series ''Darkroom'' had the story "Stay Tuned, We'll Be Right Back." A man discovers his old crystal radio can connect to World War II. He decides to save the life of his father who died in the war by sending a message into the past to cause the German U-Boat to avoid torpedoing that ship. He finds his father now alive and running a local store but the man is no longer married with a child. His dad then hands him an ID card with an eagle insignia. At that moment, a man in an SS uniform enters for an order. Looking on the street, the man sees figures in Nazi uniforms about and the newspaper talking of the future of the American Reich. The episode ends with him realizing his actions have somehow allowed the Axis to win World War II.

to:

* Spoofed in ''Series/Danger5''. Our heroes travel back in time to UsefulNotes/WorldWarII and despite [[OnlySaneMan Pierre]] frantically trying to convince them of this trope proceed to kill Nazis with abandon, party with their younger selves, and SetRightWhatOnceWentWrong. This results in a BadFuture -- not because of anything they did, but [[HitlersTimeTravelExemptionAct because they were stuffing about instead of concentrating on their original mission: KILL HITLER!]]
* The short-lived anthology series ''Darkroom'' had the story "Stay Tuned, We'll Be Right Back." Back". A man discovers his old crystal radio can connect to World War II. He decides to save the life of his father who died in the war by sending a message into the past to cause the German U-Boat to avoid torpedoing that ship. He finds his father now alive and running a local store but the man is no longer married with a child. His dad then hands him an ID card with an eagle insignia. At that moment, a man in an SS uniform enters for an order. Looking on the street, the man sees figures in Nazi uniforms about and the newspaper talking of the future of the American Reich. The episode ends with him realizing his actions have somehow allowed the Axis to win World War II.



** While the show is mostly immune to this trope, with characters messing through time willy-nilly, it is used occasionally. The episode [[Recap/DoctorWhoS30E11TurnLeft "Turn Left"]] is probably the most striking example, with an ItsAWonderfulPlot twist.

to:

** While the show is mostly immune to this trope, with characters messing through time willy-nilly, it is used occasionally. The episode [[Recap/DoctorWhoS30E11TurnLeft "Turn Left"]] is probably the most striking example, with an ItsAWonderfulPlot twist. The butterfly in question, as the title indicates, was turning right instead of left at an intersection.



* In the now likely defunct webcomic ''WebComic/{{Adventures of John and Dave}}'', Dave goes back in time about three weeks to play a prank on Air Force One and finds that this caused Germany to win UsefulNotes/WorldWarII.
* ''Webcomic/SomethingHappens'' has some fun about it [[http://somethinghappens.keenspot.com/d/20070405.html here]].

to:

* In the now likely defunct webcomic ''WebComic/{{Adventures of John and Dave}}'', ''Webcomic/AdventuresOfJohnAndDave'', Dave goes back in time about three weeks to play a prank on Air Force One and finds that this caused Germany to win UsefulNotes/WorldWarII.
* ''Webcomic/SomethingHappens'' has some fun about it [[http://somethinghappens.keenspot.com/d/20070405.html here]].
UsefulNotes/WorldWarII.



%%* ''Webcomic/SomethingHappens'' has some fun about it [[http://somethinghappens.keenspot.com/d/20070405.html here]].



* ''WesternAnimation/TimeSquad'': Planet of the Flies, a {{parody}} of ''Film/{{Planet of the Apes|1968}}''. Tudrussel squashes a fly in the Stone Age, altering history so that the world is ruled by giant flies. Complete with a ruined Statue of Liberty scene. "You maniacs! You blew it all up!"
* ''WesternAnimation/PhineasAndFerb'': "Phineas and Ferb's Quantum Boogaloo" featured an adult Candace going back in time to bust Phineas and Ferb for the rollercoaster and returning to her own time to learn it was now a BadFuture. As it turns out, her effort to bust her brothers not only created a wave of child-proofing hysteria, but it caused Perry the Platypus to get injured by Dr. Doofenshmirtz's evil scheme backfiring, instead of Doofenshmirtz like in the original timeline. This allowed Doofenshmirtz to ride the wave of hysteria and take over the Tri-State Area, turning it into a ruined industrial dystopia where fun and creativity are outlawed, kids are kept in PeopleJars until they reach adulthood, and [[ArsonMurderAndJaywalking everyone is forced to change their name to "Joe"]].
* In the ''[[WesternAnimation/TheSimpsons Simpsons]]'' WesternAnimation/TreehouseOfHorror segment "[[Recap/TheSimpsonsS6E6TreehouseOfHorrorV Time and Punishment]]", [[MakesJustAsMuchSenseInContext a malfunctioning toaster]] transports Homer to the prehistoric past. He remembers some advice Grandpa gave him regarding [[LampshadeHanging this very trope]], then [[IgnoredEpiphany instantly forgets it]] to squash a bug. When he returns to the present, [[CrapsaccharineWorld Flanders has taken over the world]]. His attempts to fix the timeline cause alternate futures that range from even worse to just plain weird. When one of his sneezes causes all of the dinosaurs to drop dead, he moans, "This is gonna cost me." [[note]]Ironically enough, this results in a future that seems perfect for him: his sisters-in-laws are dead, his family is rich, the children are polite... but then he learns that donuts apparently don't exist in this timeline when he uses the word and nobody knows what he's talking about. He disappears into the past to try again, before we see that it ''rains'' donuts in this future.[[/note]] Homer eventually snaps and just starts whacking everything with a baseball bat, creating a future that's actually pretty near normal, except everyone has weird, elongated, lizard-like tongues.
-->'''Homer:''' ... ''(shrugging)'' Eh, close enough.

to:

* ''WesternAnimation/TimeSquad'': Planet Referenced [[SarcasmMode (sarcastically)]] in an episode of ''{{WesternAnimation/Archer}}'', when his stepfa- his [[InsistentTerminology mother's husband]] claims that them being attacked on the Flies, road for a {{parody}} of ''Film/{{Planet of suitcase was not his fault:
-->'''Archer:''' Yeah, no, I mean obviously this was all due to
the Apes|1968}}''. Tudrussel squashes butterfly effect.\\
'''Ron:''' The what?\\
'''Archer:''' Butterfly Effect. You know
a fly butterfly in Africa lands on a giraffe's nose, the giraffe sneezes, that spooks a gazelle, the gazelle bonks into a rhinoceros, and the rhinoceros blindly stampedes into a phone booth, calls New York somehow and says "Hey, go kill this idiot Ron for a suitcase ''[[SuddenlyShouting BECAUSE THE RHINOCEROS SPEAKS ENGLISH]]''".
* Invoked in one episode of ''WesternAnimation/DarkwingDuck'' where Darkwing and Gosalyn accidentally travel back to when Darkwing was a kid. Gosalyn tells Darkwing not to interfere
in the Stone Age, altering history past, so that Darkwing leaves rather than stop the world is ruled by giant flies. Complete King, an Elvis-themed villain with a ruined Statue of Liberty scene. "You maniacs! You blew shock-wave guitar, from committing a robbery. Then it all up!"
* ''WesternAnimation/PhineasAndFerb'': "Phineas
gets inverted where ''not'' interfering in the past is what causes the present to change, creating a world where the King rules the city. Thus, Darkwing and Ferb's Quantum Boogaloo" featured an adult Candace going Gosalyn have to go back to the past in a rare occurrence where SetRightWhatOnceWentWrong meets YouAlreadyChangedThePast (with a dash of StableTimeLoop as Darkwing inspired his younger self to become a hero).
* In the episode "Sword of Righteousness", ''WesternAnimation/EarthwormJim'' uses said sword to go
back in time to bust Phineas and Ferb shave UsefulNotes/AbrahamLincoln's beard at the Gettysburg Address ("Well, that's a big goodbye to my credibility.") to see if his face on the penny will change. When he gets back, he finds Peter Puppy dressed like Colonel Sanders:
-->'''Alt-Peter:''' What are y'all doin' now, Earthworm Bubba?\\
'''Jim:''' ''[sheepish]'' I think the training is going well...aside from changing the course of history and all...\\
'''Sword:''' Listen to me! You will go and put Lincoln's beard back! And then no more time-travel
for you, young worm!
* In one episode of ''WesternAnimation/FairlyOddParents'', Timmy accidentally melts his father's sports trophy with heat vision, so he [[SarcasmMode does
the rollercoaster logical thing]] and... goes back in time and prevents his father from winning the trophy in the first place. This creates a BadFuture in which Timmy's dad is a Big Brother-esque dictator [[HappinessIsMandatory who enforces happiness on the population]] and has a major complex about the lost trophy. Timmy goes back and fixes the mess by winning the trophy in his father's stead, and everything returns to normal except that [[ItMakesSenseInContext Timmy and the Internet have swapped names]].
** In another episode, Timmy travels back to March 15, 1972 to try and prevent the incident that turned Denzel Crocker in the fairy-obsessed miser he is today. [[NiceJobBreakingItHero Timmy instead ends up]] ''[[NiceJobBreakingItHero causing]]'' [[NiceJobBreakingItHero said incident]], and is then banned from ever
returning to her own time March 1972. In the process, he also somehow causes George [=McGovern=] to learn it was now a BadFuture. As it turns out, her effort to bust her brothers not only created a wave of child-proofing hysteria, but it win the 1972 presidential election, as he's then warned against interfering with said election win despite having caused Perry it in the Platypus first place.
* Brian in ''WesternAnimation/FamilyGuy'' goes back several years in time with Stewie
to get injured by Dr. Doofenshmirtz's evil scheme backfiring, instead see where he had buried a ball. Stewie warns Brian not to touch anything or to talk to anyone, for doing so could alter their present time. Once the duo returns to their original time, Stewie discovers that Brian had told his past self about the September 11th terrorist attacks, which caused his past self to stop the attacks from ever happening. Sounds good, right? Sure, the lives of Doofenshmirtz 3000+ people were saved, but the action caused George W. Bush to lose his reelection for U.S. President in 2004, which motivates him to have all the southern states secede from the rest of the country and declare a second civil war, but with nukes being used and causing the death of over a ''million'' people. Whoops. The duo go back in time again to fix the mess, only for Brian to do more dumb things like giving his past self the idea to create ''Literature/HarryPotter''. Stewie eventually decides to go back to the very point where their past selves first time traveled and he shoots Brian in the kneecaps while screaming at him and his past self to go back home. Current Brian realizes that doing this will erase their existence since the time traveling shenanigans would have never happened. Naturally, the two of them disappear while the original timeline. This allowed Doofenshmirtz to ride the wave of hysteria Stewie and take over the Tri-State Area, turning it into a ruined industrial dystopia where fun and creativity Brian are outlawed, kids are kept back in PeopleJars until they reach adulthood, and [[ArsonMurderAndJaywalking everyone is forced to change their name to "Joe"]].
* In the ''[[WesternAnimation/TheSimpsons Simpsons]]'' WesternAnimation/TreehouseOfHorror segment "[[Recap/TheSimpsonsS6E6TreehouseOfHorrorV Time
own time with Peter and Punishment]]", [[MakesJustAsMuchSenseInContext a malfunctioning toaster]] transports Homer to the prehistoric past. He remembers some advice Grandpa gave him regarding [[LampshadeHanging this very trope]], then [[IgnoredEpiphany instantly forgets it]] to squash a bug. When he returns to the present, [[CrapsaccharineWorld Flanders has taken over the world]]. His attempts to fix the timeline cause alternate futures that range his drinking buddies from even worse to just plain weird. When one of his sneezes causes all of the dinosaurs to drop dead, he moans, "This is gonna cost me." [[note]]Ironically enough, this results pilot episode showing up in a future that seems perfect for him: his sisters-in-laws are dead, his family is rich, the children are polite... but then he learns that donuts apparently don't exist in this timeline when he uses the word and nobody knows what he's talking about. He disappears into the past to try again, before we see that it ''rains'' donuts in this future.[[/note]] Homer eventually snaps and just starts whacking everything with a baseball bat, creating a future that's actually pretty near normal, except everyone has weird, elongated, lizard-like tongues.
-->'''Homer:''' ... ''(shrugging)'' Eh, close enough.
same crudely drawn animations.



* In one episode of ''WesternAnimation/TheMightyB'', Bessie travels back to prehistoric times to find dinosaur bones to earn a Paleontology badge. While there, she constantly tells Happy not to touch anything. When she ends up angering a trio of dinosaurs, Bessie is forced to return to the present without Happy (but ends up taking the dinosaurs with her). While she's gone, Happy decides to indulge himself until she gets back. Upon returning to the present, they find that dogs have become the dominate species on the planet.
-->'''Bessie''': Happy! Just what exactly do you think it means when I say "Don't touch anything"?!
* In the ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' season 5 two-part finale "The Cutie Remark", Starlight Glimmer, in a fit of rage over the Mane Six breaking up her village of "equality", enacts a time travel spell to prevent Rainbow Dash's first Sonic Rainboom, preventing the Mane Six from gaining their Cutie Marks at that point and creating their future bonds. Twilight constantly goes back to stop her, but each time she does so, it just creates a worse and worse future - One where King Sombra conquers Equestria, one with the Changelings in charge, then Nightmare Moon, Tirek, Discord, ''[[ArsonMurderAndJaywalking the Flim Flam Brothers]]'', then ultimately nothing but a barren wasteland. Twilight ends up dragging Starlight into this last timeline to show her what she's doing. [[VillainousBreakdown She doesn't take it well.]]
* ''WesternAnimation/PhineasAndFerb'': "Phineas and Ferb's Quantum Boogaloo" featured an adult Candace going back in time to bust Phineas and Ferb for the rollercoaster and returning to her own time to learn it was now a BadFuture. As it turns out, her effort to bust her brothers not only created a wave of child-proofing hysteria, but it caused Perry the Platypus to get injured by Dr. Doofenshmirtz's evil scheme backfiring, instead of Doofenshmirtz like in the original timeline. This allowed Doofenshmirtz to ride the wave of hysteria and take over the Tri-State Area, turning it into a ruined industrial dystopia where fun and creativity are outlawed, kids are kept in PeopleJars until they reach adulthood, and [[ArsonMurderAndJaywalking everyone is forced to change their name to "Joe"]].



* In the episode "Sword of Righteousness", WesternAnimation/EarthwormJim uses said sword to go back in time and shave UsefulNotes/AbrahamLincoln's beard at the Gettysburg Adress ("Well, that's a big goodbye to my credibility.") to see if his face on the penny will change. When he gets back, he finds Peter Puppy dressed like Colonel Sanders:
-->'''Alt-Peter:''' What are y'all doin' now, Earthworm Bubba?\\
'''Jim:''' ''[sheepish]'' I think the training is going well...aside from changing the course of history and all...\\
'''Sword:''' Listen to me! You will go and put Lincoln's beard back! And then no more time-travel for you, young worm!
* Brian in ''WesternAnimation/FamilyGuy'' goes back several years in time with Stewie to see where he had buried a ball. Stewie warns Brian not to touch anything or to talk to anyone, for doing so could alter their present time. Once the duo returns to their original time, Stewie discovers that Brian had told his past self about the September 11th terrorist attacks, which caused his past self to stop the attacks from ever happening. Sounds good, right? Sure, the lives of 3000+ people were saved, but the action caused George W. Bush to lose his reelection for U.S. President in 2004, which motivates him to have all the southern states secede from the rest of the country and declare a second civil war, but with nukes being used and causing the death of over a ''million'' people. Whoops. The duo go back in time again to fix the mess, only for Brian to do more dumb things like giving his past self the idea to create ''Literature/HarryPotter''. Stewie eventually decides to go back to the very point where their past selves first time traveled and he shoots Brian in the kneecaps while screaming at him and his past self to go back home. Current Brian realizes that doing this will erase their existence since the time traveling shenanigans would have never happened. Naturally, the two of them disappear while the original Stewie and Brian are back in their own time with Peter and his drinking buddies from the pilot episode showing up in the same crudely drawn animations.
* In the ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' season 5 two-part finale "The Cutie Remark", Starlight Glimmer, in a fit of rage over the Mane Six breaking up her village of "equality", enacts a time travel spell to prevent Rainbow Dash's first Sonic Rainboom, preventing the Mane Six from gaining their Cutie Marks at that point and creating their future bonds. Twilight constantly goes back to stop her, but each time she does so, it just creates a worse and worse future - One where King Sombra conquers Equestria, one with the Changelings in charge, then Nightmare Moon, Tirek, Discord, ''[[ArsonMurderAndJaywalking the Flim Flam Brothers]]'', then ultimately nothing but a barren wasteland. Twilight ends up dragging Starlight into this last timeline to show her what she's doing. [[VillainousBreakdown She doesn't take it well.]]
* Invoked in one episode of ''WesternAnimation/DarkwingDuck'' where Darkwing and Gosalyn accidentally travel back to when Darkwing was a kid. Gosalyn tells Darkwing not to interfere in the past, so Darkwing leaves rather than stop the King, an Elvis-themed villain with a shock-wave guitar, from committing a robbery. Then it gets inverted where ''not'' interfering in the past is what causes the present to change, creating a world where the King rules the city. Thus, Darkwing and Gosalyn have to go back to the past in a rare occurrence where SetRightWhatOnceWentWrong meets YouAlreadyChangedThePast (with a dash of StableTimeLoop as Darkwing inspired his younger self to become a hero).
* In one episode of ''WesternAnimation/FairlyOddParents'', Timmy accidentally melts his father's sports trophy with heat vision, so he [[SarcasmMode does the logical thing]] and... goes back in time and prevents his father from winning the trophy in the first place. This creates a BadFuture in which Timmy's dad is a Big Brother-esque dictator [[HappinessIsMandatory who enforces happiness on the population]] and has a major complex about the lost trophy. Timmy goes back and fixes the mess by winning the trophy in his father's stead, and everything returns to normal except that [[ItMakesSenseInContext Timmy and the Internet have swapped names]].
** In another episode, Timmy travels back to March 15, 1972 to try and prevent the incident that turned Denzel Crocker in the fairy-obsessed miser he is today. [[NiceJobBreakingItHero Timmy instead ends up]] ''[[NiceJobBreakingItHero causing]]'' [[NiceJobBreakingItHero said incident]], and is then banned from ever returning to March 1972. In the process, he also somehow causes George [=McGovern=] to win the 1972 presidential election, as he's then warned against interfering with said election win despite having caused it in the first place.
* ''WesternAnimation/StevenUniverse'': In "Steven and the Stevens", Steven accidentally travels back in time with a magic hourglass, and tries to stop Yellowtail's boat from getting stuck in Greg's carwash, preventing Greg from performing with his son at Beach-a-palooza. It works, but Yellowtail's truck accidentally crashes into a telephone pole and causes a huge fire at the car-wash. This puts Steven off of any more attempts at using the "time thing" to change the future.

to:

* In the episode "Sword ''[[WesternAnimation/TheSimpsons Simpsons]]'' WesternAnimation/TreehouseOfHorror segment "[[Recap/TheSimpsonsS6E6TreehouseOfHorrorV Time and Punishment]]", [[MakesJustAsMuchSenseInContext a malfunctioning toaster]] transports Homer to the prehistoric past. He remembers some advice Grandpa gave him regarding [[LampshadeHanging this very trope]], then [[IgnoredEpiphany instantly forgets it]] to squash a bug. When he returns to the present, [[CrapsaccharineWorld Flanders has taken over the world]]. His attempts to fix the timeline cause alternate futures that range from even worse to just plain weird. When one of Righteousness", WesternAnimation/EarthwormJim his sneezes causes all of the dinosaurs to drop dead, he moans, "This is gonna cost me." [[note]]Ironically enough, this results in a future that seems perfect for him: his sisters-in-laws are dead, his family is rich, the children are polite... but then he learns that donuts apparently don't exist in this timeline when he uses said sword to go back in time the word and shave UsefulNotes/AbrahamLincoln's beard at nobody knows what he's talking about. He disappears into the Gettysburg Adress ("Well, past to try again, before we see that it ''rains'' donuts in this future.[[/note]] Homer eventually snaps and just starts whacking everything with a baseball bat, creating a future that's a big goodbye to my credibility.") to see if his face on the penny will change. When he gets back, he finds Peter Puppy dressed like Colonel Sanders:
-->'''Alt-Peter:''' What are y'all doin' now, Earthworm Bubba?\\
'''Jim:''' ''[sheepish]'' I think the training is going well...aside from changing the course of history and all...\\
'''Sword:''' Listen to me! You will go and put Lincoln's beard back! And then no more time-travel for you, young worm!
* Brian in ''WesternAnimation/FamilyGuy'' goes back several years in time with Stewie to see where he had buried a ball. Stewie warns Brian not to touch anything or to talk to anyone, for doing so could alter their present time. Once the duo returns to their original time, Stewie discovers that Brian had told his past self about the September 11th terrorist attacks, which caused his past self to stop the attacks from ever happening. Sounds good, right? Sure, the lives of 3000+ people were saved, but the action caused George W. Bush to lose his reelection for U.S. President in 2004, which motivates him to have all the southern states secede from the rest of the country and declare a second civil war, but with nukes being used and causing the death of over a ''million'' people. Whoops. The duo go back in time again to fix the mess, only for Brian to do more dumb things like giving his past self the idea to create ''Literature/HarryPotter''. Stewie eventually decides to go back to the very point where their past selves first time traveled and he shoots Brian in the kneecaps while screaming at him and his past self to go back home. Current Brian realizes that doing this will erase their existence since the time traveling shenanigans would have never happened. Naturally, the two of them disappear while the original Stewie and Brian are back in their own time with Peter and his drinking buddies from the pilot episode showing up in the same crudely drawn animations.
* In the ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' season 5 two-part finale "The Cutie Remark", Starlight Glimmer, in a fit of rage over the Mane Six breaking up her village of "equality", enacts a time travel spell to prevent Rainbow Dash's first Sonic Rainboom, preventing the Mane Six from gaining their Cutie Marks at that point and creating their future bonds. Twilight constantly goes back to stop her, but each time she does so, it just creates a worse and worse future - One where King Sombra conquers Equestria, one with the Changelings in charge, then Nightmare Moon, Tirek, Discord, ''[[ArsonMurderAndJaywalking the Flim Flam Brothers]]'', then ultimately nothing but a barren wasteland. Twilight ends up dragging Starlight into this last timeline to show her what she's doing. [[VillainousBreakdown She doesn't take it well.]]
* Invoked in one episode of ''WesternAnimation/DarkwingDuck'' where Darkwing and Gosalyn accidentally travel back to when Darkwing was a kid. Gosalyn tells Darkwing not to interfere in the past, so Darkwing leaves rather than stop the King, an Elvis-themed villain with a shock-wave guitar, from committing a robbery. Then it gets inverted where ''not'' interfering in the past is what causes the present to change, creating a world where the King rules the city. Thus, Darkwing and Gosalyn have to go back to the past in a rare occurrence where SetRightWhatOnceWentWrong meets YouAlreadyChangedThePast (with a dash of StableTimeLoop as Darkwing inspired his younger self to become a hero).
* In one episode of ''WesternAnimation/FairlyOddParents'', Timmy accidentally melts his father's sports trophy with heat vision, so he [[SarcasmMode does the logical thing]] and... goes back in time and prevents his father from winning the trophy in the first place. This creates a BadFuture in which Timmy's dad is a Big Brother-esque dictator [[HappinessIsMandatory who enforces happiness on the population]] and has a major complex about the lost trophy. Timmy goes back and fixes the mess by winning the trophy in his father's stead, and everything returns to normal
actually pretty near normal, except that [[ItMakesSenseInContext Timmy and the Internet have swapped names]].
** In another episode, Timmy travels back to March 15, 1972 to try and prevent the incident that turned Denzel Crocker in the fairy-obsessed miser he is today. [[NiceJobBreakingItHero Timmy instead ends up]] ''[[NiceJobBreakingItHero causing]]'' [[NiceJobBreakingItHero said incident]], and is then banned from ever returning to March 1972. In the process, he also somehow causes George [=McGovern=] to win the 1972 presidential election, as he's then warned against interfering with said election win despite having caused it in the first place.
everyone has weird, elongated, lizard-like tongues.
-->'''Homer:''' ... ''(shrugging)'' Eh, close enough.
* ''WesternAnimation/StevenUniverse'': In [[Recap/StevenUniverseS1E22StevenAndTheStevens "Steven and the Stevens", Stevens"]], Steven accidentally travels back in time with a magic hourglass, and tries to stop Yellowtail's boat from getting stuck in Greg's carwash, preventing Greg from performing with his son at Beach-a-palooza. Beach-a-Palooza. It works, but Yellowtail's truck accidentally crashes into a telephone pole and causes a huge fire at the car-wash. carwash. This puts Steven off of any more attempts at using the "time thing" to change the future.future.
* ''WesternAnimation/TeenTitans'': Referenced by Cyborg when he gets stranded in the past in "Cyborg the Barbarian", and he intends to remain in his exact position and not touch anything...until he sees he's literally [[OhCrap standing in-between]] two [[OnrushingArmy Onrushing Armies]]. The ending implies it was a StableTimeLoop all along.
* ''WesternAnimation/TimeSquad'': Planet of the Flies, a {{parody}} of ''Film/{{Planet of the Apes|1968}}''. Tudrussel squashes a fly in the Stone Age, altering history so that the world is ruled by giant flies. Complete with a ruined Statue of Liberty scene. "You maniacs! You blew it all up!"



* ''WesternAnimation/TeenTitans'': Referenced by Cyborg when he gets stranded in the past in "Cyborg the Barbarian", and he intends to remain in his exact position and not touch anything...until he sees he's literally [[OhCrap standing in-between]] two [[OnrushingArmy Onrushing Armies]]. The ending implies it was a StableTimeLoop all along.
* In one episode of ''WesternAnimation/TheMightyB'', Bessie travels back to prehistoric times to find dinosaur bones to earn a Paleontology badge. While there, she constantly tells Happy not to touch anything. When she ends up angering a trio of dinosaurs, Bessie is forced to return to the present without Happy (but ends up taking the dinosaurs with her). While she's gone, Happy decides to indulge himself until she gets back. Upon returning to the present, they find that dogs have become the dominate species on the planet.
-->'''Bessie''': "Happy! Just what exactly do you think it means when I say 'Don't touch anything'?!"
* Referenced [[SarcasmMode (sarcastically)]] in an episode of ''{{WesternAnimation/Archer}}'', when his stepfa- his [[InsistentTerminology mother's husband]] claims that them being attacked on the road for a suitcase was not his fault:
-->'''Archer:''' Yeah, no, I mean obviously this was all due to the butterfly effect.
-->'''Ron:''' The what?
-->'''Archer:''' Butterfly Effect. You know a butterfly in Africa lands on a giraffes nose, the giraffe sneezes, that spooks a gazelle, the gazelle bonks into a rhinoceros, and the rhinoceros blindly stampedes into a phone booth, calls New York somehow and says "Hey, go kill this idiot Ron for a suitcase ''[[SuddenlyShouting BECAUSE THE RHINOCEROS SPEAKS ENGLISH]]''".


See also FinaglesLaw, HitlersTimeTravelExemptionAct, SchrodingersButterfly, RubeGoldbergDevice, RubeGoldbergHatesYourGuts, NecroNonSequitur, ForWantOfANail and RippleEffectProofMemory. Contrast SaveThisPersonSaveTheWorld and MergedReality. Unrelated to ButterflyOfTransformation or its subtropes.

to:

See also FinaglesLaw, HitlersTimeTravelExemptionAct, SchrodingersButterfly, RubeGoldbergDevice, RubeGoldbergHatesYourGuts, NecroNonSequitur, NonSequiturCausality, ForWantOfANail and RippleEffectProofMemory. Contrast SaveThisPersonSaveTheWorld and MergedReality. Unrelated to ButterflyOfTransformation or its subtropes.


-->-- '''Cyborg''', ''WesternAnimation/TeenTitans''

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-->-- '''Cyborg''', ''WesternAnimation/TeenTitans''''WesternAnimation/TeenTitans'', "Cyborg The Barbarian"



* ''WesternAnimation/StevenUniverse'': In "Steven and the Steven", Steven accidentally travels back in time with a magic hourglass, and tries to stop Yellowtail's boat from getting stuck in Greg's carwash, preventing Greg from performing with his son at Beach-a-palooza. It works, but Yellowtail's truck accidentally crashes into a telephone pole and causes a huge fire at the car-wash. This puts Steven off of any more attempts at using the "time thing" to change the future.

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* ''WesternAnimation/StevenUniverse'': In "Steven and the Steven", Stevens", Steven accidentally travels back in time with a magic hourglass, and tries to stop Yellowtail's boat from getting stuck in Greg's carwash, preventing Greg from performing with his son at Beach-a-palooza. It works, but Yellowtail's truck accidentally crashes into a telephone pole and causes a huge fire at the car-wash. This puts Steven off of any more attempts at using the "time thing" to change the future.



* Referenced by Cyborg in ''WesternAnimation/TeenTitans'' as the page quote shows, and he intends to remain in his exact position and not touch anything...until he sees he's literally [[OhCrap standing in-between]] two [[OnrushingArmy Onrushing Armies]]. The ending implies it was a StableTimeLoop all along.

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* ''WesternAnimation/TeenTitans'': Referenced by Cyborg when he gets stranded in ''WesternAnimation/TeenTitans'' as the page quote shows, past in "Cyborg the Barbarian", and he intends to remain in his exact position and not touch anything...until he sees he's literally [[OhCrap standing in-between]] two [[OnrushingArmy Onrushing Armies]]. The ending implies it was a StableTimeLoop all along.

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* ''WesternAnimation/StevenUniverse'': In "Steven and the Steven", Steven accidentally travels back in time with a magic hourglass, and tries to stop Yellowtail's boat from getting stuck in Greg's carwash, preventing Greg from performing with his son at Beach-a-palooza. It works, but Yellowtail's truck accidentally crashes into a telephone pole and causes a huge fire at the car-wash. This puts Steven off of any more attempts at using the "time thing" to change the future.


* In one episode of ''WesternAnimation/FairlyOddParents'', Timmy accidentally melts his father's sports trophy, so he [[SarcasmMode does the logical thing]] and... goes back in time and prevents his father from winning the trophy in the first place. This creates a BadFuture in which Timmy's dad is a Big Brother-esque dictator who enforces happiness on the population and has a major complex about the lost trophy. Timmy goes back and fixes the mess by winning the trophy in his father's stead, and everything returns to normal except that [[ItMakesSenseInContext Timmy and the Internet have swapped names]].

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* In one episode of ''WesternAnimation/FairlyOddParents'', Timmy accidentally melts his father's sports trophy, trophy with heat vision, so he [[SarcasmMode does the logical thing]] and... goes back in time and prevents his father from winning the trophy in the first place. This creates a BadFuture in which Timmy's dad is a Big Brother-esque dictator [[HappinessIsMandatory who enforces happiness on the population population]] and has a major complex about the lost trophy. Timmy goes back and fixes the mess by winning the trophy in his father's stead, and everything returns to normal except that [[ItMakesSenseInContext Timmy and the Internet have swapped names]].


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->''"[[Film/JurassicPark That's--That's chaos theory!]]"''


* Hysterically parodied in a ''Series/TheWhitestKidsUKnow'' sketch. Every time Trevor and Sam try to change history, random things happen (because that's how physics works). They go back in time and kill Hitler; JFK turns into a panda bear. They stop two Godzilla-esque monsters from attacking each other and cause the Vietnam War. After preventing 9/11, one of the character's sister starts to disappear from a picture (a parody of ''Back to the Future''). In response, they scream "We have go back and save 9/11!" Seems the maker of the show didn't know anyone close to the attack.

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* Hysterically parodied in a ''Series/TheWhitestKidsUKnow'' sketch. Every time Trevor and Sam try to change history, random things happen (because that's how physics works). They go back in time and kill Hitler; JFK turns into a panda bear. They stop two Godzilla-esque monsters from attacking each other and cause the Vietnam War. After preventing 9/11, one of the character's sister starts to disappear from a picture (a parody of ''Back to the Future''). In response, they scream "We have go back and save 9/11!" Seems the maker of the show didn't know anyone close to the attack.9/11!"


* The season 2 finale of ''Series/TheOrville'' sees history radically changed for the worse as a result of Kelly's decision in the previous episode. [[spoiler:Past!Kelly, having seen her own future and undergone a failed memory wipe, decides not to go on a second date with Ed. As a result, she and Ed never joined the Orville. Without them, neither did Gordon or Claire. The Kaylon have taken over the galaxy in this new timeline in which Kelly and Gordon never got word to the Krill and Isaac never bonded with Claire and her sons, meaning he never developed a sense of kinship with biological lifeforms]].

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* The season 2 finale of ''Series/TheOrville'' sees history radically changed for the worse as a result of Kelly's decision in the previous episode. [[spoiler:Past!Kelly, having seen her own future and undergone a failed memory wipe, decides not to go on a second date with Ed. As a result, she and Ed never joined the Orville. Without them, neither did Gordon or Claire. The Kaylon have taken over the galaxy in this new timeline in which Kelly and Gordon never got word to the Krill and Isaac never bonded with Claire and her sons, meaning he never developed a the sense of kinship with biological lifeforms]].lifeforms that prompted him to turn against his own race]].

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* The season 2 finale of ''Series/TheOrville'' sees history radically changed for the worse as a result of Kelly's decision in the previous episode. [[spoiler:Past!Kelly, having seen her own future and undergone a failed memory wipe, decides not to go on a second date with Ed. As a result, she and Ed never joined the Orville. Without them, neither did Gordon or Claire. The Kaylon have taken over the galaxy in this new timeline in which Kelly and Gordon never got word to the Krill and Isaac never bonded with Claire and her sons, meaning he never developed a sense of kinship with biological lifeforms]].


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[[folder:Web Comics]][[folder:Webcomics]]





* In the Italian comic book ''Lilith'' the protagonist travels through time to [[SetRightWhatOnceWentWrong prevent the germination of the Triacanto, a parasite that will decimate mankind and force it to live underground]]-and to do so she has to find every single [[PatientZero first bearer of every infection strain]] before it matures and starts infecting others and neutralize it in a way that ''will'' provoke their death, fully knowing that both this act and whatever she does to destroy the Triacanto will cause small and large alterations of the timeline, even going on the mission in the full knowledge she'll prevent her own birth. By the time she finally tracks down the source of the Triacanto, [[spoiler:the Danes kept colonies in North America until they lost them to Britain in the ''18th century'', the defeat of Cortez' expedition against Aztecs with horses, steel weapons and resistance to smallpox caused the birth of a hybrid Aztec-Spanish culture after Spain managed to overrun Mexico anyway, Japan started expanding after UsefulNotes/TokugawaIeyasu died at Sekigahara and went on to conquer Korea and colonize North America to the Rockies, Joseon turtle ships (sent in a failed attempt at getting British help to regain Korea) intercepted the Crossing of the Delaware leading to the defeat of the Colonials in the "Rebellion of the Thirteen Colonies" and Britain eventually conquering North America to the Rockies, and the [[UsefulNotes/WorldWarI Great War]] did not start until 1933, after Germany fagocitated Austria and the Tsar found himself a puppet of the Duma. ''Then'' Lilith returns to America after the Revolutionary War and meets up with the survivors of the US Founding Fathers trying to get Japanese help for their cause...]].

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* In the Italian comic book ''Lilith'' ''ComicBook/{{Lilith}}'' the protagonist travels through time to [[SetRightWhatOnceWentWrong prevent the germination of the Triacanto, a parasite that will decimate mankind and force it to live underground]]-and to do so she has to find every single [[PatientZero first bearer of every infection strain]] before it matures and starts infecting others and neutralize it in a way that ''will'' provoke their death, fully knowing that both this act and whatever she does to destroy the Triacanto will cause small and large alterations of the timeline, even going on the mission in the full knowledge she'll prevent her own birth. By the time she finally tracks down the source of the Triacanto, [[spoiler:the Danes kept colonies in North America until they lost them to Britain in the ''18th century'', the defeat of Cortez' expedition against Aztecs with horses, steel weapons and resistance to smallpox caused the birth of a hybrid Aztec-Spanish culture after Spain managed to overrun Mexico anyway, Japan started expanding after UsefulNotes/TokugawaIeyasu died at Sekigahara and went on to conquer Korea and colonize North America to the Rockies, Joseon turtle ships (sent in a failed attempt at getting British help to regain Korea) intercepted the Crossing of the Delaware leading to the defeat of the Colonials in the "Rebellion of the Thirteen Colonies" and Britain eventually conquering North America to the Rockies, and the [[UsefulNotes/WorldWarI Great War]] did not start until 1933, after Germany fagocitated Austria and the Tsar found himself a puppet of the Duma. ''Then'' Lilith returns to America after the Revolutionary War and meets up with the survivors of the US Founding Fathers trying to get Japanese help for their cause...]].

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* Inverted in ''Fanfic/GoingAnotherWay''. Only two changes were done to the timeline - Shinji being sent to live with his uncle instead of an uncaring teacher and Rei not being burdened with a part of Lilith's soul. The butterfly takes care of all other changes, but in this case, it's a changed for the better (logical, considering the canon).

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* The short-lived anthology series ''Darkroom'' had the story "Stay Tuned, We'll Be Right Back." A man discovers his old crystal radio can connect to World War II. He decides to save the life of his father who died in the war by sending a message into the past to cause the German U-Boat to avoid torpedoing that ship. He finds his father now alive and running a local store but the man is no longer married with a child. His dad then hands him an ID card with an eagle insignia. At that moment, a man in an SS uniform enters for an order. Looking on the street, the man sees figures in Nazi uniforms about and the newspaper talking of the future of the American Reich. The episode ends with him realizing his actions have somehow allowed the Axis to win World War II.

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* In ''Webcomic/{{Rebirth}}'', Noah somehow travels back in time to the early days of the zombie apocalypse to correct his mistakes. Much of the conflict is him desperately trying to change things without triggering this effect.


[-[[caption-width-right:285:[[SpaceWhaleAesop Remember, kids: don't sneeze on dinosaurs, unless you want your neighbor to be Big Brother]].]]-]

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[-[[caption-width-right:285:[[SpaceWhaleAesop [-[[caption-width-right:285:[[SpoofAesop Remember, kids: don't sneeze on dinosaurs, unless you want your neighbor to be Big Brother]].]]-]

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