History Main / GrandfatherParadox

21st May '16 2:21:12 PM Doug86
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* [[IDWPublishing IDW]]'s ''ComicBook/BackToTheFuture'' establishes 1985-A (the hellish 1985 from ''Film/BackToTheFuturePartII'') as an impending grandfather paradox, as Doc Brown finds out that his alternate universe double [[spoiler:has been lobotomized]]. If Doc Brown never builds the time machine, then Old Biff can't give the almanac to his 1955 self; and if he doesn't give the almanac to himself, then 1985-A can't happen...

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* [[IDWPublishing [[Creator/IDWPublishing IDW]]'s ''ComicBook/BackToTheFuture'' establishes 1985-A (the hellish 1985 from ''Film/BackToTheFuturePartII'') as an impending grandfather paradox, as Doc Brown finds out that his alternate universe double [[spoiler:has been lobotomized]]. If Doc Brown never builds the time machine, then Old Biff can't give the almanac to his 1955 self; and if he doesn't give the almanac to himself, then 1985-A can't happen...
6th May '16 4:27:01 PM eroock
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[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/grandfather_paradox.jpg]]
%%source: Internet
6th May '16 4:26:15 PM eroock
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[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/grandfather_paradox.jpg]]
%%source: Internet
27th Feb '16 2:51:15 PM DynamiteXI
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* [[IDWPublishing IDW]]'s ''ComicBook/BackToTheFuture'' establishes 1985-A (the hellish 1985 from ''Film/BackToTheFuturePartII'') as an impending grandfather paradox, as Doc Brown finds out that his alternate universe double [[spoiler:has been lobotomized]]. If Doc Brown never builds the time machine, then Old Biff can't give the almanac to his 1955 self; and if he doesn't give the almanac to himself, then 1985-A can't happen...
27th Jan '16 9:47:11 AM ChronoLegion
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* In ''VideoGame/TheJourneymanProject'' series, it's fairly easy to change something in the past, but, since the DelayedRippleEffect travels only forward in time, it will not affect the time traveler himself, provided he doesn't return before the wave reaches his point of departure. This is also how, in the first game, the [[TimePolice Temporal Security Annex]] keeps a copy of the world history from being overwritten by a time wave. A disk with the copy is kept in the distant past. If a ripple is detected ([[HandWave somehow]]), a time agent it sent back to that period to retrieve the copy, which can be then compared in the present to the history in the Annex's data banks to figure out the point of divergence. This is {{Hand Wave}}d in later games, and the TSA simply knows where and when the change took place without the copy, but an agent still needs to be sent back before the wave hits to avoid him or her becoming part of the new timeline.
27th Jan '16 9:37:00 AM ChronoLegion
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* In an episode of ''WesternAnimation/{{Futurama}}'', Fry goes back to Roswell in 1947 and accidentally gets his grandfather killed in an atomic blast [[DefiedTrope while trying to avert this]]. He doesn't stop existing because he ''also'' ends up doing his grandmother, becoming [[MyOwnGrampa his own grandfather]]. Or, as he puts it, "I did do the nasty in the pasty." [[spoiler:This becomes a key plot point in later episodes, as the extreme inbreeding causes him to have a birth defect that makes him immune to a number of things.]]

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* In an episode of ''WesternAnimation/{{Futurama}}'', Fry goes back to Roswell in 1947 and accidentally gets his grandfather killed in an atomic blast [[DefiedTrope while trying to avert this]]. He doesn't stop existing because he ''also'' ends up doing his grandmother, becoming [[MyOwnGrampa his own grandfather]]. Or, as he puts it, "I did do the nasty in the pasty." [[spoiler:This becomes a key plot point in later episodes, as the extreme inbreeding causes him to have a birth defect that makes him immune to a number of things.]]]] This also means that, instead of merely being Professor Farnsworth's lateral ancestor (who is descended from Fry's brother), he is also the Professor's direct ancestor.
27th Jan '16 9:30:39 AM ChronoLegion
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* ''Series/TheFlash2014'': Avoiding the complications of the Grandfather Paradox is first implied, then confirmed to be the reason that the Reverse Flash [[spoiler: aka Eobard Thawne aka Harrison Wells]] spares Eddie Thawne's life in the "The Man in the Yellow Suit". In the first season finale, [[spoiler: Eddie takes advantage of this and ''shoots himself'' to erase Eobard from existence. Unfortunately, the ensuing paradox might be why a planet-threatening singularity shows up afterwards.]]

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* ''Series/TheFlash2014'': Avoiding the complications of the Grandfather Paradox is first implied, then confirmed to be the reason that the Reverse Flash [[spoiler: aka Eobard Thawne aka Harrison Wells]] spares Eddie Thawne's life in the "The Man in the Yellow Suit". In the first season finale, [[spoiler: Eddie takes advantage of this and ''shoots himself'' to erase Eobard from existence. Unfortunately, the ensuing paradox might be why a planet-threatening singularity shows up afterwards.]]]] In a later episode, [[spoiler:the Reverse Flash returns, being an earlier version of the villain from before he traveled back in time to kill the Flash as a child (it's speculated that he was protected from the paradox by the Speed Force, as he would need to travel back in time again to set all the events into motion)]].
23rd Jan '16 6:57:51 PM BattleMaster
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* [[MadScientist Brainstorm]] built a time machine in ''ComicBook/TransformersMoreThanMeetsTheEye'' that was specifically constructed to be immune to this paradox [[spoiler: so that he could go into the past and kill Megatron before the Great War started]].
15th Jan '16 6:43:28 AM Morgenthaler
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* ''FengShui'' goes with a belt-and-suspenders approach. Actually changing history is hard and requires taking possession of feng shui sites; doing something minor like shooting your own grandfather changes nothing. Johnny Wong will return to the present to discover that his grandmother met someone functionally identical to his old grandfather and the only difference is that his name is now Johnny Fong. If you ''do'' make the effort to make your changes stick, you can shift history so that you never existed... but accessing the Netherworld (the method of time travel) immediately locks in your personal timeline at that point, and you will never be affected by future shifts. So Johnny Wong returns to a present where he doesn't exist and never did, but he still exists because he's locked to a timeline where he existed. (The Netherworld is full of people who had one too many shifts happen to them and retreated from a world they no longer know and which no longer knows them.)

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* ''FengShui'' ''TabletopGame/FengShui'' goes with a belt-and-suspenders approach. Actually changing history is hard and requires taking possession of feng shui sites; doing something minor like shooting your own grandfather changes nothing. Johnny Wong will return to the present to discover that his grandmother met someone functionally identical to his old grandfather and the only difference is that his name is now Johnny Fong. If you ''do'' make the effort to make your changes stick, you can shift history so that you never existed... but accessing the Netherworld (the method of time travel) immediately locks in your personal timeline at that point, and you will never be affected by future shifts. So Johnny Wong returns to a present where he doesn't exist and never did, but he still exists because he's locked to a timeline where he existed. (The Netherworld is full of people who had one too many shifts happen to them and retreated from a world they no longer know and which no longer knows them.)
12th Jan '16 9:59:34 PM M84
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[[folder:Comic Books]]
* Miguel O'Hara from ''Comicbook/SpiderMan2099'' (2014 series) isn't sure exactly what would happen to him if his grandfather Tiberius Stone dies on his watch and he's not eager to find out. This leaves Miguel in the unenviable position of protecting a man he quite rightfully despises.
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http://tvtropes.org/pmwiki/article_history.php?article=Main.GrandfatherParadox