History Main / RetroactivePreparation

26th Sep '17 1:06:44 AM Ferot_Dreadnaught
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** She's also the [[Pantheon/TimeAndSpace current Trope Goddess.]]
25th Sep '17 11:55:57 PM PaulA
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** So does ''The Man Who Folded Himself'' by David Gerrold, the time traveler using it even to get "immortal".

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** * So does ''The Man Who Folded Himself'' ''Literature/TheManWhoFoldedHimself'' by David Gerrold, the time traveler using it even to get "immortal". "immortal".
3rd Jul '17 2:47:24 PM john_e
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* {{Subverted|Trope}} in the ''Literature/DoctorWhoNewAdventures''. The Doctor walks up to a fridge, and proclaims "This fridge will be full of delicious food: in the future I will travel back in time and put it there." He opens the fridge; it's almost empty. "I forgot," he adds.
1st Jul '17 9:20:48 PM MrItty
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** Taken advantage of by Missy in [[Recap/DoctorWhoS36E12TheDoctorFalls "The Doctor Falls"]]. When her [[TheNthDoctor previous incarnation]] reveals that his/their TARDIS is inoperable due to a broken piece of [[AppliedPhlebotinum Phlebotinum]], she invokes this trope. She throws said previous incarnation against the wall, and claims that she "remembers" a very scary lady once throwing her against the wall and forced her/him to promise to always carry a spare piece of that Phlebotinum at all times. The promise made, she then reaches into her own pocket to reveal that she now has the exact piece of Phlebotinum they need.
16th Jun '17 10:44:54 PM nombretomado
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* Not only is it used in ''[[BillAndTedsExcellentAdventure Bill & Ted's Excellent Adventure]]'', it's practically elevated to a martial art in ''Bill & Ted's Bogus Journey'', where the climax has both the titular heroes and their nemesis making use of this trope [[spoiler: before pointing out that only the ''winner'' of the showdown can actually make use of it]].

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* Not only is it used in ''[[BillAndTedsExcellentAdventure Bill & Ted's Excellent Adventure]]'', ''Film/BillAndTedsExcellentAdventure'', it's practically elevated to a martial art in ''Bill & Ted's Bogus Journey'', ''Film/BillAndTedsBogusJourney'', where the climax has both the titular heroes and their nemesis making use of this trope [[spoiler: before pointing out that only the ''winner'' of the showdown can actually make use of it]].
13th Mar '17 5:05:44 PM AthenaBlue
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** Because of this rule, The Doctor was able to save River Song in "Forest of the Dead".
** This is also the Doctor's only recourse in "Blink", not so much helping himself as helping Sally Sparrow defeat the Weeping Angels in 2007 because they sent him back to the 1960s without the TARDIS.



** Used in the Series 5 finale "The Big Bang", repeatedly, where we first see the Doctor show up and give random orders, leave, come back a second later, give more, and repeat a few times. Later, we see it from the other side, and learn he's doing this in real time in the future as he figures out what he needed to have already have happened. Thanks to the TimeyWimeyBall in that universe, he probably can't rely on things he's going to do later, so going back and retroactively doing them the instant before he needs them is safer.

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** This is the Doctor's only recourse in [[Recap/DoctorWhoS29E10Blink "Blink"]], not so much helping himself as helping Sally Sparrow defeat the Weeping Angels in 2007 because they sent him back to 1969 without the TARDIS.
** Because of this rule, the Doctor was able to save River Song in [[Recap/DoctorWhoS30E9ForestOfTheDead "Forest of the Dead"]].
** Used in the Series 5 finale [[Recap/DoctorWhoS31E13TheBigBang "The Big Bang", Bang"]], repeatedly, where we first see the Doctor show up and give random orders, leave, come back a second later, give more, and repeat a few times. Later, we see it from the other side, and learn he's doing this in real time in the future as he figures out what he needed to have already have happened. Thanks to the TimeyWimeyBall in that universe, he probably can't rely on things he's going to do later, so going back and retroactively doing them the instant before he needs them is safer.



** Straight-up depended upon by the Doctor in [[Recap/DoctorWho2011RedNoseDaySpecialSpaceAndTime the Red Nose Day special "Space"]]:
--> '''Amy:''' You don't know [[ContextSensitiveButton which lever]]?
-->'''Doctor:''' No, but I'm about to find out.
--> ''He gestures dramatically towards a door from which a future Doctor immediately enters the scene.''
--> '''Future Doctor:''' The [[InherentlyFunnyWords wibbly]] [[TechnoBabble lever]]!
** Taken to ridiculous levels in "The Day of the Doctor" where the Doctor pulls off a thousand-year preparation in order to [[spoiler:save Gallifrey by placing it in a time lock]].

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** Straight-up depended upon by the Doctor in [[Recap/DoctorWho2011RedNoseDaySpecialSpaceAndTime the Red Nose Day special "Space"]]:
--> '''Amy:'''
"Time"]]:
--->'''Amy:'''
You don't know [[ContextSensitiveButton which lever]]?
-->'''Doctor:'''
lever]]?\\
'''The Doctor:'''
No, but I'm about to find out.
--> ''He
out.\\
''[He
gestures dramatically towards a door from which a future Doctor immediately enters the scene.''
-->
]''\\
'''Future Doctor:''' The [[InherentlyFunnyWords wibbly]] [[TechnoBabble lever]]!
** Taken to ridiculous levels in [[Recap/DoctorWho50thASTheDayOfTheDoctor "The Day of the Doctor" Doctor"]], where the Doctor pulls off a thousand-year preparation in order to [[spoiler:save Gallifrey by placing it in a time lock]].lock]].
* ''Series/KamenRiderDouble'' has an odd variation on this. The Yesterday Dopant has the power to make someone do whatever they were doing [[ExactlyWhatItSaysOnTheTin exactly 24 hours ago]]. When Double shows up to fight it, Yesterday specifically baits him into actions that, when affected by Yesterday's power the next day, will cause him to try and assassinate a public figure.
* Averted in ''Series/SevenDays'', when the Russians manage to get their time travel technology off the ground thanks to Olga. Unfortunately, the technology is controlled by a rogue Russian general who proceeds to kill the Russian president and take power, intending to use the Sphere to prevent any attempts to remove him from power. Parker manages to "backstep" and stop the Russian program before their first jump. Interestingly, Olga previously worked on another Russian time travel program, which did not bear fruit but got her recruited into the Backstep program.



* Averted in ''Series/SevenDays'', when the Russians manage to get their time travel technology off the ground thanks to Olga. Unfortunately, the technology is controlled by a rogue Russian general who proceeds to kill the Russian president and take power, intending to use the Sphere to prevent any attempts to remove him from power. Parker manages to "backstep" and stop the Russian program before their first jump. Interestingly, Olga previously worked on another Russian time travel program, which did not bear fruit but got her recruited into the Backstep program.
* ''Series/KamenRiderDouble'' has an odd variation on this. The Yesterday Dopant has the power to make someone do whatever they were doing [[ExactlyWhatItSaysOnTheTin exactly 24 hours ago]]. When Double shows up to fight it, Yesterday specifically baits him into actions that, when affected by Yesterday's power the next day, will cause him to try and assassinate a public figure.
20th Dec '16 7:19:03 AM DaibhidC
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* We will never know for sure, but this appears to be what's going on in the surviving fragment of ''Literature/TheSalmonOfDoubt'', with a number of things making a lot more sense if you assume [[spoiler: that a Dirk Gently from the future is making sure present Dirk ends up in the right place]].
5th Oct '16 5:34:48 PM Morbuss
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* ''VideoGame/NaziZombies'' has a doozy, which doubles as a StableTimeLoop. The crew of Dempsey, Takeo, Nikolai and Richtofen save a girl stuck in an alternate dimension using ancient replicas of magical staffs in 1917. Over the course of several years they then endeavor to save their own souls as child-versions for a world free of evil. This pure world is then infested with evil, which the heroes then defeat; [[spoiler:only for the deity of the world to attempt to erase them from existance, before dumping them in a 'corner of time alongside some other random stuff'. Said point in time ends up being the war where they build magical staffs to fend off the evil, thus creating the very moment that they were drawn to in the first place.]] Since the staffs were explicitly ''replicas'' modelled after the originals, they knew [[spoiler:they needed to make the originals themselves.]]
28th Sep '16 12:55:52 AM Morgenthaler
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* ''IrregularWebcomic'' [[http://www.irregularwebcomic.net/2367.html accomplishes this]] and ensures a StableTimeLoop at the same time.

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* ''IrregularWebcomic'' ''Webcomic/IrregularWebcomic'' [[http://www.irregularwebcomic.net/2367.html accomplishes this]] and ensures a StableTimeLoop at the same time.
25th Apr '16 11:13:35 AM erforce
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* ''VideoGame/TimeSplitters: Future Perfect'' had numerous examples of this. One of the earliest examples is also one of the most memorable - you are given a key by your future self that you need to progress, and later pass the key on to your past self, [[TemporalParadox leaving its initial existence unexplained]]. FridgeLogic also sets in when you consider the fact that ''one'' key is being infinitely passed from Cortez to Cortez, meaning it'll probably wear down and break at some point.
* In ''{{Achron}}'' this is a very basic tactic. If your base is attacked, you can go back and build defenses in preparation.
* Subverted in ''{{Singularity}}'', where the player receives advice from the future in the form of time-reversed chalk marks on the walls. You'd think that would be a huge help, but they wind up not helping because whoever wrote them has/will-have-gone completely bonkers from excessive time travel and can't explain anything coherently enough for the messages to be helpful at the time you receive them.

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* ''VideoGame/TimeSplitters: Future Perfect'' ''VideoGame/TimeSplittersFuturePerfect'' had numerous examples of this. One of the earliest examples is also one of the most memorable - you are given a key by your future self that you need to progress, and later pass the key on to your past self, [[TemporalParadox leaving its initial existence unexplained]]. FridgeLogic also sets in when you consider the fact that ''one'' key is being infinitely passed from Cortez to Cortez, meaning it'll probably wear down and break at some point.
* In ''{{Achron}}'' ''VideoGame/{{Achron}}'' this is a very basic tactic. If your base is attacked, you can go back and build defenses in preparation.
* Subverted in ''{{Singularity}}'', ''VideoGame/{{Singularity}}'', where the player receives advice from the future in the form of time-reversed chalk marks on the walls. You'd think that would be a huge help, but they wind up not helping because whoever wrote them has/will-have-gone completely bonkers from excessive time travel and can't explain anything coherently enough for the messages to be helpful at the time you receive them.
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http://tvtropes.org/pmwiki/article_history.php?article=Main.RetroactivePreparation