History Main / ReversePolarity

7th Dec '17 5:52:08 PM nombretomado
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* ''[[DefenseOfTheAncients Dota 2]]'' has a literal Reverse Polarity spell, which sucks opponents in and stuns them. This spell is used by a nonmagical rhino warrior from a tribal society. How or why Magnus can "alter the properties of matter" is not explained, although it's implied that his horn has something to do with it.

to:

* ''[[DefenseOfTheAncients ''[[VideoGame/DefenseOfTheAncients Dota 2]]'' has a literal Reverse Polarity spell, which sucks opponents in and stuns them. This spell is used by a nonmagical rhino warrior from a tribal society. How or why Magnus can "alter the properties of matter" is not explained, although it's implied that his horn has something to do with it.
9th Jul '17 4:46:34 PM Gideoncrawle
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''[[[{{Beat}} odd look]]]''\\
'''Harley Quinn:''' I don't know... but it always works on ''[[Franchise/StarTrek Star Quest]]''.

to:

''[[[{{Beat}} odd look]]]''\\
''[odd look]''\\
'''Harley Quinn:''' I don't know... but it always works on ''[[Franchise/StarTrek Star Quest]]''.''Star Quest''.
9th Jul '17 3:30:16 AM Arivne
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9th Jul '17 2:42:20 AM Arivne
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[[folder:Other Sites]]
* ''Wiki/SCPFoundation'', [[http://scp-wiki.net/scp-674 SCP-674 ("The Exposition Gun")]]. When a Foundation doctor tested SCP-674 by firing it at a TV show or movie featuring the cast of ''Series/StarTrekTheOriginalSeries'', Spock reversed the polarity of a phaser and shot him with it, killing him.
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Added DiffLines:

* ''Wiki/SCPFoundation'', [[http://scp-wiki.net/scp-674 SCP-674 ("The Exposition Gun")]]. When a Foundation doctor tested SCP-674 by firing it at a TV show or movie featuring the cast of ''Series/StarTrekTheOriginalSeries'', Spock reversed the polarity of a phaser and shot him with it, killing him.
9th Jul '17 2:41:12 AM Arivne
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* In the 1960's ''Series/{{Batman}}'' episode "Better Luck Next Time", Batman reverses the polarity on his belt communicator in order to create an ultrasonic signal to drive away a tiger. It was shown on March 17th, 1966, thus preceding both both the ''Series/StarTrekTheOriginalSeries'' and ''Film/BatmanTheMovie'' examples.

to:

* In the 1960's ''Series/{{Batman}}'' episode "Better Luck Next Time", Batman reverses the polarity on his belt communicator in order to create an ultrasonic signal to drive away a tiger. It was shown on March 17th, 1966, thus preceding both both the ''Series/StarTrekTheOriginalSeries'' and ''Film/BatmanTheMovie'' examples.



* In the second season ''Series/TheManFromUNCLE'' episode "The Minus-X Affair", THRUSH scientist Lillian Stemmler is developing a pair of drugs. One ("Plus-X") heightens the senses of the recipient to an almost superhuman degree. The other ("Minus-X") is intended to incapacitate its victims. And how is Minus-X made? Obviously:

to:

* ''Series/TheManFromUNCLE''
**
In the second season ''Series/TheManFromUNCLE'' episode "The Minus-X Affair", THRUSH scientist Lillian Stemmler is developing a pair of drugs. One ("Plus-X") heightens the senses of the recipient to an almost superhuman degree. The other ("Minus-X") is intended to incapacitate its victims. And how is Minus-X made? Obviously:



* ''Series/MightyMorphinPowerRangers'':
** In the episode "Opposites Attract", the [[RoBeast magnet-themed]] ''monster'' did this trick to sabotage the Rangers' weapons. He could also cause a "polarity switch" for individual people and Angel Grove as a whole. What this actually meant apparently involved a ScreenShake and some storm effects.
** In a later episode, Zordon commands Billy to reverse the polarity of a ''cloud''. To make it rain. And it works.



* ''Series/TheOuterLimits1963'' episode "The Borderland". During the experiments to reach the other dimension, the scientists reverse the polarity of a magnetic field in order to send objects to the other side and reverse them. Since the episode was first aired on December 10th, 1963, it predates all other known examples.



* ''Series/MightyMorphinPowerRangers'':
** In the episode "Opposites Attract", the [[RoBeast magnet-themed]] ''monster'' did this trick to sabotage the Rangers' weapons. He could also cause a "polarity switch" for individual people and Angel Grove as a whole. What this actually meant apparently involved a ScreenShake and some storm effects.
** In a later episode, Zordon commands Billy to reverse the polarity of a ''cloud''. To make it rain. And it works.
9th Jun '17 11:47:49 PM Piterpicher
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* The 1963 movie ''Son of {{Flubber}}'' features a rain machine that does not work until they reverse the polarity.

to:

* The 1963 movie ''Son of {{Flubber}}'' Film/{{Flubber}}'' features a rain machine that does not work until they reverse the polarity.
23rd Apr '17 4:18:40 PM nombretomado
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* In ''TransformersVictory'', Braver invents a device that can detect Decepticon brainwaves. During the inevitable battle, he is able to drive them off by actually reversing the polarity.

to:

* In ''TransformersVictory'', ''Anime/TransformersVictory'', Braver invents a device that can detect Decepticon brainwaves. During the inevitable battle, he is able to drive them off by actually reversing the polarity.
12th Mar '17 11:04:17 AM AthenaBlue
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* One of the earliest television uses was in a 1965 episode of ''Series/MyFavoriteMartian''. Martin tries it as he repairs the transmitter that works with his antennae.
* ''Series/{{Space 1999}}'': in "Black Sun", the Bergman invents an innovative protective shield which ''reverses'' the 'pressure' of the Black Sun, instead of just negating it. How reversing differs from negating is not explained.
* Similarly, the cast of ''Series/MysteryScienceTheater3000'' once attempted to shake an alien monster off the satellite with a polarity-reversal maneuver; theirs involved an actual car battery and jumper cables. Also, the alien liked it.

to:

* One of In the earliest television uses was in a 1965 1960's ''Series/{{Batman}}'' episode of ''Series/MyFavoriteMartian''. Martin tries it as he repairs "Better Luck Next Time", Batman reverses the transmitter that works with polarity on his antennae.
* ''Series/{{Space 1999}}'':
belt communicator in "Black Sun", order to create an ultrasonic signal to drive away a tiger. It was shown on March 17th, 1966, thus preceding both both the Bergman invents an innovative protective shield which ''reverses'' ''Series/StarTrekTheOriginalSeries'' and ''Film/BatmanTheMovie'' examples.
* Paul Chuckle is always using this in ''Series/{{Chucklevision}}''. At one point he reverses
the 'pressure' polarity of the Black Sun, instead of just negating it. How reversing differs from negating is not explained.
* Similarly, the cast of ''Series/MysteryScienceTheater3000'' once attempted
a UV light (which helps plants grow) to shake an alien monster off the satellite with a polarity-reversal maneuver; theirs involved an actual car battery and jumper cables. Also, the alien liked it.shrink his brother Barry.



* ''Series/StarTrekTheOriginalSeries''
** In the episode "[[Recap/StarTrekS3E17ThatWhichSurvives That Which Survives]]", Spock orders Scotty to reverse the polarity of a "magnetic probe"; Scotty responds with an incredulous "reverse polarity?!"
** In the episode "[[Recap/StarTrekS2E13Obsession Obsession]]", Spock once did this by "cross-circuiting to B". Same thing.
* ''Series/StarTrekTheNextGeneration''
** In the episode "[[Recap/StarTrekTheNextGenerationS2E13TimeSquared Time Squared]]", [[MrFixit Lt. LaForge]] and [[MrExposition Lt. Cmdr Data]] must ''literally'' reverse the polarity of a shuttlepod's power supply in order to activate its internal systems. Even adjusting the flow of power must be done in reverse from what they're used to. Of course, this is due to [[spoiler: the shuttle being from six hours into their future. As they approach the moment when the shuttle was thrown back in time, the shuttle (and the 'Future' Picard) begin to respond normally.]]
--->'''[=LaForge=]''': What happened?
--->'''Data''': The polarity was not compatible.
--->'''[=LaForge=]''': Not possible, the connection is idiot proof.
--->'''Data''': The power requirements of the shuttle do not match the Enterprise. We are going to need a variable phase inverter.
--->''Later, after hooking everything up backwards:''
--->'''[=LaForge=]''': By all rights, this connection should overload all the shuttle's circuits.
--->It doesn't.
** Episode "[[Recap/StarTrekTheNextGenerationS1E2TheNakedNow The Naked Now]]". Near the end of the episode the Enterprise crew needs an extra minute so they can repair their engines in order to escape an incoming object. [[CreatorsPet Wesley Crusher]] reverses the power leads on the ship's TractorBeam to turn it into a repulsor beam to push off another ship and give them the time they need.
* In the ''Series/StarTrekDeepSpaceNine'' episode "[[Recap/StarTrekDeepSpaceNineS04E09TheSwordOfKahless The Sword of Kahless]]", Worf suggests reversing the polarity to get past the force field protecting the title object. Dax says, "That helped a little".
* ''Series/StarTrekVoyager'':
** In the episode "[[Recap/StarTrekVoyagerS5E2Drone Drone]]", Janeway and Seven of Nine thought they could fry a Borg tractor beam by reversing the polarity of Voyager's phaser banks; it looked on-screen like it was about to work, and instead their own phaser array was knocked out.
** In a variation of this trope, ''Voyager'' worked around a cloud of warp field-dampening neutron radiation by simply "inversing" the warp field. ("[[Recap/StarTrekVoyagerS6E11FairHaven Fair Haven]]")
--->'''Website/{{SFDebris}}''': I mean it's got "Inverse" in there! It's the opposite of it! The neutron radiation probably makes it work even ''better'' than before!
** Memory Alpha records a total of at least five instances in which this order was given on the show. In three instances, it was helpful; in two, it was not.
* In ''Series/StarTrekEnterprise'', used almost word for word by [[LauncherOfAThousandShips Malcolm Reed]] in the episode "Harbinger", when he reversed the polarity on the plasma coils to knock out an alien.
** {{Justified}} in the pilot when they reversed the polarity of magnetic latches to get a structure to come apart.
* ''Series/StargateSG1'':
** {{Lampshade|Hanging}}d when Carter's analogue on the parallel show "Wormhole X-treme!" attempts to solve all problems by reversing the polarity.
** Carter did actually get her homemade [[AppliedPhlebotinum naqadah]] reactor working by reversing the polarity of a [[{{Unobtanium}} trinium]] plate in "[[Recap/StargateSG1S3E5LearningCurve Learning Curve]]". "Reversing the polarity" sounded more professional than "aw shit I put it in backwards".
** And in "[[Recap/StargateSG1S10E6200 200]]", during a ''Franchise/StarTrek'' parody, Mitchell as TheCaptain asks Carter to reverse the polarity in an overly dramatic manner.



** As mentioned above. After a long time of deliberately ''not'' using the phrase, the Tenth Doctor once said it as a ContinuityNod.

to:

** As mentioned above. After a long time of deliberately ''not'' using the phrase, the Tenth Doctor once [[Recap/DoctorWhoS29E6TheLazarusExperiment once]] said it as a ContinuityNod.



** ''Doctor Who'' also provides a rare example of polarity reversal ''not'' working. When Nyssa and Tegan are rapidly aged every time the Doctor tried to take off the ship in ''Mawdryn Undead'' due to... something or other, the Fifth Doctor attempts to reverse the polarity of the neutron flow. This only causes them to de-age into children. [[MST3KMantra Try not to think about it.]]
** An incident with the Fourth Doctor about turning a chicken turning into an egg, and it wasn't a failure--he was making a point about the technology. ItMakesSenseInContext.
** Parodied in the new-series episode "The Almost People". An [[spoiler: exact duplicate of the Eleventh Doctor, called a 'ganger']] is created. As he tries to process the Doctor's multiple regenerations, he goes a little weird; at one point he says the "neutron flow" variety, only a few lines later to say, using Four's voice; "Would you like a [[TrademarkFavoriteFood jellybaby]]?" and then, in Eleven's voice, ''"Reverse the jellybaby of the neutron flow!"''

to:

** An incident with the Fourth Doctor about turning a chicken turning into an egg, and it wasn't a failure -- he was making a point about the technology. ItMakesSenseInContext.
** ''Doctor Who'' also provides a rare example of polarity reversal ''not'' working. When Nyssa and Tegan are rapidly aged every time the Doctor tried to take off the ship in ''Mawdryn Undead'' [[Recap/DoctorWhoS20E3MawdrynUndead "Mawdryn Undead"]] due to...to . . . something or other, the Fifth Doctor attempts to reverse the polarity of the neutron flow. This only causes them to de-age into children. [[MST3KMantra Try not to think about it.]]
** An incident with the Fourth Doctor about turning a chicken turning into an egg, and it wasn't a failure--he was making a point about the technology. ItMakesSenseInContext.
** Parodied in the new-series episode "The Almost People". An [[spoiler: exact duplicate of the Eleventh Doctor, called a 'ganger']] is created. As he tries to process the Doctor's multiple regenerations, he goes a little weird; at one point he says the "neutron flow" variety, only a few lines later to say, using Four's voice; "Would you like a [[TrademarkFavoriteFood jellybaby]]?" and then, in Eleven's voice, ''"Reverse the jellybaby of the neutron flow!"''
]]



** "The Day of the Doctor" has a big love letter to this trope. The Tenth and Eleventh Doctors try to do this at the same time to a time vortex, only for nothing to happen. The Tenth realizes that their screwdrivers are cancelling each other out: "I'm reversing it and you're reversing it ''back'' again...we're ''confusing'' the polarity!"
** The use of the phrase was lampshaded in "The Girl Who Died" when the Twelfth Doctor actually claims that the phrase is ''meaningless''.
** "Hell Bent:" When Clara finds out the Doctor has a device [[spoiler:he's planning to use to erase her memory of him so that she can survive without the Time Lords finding her]], she uses his sonic sunglasses to reverse the polarity so that it would affect him instead. When she tells him this, he realizes [[MyGodWhatHaveIDone what a horrible thing he was about to do]], but ''someone'' still needs to get hit with the device (because Clara and the Doctor are too dangerous to travel together). Since he's not actually sure if she succeeded in reversing the polarity, or if that would even do anything to the device, he suggests they both hold it and activate it, [[LaserGuidedKarma and let karma take its course]]. They do, [[spoiler:and the Doctor has all his memories of Clara erased. He still remembers their adventures, reconstructing them from the "Clara-shaped hole" in his memories, but he fails to recognize her even when he meets her again. He is then able to move on without her]].
* ''Series/SpaceCases'': Catalina is having some trouble with the concept from her textbook. "Reverse the polarity of the neutron flow? What's that all about?" Aren't {{shout out}}s fun? Later in the episode, she sarcastically suggests reversing the polarity as a solution to their problem... and is shocked to find out that it actually ''is'' a legitimate solution.
* Paul Chuckle is always using this in ''Series/{{Chucklevision}}''. At one point he reverses the polarity of a UV light (which helps plants grow) to shrink his brother Barry.

to:

** Parodied in the new-series episode [[Recap/DoctorWhoS32E6TheAlmostPeople "The Almost People"]]. An [[spoiler: exact duplicate of the Eleventh Doctor, called a 'ganger']] is created. As he tries to process the Doctor's multiple regenerations, he goes a little weird; at one point he says the "neutron flow" variety, only a few lines later to say, using Four's voice; "Would you like a [[TrademarkFavoriteFood jellybaby]]?" and then, in Eleven's voice, ''"Reverse the jellybaby of the neutron flow!"''
** [[Recap/DoctorWho50thASTheDayOfTheDoctor
"The Day of the Doctor" Doctor"]] has a big love letter to this trope. The Tenth and Eleventh Doctors try to do this at the same time to a time vortex, only for nothing to happen. The Tenth realizes that their screwdrivers are cancelling each other out: "I'm reversing it and you're reversing it ''back'' again...we're ''confusing'' the polarity!"
** The use of the phrase was lampshaded in [[Recap/DoctorWhoS35E5TheGirlWhoDied "The Girl Who Died" Died"]] when the Twelfth Doctor actually claims that the phrase is ''meaningless''.
** [[Recap/DoctorWhoS35E12HellBent "Hell Bent:" Bent"]]: When Clara finds out the Doctor has a device [[spoiler:he's planning to use to erase her memory of him so that she can survive without the Time Lords finding her]], she uses his sonic sunglasses to reverse the polarity so that it would affect him instead. When she tells him this, he realizes [[MyGodWhatHaveIDone what a horrible thing he was about to do]], but ''someone'' still needs to get hit with the device (because Clara and the Doctor are too dangerous to travel together). Since he's not actually sure if she succeeded in reversing the polarity, or if that would even do anything to the device, he suggests they both hold it and activate it, [[LaserGuidedKarma and let karma take its course]]. They do, [[spoiler:and the Doctor has all his memories of Clara erased. He still remembers their adventures, reconstructing them from the "Clara-shaped hole" in his memories, but he fails to recognize her even when he meets her again. He is then able to move on without her]].
her]].
* ''Series/SpaceCases'': Catalina In ''Franchise/{{Emergency}}'', there is having some trouble a factory worker with his arm caught in a feeding hopper of a machine and Dr. Brackett is rushing over to have it amputated to save his life. However while he is en route, the paramedics come up with a better idea: they work with the concept from her textbook. "Reverse factory's engineers and rewire the machine to make the hopper work in reverse to free the worker instead. Just as Dr. Brackett arrives, the modification is finished and they are able to free him instantly.
* ''{{Series/Eureka}}'' solves a lot of problems this way.
** Blatantly and explicitly so in the season 3 finale, where [[spoiler:Carter must reverse the polarity of a device causing a magnetic anomaly that threatens the whole world, before it gets blown up by the Martha drone sent by Zane and Fargo.]]
* In ''{{Series/Fringe}}'', a device which creates wormholes had its polarity reversed, which, of course, reversed the flow of the wormhole!
* Spoofed in ''Series/KyleXY'', when Josh tells a drunken Kyle to sober up by "reversing the polarity of his liver". Kyle goes offscreen, vomits, and comes back sober, saying that he took Josh's advice. It's hard to say whether he was joking or not.
* Reversing
the polarity of the neutron flow? What's that all about?" Aren't {{shout out}}s fun? Later in Series/{{Lexx}}'s main drive causes an EMP of sufficient power to fry any circuits on or near the episode, she sarcastically suggests reversing the polarity as a solution to their problem... and is shocked to find out that it actually ''is'' a legitimate solution.
* Paul Chuckle is always using this in ''Series/{{Chucklevision}}''. At one point he reverses the polarity of a UV light (which helps plants grow) to shrink his brother Barry.
ship.



* Reversing the polarity of the Series/{{Lexx}}'s main drive causes an EMP of sufficient power to fry any circuits on or near the ship.

to:

* Reversing On ''Series/{{Moonlighting}}'' David and Maddie once claimed to have reversed the polarity of the Series/{{Lexx}}'s main drive causes viewers' TV sets, so they can register applause in order to vote on one of two ideas to make the show better. Maddie's idea was insightful drama, meaningful dialogue, and intelligent plots. David's was FanService. Guess which won.
* One of the earliest television uses was in a 1965 episode of ''Series/MyFavoriteMartian''. Martin tries it as he repairs the transmitter that works with his antennae.
* Similarly, the cast of ''Series/MysteryScienceTheater3000'' once attempted to shake
an EMP of sufficient power alien monster off the satellite with a polarity-reversal maneuver; theirs involved an actual car battery and jumper cables. Also, the alien liked it.
* Strangely enough used in ''Series/PersonOfInterest'', which normally takes the trouble
to fry get its tech right. Apparently this is all you need to do to turn a speaker into a microphone. While any circuits on or near the ship.speaker can in fact be used as a crude microphone (Yamaha NS-10 speakers are often reversed into kick drum microphones in recording circles), all you have to do is plug them into a recording device. No "polarity reversing" is necessary, which is good, because speakers and microphones are alternating-current devices with no fixed polarity.



* Spoofed in ''Series/KyleXY'', when Josh tells a drunken Kyle to sober up by "reversing the polarity of his liver". Kyle goes offscreen, vomits, and comes back sober, saying that he took Josh's advice. It's hard to say whether he was joking or not.
* ''{{Series/Eureka}}'' solves a lot of problems this way.
** Blatantly and explicitly so in the season 3 finale, where [[spoiler:Carter must reverse the polarity of a device causing a magnetic anomaly that threatens the whole world, before it gets blown up by the Martha drone sent by Zane and Fargo.]]



* In ''Series/{{Sliders}}'' Season 2, Episode 3: Gillian of the Spirts, Quinn (via a spirit medium, the titular Gillian) instructs Arturo how to fix the timer by reversing the polarity.



* In the 1960's ''Series/{{Batman}}'' episode "Better Luck Next Time", Batman reverses the polarity on his belt communicator in order to create an ultrasonic signal to drive away a tiger. It was shown on March 17th, 1966, thus preceding both both the ''Series/StarTrekTheOriginalSeries'' and ''Film/BatmanTheMovie'' examples.
* In ''Franchise/{{Emergency}}'', there is a factory worker with his arm caught in a feeding hopper of a machine and Dr. Brackett is rushing over to have it amputated to save his life. However while he is en route, the paramedics come up with a better idea: they work with the factory's engineers and rewire the machine to make the hopper work in reverse to free the worker instead. Just as Dr. Brackett arrives, the modification is finished and they are able to free him instantly.
* In ''Series/{{Sliders}}'' Season 2, Episode 3: Gillian of the Spirts, Quinn (via a spirit medium, the titular Gillian) instructs Arturo how to fix the timer by reversing the polarity.
* On ''{{Moonlighting}}'' David and Maddie once claimed to have reversed the polarity of the viewers' TV sets, so they can register applause in order to vote on one of two ideas to make the show better. Maddie's idea was insightful drama, meaningful dialogue, and intelligent plots. David's was FanService. Guess which won.
* Strangely enough used in ''Series/PersonOfInterest'', which normally takes the trouble to get its tech right. Apparently this is all you need to do to turn a speaker into a microphone. While any speaker can in fact be used as a crude microphone (Yamaha NS-10 speakers are often reversed into kick drum microphones in recording circles), all you have to do is plug them into a recording device. No "polarity reversing" is necessary, which is good, because speakers and microphones are alternating-current devices with no fixed polarity.
* In ''{{Series/Fringe}}'', a device which creates wormholes had its polarity reversed, which, of course, reversed the flow of the wormhole!

to:

* In ''Series/{{Space 1999}}'': in "Black Sun", the 1960's ''Series/{{Batman}}'' episode "Better Luck Next Time", Batman reverses Bergman invents an innovative protective shield which ''reverses'' the 'pressure' of the Black Sun, instead of just negating it. How reversing differs from negating is not explained.
* ''Series/SpaceCases'': Catalina is having some trouble with the concept from her textbook. "Reverse
the polarity on his belt communicator in order to create an ultrasonic signal to drive away a tiger. It was shown on March 17th, 1966, thus preceding both both the ''Series/StarTrekTheOriginalSeries'' and ''Film/BatmanTheMovie'' examples.
* In ''Franchise/{{Emergency}}'', there is a factory worker with his arm caught in a feeding hopper of a machine and Dr. Brackett is rushing over to have it amputated to save his life. However while he is en route, the paramedics come up with a better idea: they work with the factory's engineers and rewire the machine to make the hopper work in reverse to free the worker instead. Just as Dr. Brackett arrives, the modification is finished and they are able to free him instantly.
* In ''Series/{{Sliders}}'' Season 2, Episode 3: Gillian
of the Spirts, Quinn (via a spirit medium, neutron flow? What's that all about?" Aren't {{shout out}}s fun? Later in the titular Gillian) instructs Arturo how to fix episode, she sarcastically suggests reversing the timer polarity as a solution to their problem... and is shocked to find out that it actually ''is'' a legitimate solution.
* ''Series/StargateSG1'':
** {{Lampshade|Hanging}}d when Carter's analogue on the parallel show ''Wormhole X-treme!'' attempts to solve all problems
by reversing the polarity.
** Carter did actually get her homemade [[AppliedPhlebotinum naqadah]] reactor working by reversing the polarity of a [[{{Unobtanium}} trinium]] plate in [[Recap/StargateSG1S3E5LearningCurve "Learning Curve"]]. "Reversing the polarity" sounded more professional than "aw shit I put it in backwards".
** And in [[Recap/StargateSG1S10E6200 "200"]], during a ''Franchise/StarTrek'' parody, Mitchell as TheCaptain asks Carter to reverse the polarity in an overly dramatic manner.
* On ''{{Moonlighting}}'' David and Maddie ''Series/StarTrekTheOriginalSeries''
** In the episode "[[Recap/StarTrekS3E17ThatWhichSurvives That Which Survives]]", Spock orders Scotty to reverse the polarity of a "magnetic probe"; Scotty responds with an incredulous "reverse polarity?!"
** In the episode "[[Recap/StarTrekS2E13Obsession Obsession]]", Spock
once claimed did this by "cross-circuiting to have B". Same thing.
* ''Series/StarTrekTheNextGeneration''
** In the episode "[[Recap/StarTrekTheNextGenerationS2E13TimeSquared Time Squared]]", [[MrFixit Lt. LaForge]] and [[MrExposition Lt. Cmdr Data]] must ''literally'' reverse the polarity of a shuttlepod's power supply in order to activate its internal systems. Even adjusting the flow of power must be done in reverse from what they're used to. Of course, this is due to [[spoiler: the shuttle being from six hours into their future. As they approach the moment when the shuttle was thrown back in time, the shuttle (and the 'Future' Picard) begin to respond normally.]]
--->'''[=LaForge=]''': What happened?
--->'''Data''': The polarity was not compatible.
--->'''[=LaForge=]''': Not possible, the connection is idiot proof.
--->'''Data''': The power requirements of the shuttle do not match the Enterprise. We are going to need a variable phase inverter.
--->''Later, after hooking everything up backwards:''
--->'''[=LaForge=]''': By all rights, this connection should overload all the shuttle's circuits.
--->It doesn't.
** Episode "[[Recap/StarTrekTheNextGenerationS1E2TheNakedNow The Naked Now]]". Near the end of the episode the Enterprise crew needs an extra minute so they can repair their engines in order to escape an incoming object. [[CreatorsPet Wesley Crusher]] reverses the power leads on the ship's TractorBeam to turn it into a repulsor beam to push off another ship and give them the time they need.
* In the ''Series/StarTrekDeepSpaceNine'' episode "[[Recap/StarTrekDeepSpaceNineS04E09TheSwordOfKahless The Sword of Kahless]]", Worf suggests reversing the polarity to get past the force field protecting the title object. Dax says, "That helped a little".
* ''Series/StarTrekVoyager'':
** In the episode "[[Recap/StarTrekVoyagerS5E2Drone Drone]]", Janeway and Seven of Nine thought they could fry a Borg tractor beam by reversing the polarity of Voyager's phaser banks; it looked on-screen like it was about to work, and instead their own phaser array was knocked out.
** In a variation of this trope, ''Voyager'' worked around a cloud of warp field-dampening neutron radiation by simply "inversing" the warp field. ("[[Recap/StarTrekVoyagerS6E11FairHaven Fair Haven]]")
--->'''Website/{{SFDebris}}''': I mean it's got "Inverse" in there! It's the opposite of it! The neutron radiation probably makes it work even ''better'' than before!
** Memory Alpha records a total of at least five instances in which this order was given on the show. In three instances, it was helpful; in two, it was not.
* In ''Series/StarTrekEnterprise'', used almost word for word by [[LauncherOfAThousandShips Malcolm Reed]] in the episode "Harbinger", when he reversed the polarity on the plasma coils to knock out an alien.
** {{Justified}} in the pilot when they
reversed the polarity of the viewers' TV sets, so they can register applause in order to vote on one of two ideas to make the show better. Maddie's idea was insightful drama, meaningful dialogue, and intelligent plots. David's was FanService. Guess which won.
* Strangely enough used in ''Series/PersonOfInterest'', which normally takes the trouble
magnetic latches to get its tech right. Apparently this is all you need a structure to do to turn a speaker into a microphone. While any speaker can in fact be used as a crude microphone (Yamaha NS-10 speakers are often reversed into kick drum microphones in recording circles), all you have to do is plug them into a recording device. No "polarity reversing" is necessary, which is good, because speakers and microphones are alternating-current devices with no fixed polarity.
* In ''{{Series/Fringe}}'', a device which creates wormholes had its polarity reversed, which, of course, reversed the flow of the wormhole!
come apart.



* Reversing the polarity of energy sources was one of the many plot convenient things Penny's computer book could do on ''WesternAnimation/InspectorGadget''.
* IQ in the ''WesternAnimation/JamesBondJr'' cartoon also reverses the polarity all the time. He once took control of the bad guy's helicopter with a simple remote control and some polarity reversal.
** One episode had James himself perform probably the most ludicrous variation ever: In the beginning of the episode, James berates IQ for not fixing his digital watch which for some reason has started counting ''backwards''. Later, James is locked in a room with a doomsday device set to go off. What does he do? He uses some ''pieces of wire'' to ''connect the watch to the device's timer'' and lo and behold, the watch starts working normally ''and the timer starts counting backwards''.
* ''Franchise/{{Ghostbusters}}''

to:

* Reversing ''WesternAnimation/TheAmazingSpiez''. In "Operation The 50 Ft. Hacker" a device called the Super Soaker Supersizer has its polarity reversed to return Megan and Davey to normal size.
* In ''WesternAnimation/Ben10AlienForce'', this is required to get Ben's hand back from the Null Void after Sunder separates it from the rest of his body. ''WesternAnimation/Ben10UltimateAlien'''s episode "The Eggman Cometh" featured doctor Animo who used a DevolutionDevice to turn chicken into Pterodactyl-like creatures, then admitted under intimidation by Gwen that this trope is the way to fix everything.
* In ''WesternAnimation/DannyPhantom'', Danny uses reverse polarity on the Fenton Thermos to close a ghost portal.
-->'''Sam''': I'm impressed.
-->'''Danny''': (makes muscles) With my strength?
-->'''Sam''': No. That you knew what reverse polarity was.
* In ''WesternAnimation/DextersLaboratory: Ego Trip'', all that takes to turn Mandark's stupid dystopia into Dexter's brilliant utopia is to reverse
the polarity of energy sources was one the Neurotomic Protocore from negative to positive, with a button.
* Creator/{{Filmation}} 1960's versions of Franchise/DCUniverse heroes.
** ''Franchise/{{Batman}}'' episode "How Many Herring In A Wheelbarrow?". To stop the Joker's Solar Mirror from melting Gotham City, Batman must reverse the polarity
of the many plot convenient things Penny's computer book could do on ''WesternAnimation/InspectorGadget''.
* IQ in the ''WesternAnimation/JamesBondJr'' cartoon also
Master Electrodes powering it by hitting them simultaneously with Batarangs. Seriously.
** ''ComicBook/{{Hawkman}}'' episode "The Twenty Third Dimension". Hawkman's "quazer" is converted into a Dimension Ray by reversing its polarity.
** ''ComicBook/TheAtom'' episode "The House of Doom''. The Atom
reverses the polarity all the time. He once took control of the bad guy's helicopter with a simple remote control and some polarity reversal.
** One episode had James himself perform probably the most ludicrous variation ever: In the beginning of the episode, James berates IQ for not fixing his digital watch which for some reason has started counting ''backwards''. Later, James is locked in a room with a doomsday device set
miniature nuclear battery to go off. What does he do? He uses some ''pieces of wire'' to ''connect the watch to the device's timer'' and lo and behold, the watch starts working normally ''and the timer starts counting backwards''.
turn it into a SelfDestructMechanism.
* ''Franchise/{{Ghostbusters}}''''Franchise/{{Ghostbusters}}'':



* ''WesternAnimation/JusticeLeague'' episode "Secret Origins": Batman saves the day by "reversing the ion charge" on an alien ship (this also appeared on the first episode of ''Challenge of the {{WesternAnimation/Superfriends}}'', and very similarly).
* In the ''WesternAnimation/KimPossible'' episode "Clean Slate", reversing the polarity on a memory-enhancement device causes it to erase Kim's memories.
** The device adapted to [[MirrorMoralityMachine switch heroes and villains between good and evil]] is even called the "Reverse Polarizer".
* In ''WesternAnimation/TheTick Vs Reno, Nevada'', Arthur is asked to reverse the polarity on a fish magnet. He finds two cables, blue and red, and a box with two similar a big label saying "Observe Correct Polarity. Use AC current", and two colored sockets. Arthur puts the cables in the wrong sockets, which seems to work, despite the obvious AC current issue.
* In ''WesternAnimation/TheNewAdventuresOfSuperman'', reversing the polarity of an electric charge transferred the powers of the episode's villain (and some other guy) back to Superman... After they got them from him through an electric shock.
* This is the solution to many a kink in Jimmy's machines in ''JimmyNeutron'', whether it makes sense or not.
* In ''WesternAnimation/DextersLaboratory: Ego Trip'', all that takes to turn Mandark's stupid dystopia into Dexter's brilliant utopia is to reverse the polarity of the Neurotomic Protocore from negative to positive, with a button.



* In the very last episode of the original ''{{Transformers}}'' cartoon, "The Rebirth, Part 3", the heroes [[spoiler:derail Galvatron's plan and bring about a new Golden Age on Cybertron]] by reversing the polarity of Galvatron's rocket thruster.
** And in "Call of the Primitives", Grimlock manages to stop Tornedron, an energy-eating being, by reversing his energy polarity (by throwing a switch).
* In ''WesternAnimation/DannyPhantom'', Danny uses reverse polarity on the Fenton Thermos to close a ghost portal.
-->'''Sam''': I'm impressed.
-->'''Danny''': (makes muscles) With my strength?
-->'''Sam''': No. That you knew what reverse polarity was.
* In ''WesternAnimation/Ben10AlienForce'', this is required to get Ben's hand back from the Null Void after Sunder separates it from the rest of his body. ''WesternAnimation/Ben10UltimateAlien'''s episode "The Eggman Cometh" featured doctor Animo who used a DevolutionDevice to turn chicken into Pterodactyl-like creatures, then admitted under intimidation by Gwen that this trope is the way to fix everything.

to:

* ''WesternAnimation/TheHerculoids'' episode "Revenge of the Pirates". Zok does it with his laser EyeBeams to neutralize a force field.
* Reversing the polarity of energy sources was one of the many plot convenient things Penny's computer book could do on ''WesternAnimation/InspectorGadget''.
* IQ in the ''WesternAnimation/JamesBondJr'' cartoon also reverses the polarity all the time. He once took control of the bad guy's helicopter with a simple remote control and some polarity reversal.
** One episode had James himself perform probably the most ludicrous variation ever:
In the very last beginning of the episode, James berates IQ for not fixing his digital watch which for some reason has started counting ''backwards''. Later, James is locked in a room with a doomsday device set to go off. What does he do? He uses some ''pieces of wire'' to ''connect the watch to the device's timer'' and lo and behold, the watch starts working normally ''and the timer starts counting backwards''.
* This is the solution to many a kink in Jimmy's machines in ''JimmyNeutron'', whether it makes sense or not.
* Subverted in the Founding Zombies
episode of the original ''{{Transformers}}'' cartoon, "The Rebirth, Part 3", the heroes [[spoiler:derail Galvatron's plan and ''WesternAnimation/JohnnyTest''. When Johnny uses a ray gun to bring about the town's Founding Fathers back to life, [[AlwaysIdenticalTwins Susan (or Mary)]] attempt to stop them by "reversing the polarity" of the gun. However, because they weren't completely alive, it did nothing. Johnny then had them "reverse the reverse polarity thing" to bring back their mothers and "save" the day.
* In the ''WesternAnimation/JonnyQuestTheRealAdventures'' episode "DNA Doomsday", Hadji reverses the polarity of
a new Golden Age DNA blob monster, turning it into mush.
* ''WesternAnimation/JusticeLeague'' episode "Secret Origins": Batman saves the day by "reversing the ion charge"
on Cybertron]] by an alien ship (this also appeared on the first episode of ''Challenge of the {{WesternAnimation/Superfriends}}'', and very similarly).
* In the ''WesternAnimation/KimPossible'' episode "Clean Slate",
reversing the polarity of Galvatron's rocket thruster.
on a memory-enhancement device causes it to erase Kim's memories.
** And in "Call of The device adapted to [[MirrorMoralityMachine switch heroes and villains between good and evil]] is even called the Primitives", Grimlock manages to stop Tornedron, an energy-eating being, by reversing his energy polarity (by throwing a switch).
* In ''WesternAnimation/DannyPhantom'', Danny uses reverse polarity on the Fenton Thermos to close a ghost portal.
-->'''Sam''': I'm impressed.
-->'''Danny''': (makes muscles) With my strength?
-->'''Sam''': No. That you knew what reverse polarity was.
* In ''WesternAnimation/Ben10AlienForce'', this is required to get Ben's hand back from the Null Void after Sunder separates it from the rest of his body. ''WesternAnimation/Ben10UltimateAlien'''s episode "The Eggman Cometh" featured doctor Animo who used a DevolutionDevice to turn chicken into Pterodactyl-like creatures, then admitted under intimidation by Gwen that this trope is the way to fix everything.
"Reverse Polarizer".



* An episode of the ''WesternAnimation/MenInBlack'' Cartoon had a super-power giving device. How do you undo its effects? To paraphrase:
--> '''Alien 1''' "That would be very complex..."
--> '''Alien 2''' "Nah, just switch the wires in the bottom and use it again."
* In ''WesternAnimation/TheNewAdventuresOfSuperman'', reversing the polarity of an electric charge transferred the powers of the episode's villain (and some other guy) back to Superman... After they got them from him through an electric shock.



* Creator/{{Filmation}} 1960's versions of Franchise/DCUniverse heroes.
** ''Franchise/{{Batman}}'' episode "How Many Herring In A Wheelbarrow?". To stop the Joker's Solar Mirror from melting Gotham City, Batman must reverse the polarity of the Master Electrodes powering it by hitting them simultaneously with Batarangs. Seriously.
** ''ComicBook/{{Hawkman}}'' episode "The Twenty Third Dimension". Hawkman's "quazer" is converted into a Dimension Ray by reversing its polarity.
** ''ComicBook/TheAtom'' episode "The House of Doom''. The Atom reverses the polarity of a miniature nuclear battery to turn it into a SelfDestructMechanism.

to:

* Creator/{{Filmation}} 1960's versions ''WesternAnimation/StarWarsRebels'': In [[Recap/StarWarsRebelsS3E17DoubleAgentDroid "Double Agent Droid"]], Chopper gets remote-hacked by an Imperial specialist. Hera pays him back by [[spoiler:sending a massive burst of Franchise/DCUniverse heroes.
** ''Franchise/{{Batman}}'' episode "How Many Herring In A Wheelbarrow?". To stop
energy down the Joker's Solar Mirror from melting Gotham City, Batman must reverse the polarity of the Master Electrodes powering it by hitting them simultaneously with Batarangs. Seriously.
** ''ComicBook/{{Hawkman}}''
signal that he was using to control Chopper, blowing up his ship]].
* ''WesternAnimation/{{Superfriends}} 1973''/74
episode "The Twenty Third Dimension". Hawkman's "quazer" is converted into a Dimension Ray by reversing its polarity.
** ''ComicBook/TheAtom'' episode "The House of Doom''. The Atom
Shamon U". Professor Shamon reverses the polarity on his giant electromagnet to repel the Batmobile instead of a miniature nuclear battery to turn it attracting it.
* After Peach was accidentally transformed
into a SelfDestructMechanism.baby in an episode of ''Series/TheSuperMarioBrosSuperShow'', Mario and Luigi got her back to her true age by reversing the flow of the FountainOfYouth.



* ''WesternAnimation/TheAmazingSpiez''. In "Operation The 50 Ft. Hacker" a device called the Super Soaker Supersizer has its polarity reversed to return Megan and Davey to normal size.
* An episode of the ''WesternAnimation/MenInBlack'' Cartoon had a super-power giving device. How do you undo its effects? To paraphrase:
--> '''Alien 1''' "That would be very complex..."
--> '''Alien 2''' "Nah, just switch the wires in the bottom and use it again."
* Subverted in the Founding Zombies episode of ''WesternAnimation/JohnnyTest''. When Johnny uses a ray gun to bring the town's Founding Fathers back to life, [[AlwaysIdenticalTwins Susan (or Mary)]] attempt to stop them by "reversing the polarity" of the gun. However, because they weren't completely alive, it did nothing. Johnny then had them "reverse the reverse polarity thing" to bring back their mothers and "save" the day.
* In the ''WesternAnimation/JonnyQuestTheRealAdventures'' episode "DNA Doomsday," Hadji reverses the polarity of a DNA blob monster, turning it into mush.

to:

* ''WesternAnimation/TheAmazingSpiez''. In "Operation The 50 Ft. Hacker" a device called ''WesternAnimation/TheTick Vs Reno, Nevada'', Arthur is asked to reverse the Super Soaker Supersizer has its polarity reversed to return Megan on a fish magnet. He finds two cables, blue and Davey red, and a box with two similar a big label saying "Observe Correct Polarity. Use AC current", and two colored sockets. Arthur puts the cables in the wrong sockets, which seems to normal size.
work, despite the obvious AC current issue.
* An In the very last episode of the ''WesternAnimation/MenInBlack'' Cartoon had a super-power giving device. How do you undo its effects? To paraphrase:
--> '''Alien 1''' "That would be very complex..."
--> '''Alien 2''' "Nah, just switch
original ''{{Transformers}}'' cartoon, "The Rebirth, Part 3", the wires in the bottom heroes [[spoiler:derail Galvatron's plan and use it again."
* Subverted in the Founding Zombies episode of ''WesternAnimation/JohnnyTest''. When Johnny uses a ray gun to
bring the town's Founding Fathers back to life, [[AlwaysIdenticalTwins Susan (or Mary)]] attempt to stop them about a new Golden Age on Cybertron]] by "reversing the polarity" of the gun. However, because they weren't completely alive, it did nothing. Johnny then had them "reverse the reverse polarity thing" to bring back their mothers and "save" the day.
* In the ''WesternAnimation/JonnyQuestTheRealAdventures'' episode "DNA Doomsday," Hadji reverses
reversing the polarity of Galvatron's rocket thruster.
** And in "Call of the Primitives", Grimlock manages to stop Tornedron, an energy-eating being, by reversing his energy polarity (by throwing
a DNA blob monster, turning it into mush.switch).



* ''WesternAnimation/{{Superfriends}} 1973''/74 episode "The Shamon U". Professor Shamon reverses the polarity on his giant electromagnet to repel the Batmobile instead of attracting it.
* ''WesternAnimation/TheHerculoids'' episode "Revenge of the Pirates". Zok does it with his laser EyeBeams to neutralize a force field.
* After Peach was accidentally transformed into a baby in an episode of ''Series/TheSuperMarioBrosSuperShow'', Mario and Luigi got her back to her true age by reversing the flow of the FountainOfYouth.
25th Feb '17 1:12:45 PM nombretomado
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* The 2007 ''Film/OceansThirteen'' had BradPitt dismissing Don Cheadle's technobabble by saying, "Becomes magnetized, reverse polarization, I know."

to:

* The 2007 ''Film/OceansThirteen'' had BradPitt Creator/BradPitt dismissing Don Cheadle's technobabble by saying, "Becomes magnetized, reverse polarization, I know."
10th Feb '17 3:36:21 AM StarTropes
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* In the ''Series/StarTrekDeepSpaceNine'' episode "[[Recap/StarTrekDeepSpaceNineS04E09TheSwordOfKahless The Sword of Khalass]]", Worf suggests reversing the polarity to get past the force field protecting the title object. Dax says, "That helped a little".

to:

* In the ''Series/StarTrekDeepSpaceNine'' episode "[[Recap/StarTrekDeepSpaceNineS04E09TheSwordOfKahless The Sword of Khalass]]", Kahless]]", Worf suggests reversing the polarity to get past the force field protecting the title object. Dax says, "That helped a little".
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http://tvtropes.org/pmwiki/article_history.php?article=Main.ReversePolarity