History Retcon / LiveActionTV

** In "[[Recap/DoctorWhoS9E3TheSeaDevils The Sea Devils]]", the Doctor points out that the cave creatures from ""[[Recap/DoctorWhoS7E2DoctorWhoAndTheSilurians Doctor Who and the Silurians]]" " should have, in fact, been named the "Eocenes" instead of the "Silurians," because of the epoch they originated from, which is the real-life author (same for both stories) correcting his earlier mistake when he was called on it after the broadcast of the first story. Unfortunately, it's highly unlikely that that they could have come from the Eocene period, either.

** The episode [[DoctorWhoS22E4TheTwoDoctors The Two Doctors]] was an attempt by Creator/RobertHolmes to retcon the early eras of the show. The [[LooseCanon loosely canonical]] "Season 6B"--which claims that the Doctor wasn't regenerated at the end of [[DoctorWhoS6E7TheWarGames The War Games]], but was sent by the Time Lords on various missions around the cosmos--is actually less insane than what Robert Holmes [[http://drwhointerviews.wordpress.com/category/robert-holmes/ was planning!]] Robert Holmes figured that it was impossible for the Time Lords to just lose track of a TARDIS, so in reality the Doctor had been working for them from the very beginning! This also explains why the first and second Doctors were never able to control the destination of the TARDIS. Holmes said that after the events of "The War Games" the Doctor's superiors let the Doctor take the fall for his interference, even though he had been acting on their orders.

*** The series itself at least tries to avert the numbering controversy arising from this retcon by having the 11th Doctor point out that his John Hurt incarnation renounced the name of the Doctor, feeling that he didn't deserve that title after what he did in the Time War. Thus, while he was the ninth ''incarnation'' of our favourite Time Lord, he ''wasn't'' the ninth ''Doctor''. (Although, confusingly, the end credits name him "The War Doctor".)
** "[[Recap/DoctorWhoS13E5TheBrainOfMorbius The Brain of Morbius]]" displays the faces of previous incarnations of the Doctor at one point, including several others in addition to those of the first three Doctors. These were retconned to have been Morbius's previous incarnations just a handful of stories later in "The Deadly Assassin", in which the Fourth Doctor informs Borusa that he's only had three '[[UnusualEuphemism face lifts]]', and in which the twelve-regeneration limit was established.

** In "[[Recap/DoctorWhoS9E3TheSeavDevils The Sea Devils]]", the Doctor points out that the cave creatures from ""[[Recap/DoctorWhoS7E2DoctorWhoAndTheSilurians Doctor Who and the Silurians]]" " should have, in fact, been named the "Eocenes" instead of the "Silurians," because of the epoch they originated from, which is the real-life author (same for both stories) correcting his earlier mistake when he was called on it after the broadcast of the first story. Unfortunately, it's highly unlikely that that they could have come from the Eocene period, either.

** TNG's pilot, "Encounter at Farpoint", implied that the Ferengi were known for eating sentient beings. This was never brought up again.

** The revelation made late in ''Series/StarTrekDeepSpaceNine'' that Dr. Bashir is a genetically engineered superhuman causes numerous conflicts with earlier episodes, and basically makes him an awful person through FridgeLogic. For instance, the episode reveals that he could win every game of darts against O'Brien. Not only does this make their entire friendship seem like a farce, since playing darts is the chief activity they're seen enjoying together, but it contradicts the episode "Visionary" where O'Brien's foreknowledge of where Bashir's darts are going to hit was used to show that he had really been to the future. Then the episode "Distant Voices" is centered around an alien probing his mind and drawing out his deepest secrets, but him knowing himself to be the product of illegal genetic engineering never comes up.
** Taking this further, if one revisits the Season 2 TNG episode "Unnatural Selection", where the Darwin station scientists are engineering perfect humans, those scientists are doing something wholly criminal (by any measure several orders of magnitude worse than what Julian's parents did) and really should have been taken into custody by Picard. This is somewhat mitigated by the The Lost Era Novel (The Buried Age) which revealed Darwin station was to be used as a test case to explore the field despite fear that it would spiral out of control.
** ''Series/StarTrekTheNextGeneration'' has a revelation that excessive warp speeds are causing holes in spacetime (in an {{Anvilicious}} [[AnAesop Aesop]] about pollution and the environment), which prompts the Federation to limit ships to Warp 5. Characters in a couple of subsequent episodes pay lip service to the "speed limit" right before they break it, but after that it is forgotten completely, with the general FanWank being that an improved version of the Warp Drive that didn't mess up subspace was invented. May also apply to what ought to be the inevitable ramifications of a new technology or application thereof, such as retrieving a heretofore-disintegrated crew member out of the pattern buffers of the transporter. In Peter David's ''StarTrekNewFrontier'' novels, there's an offhand reference from a character who can "see" spacetime about the damage still being done by warp travel. This got so noted that fanfiction writers No-Prized it, coming up with the dual ideas of the ruts worn in spactime healing over a period of time and simply changing your routes to avoid cumulative Spatial Fatigue.

** The two-part ''Series/StarTrekVoyager'' episode, "Year Of Hell", plays [[CosmicRetcon retconning literally]]. The BigBad has developed a weapon that lets him ''use'' retcons to change the timeline (while he himself is protected by AppliedPhlebotinum). He first uses it to reverse a stunning defeat to his species... Only to discover he's accidentally retconned his beloved wife and daughter out of existence. He keeps trying. (Also provides a handy ResetButton: evidently, destroying his ship undoes all his [=Retcons=], and RammingAlwaysWorks).
** And then there's the question of currency, specifically whether the Federation uses any during the 23rd century. There is at least one mention of a crewmember "earning their pay" in a TOS episode, though that might have only been a colloquialism Kirk was using. In "The Trouble with Tribbles", we see what clearly looks like trade with a human salesman - it's hard to imagine that guy was just in the business of giving away these critters for free. Then by ''The Voyage Home'' Kirk has a quote about people in the 20th century "still using money", implying that they don't anymore. You might think that they stopped using money at some point between TOS and the fourth movie, but the tone and reactions in the scene seem to indicate the ''Enterprise'' crew is ''completely unfamiliar with the concept of currency'' - so the change wouldn't have occurred in their lifetime. [[ContinuitySnarl And then]], a later movie has [=McCoy=] snark that he'd give "real money" to have the movie's villain stop talking, possibly indicating that [=McCoy=] - generally shown to be an older, more curmudgeonly figure than Kirk - witnessed the changeover while Kirk had missed it. And of course, by the TNG era, they pretty much beat us over the head with the fact that the Federation doesn't use money anymore (except for outside trades with other species, especially the Ferengi). ''Enterprise'' seems to hint that currency was abandoned when the Federation was first formed, a few years after the end of that series, but it's very vague about it. And then, to add further confusion, the 2009 movie has a scene that takes place in a bar, on Earth, that clearly seems to operate on capitalistic principles (not to mention the Nokia phone in Kirk's uncle's car). Now, ''that movie takes place in an alternate timeline'', but since the two timelines diverged on the day of Kirk's birth, it would mean that even in the original one, currency was still legal tender at least until that day. To sum it up, it seems like we're now just meant to vaguely accept that they've phased money out by the 24th century without asking too many questions about how they did it or the precise moment when they did.

** In ''Space Seed'', the Eugenics Wars (set during the 1990s) was mentioned by Spock to be in the "era of your last so called World War". In the Next Generation era, World War III is said to happen at least five decades later. Additionally, author Greg Cox, who wrote several Trek novels set during the Eugenics Wars era, observed that the passage of the real 1990s necessitated reimagining the Eugenics Wars as a less overt conflict that happened around real life events and may not have been known to the general public. The episode where the Voyager crew visited the 90s did not depict an Earth embroiled in a world wide conflict with genetic supermen. Cox also humorously noted (in one of the DVD extras in ''Wrath of Khan'') that Khan didn't exactly appear on the cover of Time Magazine.

* Parodied in ''Literature/TheConditionsOfGreatDetectives'' when, in the final episode, Banzo finds out his family has been completely rewritten without his knowledge. Originally his estranged wife was Japanese and they had a teenage daughter, Hanako [[spoiler:who commited suicide]]. His new wife wants to get back together with him and run a restaurant together, she's also blonde and non-Japanese - and their new daughter (who has another name) is a lot younger and also blonde. Banzo compares the family photograph his "new wife" gave him and compares it to the photograph of the "old family" he carries in his wallet.

** In "The Sea Devils," the Doctor points out that the cave creatures from "Doctor Who and the Silurians" should have, in fact, been named the "Eocenes" instead of the "Silurians," because of the epoch they originated from, which is the real-life author (same for both stories) correcting his earlier mistake when he was called on it after the broadcast of the first story. Unfortunately, it's highly unlikely that that they could have come from the Eocene period, either.

** NuWho Series 7 and the 50th Anniversary Special "Day of the Doctor" managed to retcon in an entire new Doctor. When it was revealed that a secret hidden Doctor, played by John Hurt, existed, fan theories melted down the Internet (including on this very wiki) as to who he really was. One fan theory that was roundly rejected was that he was the Doctor who fought in the Time War and destroyed both his planet and people and the Daleks as well, thus the epic guilt that caused him to try and forget that persona. The problem there was that the Doctor had spoken frequently about his involvement in the war, and the action he took to destroy both sides, leaving himself as the sole survivor, and the massive guilt he feels. None of that was a secret, so why would the body he used to do it in be one? Of course, once the fiftieth anniversary special aired, it turned out that that was indeed who John Hurt's Doctor was, meaning that every line of dialogue establishing that Christopher Eccleston's Doctor was the ninth, David Tennant's the tenth, Matt Smith's the eleventh, etc., were all lies that the Doctor was telling so that he could try and forget the version of himself that committed the heinous act that he had no trouble talking about in all three of his subsequent forms. On the other hand, the 10th Doctor's line about regenerating "half a dozen times" since the last time he saw Sarah Jane has a new meaning now: he didn't forget about the events of "The Five Doctors" after all.

** "The Brain of Morbius" displays the faces of previous incarnations of the Doctor at one point, including several others in addition to those of the first three Doctors. These were retconned to have been Morbius's previous incarnations just a handful of stories later in "The Deadly Assassin", in which the Fourth Doctor informs Borusa that he's only had three '[[UnusualEuphemism face lifts]]', and in which the twelve-regeneration limit was established.
** The Doctor has blue AlienBlood in "State of Decay", but normal red blood ever before and normal red blood ever after.

** Both Spike and Angel had their ages changed. For Spike it happened ''twice''. He went from "barely 200" in ''School Hard'', to 126 in ''The Initiative'', to 120 in ''Fool for Love''. Angel had 29 years added to his age in the episode ''Becoming.''
** A minor example concerning Anya's demon friend Halfrek. She was played by Kali Rocha who had appeared in another episode as Cecily, one of Spike's human love interests. In her next episode when she and Spike appeared on screen together they had Halfrek say "William?" and then the two avoided each other's gaze, implying Halfrek and Cecily to be the same person. Also Halfrek's flashback scene in "Selfless" was changed from the Renaissance to the Russian Revolution to support this.

** Flashback episodes were particularly egregious with this, resulting in the internal history that makes little sense. In the first episode, after Rachel flees from her wedding and first encounters Monica and Ross it's implied she hasn't seen them in years, and that she and Monica were little more than casual acquaintances growing up. Later flashback episodes portrayed Monica and Rachel as practically being best friends in high school, attending prom and parties together, and Rachel spending Thanksgiving at the Geller home.

** Season 1's "The Stranger" retcons a crucial event from the Pilot: It was originally established that Emma had been sent through the wardrobe alone, given that neither Charming nor one of Regina's {{Mooks}} who was present at the time indicated seeing a second person inside. In "The Stranger", we learn that Pinocchio was sent through as well.

* In ''Series/{{Friends}}'', Ross is shown in later episodes as having a long standing passion for dinosaurs, that stretches back to childhood. However, in the first season, he states he only picked paleontology as his major on a dare.
** ''Friends'' did this more and more with each flashback, resulting in the internal history making little sense. In the first episode, Rachel backs out of her wedding and it turns out she hasn't seen Monica or Ross in a very long time. None of the other characters recognize her, but importantly, Chandler doesn't. But in Season 3, it's told Chandler actually met Rachel just a year before her wedding day, and actually wanted to sleep with her. Then it happens that they met even earlier than that when Rachel was still in High School. This means that when Rachel met Chandler briefly in the Season 3 flashback, she didn't recognize him, or she didn't want her friends to know she knew him. Even worse, yet another flashback episode ("The One Where the Stripper Cries") would reveal that Chandler and Rachel actually hooked up during a college party.
** An early episode also had a statement by Rachel that seemed to imply she met Chandler at Phoebe's birthday party! Luckily, the phrasing is ambiguous enough that it could also mean she met Chandler in the first episode as was initially assumed.
** ''Friends'' was notoriously bad at doing more harm than good with their retconning, as the episode The One Where Chandler Can't Cry goes to show. The entire premise of the episode was (in typical ''Friends'' fashion) exactly what it said on the tin. Only, Chandler was easily the most emotional of the boys, and had several earlier episodes revolving around this fact. He had the same thing happen with his [[CompressedVice sudden and crippling fear of dogs.]] The same episode that introduced Chandler's dog phobia also reveals that Ross hates ice cream... despite the fact that a past episode (The One After the Super Bowl) shows him just fine with eating it.
** Also, in "The One With the Prom Video", it's clear that Chandler had never seen Fat Monica or pre-nose job Rachel, but in a later episode he was retconned into meeting them...and actually ''caused'' Monica to lose weight!
** Then in 'The One With The Sharks' it's brought up that Phoebe has never been in a relationship that lasted longer than a month, or lived with a partner, both of which happened at previous points in the series. While the whole living with a guy issue can be brushed off due to the fact Phoebe broke up with him after one night of living together, another episode had a boyfriend of Phoebe's mentioning that they have been together over a month. Phoebe also once mentioned, nearer the end of the series, that she had never been married before. She technically had - she married a Canadian man who [[spoiler:she thought]] was gay so he could get a green card.
** In yet another late season episode, it's suggested (through a throwaway line) that Ross got drunk and slept with the cleaning lady as a teenager. Really puts his constant whining during the first two seasons about Carol being his first and, until the start of Season Two, ''only'' sexual partner in a new light, doesn't it?

** The revelation made late in ''Series/StarTrekDeepSpaceNine'' that Dr. Bashir is a genetically engineered superhuman causes numerous conflicts with earlier episodes, and basically makes him an awful person through FridgeLogic. For instance, the episode reveals that he could win every game of darts against O'Brien. Not only does this make their entire friendship seem like a farce, since playing darts is the chief activity they're seen enjoying together, but it contradicts the episode "Visionary" where O'Brien's foreknowledge of where Bashir's darts are going to hit was used to show that he had really been to the future. Then the episode "Distant Voices" is centered around an alien probing his mind and drawing out his deepest secrets, but him knowing himself to be the product of illegal genetic engineering never comes up. Taking this further, if one revisits the Season 2 TNG episode "Unnatural Selection", where the Darwin station scientists are engineering perfect humans, those scientists are doing something wholly criminal (by any measure several orders of magnitude worse than what Julian's parents did) and really should have been taken into custody by Picard. The TLE Novel The Buried Age retcon this to be a test case to explore the field despite fear that it would spiral out of control.

** The revelation made late in ''Series/StarTrekDeepSpaceNine'' that Dr. Bashir is a genetically engineered superhuman causes numerous conflicts with earlier episodes, and basically makes him an awful person through FridgeLogic. For instance, the episode reveals that he could win every game of darts against O'Brien. Not only does this make their entire friendship seem like a farce, since playing darts is the chief activity they're seen enjoying together, but it contradicts the episode "Visionary" where O'Brien's foreknowledge of where Bashir's darts are going to hit was used to show that he had really been to the future. Then the episode "Distant Voices" is centered around an alien probing his mind and drawing out his deepest secrets, but him knowing himself to be the product of illegal genetic engineering never comes up. Taking this further, if one revisits the Season 2 TNG episode "Unnatural Selection", where the Darwin station scientists are engineering perfect humans, those scientists are doing something wholly criminal (by any measure several orders of magnitude worse than what Julian's parents did) and really should have been taken into custody by Picard.

* ''Series/OnceUponATime does this with the ''{{Disney/Frozen}}'' mythology - despite following the continuity of the movie almost directly. Anna and Elsa's mother (renamed from Idun to Gerda) is revealed to have two sisters Ingrid and Helga. [[spoiler: Ingrid had ice powers like Elsa and accidentally killed Helga with them. As a result Gerda sealed Ingrid inside an urn]] and got the trolls to erase her sisters from the memory of everyone in Arendelle. This is also implied to be how the parents knew about the trolls (through Gerda) whereas the movie implies that the king was the one who knew.

* ''Series/OnceUponATime'' normally has very good continuity. However when [[Disney/TheLittleMermaid Ursula]] is featured, she's described as a sea goddess that's implied to be benevolent. The winter finale of season 4 retcons her into a witch with evil intentions, but her upcoming backstory episode may very well shine light on this.
** The show does this with the ''{{Disney/Frozen}}'' mythology - despite following the continuity of the movie almost directly. Anna and Elsa's mother (renamed from Idun to Gerda) is revealed to have two sisters Ingrid and Helga. [[spoiler: Ingrid had ice powers like Elsa and accidentally killed Helga with them. As a result Gerda sealed Ingrid inside an urn]] and got the trolls to erase her sisters from the memory of everyone in Arendelle. This is also implied to be how the parents knew about the trolls (through Gerda) whereas the movie implies that the king was the one who knew.

* ''Franchise/SuperSentai'' did this to its own canon.
** Originally, ''Series/HimitsuSentaiGoranger'' and ''Series/JAKQDengekitai'' were not part of the Super Sentai canon that was established with ''Series/BattleFeverJ'' and made notable when ''Series/KousokuSentaiTurboranger'' was stated as the eleventh team and that there were ten before them with Battle Fever J being the first. However, when ''Series/ChourikiSentaiOhRanger'' was labeled at the 19th and not the 17th when the series was introduced, it meant that Goranger and J.A.K.Q. were put back in retroactively. Toei was not Legally able to count Goranger and JAKQ as part of the greater Sentai canon due to the nature of who was responsible for and involved in production; Goranger and JAKQ under Shotaro Ishinomori and his company; whereas Battle Fever J and a couple series following it had limited partnership with Marvel Comics. But they were able to clear up such licensing issues in the 90's, thus were able to finally include them.
** As well, each Sentai series was considered a standalone series, with each crossover movie considered non-canon. When ''Series/KaizokuSentaiGokaiger'' came out, it was established that ''all'' Sentai series existed in the same world. This also retroactively made the World of Shinkenger in ''Series/KamenRiderDecade'' the World of Super Sentai.

** Trills make their first appearance in an episode of ''Series/StarTrekTheNextGeneration'' ("The Host"). Here, the symbiont clearly has total control over the host body and considers transporters to be harmful. In ''Series/StarTrekDeepSpaceNine'', the makeup is completely different (mainly because they didn't want to ruin Terry Farrell's looks with a {{rubber forehead|aliens}}), the host and symbiont create a combined personality, and use of transporters does not appear to be an issue. Additionally, Trills are virtually unheard of in their introductory episode, making TheReveal of Odan's true nature a surprise, while in [=DS9=] they're indicated to have been a known quality for ages, with Sisko having been mentored by Curzon Dax, and Jadzia Dax remembering a sexual encounter with Dr [=McCoy=].

* ''Series/TheWestWing'' In s3e5 'On The Day Before', President Bartlett vetos the repeal of the 'death tax'. This is made up to be a huge deal, as it is an election year, and you don't vote against taxes in an election year, but it is considered 'shooting the moon', as it is supposed to be something that Bartlett has never done before, the Veto. However, in s2e4 'In This White House', during Ainsely and Sams debate on Capital Beat, it is mentioned by Mark Godfreed that Bartlett veto'ed the Republican education package.

* ''Series/TheBradyBunch'': Events and characters that occurred in the ''Brady'' SpinOff ''TheBradyBunchVarietyHour'' are retconned by the time ''The Brady Brides'' make it to air; as such, none of the events in the ill-fated variety series are considered canon.

** ''Series/PowerRangersNinjaStorm'' originally indicated that it wasn't part of previous ''PowerRangers'' continuity, but their [[ReunionShow team-up]] with ''Series/PowerRangersDinoThunder'' (and before that, the 500th episode "Legacy of Power") shoved it back in.

** Also, the ages of the original Rangers were 16-17 as evidenced by the fact that they drive cars. The original finale "Doomsday" would see the rangers battle and defeat Rita and give up their powers and go to a prom. However, based on the popularity of the show, Saban altered the episode to not be a finale and leave room for more story. The prom part was cut out and the Rangers were retconned to being 14-15 in order to keep them around longer.

** ''[[Series/PowerRangersMegaforce Power Rangers Super Megaforce]]'' essentially retconned the Sentai series from before ''Series/KyoryuSentaiZyuranger'' as well as the suits from ''Series/GoseiSentaiDaiRanger'' as just powers that weren't brought to Earth.

** ''Series/PowerRangersNinjaStorm'' originally indicated that it wasn't part of previous ''PowerRangers'' continuity, but their [[ReunionShow team-up]] with ''Series/PowerRangersDinoThunder'' shoved it back in.
** ''Series/MightyMorphinPowerRangers'' has one when it came replacing Rangers. In season 2 when Jason, Trini, and Zack had to leave the team needed to acquire a [[MacGuffin special sword]] to transfer their powers to Rocky, Aisha, and Adam, but in the following season when Kimberly need to give her powers to Kat she was handed her power coin away.
** Also the ages of the original Rangers where 16-17 this is evidenced by the fact that they drive cars. The original finale "Doomsday" would see the rangers battle and defeat Rita and give up their powers and go to Prom. However based on the popularity of the show Saban altered the episode to not be a finale and leave room for more story. The prom part was cut out and the Rangers were retconned to being 14-15 in order to keep them around longer.

** ''[[Series/PowerRangersMegaforce Power Rangers Super Megaforce]]'' essentially retconned the Sentai series from before ''Series/KyoryuSentaiZyuranger'' as well as the suits from ''Series/GoseiSentaiDaiRanger'' as just powers that just weren't brought to Earth.
** "[[Series/PowerRangersSamurai Power Rangers Samurai]]" Retconned the previous season, RPM, out of continuity with every other power ranger series, and this was originally intended to be done to Every Disney-Era show until the production Staff saw what was going on with Gokaiger and had to backpedal on going through with it. Suffice to say, Fans did not take it well when "Clash of the Red Rangers" aired. The Reason behind this is because Jonathan Tzachor Publicly stated he hated the Disney era shows and wanted to disregard them. He also has tried to say that *EVERY* Power rangers season is out-of-canon with each other after "In Space" outside of the crossovers.

** Also done well in Spike's introduction. He expresses anger that Angel has gone good, saying, "You were my sire, my Yoda, man!" Angel doesn't elaborate on this at the time. Later it's seen that it was Drusilla who actually turned Spike into a vampire while Angelus was his teacher and role model. In another episode Spike outright says, "Drusilla may have made me a vampire, but you made me a monster." Creator/JossWhedon also gave the explanation at one point that 'sire' can refer to any of the predecessors of a vampire's line and not just immediate sire.

** In the final episode of ''Series/StarTrekTheOriginalSeries'', "[[Recap/StarTrekS3E24TurnaboutIntruder Turnabout Intruder]]", Dr. Janice Lester pulls a GrandTheftMe on Kirk to break through the glass ceiling, because even in the utopian future of ''Star Trek'', women were apparently barred from service as starship captains. This embarrassing piece of 1960s male chauvinism was retconned out by attributing it to the delusions of a mentally unstable woman, despite Kirk's explicit on-screen acceptance of both the accuracy of her accusations, and the injustice of the policy.

** And then there's the question of currency, specifically whether the Federation uses any during the 23rd century. There is at least one mention of a crewmember "earning their pay" in a TOS episode, though that might have only been a colloquialism Kirk was using. In "The Trouble with Tribbles", we see what clearly looks like trade with a human salesman - it's hard to imagine that guy was just in the business of giving away these critters for free. Then by ''The Voyage Home'' Kirk has a quote about people in the 20th century "still using money", implying that they don't anymore. You might think that they stopped using money at some point between TOS and the fourth movie, but the tone and reactions in the scene seem to indicate the ''Enterprise'' crew is ''completely unfamiliar with the concept of currency'' - so the change wouldn't have occurred in their lifetime. And of course, by the TNG era, they pretty much beat us over the head with the fact that the Federation doesn't use money anymore (except for outside trades with other species, especially the Ferengi). ''Enterprise'' seems to hint that currency was abandoned when the Federation was first formed, a few years after the end of that series, but it's very vague about it. And then, to add further confusion, the 2009 movie has a scene that takes place in a bar, on Earth, that clearly seems to operate on capitalistic principles (not to mention the Nokia phone in Kirk's uncle's car). Now, ''that movie takes place in an alternate timeline'', but since the two timelines diverged on the day of Kirk's birth, it would mean that even in the original one, currency was still legal tender at least until that day. To sum it up, it seems like we're now just meant to vaguely accept that they've phased money out by the 24th century without asking too many questions about how they did it or the precise moment when they did.
** Trills make their first appearance in an episode of ''Series/StarTrekTheNextGeneration'' ("The Host"). Here, the symbiont clearly has total control over the host body and considers transporters to be harmful. In ''Series/StarTrekDeepSpaceNine'', the makeup is completely different (mainly because they didn't want to ruin Terry Farrell's looks with a {{rubber forehead|aliens}}), the host and symbiont create a combined personality, and use of transporters does not appear to be an issue.

* ''Series/PowerRangersNinjaStorm'' originally indicated that it wasn't part of previous ''PowerRangers'' continuity, but their [[ReunionShow team-up]] with ''Series/PowerRangersDinoThunder'' shoved it back in.

*** It isn't necessarily a retcon, as the coins being used at that time were not the same as the ones used when Jason, Zack and Trini left. Those coins had been made thousands of years prior. The coin Kimberly gave to Kat, as well as the coins the other Rangers were using at that time, had been made more recently. So, they may have had different rules for them then the original coins.

** "[[Series/PowerRangersSamurai Power Rangers Samurai]]" Retconned the previous season, RPM, out of continuity with every other power ranger series, and this was originally intended to be done to Every Disney-Era show until the production Staff saw what was going on with Gokaiger and had to backpedal on going through with it. Suffice to say, Fans did not take it well when "Clash of the Red Rangers" aired.
*** They liked it even less when Super Megaforce further enforced the Retcon.
*** The Reason Behind this is Jonathan Tzachor Publicly stated he hated the Diensy era shows and wanted to disregard them. He also has tried to say that *EVERY* Power rangers season is out-of-canon with each-other after "In Space" outside of the crossovers. It's this opinion about Continuity that has informed a general western misconception about Super Sentai's Own take on such, which is elaborated on further down the page, as he has tried to use Toei's policies as justifications on his own. Absolutely no-one buys it, as Toei never did that with Sentai.

* In the same vein as the Disney Animated Canon, ''Franchise/SuperSentai'' did this to its own canon. Originally, ''Series/HimitsuSentaiGoranger'' and ''Series/JAKQDengekitai'' were not part of the Super Sentai canon that was established with ''Series/BattleFeverJ'' and made notable when ''Series/KousokuSentaiTurboranger'' was stated as the eleventh team and that there were ten before them with Battle Fever J being the first. However, when ''Series/ChourikiSentaiOhRanger'' was labeled at the 19th and not the 17th when the series was introduced, it meant that Goranger and J.A.K.Q. were put back in retroactively.
** Reason is Before that, Toei was not Legally able to count Goranger and JAKQ as part of the greater Sentai canon due to the nature of who was responsible for and involved in production; Goranger and JAKQ under Shotaro Ishinomori and his company; whereas Battle Fever J and a couple series following it had limited partnership with Marvel Comics. But they were able to clear up such licensing issues in the 90's, thus were able to finally include them.

*** This is actually a Western Fandom Misconception; the Sentai "vs" movies the above refers to were never considered noncanon by Toei, and there were events and specials preceding such movies (going back into the 70's AND 80's) which made very clear every series was in canon with each-other, just not mentioned so as to tell their story without having to worry about the continuity of the preceding ones. There's a difference between "Standalone" and "Separate".

*** The Reason Behind this is Jonathan Tzachor Publicly stated he hated the Diensy era shows and wanted to disregard him. The man also has tried to say that *EVERY* Power rangers season is out-of-canon with each-other after "In Space" outside of the crossovers. It's this opinion about Continuity that has informed a general western misconception about Super Sentai's Own take on such, which is elaborated on further down the page, as he has tried to use Toei's policies as justifications on his own. Absolutely no-one buys it, as Toei never did that with Sentai.

*** This is actually a Western Fandom Misconception; the Sentai "vs" movies the above refers to were never considered noncanon by Toei, and there were events and specials preceding such movies which made very clear every series was in canon with each-other, just not mentioned so as to tell their story without having to worry about the continuity of the preceeding ones. There's a difference between "Standalone" and "Separate".

* A cross-series Retcon occurred between ''{{Cheers}}'' and ''{{Frasier}}''. In a late Cheers episode, Frasier remarks that his father is dead and was a scientist in life, two things that are clearly not true in ''Frasier'' - it was explained as being the result of Frasier and Martin's relationship being quite cold at the time.