Line #114 WritersCannotDoMath/LiveActionTV


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6	[[WritersCannotDoMath Bad mathematics]] in live-action TV.
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9	* ''Series/TwentyFour'': The first season takes place "two years to the day" after Jack Bauer led a covert strike in Yugoslavia during the 1999 Kosovo War. It is also a presidential election year, which the real 2001 wasn't.
10	* ''Series/ThirtyRock'': Liz somehow turns 35 one year, and 37 the next.
11	* On ''Series/AllMyChildren'', Kendall Hart was introduced in 1993 as Erica Kane's 16-year old daughter, who Erica gave birth to at nearly 15 years old. Erica and her mother, Mona, placed Erica's baby girl for adoption to the Harts. Since the storyline established Kendall as 16, this would've made her mother, Erica, in her early thirties. However, Erica had been older than that for at least a decade. Once the writers were called out on this, they quietly {{Ret Con}}ed Kendall's age from 16 to 22/23 years old some time later -- which was still pushing things, but [[WillingSuspensionOfDisbelief somewhat acceptably so]] (nonetheless, this didn't stop the writers from continuing to write Kendall like a bratty teenager who practically hugged her dolly at night). It also led to the classic example of UnderageCasting: The change meant that 16-year old Creator/SarahMichelleGellar was playing a twenty-something. However, all this rapid aging was undone when the character returned to the show in the form of Alicia Minshew six years later and Kendall's birth year was reverted back to what it originally was when she first appeared as a 16-year old girl in 1993.
12	* ''Series/{{All That}}'': There is a sketch in episode 108 (in this episode, the rapper Coolio is the musical guest), in which a mother (Lori Beth Denberg) and father (Tim Goodwin) and their son (Josh Server) and daughter (Katrina Johnson) are unpacking their groceries. In all of the groceries, they find prizes, such as a glow-in-the-dark decoder ring in the cereal, a toupee in the flour, a Jogman radio in the yogurt, and a diamond necklace in the cottage cheese. The father finds money in the lettuce. He finds a $5 bill, a quarter, a $1 bill, a cashier's check for $24.95, and another $5 ("What a head!"). Later, he also finds a dime. This is $36.30 altogether, but he says that the total is $52.43.
13	-->'''Mother:''' How much money ''did'' you find in that lettuce?
14	-->'''Father:''' Well, let's see...$52.33.
15	-->''(He takes a bite of the lettuce, and finds a dime.)''
16	-->'''Father:''' Oh, wait a minute! Hold on! $52.''4''3!
17	* ''Series/{{Andromeda}}'' once used the term "nano-millennia" to describe how long the ship's AI was trapped in a box. It was apparently meant to convey a great deal of subjective time based on how fast a computer processes things. However, the prefix nano means one billionth. From that, one "nano-millennium" is only about 31.5 seconds.
18	* Creator/RonaldDMoore's [[WatsonianVersusDoylist standard explanation]] for chronological inconsistencies in ''Series/{{Battlestar Galactica\|2003}}'' is that he's bad at math.
19	* ''Series/BigBadBeetleborgs'': Josh Baldwin only exists because of this trope; the show already had four main characters who were Beetleborg fans and worked at the comic store (Drew, Jo, Roland, and Heather)-exactly one for every main Beetleborg plus the White Blaster. Once the writers realized their mistake, they lampshaded it in the form of Heather's leg getting broken during Shadowborg's initial attack.
20	* ''Series/{{Bones}}'':
21	** In one episode, it's revealed that Brennan had a relationship with her advisor in Chicago when she was 24. In another episode, she's said to have been born in 1976 (backed up by the fact that she was two years old in 1978 when [[spoiler: her family went underground]] and again by stating she was in the class of 1994), and been working at the [[FictionalCounterpart Jeffersonian Institute]] since 1998 (when she would have been 21 or 22). In another episode, she talks about identifying bodies after the Branch Davidian siege. Which means that she was at least 23 by 1993.
22	** In another episode, Angela kept asking her co-workers to donate money to save a cute piglet from becoming bacon. She claimed doing this would cost $1500, yet if buying and rearing pigs cost that much, pork would cost a ''lot'' more than it does. A whole pig that's already dead costs [[http://www.obriensfamilyfarm.com/prices.html about half that]].
23	* ''Series/BoyMeetsWorld'' begins in the fall of 1993. Cory is 11 and in 6th grade, his older brother Eric is 15 and in 10th grade, and their little sister Morgan is 5 and in kindergarten. Next year/season, Cory is 12 and in 7th grade, Eric is 16 and in 11th grade, and Morgan is 6 and in 1st grade. So far, so good, right? Not quite. Towards the end of the second season, Cory is suddenly 13 and presumably in 8th grade, considering final exams were taken in a second season episode way before the finale. When the third season begins, Cory and his friends are 14 and in 9th grade, although Eric's aging process is still consistent (17 and in 12th grade). When Morgan suddenly re-appears, she's 8 and in 3rd grade. At the end of the third season, Cory, Shawn, and Topanga end the school year as 15-year-old 10th graders. Eric's age and grade, however, are still consistent (he graduates high school at 18, as he was supposed to). The fourth season begins with Cory, Shawn, and Topanga as 16-year-old 11th graders. Eric is an 18-year-old college reject who's trying to find his place in the world. Morgan's age and grade are ambiguous. The fifth season begins, and the aging process is fluid once again. Cory, Shawn, and Topanga are 17-year-olds in 12th grade, and Eric is a 19-year-old college freshman. Next year/season, Cory, Shawn, Topanga, and (new cast member) Angela are 18-year-old college freshmen, and Eric, Jack, and (new character) Rachel are college sophomores. The year/season after that, however, Eric, Rachel, and Jack are college seniors. Also, at the beginning of the seventh season, Morgan is suddenly thirteen and dating boys.
24	* ''Series/BuffyTheVampireSlayer'': Creator/JossWhedon has stated that he sucks at math. Among other things, Spike has miraculously managed to become younger with each passing season:
25	** In season two, he is stated by Giles to be "barely 200." In season four, Spike tells Willow that he's "only 126." Finally, in season five, "[[Recap/BuffyTheVampireSlayerS5E7FoolForLove Fool for Love]]" established Spike as having been changed into a vampire by Drusilla in 1880. As the episode was made in 2000, this would make him 120 in vampire years. We don't know precisely how old he was when he was vamped, but it's more than six and less than eighty.
26	** In Season 1 and 2, Angel is mentioned as being 240 and 241, respectively. Those seasons took place in 1997 and 1998, meaning he was born between 1756-1758 (depending on when his birthday is). However, the flashback in Becoming: Part II shows him being sired by Darla in 1753.
27	** Buffy herself has at least three different birth dates, although this is more about continuity than math. In a season 1 episode, we see her school details on a computer screen, with two different birthdates, in 1979 and 1980 (the screen display changes between cuts). Then her gravestones (in "[[Recap/BuffyTheVampireSlayerS1E10Nightmares Nightmares]]", and at the end of season 5) show her birth date as 1981. Besides this, she also said in a season 4 episode that her astrological sign was Capricorn on the cusp of Aquarius, which puts her birthday on or soon before January 19 (which does not fit either of the season 1 birthdays).
28	** In "[[Recap/BuffyTheVampireSlayerS3E1Anne Anne]]", Buffy is taken into a hell dimension where time passes very swiftly. The demons who run the dimension kidnap people from Los Angeles, and put them to work in the hell dimension. After many decades of work, the workers, aged beyond recognition, are returned to L.A., where they have only been missing for a day or two. We see maybe two dozen human workers in the hell dimension, and if each lasts (generously) about two days objective, the demons have to be kidnapping at least six people a day, and dumping about the same number of bodies. Unless there are multiple feeder sites for the hell dimension, which the evidence in the episode does not support, people are going to notice 6 people a day disappearing, even in L.A.
29	** In season 7, "[[Recap/BuffyTheVampireSlayerS7E7ConversationsWithDeadPeople Conversations With Dead People]]" dates itself as November 12. The next three episodes each pick up exactly where the last ended, and we only go through a couple of days, yet in the fourth of this series it's suddenly December.
30	** In "[[Recap/BuffyTheVampireSlayerS6E3AfterLife After Life]]", Spike tells Buffy she's been gone 147 days, or about 5 months. In later episodes, however, there are numerous references to her only having been gone about 3 months.
31	* ''Series/Charmed1998'':
32	** The show has a demon who appears every [[ArcNumber 1300 years on Friday the 13th (who conveniently shows up in the thirteenth episode of the series, looking to kill thirteen unmarried witches)]]. But in the seventh century AD, when he would have last appeared, our currently-used Gregorian calendar wasn't even a twinkle in Pope Gregory XIII's eye; in fact he wouldn't even be born for another 900 years or so. Was the demon's last appearance on the day that people at the time would have called Friday the 10th, or does he adjust his date of appearance to conform to the currently extant calendar (in which case he could theoretically be beaten by changing to a 31-month calendar in which every month has only twelve days at most)?
33	** The family tree seen in "Pardon My Past" states that the sisters' grandmother was born in 1937 and their mother in 1950 - meaning that Penny somehow had a daughter when she was twelve. There's also the episode "Witchstock" which shows a youthful Penny in 1967 (going by the family tree, that makes her thirty, which is okay) - but "That 70s Episode" showed her looking quite elderly in 1975.
34	** Just narrowly avoided with Leo's past life in the same episode. He's shown to be P. Baxter's lover in the 1920s (or at least Anton pretends to be him) when Leo's birth date is given as 1924. So Leo's past life has to have died and then been reborn pretty quickly. Possible but just barely.
35	** Paige's birthday is listed wrong on her gravestone in the alternate reality of "Centennial Charmed". The same episode hangs a lampshade on another maths related goof; Cole is retconned into turning a hundred, when a Season 3 episode alludes to him being 115. A demon serving his birthday cake says "I thought you were 117" - and gets blown up for it, implying Cole is sensitive about his age.
36	** Penny Halliwell's love life gets forgotten about by the writers. She's been engaged six times and married four. Her first husband was the one shown in Woodstock. Despite the many flashbacks to the sisters' childhoods and teen years, there's never any reference or sight of the five other suitors Penny had.
37	* You think a show that relies so heavily on {{Flashback}}s and [[TimeShiftedActor Time-Shifted Actors]] as ''Series/ColdCase'' would be free of this, right? Wrong! The conflicting data about the age of the most senior detective, Will Jeffries, was eventually {{lampshade\|Hanging}}d in sixth season episode "November 22nd":
38	-->'''Will:''' [talking about the day Kennedy was assassinated] I was playing touch football at recess.\
39	'''Scotty:''' Recess? I thought you were, like, forty-five when that happened.\
40	'''Lilly:''' No, you're thinking of when Lincoln was shot.\
41	'''Will:''' Keep it up. See what happens.
42	* ''Series/CriminalMinds'':
43	** In one episode, Aaron Hotchner recollects meeting his wife when she was a tenth grader and he a junior. The impetus for his memory is a yearbook: "Reflections 1987." If Hotch were a seventeen-year-old junior, that would make him born in 1970, and thus approximately 35 at the time of the episode. Previously, viewers were told that Hotch had been a prosecutor before joining the FBI. So, if he graduated high school at eighteen, then college at 22, then law school at 25, and immediately became a prosecutor, then maybe he could join the Bureau at 27. That gives him eight years to not only be promoted to the BAU, but to become the Unit Chief. Considering how hard the BAU is to get into, a fact which the show points out, that seems... unlikely.
44	** A year later, Agent Rossi is introduced. It's said that he last worked for the BAU ten years before, and that Hotch was on the team with him. Meaning that Hotch would have had to join the ''BAU'' at age 27, and thus the FBI itself decidedly earlier, meaning he would have to... oh, we give up.
45	** In a later episode, Hotch's medical chart lists him as being 43, four years older than his yearbook leads us to believe. Or maybe three years older, if it was his ''wife's'' yearbook.
46	* ''Franchise/{{Degrassi}}'', in all its incarnations, is ridiculous when it comes to this:
47	** In the 7th episode of the first season of ''Series/DegrassiJuniorHigh'', Wheels is said to be 14. He has a birthday in the 12th episode of that season. In the first episode of the 3rd season, he is said to be "almost 15", and stays that way until a month after the 11th episode of that season (which was most of a year after the first).
48	** Spike has baby Emma at the end of the second season of ''Series/DegrassiJuniorHigh'', which is the end of grade eight for Spike. So, when Spike graduates, Emma should be approximately four. At Spike's ten-year reunion in the first episode of ''Series/DegrassiTheNextGeneration'', Emma is only twelve. In fact Emma should have been ''five'' when Spike graduates, because of the extra year (below).
49	** In the first episode of ''Series/DegrassiTheNextGeneration'', the class reuniting is said to be the class of '91 -- even though the classes reuniting (yes, there are two classes reuniting for some reason) should be the classes of '92 and '93, respectively. The writers seemed to have based this off when ''Series/DegrassiHigh'' ended, not taking into account that it ended with the characters in years ten and eleven.
50	** At the time the original series was made, Ontario schools had an extra year in the college-preparatory track. This explains why most characters in the "School's Out" special are identified as 19, while [[spoiler: Caitlin]], who graduated a year early, is 18. The writers promptly forget this detail as Spike talks about Emma entering Junior Kindergarten, making her 4 while her mother is 18.
51	** After [[spoiler:J.T.]]'s death, he is said to have been born in 1990, making him sixteen at the oldest. He was in year twelve, in which you are normally seventeen or eighteen.
52	* ''Series/DoctorWho'':
53	** In the first episode of the series (1963's [[Recap/DoctorWhoS1E1AnUnearthlyChild "An Unearthly Child"]]), what is clearly supposed to be the quadratic formula is seen on a chalkboard in the background. However, the denominator is written as 2ab instead of the actual 2a.
54	** The Doctor's own age, on the rare occasions he mentions it, frequently changes by implausible increments (and at least once went ''down'', between the last time it was mentioned in the classic series and the first time it was mentioned in the revived series). Creator/StevenMoffat, the man in charge from 2010, has openly admitted that "in his mind", the Doctor has lost count and says 900 (bumped up to 1200 during the Eleventh Doctor's run) because it sounds coolest. Also from Moffat, "this is a man who logically should have no idea how old he is." Bumped up by the Twelfth Doctor to over 2000 ("I'm old enough to be your ''messiah''"); at least this time though we can account for several centuries spent on Trenzalore defending Christmas.
55	--->'''The Doctor:''' Uh, I dunno. I lose track. 1200 and something, I think, unless I'm lying. I can't remember if I'm lying about my age, that's how old I am.
56	** [[Recap/DoctorWhoS6E2TheMindRobber "The Mind Robber"]]: After hearing that a man wrote 5,000 words a week for 25 years, Zoe exclaims "but that's over half a million words." Technically, it is though, by 6 million.
57	** In [[Recap/DoctorWhoS27E8FathersDay "Father's Day"]], Rose travels back to November 1987, where we see her as a baby of about six months old (according to series 2's [[Recap/DoctorWhoS28E5RiseOfTheCybermen "Rise of the Cybermen"]]) — except there are repeated references to her being 19 in her first season, which starts in March 2005. If Rose is 19 in March 2005, then she must have been born between March 1985 and March 1986. If her father died in November 1987, then she ''should'' be a toddler aged either one or two. If her father died when she was six months old, than he should have died between September 1985 and September 1986. Rose being six months old in November 1987 would mean she was born in May 1987 and make her 17 and two months away from her 18[-[[superscript:th]]-] birthday in March 2005.
58	** In a kind of cross between this and ArtisticLicensePhysics, in [[Recap/DoctorWho2005CSTheChristmasInvasion "The Christmas Invasion"]], the Doctor's hand gets cut off. He can still regenerate it though, because he's still within the first fifteen hours of his regeneration cycle. Except that he arrived in London on Christmas Eve, while it was still light, and his hand gets cut off the next day, also during daylight hours. Christmas is only a few days after the Winter Solstice, and the night lasts longer than fifteen hours in London at that time.
59	** [[Recap/DoctorWho2007CSVoyageOfTheDamned "Voyage of the Damned"]]: It's stated that the conversion rate between British pounds and Sto credits is that 1 million pounds is roughly 50 million credits. Which means that the 5,000-credit phone bill that the Van Hoffs were so concerned they wouldn't be able to pay is roughly 100 pounds.
60	** [[Recap/DoctorWhoS30E1PartnersInCrime "Partners in Crime"]]: There are 1 million people taking Adipose pills. Miss Foster claims that, when she activates the device to turn them all into Adipose, they'll be celebrating "one million birthdays". Except that one person can create multiple Adipose, so there'd be a ''lot'' more than one million. By the time the machine is shut off, there are only 10,000 Adipose, which means that somehow 99% of the people taking the pill didn't produce a single Adipose, and the rest only produced one each before the process was halted.
61	** [[Recap/DoctorWhoS30E6TheDoctorsDaughter "The Doctor's Daughter"]]: The war between the humans and Hath has gone on for 700 generations, according to General Cobb. [[spoiler:It's later revealed that the entire war has supposedly only been going on for a ''week''. In the course of the roughly half a day of constant skirmishing the episode takes over, we only see one generation of clones being produced, which begs the question of how they could have burned through over 600 generations in less than a week.]]
62	** [[Recap/DoctorWhoS37E7Kerblam "Kerblam!"]]: Kandoka requires 10% of the workforce to be human (the rest can be automated). The antagonist's stated justification for his act of terrorism is that it means only 10% of humans get to have a job (the rest are unemployed). Those are two completely unrelated quantities (10% of my doughnuts are chocolate: does this mean that 10% of all my chocolate goodies are doughnuts?); the fact that the hole remains wide open and unacknowledged even by the Doctor herself suggests the writers didn't notice.
63	* ''Series/{{Elementary}}'': Not so a mathematic mistake so much as a slip in research:
64	** The episode "[[Recap/ElementaryS02E02SolveForX Solve for X]]" is about the unsolved [[https://en.wikipedia.org/wiki/P_versus_NP_problem P versus NP problem]] and the real-life million-dollar prize for its solution. A mathematician character correctly exposits that (in a nutshell) P-versus-NP is about whether or not any problem whose solution can be quickly verified by a computer (NP-type problems) can also be quickly solved by one (P-type). A tech CEO correctly explains how it's relevant to cyber-security because encryption involves creating NP-type problems.
65	** However, both characters imply that "solving" P-versus-NP would result in the ability to quickly solve NP-type problems (thus filling in large swaths of mathematics and ending cyber-security as we know it), which is far from correct. It's possible (in fact, likely) that P and NP are simply not the same set; any mathematician who proved this would still win the million (and some people's relieved thanks). Or maybe P and NP are the same, but proving it would only ''suggest the existence'' of a universal problem-solving algorithm, not necessary create it. Further, even if they found such an algorithm, it only need run in polynomial time. If the time it takes is proportional to the size of the problem raised to the millionth power, it's polynomial time, but no less computationally intractable. There is also a third possibility that the statement is unprovable.[[note]]Proving that it is unprovable would also be considered a solution to the Millennium Problem and win the one million dollars.[[/note]]
66	* Johnny Drama's age in ''Series/{{Entourage}}'' rises and falls between episodes. In some, he was in high school with Vincent, his younger brother, putting him at about three years older; in others he could drive and legally buy liquor while his brother was still in grade school.
67	* ''Series/{{Eureka}}'' has time travel between 2010 and 1947. The time travel is explicitly said to be possible only when an eleven-year solar flare cycle is at its peak. 63 years are between the two points, too many for five cycles but not enough for six. Solar cycles average at around 11 years. Six cycles happening in 63 years is not out of the question. That being said, it was still wrong. There was a peak during 1947, but 2010 had low sunspot activity.
68	* ''Series/FellowTravelers'': [[ChristmasEpisode Shortly before Christmas 1953]], Hawkins Fuller informs Fred Traband that he has worked at the State Department since 1948 and specifies "That's four years and ten months." However, the latter statement means that his employment began in February 1949, and not in 1948 like he claims.
69	* The third season of ''Series/TheFlash2014'', produced and set in 2017, describes an April 2024 event as happening eight years in the future instead of seven.
70	* ''Series/{{Frasier}}'': Based on Martin's and Frasier's ages and when Martin was forced to retire, it makes sense Martin was a Seattle cop for 40 years, not 30. He would have served his tour in the early part of the Korean War, come home in 1950 or 1951, immediately joined the force, met Hester, and got her pregnant. This fits as later in the series it is revealed Hester was pregnant when she walked down the aisle.
71	* ''Series/{{Friends}}''.
72	** Ross' birth date doesn't match with his purported age and his birth date changes throughout the series. The same problem appears when the matter of who is older ensues.
73	** Rachel's LongestPregnancyEver also counts.
74	** In season 2, Monica runs into someone she used to babysit for as a kid, who's a lawyer now. A fresh law school graduate would logically be about 25 or older, since law school takes 3 years after finishing an undergrad degree, and it is also doubtful that a new graduate would be representing a popular rock band as he is depicted as doing. It doesn't make sense to think of someone in this character's position as being younger than 27 or 28 at the youngest, but Monica was established to be 27 this season, so how could she have been his babysitter if they were the same age?
75	* ''Series/{{Fringe}}'': The fourth episode shows Walter Bishop's father's tombstone, which shows he died in December 1944. However, Walter was canonically born in 1946, which would be impossible with Robert Bishop dying in '44.
76	* ''Series/GameOfThrones'':
77	** In the interest of epic battle scenes, the number of people killed on-screen may not match up with statistics about the battle:
78	*** The Season 4 battle at Craster's Keep was against eleven mutineers. Jon Snow personally kills eight, Ghost another, and Locke another. Apparently the rest of the Watchmen only kill one mutineer between them?
79	*** The episode "The Watchers on the Wall" features a battle between the Wildlings and the Night's Watch. The previous episode states that there are only 102 watchmen in Castle Black. There seem to be considerably more depicted in the episode. To wit, a conservative count shows 41 watchmen killed on-screen. This assumes that no watchmen died on the ground while the cameras were focused atop the wall, or while Slynt was running to the pantry, or during Alliser's duel with Tormund, etc. It also assumes Ygritte missed every shot that didn't cut to her target getting hit, which was most of them. It's ultimately subverted; a later episode establishes that they indeed lost fifty men, including most of their dedicated warriors, utterly devastating them as an organization.
80	** During the final battle with the White Walkers, what appears to be the entire Dothraki horde charge into the dark with none returning. During the battle the Unsullied appear to fight nearly to the last man, or at least to the point the enemy army breaks all the way into the castle with only a handful of defenders left to oppose them and nowhere to run. The next episode both groups are mentioned to only lose half their number.
81	%% ** Mid-series, the North is realistically scrapping the barrel for manpower, but after the Battle of the Bastards, and the battle against the WW mentioned above, they still have an army large enough to worry Cersei, whose forces haven't had to fight in months and is augmented by thousands of mercenaries.
82	%% *** This is unfair; the north was divided and leaderless due to the ruthlessness of the Bolton menace. The Northern Lords, no longer tied down by the Long Winter, would likely be more willing to contribute soldiers to the Starks than the Boltons.
83	** Cersei and Jaime's age is inconsistent. Tywin Lannister was Hand to King Aerys II for 20 years before Robert's Rebellion, but Cersei, who became queen at 17 following the rebellion, remembers when he was appointed. In Season 4, Cersei says she has been queen for 19 years, which added to 17 would make her 36, but her twin Jaime was said to be 40 in the season premiere.
84	** These age inconsistencies are primarily due to the showrunners aging up many of the characters, but keeping the books' historical timeline. Ned, Cat, Jamie, Cersei, and the rest of that peer group are in their early 30s in the books with the oldest children (Robb, Joffrey, Danerys) being barely out of puberty while on the show their eldest children are 18.
85	** Another son of Cersei's (strongly hinted to be Robert's only legitimate son) who died young is added to the backstory, but the series still gives the total count as three whenever it comes up.
86	* ''Series/{{Glee}}'' has an episode ("Acafellas") in the first season where Kurt drives himself, Mercedes, Tina, and Rachel to see Vocal Adrenaline perform. In Ohio, teenagers can get their permit at fifteen and their license at sixteen, and can't drive more than one other person until they're eighteen, which is pretty consistent with most states. Of course, it's possible that Kurt's breaking the law, but given [[SpringtimeForHitler his idea of chaos]]...
87	** Another episode ("Night of Neglect") has Will Schuester telling the kids they need to sell taffy to raise money. He reasons that, in order to raise $5,000, if each taffy is 25 cents, they need to sell 20,000. He writes it as "5000 x .25 = 20,000." However, one of the producers did later say that the math was intentionally terrible because they thought it would be funny.
88	** Finn's father apparently died in Operation Desert Storm, when Finn was a baby. However Finn was a sophomore in the 2009-2010 school year meaning Finn was born at the earliest 1993, Desert Storm ended in 1991. It turns out she did lie, as she later reveals Finn's father came back from Desert Storm with PTSD, a drug problem, and an abusive personality. [[FridgeHorror This would be when Finn was conceived]].
89	** Rachel says in the episode "Dreams" that she was born in December of 1994, meaning when she graduated in Spring of 2012 she would have been 17. Rachel also planned on getting married before graduated without her parents' permission, even though in the state of Ohio (and most others in the country) you need to be 18 to marry without parental consent.
90	* ''Series/TheGoldenGirls'' was notoriously bad for this, especially regarding the women's ages. Fanon has tried to gloss over the worst of it by simply saying the women compulsively lied about their ages, even to each other.
91	** The worst was regarding Dorothy and her first child. It was repeatedly mentioned that Dorothy had a shotgun wedding at 17, was married for 38 years, and divorced two years before the show began. All this adds up to her age being fifty-seven with at least one child over 40. However, Dorothy was consistently "in her 50s" during the show's run (at least one time saying she was 55 - clearly the writers adding 17 plus 38 without considering the years she'd been divorced), and neither of her two children were ever shown at being anywhere over 30, with her son being explicitly stated to be 23, 29, and 30... and not in that order, either!... in his handful of appearances, and her daughter Kate got married in the second episode of the series, and there's no mention of her being exceptionally old for a first-time bride (the actress portraying her was 30 at the time of the episode.)
92	** Rose held together pretty well. In an early episode Dorothy says Rose is 55 and Rose said she was married for 32 years. Since she married at 18, things worked well (born in 1930, married in 1948, married 32 years until she was widowed in 1980,) until another episode said that her husband had been dead for 15 years, which would have either had to happen in 1970 or made her 65 when the show began. They were only one digit off (had they said 5 years, it would have worked). So close, yet so far.
93	** Blanche was the most consistent, purely by accident. Blanche was obsessively protective of her actual age (to the point one episode featured the other ladies obtaining her birth certificate and discovering her date of birth had been deleted by the governor,) so there were very few contradictory ages and birthdates given to the most concrete one: In a flashback, her mother mentioned that she ran off to marry an older man at 17 on Christmas Day 1949. This would mean she was born in 1932 and started the series at 53, lining up pretty well with an early episode where she begins to experience the onset of menopause.
94	** Sophia, like her daughter Dorothy, doesn't seem to age, remaining vaguely early-80s throughout the show's run. She says in an early episode that "I've lived 80, 81 years," suggesting she was born in 1906 and that her age should roughly be "80 plus the season number" (turning 81 in Season 1, 82 in Season 2, etc.) However, in other episodes, she says she's been walking since 1904 and had romantic trysts between 1914 and 1920, when she would have only been between the ages of 8 and 14. This is usually chalked up to the fact that Sophia had memory problems from a stroke and was possibly senile.
95	--->'''Sophia:''' So what? I'm old, I'm supposed to be colorful.
96	* ''Series/{{Haven}}'' was always vague on how old exactly Nathan and Duke were when the Troubles last came in 1983, 27 years before the start of the series in 2010. Based on the stories they tell, they were somewhere around 9 or 10, as Duke has clear memories of his father, who died when the Troubles last came (putting their birthdates around 1973-74). However, the episode with their high school ClassReunion implies they graduated somewhere around 1995, meaning that unless they took the long route to graduation, something doesn't add up.
97	* ''Series/{{Heroes}}'':
98	** Adam was around thirty when he was seen in 1671, which would make his birth year around 1640. But in a season 1 episode, "Takezo Kensei's" date of birth is given as 1584. Even accounting for the fact that Adam was a bald-faced liar, no one in their right mind would have mistaken him for an 87-year-old man. Especially since he didn't know yet that he didn't age. Of course, the season 1 thing could be hand-waved as an in-universe historical mistake, since Takezo Kensei is a legendary figure and since he was actually a cowardly English con-man (while everyone thinks he was a brave and magical Japanese warrior), the real details of his life were never known. There's also the point that it's implied that the majority of the Kensei stories never really happened, but were instead made up by Yaeko to create a StableTimeLoop. Within this context, it would probably make sense for her to backdate the events slightly to avoid awkward questioning of the legend. However, if this was true, Hiro would never have expected 1671 to be Kensei's time in the first place.
99	** Mohinder's mother says she was married to his father for 33 years. They had a daughter who died when she was five, originally three years older than Mohinder but later {{retcon}}ned to be about five years older. Assuming their first child was conceived after they got married (fewer than 1% of children are born out of wedlock in India), that would make their second child, Mohinder, at most 27 years old. He has a [=PhD=] and describes himself as a "respected professor", which would make him a heck of a whiz kid to say the least. However, it's indicated at another point that he's about 32 at the beginning of the series, which makes more sense.
100	* ''Series/HowIMetYourMother'' had a notable mistake in one episode, where Ted is haggling with a homeless man, trying to buy back some of Marshall's charts after the homeless man took them from the garbage. The homeless man won't accept any price other than a million dollars, so Ted promises him that he'll give him a dollar a day for a million days. The homeless man points out that that's twenty seven thousand years (and then accepts the deal). He added a zero- one million days is actually twenty-seven ''hundred'' years. (This has been corrected on subsequent airings.)
101	* ''Series/InterviewWithTheVampire2022'':
102	** "[[Recap/InterviewWithTheVampire2022S1E2AfterThePhantomsOfYourFormerSelf ...After the Phantoms of Your Former Self]]": Lestat de Lioncourt asserts in 1916 that "I have two centuries walked this Earth," but he was born in 1760, so he has been alive/undead for just over a century and a half.
103	** "[[Recap/InterviewWithTheVampire2022S1E4TheRuthlessPursuitOfBloodWithAllA ...The Ruthless Pursuit of Blood with All a Child's Demanding]]": In January 1923 [[note]][[Recap/InterviewWithTheVampire2022S1E5AVileHungerForYourHammeringHeart episode 5]] lists Florence's date of death as January 19, 1923[[/note]], Claudia is mistaken about her own age because she claims in her journal entry that she's 18 years old when she's in fact 19 (her birth year is 1903) and will become 20 later.
104	** "[[Recap/InterviewWithTheVampire2022S1E6LikeAngelsPutInHellByGod Like Angels Put in Hell by God]]": On Valentine's Day 1937, Louis de Pointe du Lac reminds Lestat that Claudia is "coming up on 33." This is wrong because Claudia was born in 1903, so she's already 33 years old in this scene, and she'll turn 34 later in the year. Louis should've said "She's coming up on 34."
105	** "[[Recap/InterviewWithTheVampire2022S1E5AVileHungerForYourHammeringHeart A Vile Hunger for Your Hammering Heart]]" establishes that Louis was born on Oct. 4, 1877 (that's the date engraved on the family tombstone that his sister Grace had added below their mother's name), which is accurate because his transition into a vampire occurred in late 1910 at age 33. However, the screenwriters forgot this in "[[Recap/InterviewWithTheVampire2022S1E7TheThingLayStill The Thing Lay Still]]" because Louis states that he was born in 1878 and is 61 years old on Feb. 6, 1940 when he should be 62, and Daniel Molloy later mentions that Louis is 144 years old in June 2022, which matches with the Oct. 4, 1877 birthday.
106	** "[[Recap/InterviewWithTheVampire2022S1E7TheThingLayStill The Thing Lay Still]]": While remembering events from the autumn of 1939, Louis tells Daniel that Lestat was "148 years the blood-drinker." This number is incorrect because Lestat received the Dark Gift in 1794, so he had been a vampire for 145 years.
107	* ''Series/{{Justified}}'': Protagonist Raylan's birthdate is given as 1970, yet he supposedly crippled high school baseball rival Dickie Bennett twenty years ago. Assuming that the show takes place during the same year it aired (2011) this would make Raylan twenty-one in high school, which given that he's been a Marshal for nineteen years (requiring him to have a college degree) seems unlikely.
108	* In ''Series/KathAndKim'' flashbacks show Kath being pregnant with Kim in the seventies, while Kim, Sharon, and Brett are teenagers in the eighties. Considering the show (aired from 2002) was set in the present day, Kim ought to have been born around 1978 and met Brett in the mid nineties. Rather than actually failing at math, the writers probably just thought the eighties were a better source of jokes (regarding fashion and whatnot) than the nineties.
109	* In ''Series/TheLastOfUs'', protagonist Joel’s sister-in-law Maria is pregnant in the present day. She was a lawyer with an established career as a prosecutor before a fungal pandemic wiped out most of humanity twenty years previously and had a child who died during the initial outbreak. This puts her very conservatively in at least her mid-forties. It’s very unlikely (albeit not completely impossible) that a woman that age would be able to get and stay pregnant at that age in a world with no access to fertility treatments. Notably Maria in the [[VideoGame/TheLastOfUs game it’s based on]] was never given a backstory nor was she pregnant, although she presumably is still about that age in the game.
110	* ''Series/MacGyver1985'': "Ugly Duckling" shows a pretty accurate example of how [[http://en.wikipedia.org/wiki/Triangulation triangulation]] works, with one little problem: the two base points they were taking readings off of were so close together, and the two angles they found were so different, that the third point would have had to be ''so close they could already see it.'' To get useful triangulation readings, they would have had to be a significant distance further apart.
111	* ''{{Series/Merlin\|2008}}'' reveals two illegitimate children from Gorlois' wife Vivienne. The first of whom is Morgause, who was smuggled out of Camelot and declared stillborn to be kept secret. The second is [[spoiler:Morgana herself]] and Uther is the father, which poses problems since she and Arthur are roughly the same age -- and Uther either cheated on Igraine while she was pregnant with Arthur or else used magic to conceive Arthur almost immediately after his affair with Vivienne. Morgause was kept secret, which is considerably harder for the ''mother'' to do, and requires her husband to have been away from the kingdom for long enough for Vivienne to have her affair and carry the pregnancy to term. All the while Gorlois was away for long enough not to notice any of this -- and [[spoiler:Morgana's]] conception has to have happened recently enough before his return that the child could be passed off as his.
112	* Certain aspects of ''Series/TheMiddleman'''s timing are... odd, though probably not outright contradictory. Consider the following:
113	** The show seems to be set in 2009. Middleman '69 says he's been in cryo for forty years. Also, Wendy and Lacey have known each other for five years and met as freshman, and Wendy watched Voyager 2 pass Neptune (in 1989) when she was three, which would likely put her in the college class of 2008.
114	** The Middleman was on his high-school football team in 1991. Presumably he was at least sixteen then, so he's at least 34 now.
115	** Sensei Ping first defeated a hundred men when he was twice the Middleman's age. So he's at least 68 (and defeated those hundred men when he was at least 68; given how casual he is about the idea now, there's a decent chance he's a lot older). This is kind of weird on its own, especially since he doesn't look anywhere near that old, but maybe that's why he doesn't want people asking about his age. However, he's also been training in martial arts for "two of [Wendy's] lifetimes", and she's 23. He must therefore have been an adult ''before'' he started training.
116	--->'''The Middleman''': Never ask Sensei Ping [[PlayingWithATrope about his age,]] the [[ChekhovsGun wrestler mask]]...\
117	'''Wendy Watson''': Or the clan of the pointed stick, [[SchmuckBait I know.]]
118	* ''Series/{{NCIS}}'' is pretty bad for this. Gibbs's backstory features a hilariously implausible timeline and Tony's age changes every other time it's mentioned. In ''Series/NCISLosAngeles'', G. Callen was in foster care from a very young age until, presumably, he was eighteen. During that time he was in 37 foster homes. All right. However, the longest he ever stayed in any home was three months. Even if he stayed in the other 36 homes for two months and 29 days each, that still doesn't come anywhere close to a minimum of thirteen years. And it's specifically mentioned that he usually only spent a few weeks to a matter of days in each place.
119	* ''Series/NickyRickyDickyAndDawn'': In "The Quadfather" (eleventh episode), the four quads were stated to be having their tenth birthday. However, it had been previously stated that they were in fifth grade, meaning they should have been celebrating their eleventh birthday or they should have been in fourth grade. It would be highly doubtful that quadruplets would have all skipped a grade.
120	* ''Series/TheOC'': In season one, Marissa's little sister Kaitlin is referred to by Seth as a fifth-grader, yet when [[PutOnABus the bus returns]] in season three, she's already in eighth grade, and looks even older, though strangely enough for a series heavy with DawsonCasting, ''she wasn't'' -- the actress turned fourteen shortly after her first episode aired.
121	* ''Series/OneTreeHill'': In the penultimate episode of Season 4, Karen gives birth and then Haley goes into labor during her high school graduation ceremony. Due to ComicBookTime, the first four seasons of the show take place over two school years - so both characters would need to have become pregnant during the first half of the third season to have full-term pregnancies. However, the earliest either character could have become pregnant is after the first games of the high school basketball season, which commonly takes place in early November, meaning both women would have given birth at the seven-month mark - a situation that would have resulted in the babies spending time in NICU, something that does not happen.
122	* ''Franchise/PowerRangers'' has screwed up a couple of times.
123	** Tommy was seen graduating high school as part of the Class of 1997 at the start of ''Series/PowerRangersTurbo''. By ''Series/PowerRangersDinoThunder'', he's got a [=Ph.D.=], and is a teacher at another high school -- where his students have a prom at the end of the season -- for the Class of 2004. It's impossible to get that qualification, have time to do the research which [[NiceJobBreakingItHero led to the creation of the bad guys]], then become a teacher, in only seven years.
124	** Then in ''Series/PowerRangersSamurai'', [[ThoseTwoGuys Bulk]] is shown bringing up teenager Spike, the son of his best friend [[Series/MightyMorphinPowerRangers Skull]]. He's about 14 or 15, which would mean he was born during ''Series/PowerRangersZeo'' or ''Series/PowerRangersTurbo''. He wasn't mentioned at the time!
125	** ''Series/PowerRangersOperationOverdrive'' has the character of Thrax, who is the son of Rita Repulsa and Lord Zedd. Overdrive ran during 2007, meaning that Thrax would have likely been born in between ''Series/PowerRangersZeo'' and ''Series/PowerRangersTurbo'' at the latest and there seems to be some form of WordOfGod stating that it was the case. The only other option, as Thrax looks to be a full-grown adult, would be that he would have had to have been born prior to Rita's initial imprisonment prior to the start of the franchise. That would also possibly explain why Rita was so reluctant to have another of Zedd's children; Zedd may have wanted to have another with Rita either due to Thrax's imprisonment or the love potion still in his system, if not both.
126	* A case of Techs Cannot Do Math: A 1963 telecast of ''Series/ThePriceIsRight'' had a contestant, Richard Darling, returning as champ with $10,118 won the week before. At the end of his next show he has won an additional $6,670 in prizes, which would have brought his two-week total to $16,788. The tote screen showed it as $16,778.
127	* ''Series/PrideAndPrejudice1995'': The Gardiners come to visit Longbourn for Christmas, and Jane subsequently returns with them to stay at their house in London for a little while. She writes a letter to Lizzie dated January 12, in which she references having gone with her aunt to visit Caroline in London "three weeks ago". Three weeks prior to January 12 would put this visit before Christmas (December 22). Even if they returned to London Dec. 26th and she visited Caroline the following day, that would be only 2 weeks and 2 days elapsed. Jane isn't given to hyperbole and is unlikely to round this up to three weeks. This letter is undated in the original book.
128	* ''Series/{{Riverdale}}'':
129	** In the fifth season episode "Purgatorio," which is also the TimeSkip episode, Veronica states the current year to be 2021, which creates a number of problems.
130	** In season one, FP's mug stated his birthday to be January 20, 1970 (which is also that of his actor, Creator/SkeetUlrich), then in season three (aired in 2019), he announced he was celebrating his fiftieth birthday. This would either {{retcon}} the previous seasons as having taken place earlier than they did, imply FP's mug shot was counterfeit, or indicate that season three took place in 2020.
131	** Early on in season one, Mike Posner's song "I Took a Pill in Ibiza" is heard at a party. Assuming the episode took place in the present day at the time it aired in 2017, this would've been fine...but the song was released in 2015, which does ''not'' equal seven years when subtracted from 2021.
132	* ''Series/SaturdayNightLive'': The December 12, 1998 episode in season 24 had host Creator/AlecBaldwin experience YetAnotherChristmasCarol in his opening monologue, with then-new castmember Creator/JimmyFallon appearing as the "Ghost of Hosts Future", telling Alec that he would become famous and host the season 37 Christmas show on December 12, 2011. December 12, 2011 was actually a Monday, not a Saturday, [[HilariousInHindsight although Jimmy did host that season's Christmas show on December 17, 2011, after all]].
133	* ''Series/SesameStreet'': In the Christmas special "Elmo Saves Christmas", Elmo gets a magic snow globe from Santa and wishes for it to be Christmas every day, resulting not in a GroundhogDayLoop, but in Christmas [[ChristmasEveryDay happening every day of the calendar year]]. A couple of misstatements about this come to light despite Count von Count's presence, and, in one case, even because of him: Elmo gets to see Christmas in springtime, and Christmas carolers sing about it being "very warm for May", but the Count has only counted 124 Christmases by now, so it would have only been April 27th (26th if it was a leap year, but 1997 wasn't). Apparently, the writers decided to make writing the song easier on themselves.
134	* ''Series/SexAndTheCity'':
135	** Carrie and Aidan break up shortly before Miranda gives birth to Brady, and Carrie bumps into Aidan and his new baby in Season 6, a few months shy of Brady's first birthday - which means that in less than a year, Aidan managed to spend a month depressed in bed, date at least two women (Nina Katz and his wife-to-be), marry one, and have a roughly six-month-old child.
136	** Miranda goes through a full-term pregnancy in about two months, as she gets pregnant in the summer and gives birth in early fall.
137	** Charlotte is still married to Trey when Brady is born. In the year following, she divorces Trey, gets together with Harry, converts to Judaism, marries Harry, and they have already started the process of trying to conceive together by Brady's first birthday. It's not impossible that could happen, but that's a lot of relationship changes to stuff into a one-year timeframe.
138	* ''Series/SingleDrunkFemale'': In Season 1 Episode 1/2, when in-universe it's near day 0 of her sobriety, Samantha is mentioned to be 28 years old then. In the last episode of the season, 367 days (so more than a year) have passed according to the same sobriety calculator, so a birthday ''must'' have occurred--yet she again mentions she's 28 years old. This isn't possible, she should have been 29 at this point. Then in Season 2 Episode 1, she ''does'' celebrate her 29th birthday--on day 549 of her sobriety. This should have been her 30th birthday.
139	* ''Series/StargateSG1'':
140	** Catherine Langford says she was twenty-one in 1945. This would make her four in 1928, yet ''Film/{{Stargate}}'' shows her to be much older (probably about twelve) in that year. Of course, this is hardly the only inconsistency [[AlternateContinuity between the film and the series]].
141	** In "Between Two Fires", Carter (of all people) calculates that they'll need 38 Ion Cannons to defend the planet without any blind spots. While 38 would definitely get the job done, you can eliminate all the blind spots on a sphere with as few as 4 viewpoints.
142	** In [[Recap/StargateSG1S4E6WindowOfOpportunity "Window of Opportunity"]], while hitting golf balls through the Stargate, Teal'c comments that Alaris, the planet they dialed, is several billion miles from Earth. That would put Alaris somewhere near Pluto. Heck, a light year is about 5.8 trillion miles and the closest star to our sun is Proxima Centauri, which is 4.2 light years away.
143	* ''Franchise/StarTrek''
144	** There is an official mathematical formula for calculating how fast warp speeds actually are (different ones for TOS and TNG eras). However, if you look at the instances where distance, warp factor, and time to arrival are all mentioned within the various series, it seems like [[TravelingAtTheSpeedOfPlot none of the writers bother with the formula]]. One of the more glaring examples is the ''Series/StarTrekEnterprise'' pilot "[[Recap/StarTrekEnterpriseS01E01E02BrokenBow Broken Bow]]", where the ship is said to be limited to warp 5 (on paper; in practice, they have yet to reach 4.5) but can reach the Klingon homeworld in four days, which ought to put Qo'noS somewhere in the Sol system's Oort Cloud by the TNG scale. (It's further but still way too close to make sense by the TOS scale.) This one's worse because of an offhand comment earlier in the episode that ''does'' sync up perfectly with the TNG scale. (At the stated speed, it would take 19 days to reach Alpha Centauri, our system's nearest neighbor.)
145	** Regardless of the series, the usual warp calculations put the stars hours or even days apart - yet they stream by the main viewscreen as though you were driving through a snowstorm.
146	** ''Series/StarTrekTheOriginalSeries'':
147	*** In "[[Recap/StarTrekS1E20CourtMartial Court Martial]]", Kirk sets the computer to increase sound by a degree of "one to the fourth power." He, of course, presumably meant to say "one '''times ten''' to the fourth power", or possibly, "ten" ''instead of'' "one": "ten to the fourth power" (either of which is obviously better than simply saying "ten thousand"). ''One to the fourth power'' equals... one.
148	*** In "[[Recap/StarTrekS1E23ATasteOfArmageddon A Taste of Armageddon]]", the power of a weapon is given as "Decibels - 18 to the 12th power". Setting aside the usual objections about sonic weapons in space (since Decibels can be used to measure any sort of power, and 'sonic' could just mean low frequency), we are left with the observation that not only has the writer bizarrely switched to base 18 (we'd usually say four times ten to power 22), but the writer is apparently unaware that decibels is a logarithmic scale. We have a power multiplier of 10 to power ((18 to power 12) / 10), which is a number far too big for the average scientific calculator, and vastly more power than the entire luminosity of our galaxy.
149	** ''Series/StarTrekDeepSpaceNine'':
150	*** The size of the Federation is a sticking point. In ''Film/StarTrekFirstContact'' Picard states it spans 8000 light years. Deep Space 9 is supposed to be at the opposite end of Federation space to Earth, yet characters routinely make the journey in a matter of days.
151	*** In one episode, Chief O'Brien mentions that his wife Keiko is on Earth celebrating her mother's one hundredth birthday. As Keiko is roughly in her late 30s, this means that her mother had her in her 60s. The original script called for her to be attending her mother's funeral. By the 24th century the average human lifespan is around 120 years, so this would be equivalent to a modern day woman having a child in her late 30s or early 40s. Fertility might be a problem for a 60-odd-year-old woman but considering the Federation's medical technology that can probably be explained away as well.
152	*** In "Rapture", Sisko says that a pillar is 11 meters tall, or about 36 feet tall. He then asks for a 75% scale reconstruction on the holodeck, which should be about 8 meters, or about 27 feet tall, but it's nowhere near that.
153	** ''Series/StarTrekVoyager'':
154	*** ''Voyager'' should have run out of torpedoes way before the end of the show based on the few times there was an inventory count mentioned in dialogue, but they somehow were able to keep firing them. They never seemed to run out of shuttles either: In one late season, Chakotay states that they have a full complement of shuttles despite at least three getting destroyed on-camera. Though it's implied by the construction of the Delta Flyer that the crew was rebuilding shuttles and likely torpedoes offscreen, and the ''Star Trek TNG Writer's Technical Guide'' states that ships have on-board industrial replicators to create standard parts of this nature. Creator/RonMoore said on a Usenet chat after quitting the series that he pitched a script that would have explicitly explained the EasyLogistics in general, but Creator/BrannonBraga vetoed it as unimportant.
155	*** The Ocampan reproduction system. Each female can become pregnant and give birth once in her life, and every birth we know of was single, no twins triplets etc... Even if every single female successfully conceived and delivered a baby at that time, they'd still have a radically declining population. Which, coupled with an Ocampan generation being about 3-4 years, means that with those numbers the entire Ocampan race should become extinct in about the life span of an average 24th century human. WordOfGod does say that multiple births are relatively common in Ocampans, probably for exactly this reason (these exact factors would give an evolutionary advantage to the genetics that favor multiple births).
156	*** The very premise of Voyager is an exercise in this trope as well as ContinuitySnarl. Based on all pre-Voyager calculations of how fast warps are, their trip home should have taken a maximum of around 7 years, not 70, and maybe even around 4 weeks.
157	** ''Series/StarTrekPicard'': The derelict Borg Cube known as the Artifact was claimed by the Romulan Free State at least sixteen years ago (based on the "[[XDaysSince THIS FACILITY HAS GONE (5843) DAYS WITHOUT AN ASSIMILATION]]" sign in "Maps and Legends"), yet Ramdha experienced the Admonition which drove her mad only fourteen years ago (which is the caption from the {{Flashback}} of "Broken Pieces"). She was assimilated at a later date by a Borg Cube, her existential despair caused it to undergo a submatrix collapse, which severed it from the Collective, and hence it became the Artifact. The writers clearly didn't double-check their numbers.
158	* ''Series/Supergirl2015'': Kara's age when sent to Earth is given as thirteen. Twelve years later, she's twenty-four. A year after that, [[spoiler:her adoptive father, who disappeared sometime after Kara arrived on Earth, says that he's survived Cadmus for fifteen years.]]
159	* ''Series/{{Supernatural}}'''s sixth and eighth season premieres both feature one year long {{Time Skip}}s that are frequently not accounted for whenever a date is mentioned on the show.
160	* ''Series/{{Supertrain}}'' has a top speed of 250 mph and cruises at 190 mph, but takes 36 hours to cross the United States. That puts its speed at about 80 mph.
161	* ''Series/{{Taskmaster}}'': In the Swedish version ''Bäst i Test'', they used the formula "e[[superscript:i]]x+1=0" as a hint for π (or rather, the digits 314). Except that's wrong. The formula should have been "e[[superscript:ix]]+1=0", with the x in the exponent.
162	* ''Series/That90sShow'':
163	** Neither Leia Forman nor Jay Kelso should be the ages they are in 1995. Leia should be a few months younger unless she was born premature and Jay is supposed to older than her despite the fact that his parents got together later than Leia's.
164	** Eric Forman's age is also inconsistent. In ''Series/That70sShow'', he celebrated his 17th birthday in 1976 (season 1, "Eric's Birthday") and his 18th birthday in 1978 (season 6, "The Magic Bus"), but in "That '90s Pilot" Donna says he is 38. Meaning, his birth year shifted from 1959 to 1960 and then to 1957 (which would make him older than his older sister Laurie, who was born in 1958).
165	* ''Series/TheThinBlueLine'': When drilling Constable Habib for his quiz team, Fowler says "Give me the first six primary numbers". She replies "1, 3, 5, 7, 11, 13, sir." The first six ''prime'' numbers (not "primary") are 2, 3, 5, 7, 11, 13. "Primary numbers" can also refer to [[https://en.wikipedia.org/wiki/Prime_power prime powers]], in which case the correct answer would have been 2, 3, 4, 5, 7, 8.
166	* In ''Series/TorchwoodMiracleDay'', when the characters are calculating how fast Earth's population is increasing now that [[DeathTakesAHoliday no one can die]], they count the dead people twice.
167	* In ''Series/VeronicaMars'', Logan Echolls finds out that his late mother's trust fund is running low unexpectedly. He's told that it's going to run out in fourteen months at this rate, but it turns out that it's only losing ten thousand dollars a month more than expected. The idea that his losing one-hundred and forty thousand dollars means he'll be broke in a little over a year doesn't mesh well with his continuing stereotypical rich-kid lifestyle nor the subtext suggesting that he noticed the missing money because he's actually being financially responsible.
168	* ''Series/{{Warehouse 13}}'': Claudia is 19 in Season One. It's mentioned that she was 10 when her brother vanished, and that he was missing for twelve years, so she should have been 22.
169	* In the first episode, of ''Series/YoungBlades'', [[HistoricalDomainCharacter Louis XIV]] is stated to be 15 years old. However, a later episode gives the date as 1652. Louis XIV was born on September 5, 1638, so he turned 14 in 1652.

Context WritersCannotDoMath / LiveActionTV