The Big Bang Theory

The Peanut Reaction - S1-E16

Corrected entry: At the apartment, after pretending to eat some of the granola bar, Howard throws the bar and wrapper down on the coffee table. He does not pick it up again before they leave the apartment. Later, at the hospital, he takes the bar from his pocket and eats some.


Correction: No, he breaks a chunk off the bar and stuffs it in his back pocket so it would look like he took a bite. This is what he removes at the hospital.

Grumpy Scot

Correction: Howard tells Sheldon to have a nice walk and Sheldon replies "I shall", not "Bye Shel".


Correction: The chain isn't what's important. It's the ring. The chain is not part of the prop.


The Rothman Disintegration - S5-E17

Corrected entry: After Sheldon has told Barry about the rules of Rock/Paper/Scissors/Lizard/Spock for the first time, Barry then replies "I'm sorry, can you repeat that." When he says "repeat", he correctly pronounces the "r." However, it has already been established throughout the series that Barry pronounces all his Rs like Ws due to his speech impediment.

Casual Person

Correction: Barry doesn't always mispronounce the letter R. It can happen with certain Rs and Ls.

The Codpiece Topology - S2-E2

Corrected entry: Sheldon states that the "Reinheitsgebot" would have severely limited the availability of mead in 1487. This is wrong for two reasons, the first being that the most commonly known version of this law wasn't introduced until 1516 and secondly this law only defined the price and the ingredients of beer and had therefore nothing to do with other alcoholic beverages like mead. (00:00:20)


Correction: Purity Law or "Reinheitsgebot" was actually introduced in 1487, the Bavarian Law replaced this in 1516. In addition, the law was in effect on the production of beers in the broad sense of the word, it's main purpose was to reduce the need for "precious' resources like grain wheat and rye and also reduce the usage of 'pagan' plants and materials. In addition, the existence of law only effective on beers would suggest that mead was indeed not likely highly available.

The Locomotion Interruption - S8-E1

Corrected entry: Sheldon says he was in a fire while taking a train through Des Moines. The largest Des Moines in Iowa has not had passenger rail service since 1970, and the much smaller Des Moines in Washington and New Mexico have never had it at all.

Correction: There may not be a station operating in Des Moines, but there are passenger rail tracks that go through it, stopping at Osceola. The fire could have happened on the train, as he does not specifically mention being at a station there.

Greg Dwyer

Correction: Sheldon's 'Vulcan hearing' is an important plot device, used in a number of episodes for comic effect. This is one of them. In another episode, Leonard says he can hear her toilet flush, so the apartments clearly aren't very soundproof.

Correction: He says "Hey, sorry," while panting - he's apologising for taking so long to answer the door.

Correction: Semantics. To most people, "DS" is sufficient enough to specify all of the Nintendo DS consoles. The same way that "Xbox" is sufficient enough to specify the Xbox 360.


He could have corrected him later. We don't get to see everything they supposedly say to each other.


Show generally

Corrected entry: In the opening song, one line is 'Autotrophs began to drool'. In fact, Autotrophs are self feeding organisms like plants, not animals, and so therefore cannot drool.


Correction: Autotrophs are in fact plants. Trees are the most common form of "plant". Trees seep. The Maple Leaf tree has been known to seep water, which, poetically, is drooling.


Correction: Both spellings are correct. I checked thirty six online dictionaries and they all list "collectable" and "collectible" as the correct spelling.

The Agreement Dissection - S4-E21

Corrected entry: For an obsessive genius Sheldon makes a stupid mistake when he blackmails Leonard into signing a new roommate agreement - any contract signed under duress is invalid. He gains nothing from Leonard signing the new agreement as no other action on his part is required. Effectively Sheldon has got his autograph. Big deal. Leonard is free to ignore the new agreement if he feels like it - and his lawyer was there to witness the fact that he was forced against his will to sign in the first place. This also begs the question of why Priya gets in such a panic about Sheldon blackmailing Leonard by threatening to reveal details of their relationship to her parents - why didn't she just advise Leonard to sign on the dotted line, explaining later that he signed an invalid contract? It would certainly have saved her a lot of grief.

Correction: Priya might have brought the idea of the letter of the law in, but Sheldon has never actually sued anyone for violating the roommate agreement. Leonard abides by it because otherwise Sheldon will become unliveable with. Priya won't give Leonard any more advice because of the risk that Sheldon will tell Priya's parents about Leonard's relationship.

Moose Premium member

The Robotic Manipulation - S4-E1

Corrected entry: Howard explains the ease with which he "borrowed" the programmable robot arm thus : "You just have to take it out to your car as if you own it". Howard doesn't have a car - he has a Vespa scooter, and there is no way he could carry the robot arm on that. (While we are on the subject, how does he transport it from Sheldon and Leonard's apartment to his house?).

Correction: His mother very likely has a car (we've heard her say that she's driving back to the grocery store), which Howard very likely used for this occasion.


The Staircase Implementation - S3-E22

Corrected entry: When Sheldon tells Leonard about the time travel clause, he states "in precisely five seconds." Anybody who knows anything about time travel know that you need a definitive point in time, so without having that exact date and time written down somewhere, there's no way a future version of them could arrive at that unspecified time. Sheldon's too anal to ignore something like that.


Correction: The precise time would be slightly before the signing of the Roommate Agreement, which is about to happen, so it's a markable point in their histories/future histories.

Captain Defenestrator

The Toast Derivation - S4-E17

Corrected entry: Sheldon makes fun of Leonard's idea to go to Raj's for dinner by speculating that they could stop using the letter M, which would be "isguided and oronic. Later he says that "This is adness. Complete and utter adness. He should have said "This is adness. Coplete and utter adness., leaving the M out of the word "complete" - and there is no way a pedantic, obsessive genius like Sheldon would make a mistake like that.

Correction: I viewed this scene more than 10 times and listened closely and Sheldon says, "This is adness; this is utter and coplete adness. He does in fact take the "m" out of the word complete.

The Adhesive Duck Deficiency - S3-E8

Corrected entry: When Penny and Sheldon get into the car to drive to the hospital, she makes the remark, "You do have a learner's permit, right?" He answers yes and explains he has logged several simulation hours which ended badly. She already knows he has a learner's permit and about the simulations, since in season 2, "The Euclid Alternative," she was with him at the DMV when he got the permit and stood beside him during the simulation, actually hitting him in the face with a pillow to mimic an airbag when he crashed.


Correction: Actually, after Sheldon said that it was the first time driving an actual vehicle, she said "you do have 'your' learners permit, right?" It was an indirect reference to the fact that (approx) a year had passed (a season for us viewers) and he had not stepped into an actual vehicle. Penny has been known to be sarcastic from time to time.


The Zazzy Substitution - S4-E3

Corrected entry: The proposition that danishes wouldn't exist if Copenhagen were flooded is wrong, because "danishes" were created by Austrian bakers. They are called danish in English-speaking countries because they're very popular in Denmark. The Danish word for this pastry is wienerbrød, which translates to "Viennese bread."


Correction: The origin of the Danish pastry is often ascribed to a strike amongst bakery workers in Denmark in 1850. The strike caused bakery owners to hire workers from abroad, among them several Austrian bakers, who brought along new baking traditions and pastry recipes.

The Skywalker Incursion - S8-E19

Corrected entry: Leonard refers to a never-ending game of "Bottle of Beer on the Wall" as having 'one times ten to the fourth' bottles of beer. One times ten to the fourth power is just one multiplied by itself a ridiculously large number of times, which equals one. That would be a very short game. Not a mistake a physicist would make.


Correction: One times ten to the fourth is 10,000.

Correction: That is totally possible when you play on a random board, which has the bonus squares in different places. I have played it with an opening word point total of over 225.

The Countdown Reflection - S5-E24

Factual error: There is not a snowball's chance of Howard becoming an astronaut. He suffers from cardiac arrhythmia, something about which he is completely open. "Transient" or not this is easily detectable by a simple electrocardiogram, which is a fundamental part of the many medical examinations a potential astronaut will have to pass. He wouldn't even be allowed to start basic training. Note also that during his basic training he shows signs of severe stress and trauma which would inevitably trigger a cardiac episode. Even if it didn't the fact that he was falling apart at the seams would have him removed from the programme for his own good.

More mistakes in The Big Bang Theory
More quotes from The Big Bang Theory
More trivia for The Big Bang Theory

Chosen answer: The song is called "Dark as a Dungeon" and was written and first performed by singer-songwriter Merle Travis in 1946. It has been performed by a wide array of artists, including Tennessee Ernie Ford, Harry Belafonte, Dolly Parton, Queens of the Stone Age, Kathy Mattea and Amy Grant. But it was made most famous when it was performed and recorded by Johnny Cash during his concert at Folsom Prison in 1968. According to Wikipedia: "It is a lament about the danger and drudgery of being a coal miner in an Appalachian shaft mine. It has become a rallying song among miners seeking improved working conditions."

Michael Albert

More questions & answers from The Big Bang Theory

Join the mailing list

Separate from membership, this is to get updates about mistakes in recent releases. Addresses are not passed on to any third party, and are used solely for direct communication from this site. You can unsubscribe at any time.

Check out the mistake & trivia books, on Kindle and in paperback.