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Quotes

Sheldon: You participate in the mass cultural delusion that the sun's apparent position relative to arbitrarily defined constellations at the time of your birth somehow effects your personality.

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Mistakes

Through the whole episode, Missy's accent is sometimes completely missing in scenes and then stronger and more noticeable in others. See more...

Trivia

Raj's question about why so many of Stan Lee's characters' first and last names begin with the same initial (Peter Parker, Reed Richards, Bruce Banner, etc.) has been answered by Lee in interviews before: He has a bad memory for names, so if he can remember one of their names, he knows the other starts with the same letter. See more...

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Comments made in brackets are corrections from other visitors. To submit your own corrections for mistakes, just click "edit" under an entry, then choose "correct entry". You can also submit corrections for corrections, if you think a mistake has been unfairly removed.

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Season: Whole show  1  2  3  4  5  All

Across whole show

Throughout the series Penny complains that she is broke, and is paid minimum wage at The Cheesecake Factory. She even takes on additional duties as a barmaid to try to earn extra money. We also learn that Sheldon and Leonard live together as their apartment is too expensive for one person - Sheldon says he would be happy to live alone if he 'could afford the rent'. Penny's apartment is almost identical to theirs - it can't be that much cheaper. So, if two University lecturers can't afford an apartment in that building, how on earth can a waitress on minimum wage do so? [Penny complains that she is broke, but that is probably due to having to pay the rent, leaving her little money after. Penny does a lot of work to scrape up rent money and obviously she is able to earn the sufficient amount to afford it. Sheldon and Leonard work at the university, but as it is stated they earn limited amounts. Also, Sheldon and Leonard have a two bedroom apartment while Penny probably has a one bedroom apartment and therefore would not pay as much.]
Edit Corrected by Hamster
In the episodes "The Dumplings Paradox" and "The Pirate Solution" Penny mentions that she has a brother. But in the episode "The Maternal Capacitance", Penny talks to Leonard's mother about how her father had always wanted a boy. [She has a younger brother. Her father treated her like a boy because the male had not been born yet. And apparently, he kept treating her like a boy.]
Edit Corrected by Knever

The Bat Jar Conjecture (series 1)

Towards the end of this episode, Raj answers a question by buzzing in with Leslie Winkle sat next to him, and he answers. I though he couldn't talk to women or around women? Is this a mistake? [This point is addressed earlier in that episode. Leonard explains that he can talk once they're all mingled in with males (as in the audience).]
Edit Corrected by Knever

The Hamburger Postulate (series 1)

When Leonard is explaining his thoughts to Sheldon, during the rant which includes him naming who he intends with the words she or her (eg "She: Penny, Her: Leslie), he states, "Indicating that She: Penny had no interest in me asking Her: Penny out," which makes no sense. [Lenord is confused and ranting so making a mistake in that situation is not unlikely.]
Edit Corrected by Starchild Time

Pilot (series 1)

Raj talks aloud whilst Penny is still in the room. [Raj enters the room while Penny is in the bathroom about to take a shower. Raj does talk but, doesn't yet know she's there.]
Edit

The Friendship Algorithm (series 2)

Sheldon asks at the book store information desk if they have any books about making friends, and the employee tells him that all their books like that are for "little kids." It is unreasonable that the employee would not have been able to tell Sheldon about the very well known self-help book "How to Win Friends and Influence People," if Sheldon had not already been able to discover it through a cursory internet search. [1. They didn't stock the book. 2. The book was published in 1936. She hadn't heard of it herself. 3. Sheldon only thought of a 'How To make Friends' book after he entered the shop, so the idea of looking up a seventy year old book on the internet is irrelevant.]
Edit

The Killer Robot Instability (series 2)

Kripke states that there is no guarantee that he will face Leonard, Sheldon, and Raj in the round-robin. In a round-robin, all competitors face each other in turn. It is out of character for Kripke not to be aware of this, and especially for Sheldon to not correct someone making this basic mistake. [Although the tournament is scheduled as a round robin, it's apparent that a losing robot may be actually destroyed and unable to compete further. MONTE would be unable to face Kripke's robot if it was destroyed in a previous match, regardless of whether it was scheduled to meet them or not.]
Edit Corrected by Moose

The Vartabedian Conundrum (series 2)

Leonard sends a very long text to Stephanie. However it only takes him five seconds to write this long text. [If you watch the way Leonard types/texts in various other scenes throughout the series, he seems capable of doing it in extremely quick fashion, touch-typing/texting. He is a super-nerd, after all.]
Edit

The Spaghetti Catalyst (series 3)

When Sheldon says goodbye to Howard after walking with him on the street, he says "BYE, SHEL" instead of "BYE, HOWARD". [Howard tells Sheldon to have a nice walk and Sheldon replies "I shall", not "Bye Shel".]
Edit Corrected by THGhost

The Precious Fragmentation (series 3)

The "ring" prop is alleged to be one used in "The Lord of the Rings" movies. However, the prop used in the TV show has a gold chain, but in the films Frodo's ring is held on a silver chain. [The chain isn't what's important. It's the ring. The chain is not part of the prop.]
Edit Corrected by Knever

The Excelsior Acquisition (series 3)

Penny got a red light camera ticket while Sheldon was driving her car. She says she gave up Sheldon as the driver to the court because she didn't want to get anymore points on her license. You don't get points on your license for a camera issued violation. The registered owner just gets a straight fine. A police officer has to issue a ticket at the scene to get license points. [Penny is not a legal expert. She might not be aware of this technicality and still afraid of losing points.]
Edit Corrected by Captain Defenestrator

The Vengeance Formulation (series 3)

In episode 3-9: "The Vengeance Formulation," Kripke pumps helium into Sheldon's office to make his voice squeaky while conducting a phone interview. However, the helium is pumped in via a tube that is above the height of Sheldon's head, and helium floats in air; therefore, the helium would have accumulated near the ceiling and would not have affected Sheldon within a couple of minutes as shown. [Kripky opens 2 massive canisters of helium - enough to accumulate low enough to affect Sheldon's voice.]
Edit Corrected by Starchild

The Adhesive Duck Deficiency (series 3)

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. [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.]
Edit Corrected by XIII

The Creepy Candy Coating Corollary (series 3)

Wil Wheaton tells Sheldon that he missed the convention because his grandmother died. When Wheaton later refers to a living grandmother, Sheldon realizes he has been tricked. He shouldn't - presumably Wheaton, like everyone else, has two grandmothers (mother's and father's side) and thus Wheaton announcing he has a living grandmother in no way contradicts what he said before. This alone shouldn't tip Sheldon off that Wheaton was lying. [In context of how the scenes played out, it is directly implied (and very obvious) that Wheaton is talking about the same grandmother.]
Edit Corrected by XIII

The Love Car Displacement (series 4)

At the end of the show Sheldon states on the walkie-talkie, "I spy with my little eye, a ferrous metal," Later he reveals that what he spied was the aluminum rims of a police car. Aluminum is a non-ferrous metal - definitely not a mistake Sheldon would make. [Sheldon does say a non-ferrous metal.]
Edit