Trivia: Sheldon tells Penny not to sleep with her head close to the door because a headboard is always oriented away from the door; yet in later episodes, we see Sheldon in the exact sleeping spot that he told Penny not to sleep in. At this point I am referring to Pennys' sleep over whilst on Sheldons' couch.
LorgSkyegon
14th Oct 2025
The Big Bang Theory (2007)
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Suggested correction: Sheldon's headboard (and head) is against the wall on the wall opposite his door.
12th Feb 2021
The Big Bang Theory (2007)
The Parking Spot Escalation - S6-E9
Corrected entry: For being smart they act stupid here. They don't think to alter the days the guys use the parking space with Friday being where they either share it together or Leonard or Raj get it while Howard and Sheldon would each get it two days apiece.
Correction: It's not a stupidity. It's entirely within the personalities of the two friends that Sheldon wouldn't accept change and give up something that is rightly his and for Howard to gloat over that he's a bigger deal than Sheldon now and refuse to give up something given for his new celebrity.
Correction: Sheldon didn't even have a car. Heck, he didn't even have a license. Well, except for a later episode where he secretly had a license that he never used.
This point is made several times in the episode. The fact that Sheldon does not have a car but still agues forcibly for his right to the parking space serves to reinforce the recurring theme of the show, that Sheldon is unbearably eccentric and opinionated but still manages to engage with his social group.
20th Aug 2020
The Big Bang Theory (2007)
Factual error: Characters sometimes talk to one another on video calls, and a character (A) often watches these from an angle rather than face on, allowing the viewer to see both character A and the character on the call (B). When this happens, character B is shown turned a little to one side, to give the impression that they are looking directly at character A (as they would be if they were present in the same room). In reality, this means that character B is looking off to one side of their monitor and not at the image of character A, something that it makes no sense to do. No matter what angle the laptop is shown from, provided character B is visible, they should appear to be facing the viewer.
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Suggested correction: Since we almost always see these video calls using full-screen, people sitting side-by-side would be on different sides of the screen. You wouldn't look into the webcam itself to see them. You would look at the screen, and move your head slightly to look at the left part versus the right.
20th Jul 2020
The Big Bang Theory (2007)
The Adhesive Duck Deficiency - S3-E8
Factual error: Maybe I'm wrong but I've had the dislocated shoulder experience and shouldn't hers be in a sling at her side not across her front right to left? This just seems odd.
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Suggested correction: That type of sling is the best for preventing movement of the shoulder joint. It is the proper one.
19th May 2020
The Big Bang Theory (2007)
The Proton Regeneration - S11-E6
Character mistake: While bedridden after his vasectomy, Howard asks Bernadette to grill up a couple steaks instead of picking up Chinese for dinner. She gives him a disapproving look and he says "Kung Pao Chicken, please." A major ingredient of Kung Pao Chicken is peanuts. A major allergy for Howard is peanuts. (00:09:04)
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Suggested correction: Since they are both quite well aware of it, they likely have either found a Chinese restaurant that doesn't use them, or they get it without peanuts.
Yup. My friend is allergic to peanuts and our local Chinese restaurant makes hers with almond instead of peanut.
15th Nov 2019
The Big Bang Theory (2007)
The Platonic Permutation - S9-E9
Continuity mistake: In episode 16 of season 1, Penny is talking about making a cake for Leonard's birthday and states she knows his birthday because she was checking a horoscope for him. But in this episode she does not know when his birthday is, which leads to Leonard revealing he was secretly reading Penny's diary. (00:40:00)
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Suggested correction: It's certainly possible to forget something you knew eight years ago.
This is perhaps true for two people who rarely have contact, but I would list this as a character mistake. Penny and Leonard are in a serious relationship and are married at this point.
This is also a couple who BOTH forgot it was their anniversary.
I forgot my wife's birthday on a number of occasions. It's one of the reasons she is now my ex-wife.
There's a difference between forgetting and not knowing.
25th Feb 2019
The Big Bang Theory (2007)
The Habitation Configuration - S6-E7
Corrected entry: Howard states in The Shiny Trinket Maneuver that he started doing magic to try to get girls to come to his room, but in this episode he tells her he started magic when his Dad left because it made his Mom happy and made her forget for a while.
Correction: He also may have gotten the idea for doing magic to get girls to his room, but actually started doing it to cheer up his mother.
6th Jan 2019
The Big Bang Theory (2007)
The Long Distance Dissonance - S10-E24
Corrected entry: Dr. Ramona Nowitzki returns and Sheldon introduces her to everyone as if they have never met her but, outside of Amy and Bernadette, they did years ago back in season 2. At the very least Leonard and Penny should remember her. But no-one acts like they do.
Correction: When bringing her to lunch with the other guys, Sheldon specifically says "You may remember Dr. Nowitski" and they reply. They obviously do remember meeting her.
26th Sep 2018
The Big Bang Theory (2007)
The Beta Test Initiation - S5-E14
Character mistake: Sheldon says (during Fun With Flags) "But like the flag over Fort Sumter, I'm still here." The Sumter flag was lowered when the fort surrendered to the Confederates. The flag over Fort McHenry was never taken down despite the British bombardment and inspired Francis Scott Key to write the National Anthem about it. Whouldn't a vexologist know that?
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Suggested correction: Sheldon is referring to the actual Fort Sumter flag, which still exists and is on display at the Fort Sumter museum.
Sheldon is not referring the actual flag (especially since if the actual flag is in a museum it's not still over Fort Sumter). Sheldon is referencing the line from The Star-Spangled Banner "our flag was still there." Key wrote The Star-Spangled Banner after seeing the flag over Fort McHenry was still there. The writers simply made a mistake and Sheldon the character would know which flag inspired the line. Incidentally, the actual Fort McHenry flag also still exists.
17th Jul 2013
The Big Bang Theory (2007)
The Nerdvana Annihilation - S1-E14
Corrected entry: At the beginning, when Leonard has won the online auction, we see a shot of his laptop computer screen showing an Apple Safari browser window with Mac OS X window controls, but the laptop is a PC, not made by Apple. Mac OS X can only run on Mac hardware.
16th Jul 2013
The Big Bang Theory (2007)
The Zarnecki Incursion - S4-E19
Plot hole: If Howard can hack into Blizzard's database so deeply that he can get the name and address of game players, he could easily restore all of Sheldon's stolen 'items'. Hacking personal details - a player's real identity and their home address! - is hardcore, detailed work that only an expert could do, compared to which adding a few extra items to a player in the game would be child's play. Sheldon would not be concerned about a possible comeback from the administrators at Blizzard. First, Sheldon doesn't hack into the database, Howard does, and someone as pragmatic and self-centred as Sheldon would simply disclaim any responsibility. Second, hacking into another player's account to access highly sensitive personal information like their home address would risk incurring the same penalty from Blizzard anyway. Either Sheldon doesn't know that or he doesn't care. Third, his account has already been hacked when the virtual items were stolen. He could simply claim that Howard's hacking into his account was just more of the same - nothing to do with him. Fourth, Blizzard did not detect the hacker stealing Sheldon's virtual items, nor did they prevent it happening, and they did not detect Howard hacking into his account to obtain his name and address. Sheldon can rightly assume he has nothing to fear.
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Suggested correction: Hacking the database to return items to Sheldon's account would also be traceable to Sheldon's account as cheating. That would get him permabanned if discovered, not a risk Sheldon wants to take.
First, Sheldon doesn't hack into the database, Howard does, and someone as pragmatic and self-centred as Sheldon would simply disclaim any responsibility. Second, hacking into another player's account to access highly sensitive personal information like their home address would risk incurring the same penalty from Blizzard anyway. Either Sheldon doesn't know that or he doesn't care. Besides, if Blizzard were aware that Howard had hacked into Sheldon's account, why weren't they aware that the person who stole the virtual items did?
Reading information from a server is easier than writing new data into it. You can steal a mass bulk of files and extract the information at a later time, whereas writing information in Sheldon's account would take much more precision.
28th May 2013
The Big Bang Theory (2007)
Corrected entry: Penny uses different mailboxes along the top row to get her mail.
Correction: My mailbox was changed three times in the three years I lived in my last apartment.
6th May 2013
The Big Bang Theory (2007)
Corrected entry: Leonard and Sheldon live in 4A and Penny in 4B. Yet when they go to the mailbox downstairs, Sheldon's mailbox is the upper left one while Penny's is the third or fourth one from the left. Mail boxes have to be in apartment order, not necessarily for the tenant who could remember where their box is but for the mailman to be able to use the apartment number as to placement of the mailbox. Whenever a sub carrier would do the route, he wouldn't be able to follow the random pattern.
Correction: My first apartment building didn't have them in order. The boxes were marked with either the apartment number, the tenant names, or both.
11th Jun 2012
The Big Bang Theory (2007)
Corrected entry: Leonard and Penny are inhaling Sulphur Hexaflouride to make their voices low. The effect can be seen to be fake for two reasons. First, their voices go back to normal instantly and on demand - the gas actually takes a while to clear. Second, when Leonard releases the balloon, it flies away; it should just fall to the floor because Sulphur Hexaflouride is heavier than air.
Correction: 1. Wrong episode. This scene is from Episode 23. 2. Your voice will clear in as much time as it takes to clear your lungs - one or two breaths. 3. A sulfur hexafluoride balloon will still fly, as the escaping gas is still propelling it, as demonstrated in this clip by Mythbuster Adam Savage http://www.youtube.com/watch?v=d-XbjFn3aqE.
25th Mar 2012
The Big Bang Theory (2007)
The Wiggly Finger Catalyst - S5-E4
Corrected entry: In this episode, everyone is surprised to learn that Raj's family is enormously rich, but in episode 15 of season 4 Raj states that his family is wealthy and has lots of servants.
Correction: They knew Raj's father was a well-off doctor, so someone we might call upper class. This episode they found out he was extremely rich, more along the lines of the richest men in the country.
25th Mar 2012
The Big Bang Theory (2007)
The Luminous Fish Effect - S1-E4
Corrected entry: When Penny and Sheldon are driving to the supermarket, Sheldon is explaining the weight of the car and how it affects her braking time. He estimates the car's weight to be 4000 pounds, 140 for himself and 120 for Penny, and then rounds the total up to be 4400 pounds, when it actually should be 4260. It's extremely out of character for somebody like Sheldon to make such a basic addition mistake.
Correction: Or he could be including other things he just failed to mention, such as the contents of the vehicle and trunk.