The Big Bang Theory (2007) - 49 mistakes in series 1

Character mistake: 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.

Continuity: When Sheldon is telling Leonard that he didn't ask Penny out, there is a yellow food-bag on the counter between them that keeps changing it's position with every shot change.

Continuity: Sheldon puts the bag in the bin at the start of the episode so that the handle's are facing the ground. When he gets the bag out, the handles are at the top of the bin.

Continuity: At the end when Sheldon has got a burger, the amount of burger left changes depending on the camera angle.

Continuity: At the buffet table when the gang gets food, Howard walks in with his 'date.' Between shots, as he walks in, in one shot Sheldon puts his right hand up on his plate. In the next shot his hand is down.

Continuity: When Sheldon, Howard and Raj play Jenga, there is one block sitting at the top of the tower. When Leonard walks in, there are now two blocks at the top, before we actually see Howard place the second one on the top.

Factual error: Sheldon puts the sword up for sale on eBay. He then says, after only four seconds, that someone had "bought it now". Ebay items take up to an hour to appear in the listings/search results. So in 4 seconds, it was listed, Howard found the item, went through the standard purchasing form and bought the item. There is no way to find, and buy, an item in 4 seconds.

Continuity: In the scene where Leonard is packing up his collectables to sell, at 15:32 he is dusting what appears to be a Hasbro Marvel Legends Yellow jacket figure, which also has a yellow post-it on the back. At 15:42 he is still dusting a figure but he now holds a different (darker but not yellow) figure from the same series, with no post-it on the back, and the Yellow jacket figure is now on the table (house left of the box of collectables). At 15:56 The Yellow jacket figure has disappeared from the table, and it is not the figure in Leonard's hands either.

Continuity: When Leonard and Sheldon are walking downstairs, Sheldon stops and pins back up the caution tape that is in front of the elevator. Between shots, the other strip of caution tape untwists itself.

Continuity: When Leonard and Sheldon are sitting in the sperm bank waiting area, the position of Sheldon's bag strap keeps changing.

Other: Raj plays the message on his phone. Howard then takes the phone and instantly, physically dials her number, despite the fact he did not look for it and does not know her or her number.

Continuity: In the electronics store, when the man asks Sheldon which hard drive he should buy in the first shot he is holding the green box in his left hand. Next shot it is under his arm.

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

Continuity: At the start when Sheldon and Leonard are sitting at the table, and then talking with Dennis, their soda cans on the table keep rotating themselves and the straws in them change position a couple of times too.

Continuity: When Sheldon walks out his bedroom wrapped in a comforter, he drops it on the higher level before the drop down to the kitchen. In the next shot as he walks away from the fridge, half of the comforter is now spread over the lower level without anyone moving it.

Continuity: After Leonard gives Penny her pile of mail, she alternates from holding the pile by her side to at her front between each shot.

Continuity: When Penny is telling Howard and Raj about Sheldon's "drug addicted cousin" her scarf keeps jumping in and out of her jacket.

Continuity: When Sheldon is talking with Leonard in the kitchen at night, as he pours himself a mug of milk the mug moves between shots.

Continuity: During the whole opening scene, the way in which Leonard holds the letters in his hands keeps differing.

Continuity: When Raj's parents tell him to put his laptop down and gather his friends, they all huddle around the one-seat sofa. Sheldon is crouched to the left of the seat with his hands on the sidearm, yet in shots angled at the left he has disappeared from his place (as to not obstruct these particular angled shots.)