The Big Bang Theory
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The Financial Permeability - S2-E14

Continuity mistake: When Sheldon asks Penny if he lent her enough money, the container he is holding opens on its own. (00:09:25)

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The Vartabedian Conundrum - S2-E10

Continuity mistake: When Stefanie and Leonard are talking in bed towards the end, Stefanie's arm moves from on her head to on her pillow instantly. (00:16:30)

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The Euclid Alternative - S2-E5

Continuity mistake: When driving down Euclid Avenue, the background is constantly changing between shots. In one shot it's a busy main street and in another it's a suburban street. (00:04:50)

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The Euclid Alternative - S2-E5

Continuity mistake: When Penny turns on to Euclid Avenue, the car behind her just vanishes into thin air. (00:03:50)

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The Griffin Equivalency - S2-E4

Continuity mistake: When discussing what qualities their new friend should have, the container Howard has changes position instantly. (00:17:20)

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The Comic Book Store Regeneration - S8-E15

Continuity mistake: While Bernadette is talking with Howard about Stuart living in Mrs. Walowitz's home, she is taking items out of a grocery bag. One of the bags of food changes spots on the table in the next shot.

bobthedancingdonut
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The Grasshopper Experiment - S1-E8

Continuity mistake: 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.) (00:02:00)

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The Einstein Approximation - S3-E14

Continuity mistake: When Sheldon is looking for another job, the woman is holding a piece of yellow paper up. Camera cuts and she is no longer holding the piece of paper.

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The Werewolf Transformation - S5-E18

Continuity mistake: When Penny is giving Sheldon his haircut, she accidentally shaves the back of his head. The clippers are going from the bottom of Sheldon's hair, up to the top of his head. When Sheldon goes to leave the room, it can be seen only four or five inches from the back of his head have been shaved off.

Casual Person
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The Griffin Equivalency - S2-E4

Continuity mistake: In the opening scene, just after Howard says, 'Creepy good or creepy bad?', there is a shot where Howard is holding his food, even though Leonard hasn't given it to him yet and it isn't there in the shot before or after. After Leonard gives the food to Howard, the exact same shot is used after he says, 'I'm not necessarily talking about the food', so the shot was taken from there and it is shown twice. (00:00:25)

duncanmc
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The Pancake Batter Anomaly - S1-E11

Continuity mistake: After Leonard gives Penny her pile of mail, she alternates from holding the pile by her side to at her front between each shot. (00:01:10)

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The Bad Fish Paradigm - S2-E1

Continuity mistake: When Sheldon is sitting with Raj in his apartment watching television, the can of soda on the table in front of him rotates itself a couple of times. (00:14:40)

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Pilot - S1-E1

Continuity mistake: When Penny is in the shower, there is a red comb on the cistern of the toilet. In the next shot, it has moved without anyone touching it. (00:15:50)

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Season 1 generally

Continuity mistake: In "The Luminous Fish Effect" (S1E04) Sheldon tells Penny he weighs 140 pounds. In "The Porkchop Indeterminacy" (S1E16), he tells his sister he weighs 165. 25lbs difference would be a noticeable change, but he looks the same.

MFWills
Upvote valid corrections to help move entries into the corrections section.

Suggested correction: Lying to Penny but not to his sister, not inconsistent with the characters and his relationships.

LordKelvin

There's been several episodes showing Sheldon is not a good liar.

Bishop73

The Work Song Nanocluster - S2-E18

Continuity mistake: When Penny puts the box down at the start it is closed. Camera cuts and it's open instantly.

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The White Asparagus Triangulation - S2-E9

Continuity mistake: When Leonard is helping Sheldon open the jar, the red napkin which he left on the couch where he was sitting changes position or vanishes in every shot.

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The Loobenfeld Decay - S1-E10

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

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The Lizard-Spock Expansion - S2-E8

Continuity mistake: At the very beginning, Leonard's Diet Coke keeps changing position without anyone touching it.

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The Pork Chop Indeterminacy - S1-E15

Continuity mistake: When Sheldon says that his sister was sent to spy on him, his arms are behind his back. Camera cuts and they are now at his side.

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The Peanut Reaction - S1-E16

Continuity mistake: When Penny asks Sheldon "What trauma?" in the electronics store, Sheldon holds two boxes - one with an orange side on top of one with a black side. In the next shot the black sided box is on top of the orange one. The boxes then continue to swap places during the whole scene. (00:11:50)

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The Habitation Configuration - S6-E7

Continuity mistake: When Howard is almost done moving out of his mother's house, there is a table in front of him with a measuring device in the top corner. In one shot, the device moves to the opposite corner of the table. In a few shots later, the item returns to its original position.

bobthedancingdonut
More mistakes in The Big Bang Theory

The Extract Obliteration - S6-E6

Stephen Hawking: Do you like brain teasers?
Sheldon Cooper: Oh, I love brain teasers.
Stephen Hawking: What do Sheldon Cooper and a black hole have in common? They both suck. Neener, neener.

More quotes from The Big Bang Theory

The Holographic Excitation - S6-E5

Trivia: In this episode, Sheldon and Amy are trying to decide on couples' themed Halloween costumes. Sheldon is standing in front of the dry erase board. There are 2 columns written on the board. One named "Couples I Like" and the other "Couples You Like." Under the "Couples You Like" column, one of the couples is Blossom and Joey. Blossom is the name of the television character played by Mayim Bialik in the 90s and Joey was one of her brothers.

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