While You Were Sleeping - S1-E2
Other mistake: When Sherlock was slapped, he later says he was surprised because the girl who slapped him was a "lefty." Then he rubs his right cheek and says it's leathery from all the slaps he's gotten, while the left is soft. This is backwards - anyone hitting him with their right hand would hit his left cheek.
Character mistake: They are in the interrogation room questioning the fiancé of the scientist Natasha when the captain says, "the blood we found at the scene of your fiance's murder, it didn't belong to Bobby Cordero." The characters name was Benny Cordero, which the captain says correctly a few lines later. (00:33:25)
To Catch a Predator Predator - S5-E5
Continuity mistake: When Joan is sitting on the couch folding ties while Shinwell tries on a shirt, she has a folded up blue tie with white dots. When the camera cuts back to her and she's now folding a gray tie, you can see the blue tie with white dots, unfolded, lying on the clothes. Previously there was no tie there. And in the next shot of her, she once again folding the blue tie and the gray tie can't be seen.
Character mistake: Sherlock tells Odin at the bridge where he framed him for his own murder that they are opposite poles of a magnet - they repel. That's wrong - opposite poles attract each other.
Character mistake: Sherlock states that Sean Figueroa has "such blue eyes" even though he has brown eyes. (00:39:05)
Continuity mistake: When Marcus and Joan are watching Gephardt's video, he says he's taken lives. At this point the play bar is by his fingers. It cuts to Marcus and Joan, and we hear the video continue to play for more than 12 seconds. When it cuts back to the video, the play bar is nearly in the same position, when it should be well past his hands and near his elbow.
How the Sausage Is Made - S5-E8
Continuity mistake: When Sherlock puts down the meat sample in the cup, you see the toothpick tilt over to the side. In the next shot, the toothpick is straight up and down. In some shots, the meat sample in the cup are gone.
Continuity mistake: When Shinwell and Sherlock are playing chess, the captured pieces move around in various shots. For example, Shinwell takes Sherlock's knight, he places it closer to him than the pawn. In the next shot the pawn is closer to him. It changes a few more times as do the captured white pieces.
How the Sausage Is Made - S5-E8
Continuity mistake: The note Watson picks up changes when it switches to a close up view of the writing. For example, you can see one line ends with "you when" and another line ends with "not" (being underlined). In the close up the corresponding lines end with "you when I" and "not to" (not still being underlined).
Continuity mistake: In the title sequence a Rube Goldberg machine can be seen. The error can be seen by watching the four revolvers rotating and then a single revolver firing. When you look at all four revolvers, there are hand grips in each one, but in the closeup shot of one actually firing, the hand grip is empty. You can't see it later than S5E18 because they decided to delete the frames when you can see all four revolvers, and left only closeups.
Continuity mistake: While playing the piano in Justin Guthrie's apartment, he is bare handed. In the next scene when he gets up to point at the blood, he is wearing gloves. (00:24:12 - 00:24:42)
Enough Nemesis to Go Around - S3-E1
Factual error: The 1-ton electromagnet is supposed to have moved only the bullets without affecting the steel elevator car at all. This is impossible.
Character mistake: The American Flag is hung improperly on the wall. The Flag's union (stars) should be at the top, to the observer's left, but it's to the observer's right. (00:06:38)
Continuity mistake: At end of the episode, when Sherlock leaves Detective Bell outside the 11th Precinct, Bell had a book and an envelope of which Bell puts the envelope in his pocket leaving the book, the next shot shows Bell turn and throw the envelope in the trash and the book disappears. (00:39:15)
Continuity mistake: Early in the show, when Sherlock is making eggs, he adds milk and sets the jug down. The camera shifts to Watson and back to Holmes, which shows the jug missing. Watson then walks around Holmes and sets the jug down in the spot it was in previously.
Other mistake: When Sherlock and Watson look at the coffee order from the trial it has the names of the 4 jury members who robbed the vault. Not the original men that did the robbery.
Unfriended - S7-E11
Character mistake: Odin Reichenbach talks to Sherlock about "doing the irrevocable", but pronounces it "irrevOWEcable." It should be pronounced "irrevacable" in both British and American English. He's supposed to be a highly intelligent, highly educated person - not a mistake he should make.
Suggested correction: Not necessarily. A lot of people have strange vocal tics where they pronounce a certain word in a certain way, usually without even realizing it. My grandfather was a smart guy, and he always mis-pronounced "toilet" as "ter-let."
On the Scent - S7-E9
Continuity mistake: Sherlock and Marcus visit a suspect's house. There are a bunch of cell phones on a console. One is gold with the name "'Mandy" on it. In a wide angle shot the gold phone is by itself next to some other black phones. Next closeup shot you see the gold phone is on a different position behind some other phones, and a green phone is added to the bunch. (00:18:40)
Red Light, Green Light - S7-E4
Other mistake: The crash at the start is staged - the semi truck is driving at 20/30mph, is T-boned by the van, and stops instantly. No screech of brakes, no allowance for the driver's reaction time. In the shot of the impact it's moving at barely walking pace, hence being able to stop so quickly.
Factual error: The number plate on the black cab is GW22 ARY. This won't happen until the year 2022. (00:28:20)