Factual error: While discussing the death of a car accident victim with detectives, the pathologist Dr Elizabeth Rodgers takes out a french fry, seasons it with mayonnaise and eats it. She is in the morgue, wearing bloodstained scrubs. Nobody ever eats or drinks in a morgue. This is not a character error; eating and drinking in a sterile laboratory environment is absolutely forbidden and this is taught to medical and science students from day one of their degree courses. In fact she would not even have food in there in the first place.
Factual error: Ryan, the laboratory technician, eats his lunch of burger and fries while discussing a murder case with Assistant D.A. Claire Kincaid. Trouble is, they are in his laboratory. No lab technician ever, ever eats or drinks in a laboratory - it is the most basic lab protocol imaginable. He could contaminate his samples in any one of a hundred ways, he inevitably contaminates his gloves or fingers with residue from his meal and he risks poisoning himself with accidental transfer. This is not a character error - lab security is hammered into science students starting with the first day of first year and number one on the list is never, ever eat or drink in your lab.
Other mistake: In the episode TOMBSTONE the scene where the murdered female lawyer is discovered, she's laying on her right side with her feet toward the direction of entry. In the next scene where the detectives view the body, the dead female lawyer is on her left side with her feet pointing toward the window.
Continuity mistake: Whilst Stone is looking at the pictures of the mobsters (as he is talking to Ann Madsen), he is holding the photos quite close together. The shot changes to a wide shot of the people in the room and the space between the photos is considerably wider than before.
Continuity mistake: During an interview with ADA Southerlyn, one of the former patients states when she woke up, her left side felt like a lead weight. She was told she had a stroke while under anesthetic. However, the entire time she is talking, it is the right side of her face that is exhibiting signs of the stroke.
Continuity mistake: In Episode 16-17, "America, Inc" from air date 3-22-06; The detectives determine that the victim's cell phone was found in a trash can near the entrance of the Lincoln Tunnel. Later, when they are interrogating a suspect Detective Greene tells him "You tossed the victim's cell phone at the entrance to the Midtown Tunnel.
Plot hole: During the beginning moments when the couple go to the top floor, as they are going to the roof they discover a lot of smoke on the penthouse floor which leads them to seeing the charred corpse in the hallway. The only problem is that with the smouldering body wouldn't it have set off the smoke alarm or fire alarm? The building is a very posh apartment block and they are on the penthouse floor making the likelihood something as basic as a fire alarm would be triggered. The killing was more in the heat of the moment and most likely the killer burned the body then and there making the probability of a lot of fire on the floor very high. Even if the woman had been burnt somewhere else and brought back to the floor there is no way the smoke around wouldn't at least have set off the fire alarm or sprinklers.
Other mistake: In the opening scene, something catches the husband's eye through a window. He asks his wife to take a look and she gets scared. There is a dead body. When Lenny and Curtis arrive, and are lead back to the body, you can see the view from the street is obstructed. There is a display case, a pedestal, a vase and finally a wall. The head of the body wouldn't have been visible from the street and there was no other disturbance to catch someones attention: The husband and wife couldn't have seen anything.
Audio problem: As the Stone and Schiff are watching the news report on the security camera tape the reporter has a voice over going whilst the tape is playing. Towards the end of the tape she is shown on TV and is doing a report on the case. You can see her lips don't come close to synching up with what she is saying. The piece was already airing on TV, so very doubtful the TV station missed the large discrepancy.
Continuity mistake: Season 18 - "Quit Claim": Near the end, when McCoy and Cutter walk into Cutter's office, McCoy closes the door. On the back of the door is a white board and McCoy writes "Fri 12:00" on the board and then underlines it. When McCoy opens the door to leave, "Fri. 12:00" is still there but the line under it is gone.
Factual error: While assisting Detectives Lupo and Bernard, the librarian in the New York library map room handles maps dating from the eighteenth and nineteenth century in a bizarrely cavalier manner. He does not wear soft cotton gloves, and flips the pages of the map books over as if they were modern books. Such maps would be extremely fragile and would never be handled roughly the way he does, and they would not be stored in plastic folders anyway. They would be stored flat in individual glass cases, and they would never, ever be touched with bare hands.
Other mistake: At the opening, the two undercover vice police are cruising down the street when the passenger cop looks to the side and says, "What the hell! Stop! Go back!" He saw something odd in the alley. When he says, "What the hell!" you can see through his window that the police car is about dead center of the building. His view of the alley where the victim was found would have been obstructed from view. They didn't move backwards, so it wasn't the alley they passed. The cop was looking into the alley they were approaching.