Continuity mistake: When Peter and Jeanie are outside talking about their test results, there is an extra in a green sweater behind them who covers more ground than humanly possible from one shot to the next.
Continuity mistake: When Vuselich is lecturing Peter about his medical study, and we see Peter's face, his cap is pulled down over the top of his ears. When the shot is on Vuselich's face, we can now see the tops of Peter's ears. It continues like this for the whole scene.
Obstruction of Justice - S4-E9
Continuity mistake: When Doug and Carol are making out in the exam room, their hands are around each other's waists. When Cynthia interrupts, suddenly his hands are around her face.
How the Finch Stole Christmas - S6-E9
Continuity mistake: When Romano is operating on the heart patient Valerie, Lucy has an instrument inside the patient. The shot then changes so that we can see her face and as she says, "Dr. Romano," there is no longer anything in her hand and she is holding it up waiting for a nurse to pass her an instrument, which she takes, but then the shot goes behind her - she now has a different instrument in her hand, which is in a different position.
Obstruction of Justice - S4-E9
Continuity mistake: Just before Carter is let out of his jail cell, he is examining his cellmate's carbuncle - his patient had a cigarette behind his ear throughout the scene but as the shot goes to show the cop arriving, the cigarette has gone.
Continuity mistake: During the opening credits, when they are working on an unconscious patient, his belt is undone and his fly is down. A couple of shots later, the fly is up and the belt buckled, even no one touched them in between.
An Intern's Guide to the Galaxy - S11-E5
Continuity mistake: When Dr. Dubenko is explaining a chemical reaction to the other doctors he starts to write on the wall. In the first shot he writes the following: 2H+ + H then the camera focuses on his audience and we hear continuing writing, then the camera cuts back to Dubenko when on the wall the following is written: 2H+ -> A. (00:24:00)
Continuity mistake: When Carol and Luka are sitting in Wrigley Field she has a Diet Coke can in her hand. But when she goes to stand up, she leans down and picks up the can of Coke from the floor - even though at no time did she put it down there.
The Peace of Wild Things - S6-E6
Continuity mistake: An elderly patient is grabbing at Dr. Lawrence's hands and crying, "Help me." He pulls his hand out of her grasp, but in the next shot we see him pull it away from her again.
Greene with Envy (a.k.a. Lawrence of Northwestern) - S6-E3
Continuity mistake: When Dr. Lawrence is tending to the patient with the stabbed wrist, the blood splatter on his lapel goes from bright red to brownish and back to red within a few shots.
Continuity mistake: When Doug and Carol are talking in the Pedes ICU, from one angle his head is against the back of the rocking chair, but from the other angle, his head is leaning forward. This continues for the scene, from shot to shot.
Do You See What I See? - S4-E10
Continuity mistake: When Carter enters the hospital with the patient Lenny, he suddenly has latex gloves on, when just a second before, when the scene was outside, he had no gloves on. There just wouldn't have been time for him to get them on.
Do You See What I See? - S4-E10
Continuity mistake: Within the space of what would appear to be more than 5 minutes in the ER, considering the continuous flow of action (starting with Kerry offering to get Pablo a taxi and ending with Dr. West examining the patient Lenny) the clock goes from 10:30 to 6:20. Shortly after that Dr. West pronounces Lenny dead, saying 13:38 (or 1:38).
Random Acts - S3-E20
Continuity mistake: After Mark is beaten up, he topples out into the hall when Doug opens the bathroom door. The shot from the hall shows his body from the armpits up is in the hall, but from the shot from inside the bathroom, he is lying in the hall from the hip up. Nobody moved him in the meantime.
Continuity mistake: When Doug is outside with his father, and the shot is on Ray, we can see a lot of snow in the air, but when the camera goes to Doug, there is no snow at all. The snow distribution on his father's coat change from shot to shot as well, too much to happen in only a Split Second.
The Peace of Wild Things - S6-E6
Continuity mistake: When Peter is doing the DNA test on Reese, the little boy's hands alternate from being behind him to being in front of him throughout the scene with no time for natural change.
Continuity mistake: Carter is working on a patient who has swallowed a lot of taffy - he is sitting behind his head with both hands working on his mouth. But when Anspaugh walks in he suddenly has one elbow up in the air and the other hand wrapped around the patient's chin. There was no time for the change in position.
Continuity mistake: During the scene where Carol and Mark are arguing with Doug about him examining the girl, the door behind her is closed. At the end of the scene, as Doug walks away, the door is open, even though no one went near it.
Survival of the Fittest - S7-E17
Continuity mistake: When Carter is talking to the boy who has asthma, at one point he says something like "I'm trying to help," notice the tube is not in the boy's mouth. The angle then changes, and he is holding the tube in his mouth instantly.
Tell Me Where It Hurts - S9-E7
Continuity mistake: In this episode Kovac has a patient who needs eye surgery. While at County General, Kovac says that the patient is 16 years old. Later, when Kovac goes to the golf course to get the doctor who does the surgery, he says the patient is 14.
Answer: Take care of your dad.