Continuity mistake: In season 2, Doug mentioned that he hadn't seen or spoken to his father in 22 years, since he was twelve. But when he's going through his father's things at the motel, he finds pictures of himself from high school. Plus, he mentions his father teaching him how to drive when he was about 13 or 14.
Suggested correction: He said he was 13 or 12 no mention of 14.
Continuity mistake: When Malik finds Carter's family noted amongst the richest in Chicago, he says that Carter's father is named 'Roland'. However, in later episodes, Carter's father's name is given as John Truman Carter, Jr.
Continuity mistake: When Carter is examining the patient Tom Angevine who drove into a tree, we can see two very noticeable parallel cuts from his eye to his chin - but as it goes to close up they miraculously disappear.
Continuity mistake: Towards the end when Abby and her mother are in the apartment talking about her leaving, Abby is holding the baby and when the camera is facing her the baby is up on her shoulder. But when the camera is to her back facing her mother the baby is down. It continues like that through the whole scene.
Long Day's Journey (a.k.a. Missing Persons) - S1-E15
Continuity mistake: Doug Ross puts a piece of gauze over the young girl Mandy's wrist - the shot changes to over his shoulder and there is suddenly no gauze. Within a few seconds he then manages to bandage up her hand, as he talks. In real time, it couldn't have been done that quickly.
Be Patient - S6-E15
Continuity mistake: When Luka is accusing the man who hit the little girl, he places his hand on the guy's chest and says "and you just drove off - Hit and Run?"; the shot changes and his hand is off to the side, no where near the man's chest.
Continuity mistake: Mark and Dave are talking about the parachutist who had just died. As Dave says, "He died before I had a chance", an extra walks by them on the right. The shot shifts to Mark, who replies, but it is 4 seconds before the extra appears again beside Mark - this should have happened in a Split Second, not 4.
Continuity mistake: Dr. Romano hands Lucy a pen so that Valerie's mother can sign a consent form. Lucy puts her hand on the pen and then the shot changes and we see her put it on the pen again.
Nobody Doesn't Like Amanda Lee - S5-E11
Continuity mistake: When the policeman tells Aaron's parents that he died in a car accident, his mother grabs her husband by the front of his shirt but in the next shot her hand is on his lapel, with no time for the change.
Continuity mistake: Lizzie puts two cans of soft drink on the table in front of Peter - but a short time later they have moved noticeably, even though neither of them touched them.
Continuity mistake: Carol sits down at the breakfast table in a normal sitting position, however the next shot shows her with her knee up on the chair, almost up to her chin.
Continuity mistake: As Luka talks to the kidney patient, he is holding his chart to his chest. But several times during the scene, when the shot is on the patient, his hands are at his waist, but at other times they are folded in front of him.
Greene with Envy (a.k.a. Lawrence of Northwestern) - S6-E3
Continuity mistake: When the shooter in the ER drops his gun, it falls in front of his foot. Just as the shot changes, however, the gun is to the right of his foot (without him moving) and his foot pushes it aside as he runs away.
Continuity mistake: When Alice opens the back of her van and Carol sees all the dogs, a large spotted dog starts to come towards them - but when the shot changes to from inside the van, that dog is no longer there.
Homeless for the Holidays - S3-E10
Continuity mistake: Nick the dog is standing in the sink and Mark and Doug have got him just about completely covered in soap. The dog jumps out and runs out of the room - by the time he reaches the hall, only a couple of seconds later, the soap has almost completely disappeared.
Stuck on You - S5-E6
Continuity mistake: The patient, Mr. Levy, is talking to Carol and her assistant, and as he says, "I have sugar diabetes, hello!" his left arm goes down to his side. But in the next quick shot, both his arms are folded over his chest under his overcoat.
Continuity mistake: Benton is talking to Carla about her preganancy test and they go through the double doors to the snowy outdoors. Carla has nothing in her hand when she pushes the doors open, but once outside she is holding a hat - she wouldn't have even had time to pull it out of her pocket.
Continuity mistake: When Mark is having breakfast with Rachel and they are talking about skating, her table napkin, which was under her left elbow, falls to the floor. However, the next shot shows it back on the table, with her knife on top of it.
Do One, Teach One, Kill One - S2-E3
Continuity mistake: Near the beginning of the show, Susan is talking to Kerry while holding baby Susie and a stuffed Sylvester the cat; the toy is in a different position in each shot and in the last shot it has disappeared altogether. As Susan walks away, the toy is in the diaper bag, although we never saw her put it there.
Be Patient - S6-E15
Continuity mistake: Near the end of the show, Mark is talking to his father, who is putting his bathrobe on; he has one arm in the sleeve but as Mark says, "I need to talk to you", his father turns towards him and the bathrobe is nowhere to be seen - a couple of seconds later he starts to put it on again.