Continuity mistake: As Mark futilely pounds on Jodi O'Brien's chest, Carol can be seen in the background, removing her protective glasses with one hand. However, after the time of death has been called and they're showing the reactions of everyone present in the room (Susan, Carol, Carter, Lydia, Chen), Carol is seen taking the glasses off again, this time with both hands.
Continuity mistake: Peter goes into the operating room, demanding to help with his mother's surgery. When he goes in, his cap is pulled down over his hair, but when he is talking to the surgeon in charge, about an inch of his hair shows for a couple of shots. The surgeon orders him out, and he leaves, and his hair is completely covered again. At no time did he adjust the cap.
Continuity mistake: Doug and Peter are running to meet the ambulance transporting the boy with the crushed leg. From the back we see Doug with his arms out as he runs, but the shot changes to the front and he has his hands in his pockets, with no time to change naturally. (00:10:40)
Continuity mistake: As Doug Ross sits with the little girl Kaneisha who is sleeping, her bedcovers change position noticeably in one shot, and then back to the way they were in the next. In the same shots, Doug's ID also changes from being completely noticeable to almost completely obscured, and then back again.
Continuity mistake: Carol and Carter are in the room with the patient Tatiana and the dog; Tatiana has a yellow marker in her hand. In some shots she appears to be hugging the dog and in others drawing something with the marker, with no time to change positions. (00:21:50)
Visible crew/equipment: In the last scene there are three doctors standing in the corridor (I think it's Ross, Carter and Benton). You can see their tape marks for where they need to stand. When the camera pans out it pans too far and you can see where the corridor floor ends and the studio floor starts.
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.
Other mistake: When Jodi O'Brien is having seizures during the birth, Dr. Greene decides to take the baby out prematurely. Complications result and the woman dies, they show a shot of a clock in the background and it says 7:00, but when they say the time of death they say 6:02.
Other mistake: When the patient Isadore is brought in, early in the show, he is transferred from the stretcher onto a table, and we can see him deliberately move his right hand out of the way of the other actors moving him. He is supposed to be unconscious and very seriously injured so would not have done this is real life.
Continuity mistake: Susan and nurse Connie are talking to the fraudulent doctor - Susan has her clipboard at waist level and is lifting one page up with her right hand. The next shot shows her holding the clipboard down at hip level and both hands are on it. There was not enough time for the change.
Continuity mistake: Carter, referring to the patient Isadore, announces that he can't find a pulse in his leg - as he says this, his stethoscope is around his neck. Doug orders him to find a surgeon and suddenly the stethoscope is in Carter's ears, but there was no time for the switch.
Continuity mistake: Near the start of the show, Susan rushes into the ER with Chloe who is in labour. Carter is sitting behind the desk and he tips back, falls over, and takes his coffee down with him. Then he is suddenly standing there with a wheelchair for Chloe and he also hands Susan a mug of coffee from the counter, which somehow just appeared there. All this took place in 6 seconds, which couldn't have happened in real time.
Continuity mistake: Doug introduces his girlfriend's son Jake to old girlfriend Linda who is holding her coat over her arm with her hands clasped together. As she says hello to Jake she puts her hand up to her hair, but from his angle we still see her hands together. This continues for the next couple of shots as they chat.