Continuity: In Episode 17 (A Bloody Mess) Lizzie sees Dr. Morgenstern for the first time in the ER and she asks Kerry, "Who the hell was that?", and Kerry answers, "Our Chief of Emergency Medicine." Yet when he resigns in Episode 19, he tells Peter he's resigning as Chief of Surgery. Unless he held both positions, Kerry's answer could not be considered a character mistake, as she would have known what his position was.

Continuity: Mark is intubating the man who is paralyzed from the neck down. We can see his hands working - we know it is him by the splint on his wrist and he is talking as he works. However, Malik comes in and calls him away, and he rushes off, but the hands working on the patient don't change.

Continuity: When Jeanie and Al are in the diner, when she spears a piece of fruit on her fork, Al has his hand on his hip. However, when the shot changes and she says, "How about your grandmother?", his hand is up on her shoulder.

Continuity: When Anna leaves the little boy Skyler's room, she has his chart under her right arm - but when she gets through the door and joins Doug in the hall, the chart has transferred to under her left arm, with no time for the change.

Continuity: Oliver, the brain tumour patient, is talking to Anna, Henry, and Carter. He has his right arm up on the bed railing - but as he says "cook", his arm is suddenly down in his lap.

Continuity: When Kerry is talking to Doug about his fellowship proposal, his stethoscope moves a couple of inches higher on his neck, even though he never touches it.

Other: When Doug and the nurses are watching the TV about a motorcycle accident, Kerry comes along and calls him Mark. This could be a character error, but as Doug responds 'yeah', and they talk, it indeed becomes a production error. In real life, the person would have corrected her.

Revealing: When Greene and Benton are at the coffee stall, Greene calls Benton "Eriq," which of course is the actors real name.

Continuity: 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: Near the start of the show, Peter is holding baby Reese upright when he opens the door to Carla's room, but as the shot changes to show him coming through the door, suddenly the baby is lying horizontally in his arms.

Continuity: Carter is talking to Carol about his grandmother. The shot is mainly on her but we can see him put his pen away and pick up a chart - then the shot goes to him and we see him do the same thing again.

Audio problem: When Greene is outside by the river explaining what happened to him, there are a couple of really bad sound edits in the background noise. These are really obvious as the sound suddenly changes, and for some reason the background noise in this scene is very loud, almost as loud as the dialogue; very strange.

Continuity: 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.

Continuity: Peter, Elizabeth, and Romano are with the little boy who has organ reversal and as Romano says "genetic breakthroughs are in the wings", Peter puts on one glove. As Lizzie asks him if something is wrong, he is putting on the glove again. As they continue to talk, he begins to examine Rodney, but when the shot changes, he is still putting on his gloves.

Continuity: When Peter comes in to talk to Rodney's father Isaac, the clock on the wall says 11:40 - which it had also read a few scenes earlier when Rodney came out of surgery. After Peter checks the chart and starts to talk to Isaac, the clock has somehow changed to 3:30.

Continuity: When Carol goes to get Doug to see the sickle-cell patient, the clock reads 3:50. The next few scenes include Rachel arriving at the hospital and being taken to the dentist and for a dual makeovers by Cynthia. When Mark is walking by the same clock with Herb the lawyer, it reads 2:30. He then says goodbye to Herb and his ex-wife arrives to pick up Rachel, who is now back in the ER with Cynthia. The clock times do not reflect the sequence of scenes.

Continuity: Near the start of the show, Carter gets a can of soft drink from the machine and just then his cousin Chase shows up in the ER - they hug and somehow the can, which should be in Carter's hand, has disappeared.

Continuity: 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.

Continuity: 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: When Jeanie is in the office with Kerry, Anspaugh, and the union rep discussing her firing, her stethoscope changes position over her name tag several times within a few seconds.