Continuity mistake: Mark is showing Lucy around the hospital and they go from an examination room to a trauma room - as they go through the doors, Mark is in front and pushes open the right door and we see it stays open. Lucy never touches it. But the shot showing them coming into the room has Mark letting go of the door and it swinging shut.
Continuity mistake: Carter and Lucy are standing in the middle of the admitting, where they are talking about a case. Lucy asks, "Does it resemble a Christmas tree?" and Carter's stethoscope goes from being visible over his lapel to being tucked under it.
They Treat Horses, Don't They? - S5-E3
Continuity mistake: When Peter and Elizabeth are in the locker room having a serious talk, Peter's tying his tie - but when the shot is from behind his shoulder, his tie is completely undone. When the shot is on Elizabeth, it's partly tied. This continues for a few shots.
They Treat Horses, Don't They? - S5-E3
Continuity mistake: Doug, Mark and Carol are in the lounge having pizza and Doug has just told them he's the new Pedes ER Attending. Carol asks Mark, "Aren't you thrilled?" Mark is holding a paper cup. A Split Second later, his cup's gone and his hands are apart in front of him. Doug says, "He's got his doubts," and now there's a cup in Mark's left hand.
Masquerade - S5-E5
Continuity mistake: When the med students throw the burning armchair over the balcony it tumbles down the steps, crosses the landing and continues to roll down the second set of steps to within a foot or so of Carter and Bernie. The next shot shows it on the landing again, and then tumbling down the last few steps again.
Masquerade - S5-E5
Continuity mistake: The patient Coco is sitting up in her bed talking to Mark about the drug he gave her. From one camera angle her hands are in front of her, but from another her hands are behind her.
Masquerade - S5-E5
Continuity mistake: Carter suggests Lucy find the drunken patient a detox bed and the pile of books, files and fake arm she is carrying shift position from one shot to the next.
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.
Stuck on You - S5-E6
Continuity mistake: Near the start of the show, Lucy goes into Carter's room, putting her backpack on the bed and disturbing his girlfriend. She then turns and rushes out of the room, and her backpack is on her back, even though she didn't have time to put it there.
Continuity mistake: Mark asks the fireman if he can crash there for the night. His hat and the magazines on the table change position from shot to shot.
Continuity mistake: When Carter and Kerry are in her kitchen and she is making something in the blender, the level of liquid drops a few inches even though she doesn't pour anything out of it.
Continuity mistake: While talking to Carter in her kitchen, Kerry's hand goes from on the counter to on the blender with a lid that comes from nowhere.
Good Luck, Ruth Johnson - S5-E9
Continuity mistake: Carol is in Wilson's room writing on the center of his chart. When the shot shows her turn to answer Wilson, her pen is writing near the edge of the chart. She didn't have time to change the pen's position so quickly.
Good Luck, Ruth Johnson - S5-E9
Continuity mistake: A policeman is in the ER talking about the little boy who was shot. He gives Carol a schoolbook with the boy's name in it. She looks at it and asks, "What about Wilson's family?" and then closes it - then as the cop answers, "Workin' on it", we see her closing it again.
Good Luck, Ruth Johnson - S5-E9
Continuity mistake: Carol is talking to Wilson in his room and she says, "I'm sad about what happened to Andy". As she says this, her arm is stretched out and her hand is on the bed railing. The next quick shot shows both her hands are holding his chart.
Good Luck, Ruth Johnson - S5-E9
Continuity mistake: A detective goes into Wilson's room to talk to him, and Carol joins them, sitting near the end of the bed by Wilson's feet. A couple of shots later, as the detective talks to him, Carol is suddenly sitting by his knees, even though she never changes positions.
Continuity mistake: Peter and Dr. Romano are in the operating room arguing about Romano's lack of sobriety. Over the course of less than a minute, the clock on the wall goes from 8:15 to 5:15.
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.
Nobody Doesn't Like Amanda Lee - S5-E11
Continuity mistake: When Chuni gives Peter, Gwen's chart, there is a narrow strip of paper over the other sheets. But when he goes into the girl's room, that strip of paper disappears.
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.
Answer: A man named Paul Sobriki comes into the ER in the season 6 episode 13 " All in the Family." He is complaining of headaches, Carter and Lucy decide to rule out meningitis and do a lumber puncture. Paul struggles during the procedure and believes that both doctors are stabbing him. Lucy, who is interested in Psych thinks something is wrong with their patient mentally, but Carter is dismissive of her. She gets cross with his attitude and she calls the psych department anyway to have a look at him. Later on and near the closing 20 minutes or so of the episode, all the staff start playing loud music and get a cake which appears to be blue lol, together to party as it's Valentines Day, Carter returns from somewhere and asks where Lucy is. He goes to check one of the rooms for her and Paul Sobriki comes up behind him in the dark and stabs him twice in the lower back, he collapses and as he falls unconscious he sees Lucy on the ground also. In the next episode, Be Still My Heart (ep 14), Dr Weaver discovers them and all of the staff work to try and save them, whilst Carter survives. Lucy's wounds are fatal and suffers a pulmonary embolism as Corday and Romano try to save her. Carter is grief stricken and feels guilty about the way he treated her, he becomes addicted to painkillers and Benton, Greene all help him and book him into rehab.