Other mistake: After resusitation attempts fail, Lucy is left alone with a dead patient whose phone starts ringing. At that point we can see the "dead" patient's chest rising up and down as he breathes (and he's not on a respirator).
Visible crew/equipment: Lucy is shown getting a coat from under the desk. Yosh comes up to her and says something, then opens the door and walks out of the shot. When he opens the door, there is a reflection of a man wearing headphones and holding a boom mic.
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.
The Good Fight (a.k.a. A Perfect Match) - S5-E8
Factual error: At the beginning of the show, Doug states that even though it's November, it's never too late to golf. A lot of this episode's scenes are outside as Lucy and Carter run around looking for a patient's father - the flowers are still blooming and the trees are full of green leaves, with only the slightest of autumn foliage, and few dead leaves on the ground. Considering the locale of Chicago, it looks like mid-September, certainly nothing like November.
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.
Answer: It was in "Chaos Theory", the first episode of season 9 (time code 00:13:55).
Super Grover ★