Continuity mistake: Carter makes an upward motion and grabs Angel's paper cup of booze from her - but in the next shot there is no sign of the cup and he is holding a clipboard. There was no time for him to get rid of it.
Continuity mistake: When Carter first starts to confront the drunk patients Angel and Nathan, the door to their room is open behind him. Angel falls to the floor and the shot shows the door is now closed. The shot goes back to Angel laughing and the door is ajar again. Then it's closed again, and then open when Susan comes into the room. All this happens within a few seconds.
Continuity mistake: When Vuselich is lecturing Peter about his medical study, and we see Peter's face, his cap is pulled down over the top of his ears. When the shot is on Vuselich's face, we can now see the tops of Peter's ears. It continues like this for the whole scene.
Continuity mistake: When Doug is outside with his father, and the shot is on Ray, we can see a lot of snow in the air, but when the camera goes to Doug, there is no snow at all. The snow distribution on his father's coat change from shot to shot as well, too much to happen in only a Split Second.
Continuity mistake: Susan is at home, making drinks for Mark and her - she pours them drinks from the blender and leaves a little bit of liquid in the blender. They head for the living room and the blender suddenly has about 3 inches of liquid in it.
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.