Sand and Water (a.k.a. Way Too Soon) - S7-E2
Continuity mistake: When Mark is standing in his kitchen talking to Elizabeth, the position of his hand on his cereal bowl changes from shot to shot.
Continuity mistake: When the man who was hit by a driver while on his bike, was being taken to the trauma room he is bumped by someone and blood starts spurting everywhere, including on Maggie, who is wearing Abby's coat. In the very next frame, the coat is clean with no blood on it at all, with no time for Maggie to have changed the coat.
Survival of the Fittest - S7-E17
Continuity mistake: When Carter is talking to the boy who has asthma, at one point he says something like "I'm trying to help," notice the tube is not in the boy's mouth. The angle then changes, and he is holding the tube in his mouth instantly.
Surrender (a.k.a. Inside Out) - S7-E12
Continuity mistake: When Weaver is leaving her hose the "snow " on her head disappears in the long shot.
Continuity mistake: When Carter and Abby drive up to the motel that Maggie is holed up in in Oklahoma, the rental car they are driving has no front license plate. When they pull up to Abby's apartment the next evening, in the same rental car, there is a front plate on the car and the plate is from Illinois.
Continuity mistake: In the scene where Dr. Benton is getting Reese ready for day care in the staff lounge and is talking to Dr. Finch, the shot shows Reese with his left hearing aid out of his ear, hanging down then when the angle changes it shows his hearing aid back in his ear without Dr. Benton putting it back in or touching it at all. (01:33:45)
Continuity mistake: The timeline makes no sense. Carter goes home early and is working out in daylight at home. Kerry needs to leave at 6pm and Mark has a hockey game at 8pm. Luka and Abby are out on a date, after dark, when they are mugged, next Mark is at the hockey game. But shortly after, Kerry is getting ready to leave when Carter comes back to finish his shift. After that, Elizabeth is back in the ER working. Nothing in this timeline makes any sense.
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.