Continuity mistake: When Mark and Elizabeth are coming round the corner to enter the hospital, Mark says, "Remind me again why you invited her to stay with you", and he has one arm around her and in the other hand he's holding a newspaper. As the shot changes when they go round the corner, his arm is no longer around her and both hands are on the newspaper. There was no time for the switch.
How the Finch Stole Christmas - S6-E9
Continuity mistake: When Romano is operating on the heart patient Valerie, Lucy has an instrument inside the patient. The shot then changes so that we can see her face and as she says, "Dr. Romano," there is no longer anything in her hand and she is holding it up waiting for a nurse to pass her an instrument, which she takes, but then the shot goes behind her - she now has a different instrument in her hand, which is in a different position.
Continuity mistake: When Carol and Luka are sitting in Wrigley Field she has a Diet Coke can in her hand. But when she goes to stand up, she leans down and picks up the can of Coke from the floor - even though at no time did she put it down there.
The Peace of Wild Things - S6-E6
Continuity mistake: An elderly patient is grabbing at Dr. Lawrence's hands and crying, "Help me." He pulls his hand out of her grasp, but in the next shot we see him pull it away from her again.
Greene with Envy (a.k.a. Lawrence of Northwestern) - S6-E3
Continuity mistake: When Dr. Lawrence is tending to the patient with the stabbed wrist, the blood splatter on his lapel goes from bright red to brownish and back to red within a few shots.
The Peace of Wild Things - S6-E6
Continuity mistake: When Peter is doing the DNA test on Reese, the little boy's hands alternate from being behind him to being in front of him throughout the scene with no time for natural change.
Continuity mistake: After Carter pulls the IV out of the patient who was allergic to sulfa, Malik asks, "Where's all the blood coming from?" and we see the patient's arm outstretched, bleeding from where the IV was. Carter says, "She must have pulled the IV out", and we see her arm folded up over her stomach - there was no time for the change in position.
Continuity mistake: After saving Mr. Perez, Carter says "That's a nice save" to Mark, and takes his stethoscope out of his ears and wraps it around his neck. The next shot, however, from behind him, shows the stethoscope is still in his ears.
Last Rites - S6-E2
Continuity mistake: Carol puts a chart on the counter and says, "I need 2 mgs of morphine for Mrs. Bragha", and Doctor Dave signs, with both arms on the counter when the camera is on Carol. But when the camera is on him, he has has one hand on the counter and one arm down by his side. This happens for a few shots.
Continuity mistake: When Mr. Perez pushes Carter into the window, Carter's stethoscope is around his neck with the earpieces on the right. At one point during the fight the stethoscope is around his neck with the earpieces on the left - and then returns to the other position.
Continuity mistake: When Carter goes into the lounge, he leans his crutches against the lockers and then moves his bag off his shoulder. One crutch falls to the floor, then the bag, then the other crutch. When the shot changes to show these items on the floor, the bag is lying neatly on top of the crutches - an impossibility due to the way they all fell.
Continuity mistake: When Mark gets up from the snowbank and chases Elizabeth into the ER, his red bag is over his right arm. When the shot changes to show him entering the hospital, his bag is over his left arm - he wouldn't have had time to change it.
Visible crew/equipment: When Dr. DeRaad asks Kerry if she knows Paul Sobriki she tells him to check the board, and as Kerry walks past the door we can see the reflection of a crouched crew member walking backwards, pulling a rolling microphone stand. (00:02:45)
Visible crew/equipment: When Luka and Mark are questioning Amira about the knife Sobriki had used, Kerry walks in then tells Amira to go upstairs to get security to open the personnel office, and the green T-mark taped to the floor is visible near Luka's feet. (00:16:45)
Continuity mistake: While operating on Lucy, Kerry Weaver gets massive amounts of blood on her left sleeve, but when she is sent to the OR the sleeve barely has any blood on it.
Audio problem: The "swoosh" as the ball goes through the net is early.
Continuity mistake: When Cleo and Mark are playing basketball, when Mark shoots for the first time Cleo is standing to the left of the hoop - when the ball hits the rim it launches off the rim to the right, but in the next shot Cleo has the ball.
Continuity mistake: When Abby gets bitten she holds her wrist but in the next shot her hand is covering her upper forearm.
Continuity mistake: When Elizabeth and Mark are in the trauma room for the first time the blue X-ray coats they are wearing disappear instantly right before the camera pans behind Elizabeth.
Continuity mistake: During the opening credits, Carol is doing desk dury and says, "Hey, you're back" to Luca and her hand with a pen in it is up in the air. But when the shot changes, her hand is lying on her stomach. These alternate positions continue for a couple of shots.
Answer: Take care of your dad.