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.
Answer: It was in "Chaos Theory", the first episode of season 9 (time code 00:13:55).
Super Grover ★