Revealing mistake: As Dr. Benton is leaving the nursery, there are two people who are supposed to be walking down the hall. But, it is very obvious that they are waiting on their mark, waiting for the go ahead before they start walking. (00:38:40)
Continuity mistake: Near the beginning of the show, Lucy and Roxanne are in the restaurant, and as Roxanne says "so much for that theory", we can see Lucy is holding up her book/magazine in the corner of the screen, but in the next shot it is lying flat on the table.
Answer: It was in "Chaos Theory" which is the first episode of season 9 (time code 00:13:55).
Super Grover ★