The Case of the Sleepwalker's Niece - S1-E2
Revealing mistake: The carpets in the sleepwalker's house looked like they're unfolded tarps. There are noticeable folds in the carpet that looked as if a folded cloth had been unfolded but the creases were still there.
The Case of the Substitute Face - S1-E32
Revealing mistake: While Perry and two other men are drinking brandy at a table onboard a ship, stock footage of a storm at sea is shown. To simulate the rocking motion of the ocean, the camera slowly tilts from side to side. This is obvious because the surface of the brandy in the glasses also tilts. If the ship were really rocking, the surface of the brandy would remain horizontal.
