Episode #1.3 - S1-E3
Other mistake: Dong-mae is standing atop a balcony, several meters above ground. Yet he is able to fully hear a conversation that two men are having about Ae-sin whilst they are on the ground and standing far away from the building he is in, without any of the other people or market stalls drowning out the sound. (00:16:59)
Other mistake: The woodchipper is shown cutting wood, but is squeaky clean when the golfer sticks his hand in it to get the ball out.
Other mistake: The Seattle Police officer's badge states Seattle Police, but the patch on his jacket states Metropolitan Police. (01:15:00)