Audio problem: Deok-mun is approached by Eugene. There is a shot focusing on Eugene where Deok-mun can be seen in the corner of frame, where Deok-mun shouts "Is that why you came barging in here? This is a minister's residence." The movements of his mouth do not match up with the dialogue that is heard. (00:07:09)
Episode #1.5 - S1-E5
Audio problem: Whilst An-pyeong and Lady Yun are talking about Eugene confronting them earlier, Yun says she's going to send a telegram to Hui-seong. She then starts to say "I should tell him to stay away from Joseon for the time being" and then the camera cuts to an angle behind her where she finishes the line. Yun then says "What if he stays in Joseon" whilst the camera is behind her, but her mouth isn't shown moving. (00:16:44)
Episode #1.2 - S1-E2
Audio problem: When Dong-mae and his men leave after searching the house, Su-mi is still holding onto the baby after leaving. The baby is heard crying, but there is a brief moment where she shakes her to calm him down, and we can see the baby's eyes when she does so. In the brief instance where we see the baby's eyes, she does not appear to be crying, indicating that the crying sounds were dubbed in afterwards. (00:45:05)