Revealing mistake: When Eugene receives his return orders, not only is it from the wrong Roosevelt, but above the Eagle, it says the "State" of Washington rather than being from Washington DC, which is not a state. (01:08:16)
Plot hole: After Ae-sin shoots Wan-ik and flees, Hina shoots Dr. Matsuyama with a six-shooter and plants the gun in his hand to make it appear as if he shot both Wan-ik and himself in a murder-suicide. However, Ae-sin shot Wan-ik with a rifle, meaning the bullets that were used to shoot Wan-ik and the bullet that was used to shoot the doctor were completely different bullets; the authorities would realise this when an autopsy on the two is performed. (00:26:10)
Continuity mistake: When Hui-seong is wondering if Ae-sin will come to him to hide, the cigarette he is holding is raised so that it is level with his chin. When the camera cuts to a wide shot, the cigarette is lowered to his side. (00:30:30)
Plot hole: When Takashi is rescued by the other soldiers, he finds a piece of red fabric on him. He then has a flashback to the scene where that same piece of red fabric fell from Hong-pa's body whilst she was hanging beneath the tunnel and realises they are both the same piece. However, when this scene played out earlier, Takashi did not see this happen. He was on top of the bridge and was being held at gunpoint by Eugene, so he couldn't have seen the piece of fabric fall from her body. (00:46:10)
Factual error: Eugene is given a return order from the President telling him to return to America. The name of the President listed on the order is Franklin D. Roosevelt, but he did not become President until 1933. In 1904, when the episode takes place, Theodore Roosevelt was the President. (01:08:16)
Plot hole: At the end of the previous episode, Ms. Haman is shot by a Japanese soldier. The shot is severe enough to make her collapse to the ground and fall unconscious. But in this episode, she appears perfectly fine without any sign of being shot, and without any injury in sight. (00:07:30)
