Episode #1.1 - S1-E1
Factual error: The American flag shown waving outside the White House is the current present-day flag with 50 stars. From 1896 to 1908, (the time period that this show is set in) the US flag only had 45 stars as Oklahoma, New Mexico, Nebraska, Alaska and Hawaii were not recognised as states in that time period. The flag did not have 50 stars until 1960. (00:04:30)
Factual error: When Eugene is searching through the drawers for the list of Joseon mobs, a book with Yogi Berra listed on the spine can be seen on top of the drawers. Yogi Berra didn't begin his baseball career until 1946, and he wasn't even born until 1925, over 20 years after this episode takes place. (00:18:40)
Factual error: Joseph is given an American military funeral. The coffin, when placed in the ground, is shown with an American flag placed on top of it. Eugene sprinkles some soil over the coffin (with the flag on top of it), however burial flags are always removed prior to the actual burial, folded and then handed to the next of kin, so the soil he sprinkled would not be included in the actual burial. (00:29:10)
Episode #1.1 - S1-E1
Factual error: In the flashback that shows the fate of Ae-sin's parents whilst Ae-sin is a baby, several characters can be seen using a Mauser C96 pistol. These include the father when he tries to shoot Wan-ik, the mother when the soldiers come for her, and the man standing beside Wan-ik who shoots the father. The flashback takes place over 20 years before the main story takes place, which would have set it in the 1870s, but the Mauser C96 pistol was not first designed until 1895. (00:56:10 - 00:58:03)
Factual error: Ae-sun is shown carrying a bag filled with gold bars with virtually no struggle. Gold bars are heavy, and carrying around an entire bag filled with them, without struggling, would be extremely difficult to do. (00:08:44)
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)
Factual error: On the wooden globe in Eugene's office, China is listed with the name "People's Republic of China." This name was not first proclaimed until 1949, whereas this episode takes place in 1903. (00:27:28)
