Black Blood - S1-E1
Other mistake: All the Greek name variants are used over the Latin ones - including even "Odysseus" over the more familiar "Ulysses" (who is the same person). However when the story of Actaeon comes up, it's suddenly the goddess "Diana" that he saw. But all the gods have their Greek names, so that should be "Artemis." (As indeed is used in episode 2). (00:39:35)
Other mistake: Chun-sik is standing next to a sweet stand talking with the vendor. Whilst he is saying "You know, I was quite skilled with swords back in my days", he is shown holding some bread, but he is not shown eating it nor is he shown taking a bite. The vendor then starts saying talking and Chun-sik still does not eat any of the bread, but then he is suddenly shown chewing, even though he never took a bite out of the bread. (00:07:15)