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: When Mr. Haengrang is lying on the ground after being shot, there are tiny drops of blood visible on his face, presumably blood splatter after getting shot. However, when he was shot just seconds earlier, all the gunshot wounds he received remained inside his clothing and there was no blood splatter of any kind shown, so there is no way any blood could have splattered on his face. (01:18:30)