गूफ़

At various instances, the incorrect sword type is used by Geralt. Geralt carries two swords: the dark-hilted sword with Renfri's broach on the crossguard is made of steel while the white-hilted sword is coated in silver. It is established that only silver works against monsters, especially for ensuring a killing blow. This straight-forward rule is not followed in various episodes of the series despite being mentioned in the first episode (and in latter episodes as well).