The Ringer - S1-E1
Revealing mistake: All the Moblins are shown to have one of their bottom teeth sticking up out of their mouth longer than the others on the bottom of their mouth. And in all of them the long tooth is on the right side of their mouth. When one charges Link, you see it's reflection in Link's sword, yet despite it being a reflection, the long tooth is still on the right side of the Moblin's mouth. (00:02:45)