User blog comment:Ḡwẵine Ḹٍٍkƨ Ĺiĸe Ͼềлȑềd/WORST plot hole in the HISTORY of 'Merlin'/@comment-4623180-20121014122211/@comment-4190137-20121015061453

It's a plot hole because if they never explain it's a part of the plot and there is no indication that it is, it's classified as a plot hole...

It's like, once Firenze (the Centaur in the first and the last few ones) returned in Harry Potter, if Harry acted like he didn't know who Firenze was, it is a plot hole.