User blog comment:Morganaforever/Episode Review: The Diamond of the Day Part 1/@comment-5253758-20121222205654/@comment-5253758-20121222210817

But, he won't stay old (I hope)! He will become Merlin again. In the preview it was Merlin that said "I am a sorcerer, I have magic" not old Ermys.

How do you know that he will stay old?