Board Thread:Show-Related Questions and Answers/@comment-3407907-20140929024703/@comment-24158541-20140929041747

Zoso returns in episode 4 and most likely it's going to be a flashback. After what Sonofaphrodite had said int he comment above being Merlin's hat. I then started thinking, Merlin was Zoso's apprentice a.k.a. the mystery character in season 4.