MORDRED! They have to bring Mordred back in the show; they have a kind of promised it, when the dragon told Morgana and Mordred will be united in evil, right?

... And it's one of the only stories they haven't told yet. Arthur is king, Guinevere is his queen, he has got the knights, his father is dead, he has pulled the sword out of the stone, the betrayal is finish... I only think we miss Arthur knowing about Merlin's magic, and to see our little beloved and evil druid boy Mordred again (of cause together with Morgana)! ;)

Gilli cause Morgana had Mordred, Merlin also needs some magical help

Mordred is awesome. Gilli was just brought in so Uther and Arthur could try to kill each other.

Lol, how dumb would it be if Mordred never came back?