The Curse of Cornelius Sigan (S2E1)
Merlin’s jealousy was phenomenal. But ah, Arthur is such a stubborn idiot, he can’t talk about his feelings. Even his father was more emotional, showing his concern for his son and running to him when Arthur was injured and everything.
After the Doctor Who season 7 final it was quite funny to hear John Hurt as the Dragon.
And Gareth Keenan, your true identity is out! Your secret is discovered! Merlin should have fought you with some jelly and stealing your stapler.