Season 1: Episode 13: Le Morte D’Arthur
A fantastic episode to end the season, that was one angry dragon at the end, the chain of events in this episode was brilliant, Merlin saves Arthur, Gaius saves Hunith and then Merlin saves Gaius, the goodbye Merlin sort of said to Arthur was great to see and was funny also. As season-enders go, this one seemed to be less than cliff-hanging until the final 10 seconds with a Morgana... what? And a very angry dragon.
I am very much looking forward to season 2 of Merlin