Season 1: Episode 1: The Dragon’s Call
This was a brilliant episode, Merlin and Arthur are quite good together, the second fight was great to watch and funny at times, Mary/Helen was just a crazy old woman, the best part was when Merlin found out what his reward would be. Yes, the show plays fast and loose with what is deemed to be historical truth. However, just like Robin Hood, it's not worth getting worked up about the inaccuracies