Well I thought this week's was really good. Ok Arthur shouldn 't be listening to Agrivaine (who's obviously taken eevviilll lessons of Morgana) but it was a good episode about how being the prince is easy, being the king is hard. Gwen actually had something to do, as did Morgana (Katie McGrath is looking more smouldering by the week.) and there was some really good interplay between Arthur and Merlin.
Oh and I loved Lindsey Duncan's parting words to Morgana. She is definitely Uther's daughter.
It's a shame we didn't see the actual execution, or even cut away as it was happening, but guess that might have been too dark, and it's odd that the queen changed her mind so easily. And I do wish Arthur had won on his own, ok Merlin counteracting Morgana's magic so it becomes a fair fight, but then essentially Arthur would still have died if it wasn't for Merlin, which always seems to detract from Arthur's strength.
Good episode though, and next week's looks fun!