I have just watched this episode for the first time and was suprised to see how much I liked Merlin by the end considering how obnoxious he was in part 1.
I feel bad for the poor guard who was a guinea pig for Morgana's new weapon and like the way they link in firearms as this new and highly destructive weapon. Certainly plenty of Macgyverisms for season 7 which I find lacking when compared to earlier seasons. When you have a new historical period there are plenty of new opportunities for ingenuity with the technology and knowledge of the day and this episode did not disappoint.
I could read the wall marking fine without a mirror so a bit of a waste of time there. It was most fortunate that all the lightning was focused purely around Morgana's castle, but I guess this belongs more in a nit-picking thread
Not a major fan of the dream episodes but out of all of them, this is certainly the best.
For me personally it was much more enjoyable than part 1 and overall not a bad couple of episodes as I am a fan of the King Arthur legends.
Personal score: 3/5