I watched this while on holiday and was quite literally blown away.
I knew a little about the book (i'd read half of it on holiday before accidentally leaving it in hotel room) and what I'd remembered seemed almost identical to what was realised in the film.
The story flicks back and forth between Alice in the modern (played by the excellent Vanessa Kirby) and Alais her medieval counterpoint (played by Jessica Brown Findlay- Lady Cybil from Downton Abbey.
The subject matter (the quest for the Holy Grail) could easily have been silly but somehow everything feels very convincing and real. It is a little violent at times but it was a violent period so I suppose it had to be.
There are a lot of characters in the story so there's a lot to take in in episode one but it all builds up to an amazing battle that looks like it was made for cinema instead of TV.
Overall amazing TV that really took me by surprise. Now I want to read book again.