Preview of episode 5, Listener

So far the series has been pretty good, forgivable tangents to the book, a little lighter than the books portray but over all entertaining for a fan of the books. But this latest episode was a very disappointing, (In my honest opinion) simply due to the early introduction of the sisters of light! They are not mentioned in the 1st book at all and the journey to them was not an easy trip at all. This easy trip to them to drop off a 'gifted boy' will make the future books hard to capture the essance of the story.
I hope this is somehow rectified later, the general public are not stupid and although the US like to treat their audience as if they are sometimes by OVER simplifying things, surely they must realise with so many books being read worldwide, the story does not need to be tampered with in this way.