I think pointing a finger at Julie is quite shocking. She may be a lot cleverer than Karen, she may in fact have a high IQ but circumstances prevented her from fulfilling her potential in life. Whatever else, she came across as a natural leader and someone who would fight injustice whilst still remaining loyal despite what her friend had done. Karen was thought by the police to be an excellent actress (real Karen).
I have come across people who, although they had a below average IQ, had a high level of cunning.
All the actresses played their parts brilliantly and although I was in two minds about watching it because the children are out there under new names, I was glad I did. I wish them well in their new lives.
It has been reported that Karen has a new boyfriend and would like another baby, let's hope she will be a better mother now if she does.
I believe the step-father knew more than was portrayed - I thought the plan was that he would meet Shannon on her 'release' from captivity.
I don't think he was charged, was he, so the BBC would not portray that.