White teeth, anyone?

I liked most of this series very much! It was quite different from the book in many ways, but in most cases it was obvious that what worked in the book would seem awkward on screen. However, my VCR decided to skip the bit between when the police starts going after the animal rights group in the van, and when Joely and Josh arrives at the launch. So I would really appriciate it if someone could tell me what happened with the police and where the rest of the group went, since I don't recall this being in the book.
And does anyone know why the English middle class family of the story was named Chalfen in the book and Malfen in the series? There must be some reason.
How come nobody's started a discussion on this one yet??