Kelvin Harrison Jnr treads the line between perfect student and perfect demon with some aplomb in this film. Naomi Watts and Tim Roth also provide a credible set of parents facing problems with both their (adopted) son and with their own relationship. Octavia Spencer stands out too - but I have to say, I don't find there to be much cohesion here. Certainly, the threads address issues of racial and gender stereotyping, but they don't intertwine in any particularly convincing way. I had to make quite a number of assumptions to make any sense of the ending - perhaps that was the plan - but it lef...