3/8. The [text removed] Family. Kathy is a young mum with two kids, a new man in her life - and a big problem. Seven-year-old Jay constantly clashes with younger brother Owen, but what starts as play-fighting turns nasty. In the current situation, Kathy feels powerless to make the boys listen to her. Enter Dr Tanya Byron with a new perspective on Jay's aggression. Can she help Kathy to assert her authority?
Producer Miranda Michaelis ; Series producer Sacha Baveystock
First shown on BBC3