Supernanny is called to deal with a food-phobic seven-year-old. But it's only when she witnesses a mealtime first-hand that she realises the extent of the family's problems. Heather and Alex Bixley live with their sons Brandon (7) and Zak (4). Brandon developed a negative relationship with food after having gastric flu as a baby. What started as fussy eating has become an obsessive fear that dominates family life. After six years of non-stop battles with Brandon, Mum is at breaking point, but Supernanny has some harsh words for her and Dad. She's horrified by the way they aggressively try and force Brandon to have food he doesn't want, and tells them they've got no chance of turning things around until they stop fighting between themselves. Supernanny introduces a menu of innovative techniques to change the boys' relationship with food, including her renowned 'little chef' technique - but the biggest hurdle is the bickering Bixleys themselves.

Jo Frost really has her work cut out when she meets Stuart and Laura, a kick boxing couple, and their three kids, five-month-old Diesel, two-and-a-half-year-old Tegan-Olivia and five-year-old Matthew, whose aggressive and violent behaviour often leaves mum battered and bruised. When Supernanny arrives she sees how bad the situation is. After laying down some household rules, Supernanny introduces a special 'work out your anger' chart and a chill-out chair to tackle Matthew's tantrums. Supernanny then encourages mum to let go of the reins and allow Stuart a more active role with Matthew, before leaving them to implement the techniques by themselves. It all goes well at first, until Matthew stages an epic one child riot leaving the house looking as if it's been burgled.

The Woods family from Grantham call upon Jo for her expert advice and no-nonsense approach to child rearing. Their youngest child, two-year-old Charlie, is a raging toddler who is destroying and dominating family life with his out-of-control behaviour. Desperate times call for desperate measures; mum Lucy and dad Steve are determined to turn their lives around and adhere to the strict guidelines Jo has laid out for them, Charlie and their older children Billy and Caitlin. But even Jo, with 16 years of no-nonsense nannying and childcare practice behind her, admits it is going to be a challenge. 'I have never seen a boy run riot and control his family like he does... I am shocked to see how you have allowed him to become this bad.

Thirty-three-year-old Michelle Ball lives in South London with her two sons, three-year-old Ryan and one-year-old Kyle. Michelle used to be an outgoing woman brimming with confidence and ambition. A Latin dance champion, she lived life to the full. But four years later she's a full-time mum and things couldn't be more different. Even though he's three, Ryan is still in nappies, acts like a baby and is violently jealous of his little brother Kyle. Even with Gran's full-time help, Mum doesn't have a minute for his baby brother, and even less for herself. Can Supernanny Jo Frost put an end to the misery and give Michelle her life back? Jo shakes up the household by sending Gran away, enforcing a strict routine, stopping Ryan demanding to be carried all the time, getting rid of the dummies and nappies, and imposing a proper bedtime routine. Things pick up until Supernanny finds Michelle in floods of tears.