This week the series focuses on the bond between parents and children and features the youngest patient ever featured on the series and what happens after the roles have to be reversed due to illness. Three-month-old Jaziah has been rushed to resus with breathing difficulties. He's severely underweight and has an enlarged liver. Consultant Jacqui needs to act fast to keep Jaziah alive, while his mum, Kenita, can only watch as the specialist paediatric team is called in to assist. Doctors are concerned that Jaziah's swollen liver signifies that there's a problem with his heart and that he may need immediate surgery to save his life. Meanwhile, in paediatric A&E, 18-month-old Charlie's mum Kerry is waiting for urine test results that could explain why he's been feeling unwell for five days. Ronald, who's 81, has been brought to King's by his daughter Tracey. He's had a suspected stroke, which is affecting his speech. He needs a CT scan to assess how serious it is and what his hopes of rehabilitation are. Registrar N'daba has been working with stroke patients for many years and has seen how quickly the parent/ child relationship is reversed. And as night falls, 19-year-olds Emily and Amber are waiting for news on Charlie, who they brought to the hospital after he hurt his hand. They've never met him before, but didn't want him to have to come to the hospital alone.