This episode of the new series with unprecedented access to Birmingham Children's Hospital explores the 'superhuman' qualities that parents can develop when their children need them. It follows mums and dads who surpass all expectations and whose lives change for ever. Rob, who's 55, has swapped life on the road as a long-haul trucker for glitter, princess outfits and repeated viewings of Frozen after becoming the primary carer for his four-year-old daughter Chelsea. Chelsea was born with a serious kidney disorder and has spent more than 200 nights of her life in hospital. She had a transplant last year, and Rob is balancing his constant worry about Chelsea's health with a new sensitive side and happiness he'd never imagined he could have.

Most parents dream big for their kids, but when your child's health is in question, all of that changes. Priorities shift as events threaten to change their futures forever. This episode follows parents rapidly adjusting their hopes for the future in the face of potentially life-threatening accidents, and another mother refusing to abandon her hopes for a son who urgently needs an organ transplant. Twelve-year-old Mollie is brought to A&E by ambulance after being knocked over by a car on her way home from school. Until Mollie's parents arrive, Dr Kate has to be mum and dad as well as treating her injuries.