Gina Rinehart tops Australia’s rich list, worth almost $40bn. She’s also a climate sceptic, a Trumpette and a litigant – even against her own kids. Her life reads like a script from the TV series Succession. Senior correspondent Sarah Martin has spoken to her critics and her defenders to try and understand who Gina Rinehart really is. In this episode, Martin starts with her childhood, and the enormous influence of her father, Lang Hancock