As Sam Altman returns to run OpenAI after his sensational firing just days earlier, why is the idea of the charismatic founder so appealing in Silicon Valley? Why are they often men? And do some tech firms now look more like cults than companies?Guests: Walter Isaacson, who spent two years following Elon Musk for a new biography; Helen Lewis, staff writer, The Atlantic; Shona Ghosh, Deputy Executive Editor, Business Insider UKPresenter: Katie RazzallProducer: Simon Richardson