Andrew is a "fallen BBC journalist", filmmaker and multi-linguist. He's the host of the award-winning podcast Heretics and the author of a new book, The Psychology of Secrets: My Adventures with Murderers, Cults and Influencers. We discuss the role that secrets play in keeping people controlled, or conversely, how revealing them can be freeing. On the flipside, we ask the question, can a culture of "openness" be just as controlling?