Ruby Wax is a comedian, writer, performer and mental health campaigner. She has suffered bouts of depression throughout her life and completed her Masters in Mindfulness-based Cognitive therapy at Oxford in 2012.
Andrew Williams worked as a senior producer for the BBC's flagship Panorama and Newsnight programmes, and as a writer and director of history documentaries. He is the author of two bestselling non-fiction books, The Battle of the Atlantic and D-day to Berlin, and four acclaimed novels, The Interrogator, (shortlisted for the Ian Fleming Silver Dagger Award and the Ellis Peters Award), To Kill a Tsar, (shortlisted for the Ellis Peters Award and the Walter Scott Prize), The Poison Tide and The Suicide Club. You can find out more about Andrew Williams and his writing at www.andrewwilliams.tv, and you can follow him on twitter at @AWilliamswriter or on Facebook.