Would you like to upgrade your brain? Who wouldn’t? Ruby Wax, Matt Haig and Lucy Porter join presenter Viv Groskop to explore how to literally change your mind and be happier, healthier and less stressed. In a very special edition recorded at the Edinburgh Festival Fringe, we hear insights from the world of comedy, style tips from the team at the largest Mint Velvet store in the UK - oh, and an exclusive revelation of what Matt Haig wears in bed.