In this episode, we look at love - from the point of view of a mathematician trying to figure out their love life, a film-maker exploring the way the state exploits love, and an energy expert researching how family ties can influence climate change. Martin Zaltz Austwick hosts and chats to mathematician Hannah Fry (who talks more about her new book on the Mathematics of Love here http://www.theguardian.com/science/2015/feb/01/looking-love-wrong-equations-mathematics-sexual-partners), Charlotte Johnson speaks to director Lizzie Gillett (director of http://spannerfilms.net/undercovers) and Mike Fell interviews Jenny Love (http://www.element-energy.co.uk/2014/04/two-new-recruits-join-element-energys-cambridge-office/).