Big Bad Wolf Bedtime Story

An academic who created an app which harvested data from 50 million users says he has been made "a scapegoat" for Facebook and Cambridge Analytica. Also in the programme: People in the north-eastern Nigerian town of Dapchi are celebrating the return of most of the school girls kidnapped by Boko Haram militants last month; and we hear from a Palestinian doctor who saw three of his daughters killed when an Israeli tank attacked his home in Gaza - but who refuses to hate in their name. Picture: Logos of US online social media and social networking service Facebook. Credit: Getty Images/AFP.