Heresy is a comedy talk show on BBC Radio 4, created and originally hosted by David Baddiel, now hosted by Victoria Coren. In the show, the presenter and a panel of guests commit "heresy" by challenging people's most deeply received opinions on a subject, in front of a studio audience. For example, received wisdom is that New Labour is all about spin, so the panel will try to argue that New Labour is not all about spin, and the guests have to try to make the audience change their minds. The pilot and first series had four guests on each episode, but this has since been reduced to three.