To mark 150 years since the first apparent sightings of St Bernadette at Lourdes, Matthew Sweet is joined by theologian Martin Palmer and Catholic writer Cristina Odone to discuss the enduring power of miracles in the 21st century. Award-winning architect Edward Cullinan discusses the challenges facing architecture in the face of climate change, Harvard literary critic James Wood unpicks how novels are written, from the prose of John Updike to characterisation in James Joyce, plus highlights from this year's Berlin Film Festival.