A documentary on BBC Radio 4 presented by writer and abolitionist Walidah Imarisha on the power – and the rich history – of speculative, visionary fiction by black authors in the UK, USA and Africa, and how activism is a creative act of bringing new realities into being. In conversation with multidisciplinary artists Moor Mother and Rasheedah Philips, Nigerian-American writer Nnedi Okorafor, and British feminist writer and researcher Lola Olufemi.