The Paris attacks and recent San Bernardino shooting have revived an ongoing conversation about Muslim women's safety. The hijab, or headscarf, is often at the centre of that discussion. Some community leaders have advised their sisters to forgo covering in order to protect themselves in public or to find other ways to cover without drawing attention. Others are promoting safety through self-defence tips and classes specifically for Muslim women. But there are a number of people who believe taking any of these routes is submitting to rising anti-Muslim sentiment. We'll speak to Muslim women about their recent experiences and the decisions they are making about expressing their faith. Join in with your questions and comments at 19:30 GMT.

Can science fiction spur social change? Sci-fi often evokes images of space travel and future technology, but fantasy worlds are also being used to examine attitudes towards sexism, racism, violence and other injustices. Through imagination and prose, sci-fi writers are challenging the status quo to create alternative realities. We'll speak to authors using the genre to critique our existing universe. Join us at 1930GMT.