This week, how rogue antibodies turned one woman's existence into a living nightmare of delusions, hallucinations and paranoia, we examine the evidence that ME - or chronic fatigue syndrome (CFS) - might be an autoimmune disease, and why the blues might be down to a hostile immune response. Plus, how tracking eye movements can be used to influence decisions, why remembering causes you to forget, a new 3d-printer inspired by Hollywood's Terminator, and the genetic map of the UK: apparently the Romans didn't fancy breeding with us very much...