Liver disease is in danger of becoming a ticking time bomb in the UK - with one in ten of us likely to experience a problem with our liver at some point in our lives. Dr Alice Roberts explains what the liver does and why its ability to suffer in silence until it is too late is both its strength and its biggest weakness. She offers advice on how best to monitor your alcohol consumption, information about other ways you can damage your liver, and a chance to see both a liver transplant taking place and stem cell research aimed at making replacement livers in the future.