The Doctors reveal how enzymes speed up chemical reactions inside your body with a huge foaming experiment. Dr Xand visits the BBC Philharmonic Orchestra and is treated to a special performance while finding out how your brain reacts to music, and there are three more incredible Ouch Award finalists to meet. Meanwhile, in the Emergency Department, Alfie has a sore hip and Taya has stepped on broken glass. And will you spot today’s British Sign language sign? It’s ‘jelly’! Show less