Science talk : Movie releases of a chemical kind, exercise and coffee

Dr Alice is back in the house for science chat and she's got popcorn for Dr Karl! But wait, why? They are talking movies and the science behind knowing what's going on in a film by measuring the chemicals released by the audience. Who knew there could be a link between 'The Hunger Games', the Amazon rainforest and being able to diagnose medical conditions? Find out what happened in the case of the 'poisoned pants' and what's the best time to exercise to lose weight? They ask the big questions about coffee – good or bad – and, should you really have a hot cup of tea to cool you down?