Overview: Dr Chris puts Dr Xand inside a giant water balloon to show how viruses attack our bodies, there’s a final instalment of Ouchology and Dr Chris discovers how the shape of your ears enables you to hear. There are more mind-boosting tips and we meet our final three Ouch Awards finalists who have shown great personal courage. Meanwhile, over in the Emergency Department Eva is having trouble with her eczema and Demi receives treatment for a burn.