With the help of opera singer Lucy O'Byrne, the doctors reveal the hidden muscle that makes you breathe. Then, Dr Xand heads to a DNA laboratory to solve a mystery. Show more
Discover 11,128,835 listings and 279,937 playable programmes from the BBC
With the help of opera singer Lucy O'Byrne, the doctors reveal the hidden muscle that makes you breathe. Then, Dr Xand heads to a DNA laboratory to solve a mystery. Show more