1: The Invisible Enemy by MARTIN WORTH In the 1840s the Vienna General Hospital was one of the great centres of European medicine, yet many mothers died of ' childbed fever.' Ignaz Semmelweis set out to find the cause of this disease. Music composed by DUDLEY SIMPSON Designer DEREK DODD Cameraman NAT CROSBY Film editor DAN RAE Producer PETER GOODCHILD Director JOHN GLENISTER