THE DEADLY SISTERS (vocals) Neither Fi Fi and Anni have ever spoken. On their fifth birthdays they spontaneously burst into song joining in with the theme tune to 'Wonder Woman ', much to the astonishment of their parents. As the subjects of scientific investigations and clinical trials they baffled the experts who pronounced the girls 'silent but deadly'. Unable to communicate except through singing and dancing they worked as musical delivery operatives for Interflora and then as trapeze artists for French expressionist circus troupe 'Les Poissons Magnifique' before being spotted by the Doctor. They now share duties on lead and backing vocals as well as the occasional mime and flower arrangement. CLOSE FOLDER