Fumifugium

The Fumifugium were a species that lived and thrived in smoke. They worsened the Great Smog of London but were defeated by the Tenth Doctor, Donna Noble, Ivy Clark, Terry Hopkins and Richard Cooper. (AUDIO: The Creeping Death)

Behind the scenes

 * The name of the species is taken from the book Fumifugium, which studied the effect of air pollution and smog on civilisation, published in London 1661.