David Gooderson, who plays Davros, was also uncredited as some Dalek voices. This continued a trend of the actor playing the creator of the Daleks also doing voices of the creation. Michael Wisher originated the role of Davros previously in Genesis Of The Daleks, in which he also provided some Dalek voices. Wisher had provided Dalek voices in the previous Dalek story, Death To The Daleks.
This episode was watched by 12.7 million viewers on its original transmission.