 Davies , prosthetics designer Neill Gorton , costume designer Louise Page , and concept artist Peter McKinstry then met to discuss the design of Davros for the episode . They agreed to keep the visual design of Davros faithful to that shown in his debut Genesis of the Daleks ; The only major change was to replace the hand destroyed in Revelation of the Daleks with a <unk> robotic version . McKinstry aimed to make Davros " bigger and scarier " by updating the " flimsy " design of the classic series : 
