In "The Evil of the Daleks" (1967) two more elements of the Dalek hierarchy are also introduced; the Dalek Emperor and Daleks with black domes which appear to act as the Emperor's personal guard.
In "The Evil of the Daleks" (1967) a Black Dalek is seen again, this time with grey shoulders. Two more elements of the Dalek hierarchy are also introduced; the Dalek Emperor and Daleks with black domes which appear to act as the Emperor's personal guard.