In the Unbound Universe, the Black Dalek was the leader of Davros' second batch of Daleks, though Davros noted that the Black Dalek was not meant to be a leader in the truest sense of the word, as the Daleks were designed to be equal to all of their kin, but a rather a central point for which the Daleks to base their psychology and society around. Before he abandoned Skaro, Davros often conversed with the first Black Dalek. By the time of the Quatch invasion of Skaro, the Fourteenth Black Dalek ruled the Dalek City. (AUDIO: Masters of War)
Tardis