Alpha Dalek

Alpha Dalek was a designation used by high-ranking Dalek leaders. The Fifth Doctor commented that he'd never heard of the title. (PROSE: Resurrection of the Daleks)

History
Following the Dalek-Movellan War, in 4590, an Alpha Dalek was subordinate to the Supreme Dalek. (PROSE: Resurrection of the Daleks)

Another Alpha Dalek led the Renegade Dalek force on Necros to capture Davros. (PROSE: Revelation of the Daleks)