The Daleks are a race of genetically engineered mutants from the TV show Doctor Who.
The Dalek military is highly complex, involving a large number of ranks and positions, changing throughout time.
The Daleks were led by the Dalek Emperor. The next rank under him was originally the Black Dalek, but was later replaced with the position Supreme Dalek. Black Daleks were still the most common to take this position, however. The Dalek Time Controller was a Dalek brought from the future who was in charge of missions involving time travel.