Ten Galaxies
From Tardis Wiki, the free Doctor Who reference
The Ten Galaxies were ten galaxies ruled by the Dominators and they Quark servents. (DW: The Dominators)
Since they are not individually named and are possibly only designated by number, the Ten Galaxies may also include Galaxy 4. (DW: Galaxy 4)
Seven of the Ten Galaxies may also have been the seven galaxies that pledged their allegiance to the Daleks. (DW: The Daleks' Master Plan)