Ten Galaxies

The Ten Galaxies were ten galaxies ruled by the Dominators and their 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)

It is unlikly that mutters sprial is one of the ten galaxies but it also seems unlikly that the Quark would try to invade Earth from another galaxy.