The Galyari are a sapient spacefaring species which have colonized numerous planets in the past. The name "Galyar" has been applied to numerous of these worlds, so their actual home planet cannot be pinpointed. One of such planets was the homeworld of the sapient Kooskaru species, which the Galyari sought to exterminate, considering them as pests. This was prevented by the Doctor in his sixth incarnation, as he managed to banish the Galyari from that world. As a result, the Doctor (a.k.a. "the Sandman" to them) became known as a legendary evil figure dreaded by the Galyari race.