Cyrronak

From Tardis Wiki, the free Doctor Who reference

Cyrronak was the home planet of the Cyrronak race, who were small purple humanoids. Their spacecraft were fueled by chemical engines that emitted a green, fog-like haze that made some races, like humans, fall asleep. Although technologically advanced, their smaller spacecraft were not built to withstand direct attack from primitive weapons. These smaller space pods usually carried one crew member and one advanced service robot capable of independent action. (COMIC: Highway Robbery)