Ethereal (The Cloud Exiles)

The Ethereals were a humanoid race native to an unnamed planet. Their capital city was Droog. The Ethereals built the Baggolts to serve them, but the Baggolts rebelled and turned their former masters into living clouds in a failed attempt to kill them via vaporisation. Five eketrons later, the First Doctor visited their world, where the Ethereals captured him and tried to turn him into a mould for new humanoid bodies, a process which would have killed him. Instead, the Doctor restored their original bodies, then helped their leader Mitzog put an end to the Baggolt rebellion. (PROSE: The Cloud Exiles)