Place of Origin:
The Metalkind were a race of boron-based lifeforms.
The Cun were pig-like humanoids. Some were found in the Yssgaroth’s universe. In league with the dog-like Galk in the mining of the hallucinogenic drug Dream B, they were cruel to their human slaves. The Seventh Doctor tried to get those slaves to rebel against the Cun. (The Pit)