Cryon

The Cryons were the original native inhabitants of the planet Telos, before being conquered and almost entirely wiped out by the Cybermen.

Biology
Cryons are an all-female species of psychrophilic humanoids which thrive in freezing conditions and can't survive in temperatures above zero. They have grey translucent skin, deep-sunken round eyes protected by transparent lenses, tall heads and long clawed fingers. They have no hair, but have icicle-like "mustaches" on their faces, contrasting with their otherwise feminine physiques and feminine voices.

Appearances

 * Doctor Who, season 22, Attack of the Cybermen (1985)