Mondas

Mondas is a fictional planet featured in the British science fiction television series Doctor Who. It first appeared in the four-part "The Tenth Planet" storyline from 1966, which featured the final adventure of the First Doctor, and the introduction of the Second Doctor. It is also notable for being the base of operations of the Cybermen. The particular breed (or model) of Cybermen from this world are often referred to as Mondasian Cybermen.