The Cybermen in The Tenth Planet were from the planet Mondas – a hidden planet from our solar system, and a ‘twin planet’ to Earth before Mondas drifted away into deep space. Those living on the planet, now faced with increasingly harsh conditions on their planet, began to augment their bodies to survive, becoming Cybermen. However, because the conversion process was done in a gradual way with limited technology, the Mondasian Cybermen were not the sleek silver giants we’ve seen in recent years; rather, they were cloth-faced mummies, still with visible flesh and organic parts on show. In many respects, that’s part of why they’re so creepy – and why their memory has endured.
With the news today that the Mondasian Cybermen will be returning to Doctor Who, I wrote an article to explain what that actually means – after all, the Cybermen have a fairly complicated backstory!