(A calendar on the wall shows December 1986.) Come in please. The Cybermen's hands are human.) They struggle to move in the blizzard.) You turn up out of nowhere, a routine space shot goes wrong, a new planet appears and you tell us you know all about it.
Plan: A: December 1986; Q: When did a new planet appear in the Solar System? A: Earth; Q: Mondas is the twin of what planet? A: the Cybermen; Q: What are the inhabitants of Mondas? Summary: In December 1986, a new planet appears in the Solar System which turns out to be a long-lost twin of Earth's named Mondas. Its inhabitants are the Cybermen.