Cybermen - Long before the advent of THE SIX MILLION DOLLAR MAN/ABC/1974-78 these metallic outer space menaces inhabited the continuing episodes of the British sci-fi series DOCTOR WHO/BBC/1963-89. Encased in a suit of silvery metal, the Cybermen from the planet Mondas had slowly become immortal by replacing their body parts with metal and plastic bionic units. Over the centuries, the Cybermen had become as cold and uncaring as the materials that surrounded their bodies, choosing to dominate and exploit the galaxies of the universe rather than peacefully coexist with them. Their protective metal shells had a self contained respiratory system allowing them to maneuver unhampered through the vastness of space. Cybermats, large metal robot  rats that shredded anything that got in their way assisted the Cyberman on their trek to conquest. Despite their formidable presence, the Cybermen could be incapacitated by sprinkling them with gold dust. Created by Gerry Davis and Kit Pedlar, the Cybermen premiered on a 1966 episode No. 29 "The Tenth Planet." See also  - ALIENS: "Dr. Who"