Monster Files: Cybermen

The Cybermen are a fictional race of cyborgs who are amongst the most persistent enemies of the Doctor in the British science fiction television series, Doctor Who. Cybermen were originally a wholly organic species of humanoids originating on Earth's twin planet Mondas that began to implant more and more artificial parts into their bodies as a means of self-preservation. This led to the race becoming coldly logical and calculating, with emotions usually only shown when naked aggression was called for.
They were created by Dr. Kit Pedler (the unofficial scientific advisor to the programme) and Gerry Davis in 1966, first appearing in the serial, The Tenth Planet, the last to feature William Hartnell as the First Doctor. They have since been featured numerous times in their extreme attempts to survive through conquest.