The Cyber-Controller is a fictional character from the British science fiction television series Doctor Who. It is a cybernetic being that serves as a leader for the Cybermen, a race of cyborgs known for their cold logic and desire to convert humans into their kind. The Cyber-Controller is often depicted as a more advanced version of a Cyberman, possessing greater intelligence and control over its fellow Cybermen. In the series, the Cyber-Controller typically seeks to expand the Cybermen's influence and power, often clashing with the Doctor, the show's main protagonist. The character embodies themes of technology versus humanity, highlighting the dangers of losing one's individuality in the pursuit of perfection.