Cyber Controller

The Cyber-Controller was the ruler of the Cybermen and was one of the antagonists in the Doctor Who series. The Cyber-Controller was much like Davros was in the Dalek fleet, second only to the Supreme Dalek. In the Cyber-Controller's case, he was second only to the Cyber King.

The Cyber-Controller was different from other Cybermen, as their eyes would glow. The first known Cyber-Controller was John Lumic in the first days of the new Cybermen, and then he was killed by Tyler when he cut the ropes the Controller was climbing and the Cyber-Contoller fell to death. The second known Cyber-Controller was an average Cyberman during the Battle of Torchwood Tower when two Cybermen argued over who should be Cyber-Controller. The third Cyber-Controller was Miss Hartigan when she powered the giant Cyber King.

The Cyber-Controller gives orders and powers the Cybermen in battle and gives them motivation. One has to go through an "upgrading" to become the leader; like when the human John Lumic was upgraded, despite his weak protests, and then he emerged immensely strong as the Cyber-Controller.