John Lumic
This is the age of steel and I am its creator.
John Lumic was a business tycoon and owner of Cybus Industries and the creator of Cybus Cybermen. Born in Great Britain (he called it "the homeland"), he advanced the entire planet through such inventions as the EarPod.
Biography
I will bring peace to the world. Everlasting peace. And unity. And uniformity.
Though he publicly denied rumors of ill health, Lumic suffered from a terminal illness and used a motorized wheelchair as transport. He devoted all of his resources to discovering a way to extend his own lifespan. To this end, he used Cybus Industries' front organisation, International Electromatics, to abduct homeless people as a test subjects. These captives were transported to Lumic's factory in London, Battersea Power Station, where they were upgraded into Cybermen. Lumic took strict measures to keep the project secret, even killing a member of his staff who threatened to blow the whistle.
Hoping to gain government approval for his work, Lumic unveiled the Cyberman model to the President of Great Britain. To Lumic's dismay, the President denied his plea and rejected the project. Viewing the President's decision as a death sentence, Lumic set in motion a plan to overthrow the government. He mailed a pair of EarPods to the wife of one of his employees, Pete Tyler, ostensibly as a birthday present. In reality, the EarPods where meant to scan Jackie Tyler's brain so Lumic could override the security arrangements for that night. Knowing the President would be among those in attendance at Jackie's party, Lumic dispatched a horde of Cybus Cybermen to kill him (along with any other potential dissidents).
Once his breathing apparatus was damaged by Mr. Crane, Lumic realized that he would soon die and pleaded with his Cybermen to help him. The Cybermen reasoned that keeping the old man alive would be redundant, and against Lumic's protests, forcibly upgraded him into their new master, the Cyber-Controller.
He remained seated in a chair, connected to it by tubing, though he did have full mobility as long as he disconnected the tubing. This Cyber-Controller was similar to his subordinate Cybermen, except his brain was visible and his eyes glowed with blue light, suggesting more advanced vision circuits. It is also interesting to note that part of Lumic's human consciousness remained intact, to the point that it can be argued that there was even some emotion - anger - in his voice when speaking to the Doctor.
His brain housed in a metallic body, Lumic announced that his Cybermen would take control of London before overthrowing the world. Soon afterward, the Battersea factory was destroyed, temporarily delaying the Cyberman invasion. The upgraded Lumic angrily tried to stop the Doctor and his friend's from escaping in a zepplin. Before Lumic could reach them, however, Pete Tyler used the Sonic Screwdriver to cut the rope ladder which was suspending Lumic above his factory, causing him to fall into the burning wreckage, apparently killing him. (DW: The Age of Steel)
Personality
I can set you free. Would you not want that? A life without pain?
John Lumic shares some character traits with Davros, the creator of the Daleks. Both are considered to be mad scientists, are wheelchair bound, are kept alive by life support systems installed in their wheelchairs, their creations are the Doctor's greatest enemies, and eventually partly become like their creations, such as Davros mutating into nothing but a head in a special Dalek casing, and Lumic upgrading to be a Cyberman though still possessing part of his original mind and consciousness.
