Cyberman


 * This article is an overview of the concept of the Cyberman. You may be looking for more specific versions, including those from Mondas and those from Pete's World

Cybermen of Mondas
These Cybermen were originally a wholly organic species of Near-Humans who originated on Earth's former twin planet, Mondas. Mondas drifted into the outer solar system and to survive, the natives of that world adapted by turning themselves into cyborgs. (DW: The Tenth Planet) Eventually, all of the Mondasians underwent forced cyber-conversion. (BFA: Spare Parts). Many of them left Mondas and eventually developed into separate groups without connection with one another.

Nearly all were silver in colour, with the exception of a black variety (for stealth) surviving in the London sewers (DW: Attack of the Cybermen). They also exhibited exposed circuitry and tubing which may contain hydraulic fluids for motion, covering a rubber or mylar-like outer skin. The CyberMondasians which the Doctor met on Snowcap base in 1986 had undergone a less radical conversion and still retained biological hands; it is possible these Cybermen were prototypes. (DW: The Tenth Planet) All other Cybermen were entirely covered up in their metallic suits. (DW: The Moonbase onwards)

These Cybermen had a number of major weaknesses, of which the most notable was the element gold. Gold, having a non-corrosive nature, choked their respiratory systems. (DW: Revenge of the Cybermen). 20th century guns barely phased Cybermen, though explosives and bazooka shells were capable of taking them down. (DW: The Invasion, Silver Nemesis) UNIT would develop gold-tipped rounds for Cybermen. (DW: Battlefield) In later centuries, the Cybermen would take hits from laser guns and energy weapons: at close range, this could destroy them. (DW: Earthshock)

Cybermen designed by John Lumic
This type of Cyberman originated in another universe, where they were created by John Lumic, the owner of Cybus Industries. His Cybermen believed that all people must be "upgraded" to cyber-form so that information is never lost and that the humans' physical and emotional weaknesses are abolished.

Cyber-conversion usually involved painfully removing the brain of the subject and placing it within a suit of armour. Once complete, the newly developed Cyberman had a special implant placed within them, which prevented them from feeling their emotions. However, if the implants were disrupted, then the Cybermen entered into a traumatic state as they were overloaded by the pain of the conversion. This inevitably caused an agonising death from the overload of emotions. (DW: Rise of the Cybermen / The Age of Steel).

The cyber-suit was constructed from bulletproof steel. These exo-structures appeared thicker and heavier than that of the Cybermen of Mondas — though a comparison of the actual efficacy of the two body types was never performed. A chest plate with the Cybus Industries logo housed a "heart of steel", the function of which is unclear, and the emotional inhibitor chip. The brain was contained within the head. Artificially grown nervous tissue was threaded throughout the body so the Cyberman responded like a fully biological organism. (DW: The Age of Steel) Without a brain inserted, the cyber-suit was a robot. Even when disembodied, the various parts of the suit — arm, head and torso — had sufficient processing capacity to pursue and attack a human target. (DW: The Pandorica Opens)

These alternate Cybermen showed no vulnerability to gold.

Cybermen found in the Arctic
While no contact between the two major groups of Cybermen was known to have occurred, there existed some Cybermen that shared characteristics of both. While they greatly resembled the Cybus-made Cybermen, and were said to be brains in metal shells like the Cybus creations, they had certain characteristics common to the Cybermen of Mondas. For instance, they used Cybermats, they recognised the Doctor was a Time Lord, and they had advanced spacefaring capabilities.

This unnamed group of Cybermen was buried under the ice in the Arctic Circle and had been for tens of thousands of years after being hit by a temporal storm. An excavation began to awaken the army, commanded by a Cyber-Lord, releasing Cybermats which in turn created Cyberslaves. The Eleventh Doctor arrived on May 4th 2010 and stopped their awakening. He blew up their base and put them back into stasis. (VG: Blood of the Cybermen) The Doctor acquired a chest plate from one of these Cybermen and kept it in the TARDIS drawing room. (VG: TARDIS)

Cybermen of the Cyber Legions
By some point in the 52nd century, possibly the 51st century, these Cybermen, organized into Cyber Legions, were a major power in space, possessing at least twelve fleets. The Cybermen's Twelfth Cyber Legion was well-known to monitor everything within 20,000 light years of the Church's base of Demons Run. They resembled the Cybus-made Cybermen physically, but used technology more similar to that used by the Mondasian Cybermen.

The Eleventh Doctor and Rory Williams invaded the Legion and destroyed part of it in order to blackmail the Cybermen into giving them information on the whereabouts of Amy Pond - and as a message to the abductors. (DW: A Good Man Goes to War)