CyberKing A CyberKing was a Dreadnought - class ship whose pilot was integrated into it , making it the CyberKing . It was a huge bipedal robot operated by a living controller . These ships were used to front a Cyberman invasion by crippling whole cities and upgrading their populations en masse . They were the largest , if not the most powerful , weapons utilised by the Cybermen in battle . History . Mickey Smith once speculated that a CyberKing could be inside the void ship . ( TV : " Army of Ghosts " ) One CyberKing was created by Cybus Cybermen in London in 1851 . The Tenth Doctor theorised that the end of the 2009 Dalek invasion of Earth collapsed the walls of the Void , allowing the Cybermen to escape and travel back in time using a stolen Dalek Dimension Vault . Using child labour to generate electricity and produce the ship underneath the River Thames , Mercy Hartigan was made into the CyberKing . She refused to be cyber - converted , and instead used her mental powers to command the entire Cyberman army . The ship rose out of the Thames , with Miss Hartigan and several Cybermen controlling the machine inside the part of the vehicle shaped as a Cyberman mouthpiece , and rampaged across London . Using Jackson Lake ' s " TARDIS " and an improvised device made from Cyber infostamps , the Doctor severed the link between Hartigan and the Cybermen . The Cybermen and Miss Hartigan were killed in the process , and the CyberKing was transported into the vortex . ( TV : " The Next Doctor " ) It was later revealed that this event was not remembered by the people that witnessed it due to the cracks in time , which had erased events such as this from history . ( TV : " Flesh and Stone " ) In an alternate timeline where the Cyberman invaded all of time and space , at least three CyberKings led a full - scale invasion of Sontar , their firepower overwhelming even the Sontaran s ' defences . The Tenth Doctor became integrated within a CyberKing in an attempt to repel the invasion , but this was thwarted by the Cybermen . ( COMIC : " Supremacy of the Cybermen " ) Appearance . The CyberKing control unit was converted using a headset that connected the victim ' s mind to the CyberKing , changing their speech patterns and their eye colour throughout the process . Once the conversion was complete the controlling unit could operate the CyberKing ' s movements and in the case of Miss Hartigan could even take command of the Cybermen themselves . The CyberKing ship was a massive Cyberman - shaped walker , using its two legs to stride through the battlefield . It had a weapon attached to each arm ; a laser blaster on its left arm , and a mortar launcher on its right arm . The head served as the command centre for the vehicle , while its body contained a large cyber - conversion unit , allowing it to transform organic life into new Cybermen . The Cyberking had some components similar to Victorian machinery , to the extent that it appeared to be powered by steam engine , with smokestacks protruding from the shoulders . This suggests that the CyberKing was repaired by the Cybermen after exiting the void using the technology of the time ( like the cybershades and the " engine " that started the CyberKing ) . If this is the case , it can not be determined how much of the CyberKing ' s features are shared with an original Dreadnought - class ship . ( TV : " The Next Doctor " )