Cyber - Leader One This Cyber Leader , designated Cyber - Leader One , was the leader of the Cybermen of a parallel Earth following the destruction of the Cyber - Controller , their creator , John Lumic . It served as the initial leader of the army of five million Cybermen which had crossed from their parallel Earth to the Earth of the Doctor ' s universe , resulting in the Battle of Canary Wharf . Biography . After their defeat at the hands of the Preachers , resulting in them being sealed in their Cybus factories , ( GAME : " Cyber Assault " ) the Cybermen took advantage of the time they had as human ity debated what to do with them , infiltrating their universe ' s Torchwood Institute . They found a crack in the universe , caused by the passage of the Void Ship , and a combined force of five million Cybermen were able to travel from their dimension into the Doctor ' s . The Cyber - Leader led an advance guard of Cybermen , establishing a base in secret inside the Torchwood Tower at Canary Wharf , while the rest of their army infiltrated the planet in the guise of benign ghost s of deceased humans . After two months ( three years in parallel Earth time ) , the Cybermen upgrade d several Torchwood employees into drones in order to take control of Torchwood ' s ghost shift and finalise their invasion . It was at this time that the phenomenon was discovered by the Tenth Doctor , who came to Torchwood and , after deactivating the drones , traced the Cyberman signal and uncovered the advanced guard , who , under the command of the Cyber - Leader , proceeded to reveal themselves as they wrested control of the ghost shift from Torchwood . With the ghost shift increased to 100 % , all the ghosts suddenly appeared in their true Cyberman form , occupying every landmass on the planet with the intention of upgrading all of humankind . The Cyber - Leader confirmed to the Doctor that they did not create the Void Ship , being beyond their technology , having only followed in its wake . ( TV : " Army of Ghosts " ) Simultaneously , a quartet of Dalek s , the Cult of Skaro , had exited the Void Ship with the Genesis Ark . The Cyber - Leader , detecting the appearance of unknown technology sent Cyber Units Ten - Six - Five and Ten - Six - Six , leading to a confrontation with a single Dalek , who swiftly exterminated the two Cybermen after refusing a proposal of alliance . In response , the Cyber - Leader addressed the Cult of Skaro ' s leader , Dalek Sec , via a communications channel , warning that the Daleks had declared war , or as Sec retorted , " pest control " , against the Cybermen . Commencing immediate preparations for the battle against the Daleks , the Cyber - Leader ordered an immediate quarantine of the chamber holding the Void sphere as well as emergency upgrades of Torchwood personnel to bolster the Cybermen ' s numbers , with the Doctor being preserved due to the Cyber - Leader deducing that he held vital information on the Daleks in light of his increased adrenalin . Addressing the Doctor , the Cyber - Leader voiced its observation that he was proof that emotion s were an ultimately destructive flaw . The Doctor agreed , but retorted that he liked hope , calling it a good emotion as he indicated to the Cyber - Leader that it was coming . Indeed , as soon as the Doctor spoke , a force of Preachers led by Jake Simmonds immediately arrived from the parallel Earth , with the Cyber - Leader being too late to realise as the Preachers neutralised his Cyberman cohort . The Cyber - Leader itself sustained a direct hit from an energy blaster fired by Jake . Collapsing to the floor on its knees as its head exploded , the Cyber - Leader was terminated . The Cybermen elsewhere learned that the Cyber - Leader had been destroyed and proceeded to immediately install a new Cyber - Leader , with a volunteer being upgraded . ( TV : " Doomsday " ) Alternative timeline . During the war between the Cybermen and the Preachers in their own universe , the Cyber - Leader was selected by the Cybermen to lead them and replace the Cyber - Controller . The Cyber - Leader coordinated the Cyber battle plans and the Cybermen proceeded to clear all the Preacher bases from the planet . The Cybermen , victorious , viewed the Cyber - Leader as obsolete and deleted it . ( GAME : " Cyber Assault " )