Kroton ( Throwback : The Soul of a Cyberman ) Kroton was a Cyberman who uncharacteristically retained his emotional capacity . He discovered this on the planet Mondaran , where he turned against his superiors and saved a group of resistance fighters , " sacrificing " himself in the process by launching the spaceship stolen by them into space while his batteries died . After being re - activated by a group of Humans , Kroton spent many years travelling alone ; saving planets , and helping those he came across . Occasionally he would have brief flashes of memories of a lost life come into his mind , which were real enough to reach his mind but not concrete enough to reveal to him more than brief pockets of his past . After helping the Eighth Doctor and Izzy on the Qutrusian Cargo Freighter X - 703 , Kroton was taken on - board the TARDIS , where he travelled with the pair for a time . After a battle with and Sato Katsura , Kroton regained his memories from his life as a human and became the new centre of the Omniversal Spectrum . Biography . Human . Little was known about Kroton ' s original life . He had a family and a wife named Shallia , who was also his childhood friend . At some point , he was taken from them by the Cybermen and converted . He himself forgot all of his past , including his real name , and only knew life as a Cyberman . ( COMIC : " Unnatural Born Killers " , " The Glorious Dead " ) Early life as a Cyberman . On Telos , Kroton became a Junior Cyber - Leader , and was sent to assist in the management of the occupied planet Mondaran . While leaving the planet , he wondered if he would ever see its sky again , a thought which his associate Liron found to be against what his programming should allow . On Mondaran , Kroton helped in the investigation of the resistance forces . He helped capture the elderly Willoway , and told the Cybermen under his orders not to kill Marilka , who was attempting to stop them from taking Willoway away . The resistance fighters would later find this puzzling , as Cybermen usually killed at the first sign of hostility . Kroton was horrified to learn that Willoway had chosen death over the act of giving information to the Cybermen . He could not understand how Willoway would choose to protect something other than his own life , which he had been thought humans were very precious of . Kroton attempted to contact members of the resistance movement to question them on this , but they reacted hostilely to his arrival . Despite this , he kept calm and continued to inform them that he just wanted to talk to them until they fled . When a group of Cybermen arrived to look into the disturbances of the evening , Kroton turned them away , telling them to rejoin their troop . Kroton met with the traitor Zarach , a humanoid who sold secrets of the resistance to the Cybermen in exchange for his life . He questioned why Zarach would betray his own kind , to which Zarach explained that he was like the Cybermen — emotionless . The information from Zarach was used to arrest the leader of the resistance , Pendar . Kroton went to speak with Pendar , and chose to save him from the prison and take him away from Mondaran City , where he let Pendar go . Kroton then began to sulk quietly , not sure what he had done or why . Pendar briefly considered killing Kroton with a large boulder , but found that he could not , as it would make him no better than the Cybermen . Reunited with Marilka , the three began discussing the events , where Pendar realised that Kroton had retained some of his human emotions . Kroton was highly doubtful of his place in the universe - - if were to return to his life as a Cyberman , he would be deactivated , but as a Cyberman he would not be trusted by any species but his own . Penar disagreed , saying that once the resistance had won against the oppressive Cybermen , that Kroton would have a place among his people . The three decided to steal a shuttle as it was an unexpected tactic . They were attacked by Cybermen on the base they chose but were able to get to a small ship . The ship they used to escape was low on fuel , meaning that the three had to stop off in the centre of the wilderness . Kroton ' s battery packs were running low , and knowing that he had no way to recharge them and that the shuttle would only key the other Cybermen into his friends ' position , he chose to use the remaining fuel to shoot out of the planet ' s atmosphere , saving Marilka and Pendar but leaving him lifeless , floating in space for years . ( COMIC : " " ) Wandering . A cruise spaceship , the " Flying Dutchman II " , which was stuck in a lateral stasis field , found Kroton ' s ship and the human passengers reactivated him . He helped remove the ship from the stasis loop , but discovered it had been trapped for six hundred and twenty - eight years . The mortal passengers all rapidly aged and died , leaving Kroton alone again , with only the ship ' s robot pilot for company . ( COMIC : " Ship of Fools " ) Kroton possibly explored the planet Paradise . ( COMIC : " Star Tigers " ) Kroton continued to travel through space . Along his journeys , he helped a group of Technosmiths on Baroq VII . They thanked him by making some " special adaptions " to his armour — which allowed Kroton to withstand blaster fire from various guns . ( COMIC : " The Company of Thieves " ) Kroton prevented an act of genocide by the Sontaran s . ( COMIC : " Unnatural Born Killers " ) A companion of the Eighth Doctor . Kroton encountered the Eighth Doctor and his companion Izzy on the Qutrusian Cargo Freighter X - 703 . After assisting them , he joined them in the TARDIS . ( COMIC : " The Company of Thieves " ) Kroton left the Doctor after a battle with during the Master ' s pursuit to become the centre of the omniversal spectrum . He reached Pandarost , the planet where the Master had prepared his trap for the Doctor and Izzy . Both were caught in the Church of the Glorious Dead ' s assault and barely survived , living a hard existence for nearly a month , fending off attacks by cultists and their monstrous Ash Wraith forms . Kroton finally did battle with Sato Katsura , lasting against him much longer than any other foe due to his enhanced physiology . Sato was sent reeling from the fight when Izzy forced upon him a mnemonic crystal and fed him back all the pain she had suffered at the hands of the Church . She gave the same crystal to Kroton , who used it , though he had rejected it before . It awoke memories from before his Cyber - conversion . He remembered all the happiness and sorrow he had ever felt as a human being . He accepted them and chose joy over misery . He was chosen as the new centre of the Omniversal Spectrum , banishing the Master and restoring the history he had warped , granting Sato his ultimate wish for honourable death as he left for the heavens . ( COMIC : " The Glorious Dead " ) Other References . Iris Wildthyme once claimed that Kroton was a friend of hers . ( PROSE : " The Scarlet Empress " ) Personality . Early on in his life he showed a child - like innocence to everything around him . He was often bothered and horrified by death or tragedy that surrounded him . ( COMIC : " " , " Ship of Fools " ) In his later life , however , he grew more cocky and confident . Kroton appreciated beauty . Upon leaving Telos for his mission on Mondaran , he considered out loud if he would ever see the skies of his home planet again . ( COMIC : " " ) These qualities made the Doctor realise Kroton was no ordinary Cyberman . He also withstood the impression of the interior of the TARDIS ; when the Doctor asked him if it struck him as " illogical " , Kroton happily cast away the word , stating , " To hell with logic ! " . ( COMIC : " The Company of Thieves " ) He had a balanced sense of right and wrong , becoming utterly infuriated at the possibility of a Sontaran plan for genocide of innocent natives and the Church of the Glorious Dead ' s atrocities against the alien ambassadors on the planet Paradost . ( COMIC : " Unnatural Born Killers " , " The Glorious Dead " ) Abilities . Due to helping out a group of Technosmiths on Baroq VII during his journeys , they thanked him by making some " special adaptions " to his armour — which allowed Kroton to withstand blaster fire from various guns , including Sontaran lasers , as well as withstanding a powerful electric charge after the Eighth Doctor mistook him for a normal Cyberman and shoved a high - voltage cable into his chest unit — which merely disabled him temporarily . He even stated to the Doctor when revealing the adjustments that " when half the galaxy keeps trying to shoot you on sight , you learn how to protect yourself ! " ( COMIC : " Unnatural Born Killers " , " The Company of Thieves " ) He had a metal staff that he could use during combat as well as magnetise it to his back . Kroton was seen using it to great effect during his battle with the Sontarans and the Space Pirates before finally using it during his battle with Sato . ( COMIC : " Unnatural Born Killers " , " The Company of Thieves " , " The Glorious Dead " )