Lish Toos Pilot Lish Toos was second - in - command aboard the sandminer " Storm Mine 4 " . She was caught up in a sequence of events instigated by Taren Capel , whom she helped the Fourth Doctor defeat . Biography . Toos worked aboard the control deck , with one of her roles being to identify rich veins of ore . After Chub was murder ed , Toos and the other crew members were gathered together by Commander Uvanov to discuss the situation . Toos was dissuaded by Dask from following Borg and Cass to actively search for the Fourth Doctor and Leela , who were suspected of the murder given that they were an unknown quantity . When they were captured , Toos agreed that the Doctor ' s claims that he was not responsible were plausible given that " as a lie [ it was ] pretty feeble " . Returning to work , Toos reported that they were nearly fifty percent under target to meet the quota of ore assigned to them . She suspected that without a rich vein they would return with the miner half empty . Toos was on the control deck when the motors were jammed . Chief Mover Poul contacted her for a report and asked her to told the vehicle steady , receiving a sarcastic remark in reply . The Doctor and Leela , having been freed from their bonds , went to the control deck and the Time Lord advised Toos to " cut the power " . The readings increased until they were 85 % above safety . The Doctor had Dask cut the zeta link s , saving the sandminer as the levels returned to safety . SV7 contacted Toos to confirm an order given to it by Poul - to restrain Commander Uvanov - and she corroborated it . Toos further requested the SV7 , who now addressed her as Commander , perform a full scale mine integrity survey . As she was visibly in pain , Leela pulled back Toos ' sleeve to reveal a wound on her wrist . She claimed she hadn ' t mentioned it as there was " too much to do " . Leela bound the wound for her , telling her the old Sevateem saying , " If you ' re bleeding , look for a man with scars " . Toos asked Poul to explain why Uvanov was under guard and he explained that he believed the former Commander to be the murderer , telling Toos a story about how he had left a man to die on a previous expedition . She was initially sceptical , given that an enquiry would have followed , but Poul explained that he had avoided it as he produced results being " the best pilot " the company had . Retiring to her cabin , Toos rested on her bed . She was woken when SV7 entered to report that Uvanov had escaped his guard by ordering it away . Toos asked why his voice had not been removed from the command program , to which it replied that no order in that kind had been given . She assented to SV7 ' s offer of a status report and it informed her that repairs were progressing but there had been localised failures in the power system resulting in " door and light malfunctions " . After SV7 left , the Doctor contacted Toos to warn her that the Sandminer robot s were responsible for the killings . She was reluctant to believe such as thing possible , but agreed to round up the others and bring them to the control deck . However , when she opened her cabin door , she found V6 on the other side . After it disregarded her order to return to its duties , she closed the door , trapping its hand . Toos struck its hand , which V6 de - attached from its arm . It gained access and , despite her pleas , began chocking her . She was saved when SV7 contacted V6 , ordering it to move to section J . As this was a priority call , it released Toos and left . D84 found her , and Leela came along shortly after , with the latter comforting Toos by holding her . Leela assisted Toos to walk towards the control deck . On the way , they hid inside a hopper . The acting Commander contacted SV7 , unaware of its conversion to Taren Capel ' s creed , and was asked to report her location . Leela convinced her to lie , and she told it she was in her cabin . Toos remarked that SV7 had failed to identify her voice , which was unusual given it was in the command program . Leela explained this as proof the Super - Voc had been tampered with . They arrived upon the control deck and Toos told the Doctor she accepted his claim of a " robot revolution " . Uvanov was also on deck , resuming his role as Commander and explaining to the group the circumstances of his supposed murder , as reported by Poul , where the victim had been a sufferer of robophobia who had run into trouble . The Doctor enquired if blasting powder was kept aboard the sandminer and Toos replied that " half a dozen z - 9 electron pack s " were available . The Time Lord explained that , by passing " a positive charge through the metal plate , you ' d be able to magnetise them and have anti - robot bomb s " . The Doctor and Leela left Toos and Uvanov on the deck to produce these weapons . When Dask , who was in fact Taren Capel , pleaded with them through the door to let him in , Uvanov moved to do so , put Toos blocked his way and persuaded him otherwise . They finished crafting the bombs and used one to destroy V5 . Toos and Uvanov left the deck and moved through the sandminer . They evaded SV7 by hiding behind an art piece but encountered it again after it had killed Capel , not recognising his commanding voice due to the presence of helium . Repeating the phrase " kill the humans " , SV7 turned on the newcomers , beating Uvanov to the ground . It began to choke Toos , but the Doctor thrust a laserson probe through its head , deactivating it and saving her . With a rescue ship on its way to collect Toos and Uvanov , the Doctor and Leela left . ( TV : " The Robots of Death " )