Thal The Thals were one of the humanoid races which originally inhabited the planet Skaro . Biology . Thals looked much like Kaleds and humans , though they could be distinguished from Kaleds by their blond hair and light eyes . ( TV : " The Daleks " , " Planet of the Daleks " , " Genesis of the Daleks " ) Internally , Thals could also be distinguished from humans and Kaleds . They had thinner and longer lungs than the Kaleds ( AUDIO : " Corruption " ) and greater resistance to radiation . ( TV : " The Daleks " ) The name of the Thal state was the Thal Republic . ( AUDIO : " Corruption " ) Culture . During the Thousand Year War , Thals were just as brutal as their Kaled enemies . They had no qualms about using the slave labour of Kaled prisoners and Muto s to build the neutronic missile , even when they knew the radiation from the missile would kill the slaves . ( TV : " Genesis of the Daleks " ) There were seven males for every female . ( AUDIO : " Corruption " ) After the war , the Thals committed themselves to pacifism . ( TV : " The Daleks " ) Centuries later , they revered the Doctor and his companions as heroes and referred to the prior event as the First Dalek War . Turning full circle , they again adopted a militaristic way of life , though only , it seems , against the Daleks . ( TV : " Planet of the Daleks " ) " Sweet life " was a Thal oath . ( PROSE : " The Dalek Factor " ) Technology . Thal technology advanced in parallel to that of the Kaleds for some time . The Kaled began researching means of survival while the Thals concentrated on ways to destroy their enemies . They developed the neutronic missile but lacked the power to break down the Kaled defences with it . ( TV : " Genesis of the Daleks " ) After the Thal - Dalek War , it was many generations until they developed interplanetary flight . Their ongoing conflict with the Daleks forced them to develop weaponry . They used compact firearm s that were attached to their holsters by a cord . However , these weapons seemed to have no effect upon Daleks . To combat Daleks , the Thals developed powerful explosives . These explosives could easily kill Daleks , blowing them wide open . ( TV : " Planet of the Daleks " ) History . Early history . 100 million years before the Thousand Year War , the Thals ' evolution diverged from that of the Kaleds . ( AUDIO : " Corruption " ) One account stated the Thals and Dal s were descended from humans transplanted from Earth to Skaro as an experiment by the Halldon s . ( PROSE : " We are the Daleks ! " ) The Thals had written records going back nearly half a million years . Records would describe the Thals as originally a warrior people , while the Dals were more orientated towards philosophy and science . ( TV : " The Daleks " ) Thousand Year War . Originally , the Thals and Kaleds lived together in peace . ( AUDIO : " Purity " ) Due to unknown circumstances , the Kaleds and Thals engaged in the Thousand Year War . Though they originally used advanced technology , towards the end of the war they became more primitive . By the end of the conflict , both Thals and Kaleds sheltered in domed cities overlooking a wasteland . The war concluded when Davros , a Kaled leader , gave the means to destroy the Kaled Dome to the Thals . They used this compound in the missile they sent to the Kaled city and destroyed it . In " retaliation " for the destruction of the dome , Davros ordered the Daleks to destroy the Thals . Led by a Thal , Bettan , Thals and Mutos joined together to fight the Daleks , who were trapped in the Kaled bunker after an explosion , defeated but still alive . ( TV : " Genesis of the Daleks " ) Aftermath . The Thals renounced violence and became pacifist farmers living in small bands on a less radiated plateau . They would not even engage in violence for self - preservation and showed no curiosity about the Dalek City or its inhabitants . The Thals believed that , following the war , radiation had mutated them into perfect beings , though after a stage of advanced mutations . After a particularly bad year for crops , the Thals were forced to move to the petrified jungle near the Dalek City , over five hundred years after the war passed , to look for food . Ian Chesterton , a companion of the First Doctor , used moral blackmail to force the Thals , Alydon in particular , into putting together an expedition into the Dalek City to fight against the Daleks who intended genocide against the Thals . The Thals invaded the Dalek City , cut off the power and so deprived the Daleks of the static electricity they needed to live . ( TV : " The Daleks " ) Spaceflight era . By the 26th century , the Doctor ' s visit was considered a legend . In 2540 , the Third Doctor and Jo Grant met a taskforce of Thals on Spiridon where a small group , led by Taron , had landed to destroy a Dalek army massed on that planet . The Thals had , by then , reclaimed Skaro . They had only recently developed spaceflight . The mission to Spiridon was the furthest they had ever gone . Earth was unknown to them , believed to be simply part of the Doctor legend . ( TV : " Planet of the Daleks " ) The Thals were said to have relocated to another homeworld New Davius ( AUDIO : " Brotherhood of the Daleks " ) some time before the Imperial - Renegade Dalek Civil War . ( COMIC : " Emperor of the Daleks ! " ) In their absence , Skaro was believed to have been destroyed . ( TV : " Remembrance of the Daleks " ) In reality , a decoy world named Antalin had been destroyed . The Thals survived past Antalin ' s destruction and fought the Daleks on Terakis and wiped out half of the Dalek Eighth Fleet . ( PROSE : " War of the Daleks " ) The Daleks mounted a " liquidation war " against the Thals which was called the Pa Jaski - Thal . The Special Weapons Dalek participated in this war . ( PROSE : " Remembrance of the Daleks " ) Eight centuries after the Daleks had been defeated , the Thals had made it their mission to hunt and destroy any remaining Daleks in the galaxy . A squad of Thals travelled to a planet in the Quadrille and discovered that the Doctor was unwittingly working for the Dalek Emperor . Whislt the Thals believed that the Doctor had helped them to escape , they had in fact been infested with the Dalek factor , which , after several generations , would turn the Thals into Daleks . ( PROSE : " The Dalek Factor " ) At some point , the Thals fought a series of wars with the Mechonoid s . ( AUDIO : " Brotherhood of the Daleks " )