This short lived generation saw its origins not with the Kaleds, but with another Skarosian culture – the Dals. Thought to be extinct by the time of the Neutronic War, the Dal population had been devastated in a war with the Thals. Some Dals survived the apparent extinction and went into hiding from the other civilizations on Skaro, where they remained until after the Thal-Kaled war which corrupted the planet's atmosphere and landscape. Exposure to the pollution and radioactivity that was a result of this war caused the surviving Dals to begin a mutation process very similar to that which Davros saw as being the future of the Kaleds. These survivors happened upon an old testing ground for the Mark Two Travel Machines. There, they built the foundations of a city which would support their life within the casings – which were reliant on Static Electricity to function. These Dal Daleks survived in their metal city, unaware of their Kaled cousins buried in their tomb.
For five-hundred years they developed in their city. At the end of this time, the Dals became aware that the Thals also survived on the planet's surface and laid plans to exterminate their ancient foes. After a final confrontation with the Thals, which resulted in the deactivation of the city&#apos;s power supply, the Dal Daleks were powered-down, only minimal life support functions could be maintained by the casings' limited internal power source.
A number of years later, they were located by the Daleks of the First Generation and re-activated. Seen as inferior, they were used as pioneers and fitted with external power-collection discs to enable movement away from their city. The Dal Daleks were then used as the spearhead of the Dalek fleet – once they had been conditioned to be loyal to the Dalek Prime. Some special explorer units were transferred into prototype Mark Three Travel Machines, which could store a limited amount of power before requiring recharging. One such patrol crashed on the planet Vulcan and was later discovered by a Human colony. Since their genotype was never replaced, the Dal Daleks were destroyed as their numbers slowly dwindled.