Thals

The Thals are a humanoid race that originate from the planet known as Skaro. They were one of two dominant species known to exist on the planet; the other being the Kaleds. Thousands of years ago, the Thals waged a bitter war against the Kaleds. Nobody remembers what started the war, but they continued their vicious campaigns against their enemies, all the while, securing themselves inside of a protective dome that surrounded their city. The Thals had only rudimentary technology available to them and much of their weaponry was not disimilar to that found on Earth during the first World War.

Their deadliest foe was a mutated and disfigured Kaled named Davros. Davros was the leader of the Kaled scientific elite and many believe that he was even the guiding force of the war. When the Thals learned that Davros' was creating hideous monstrosities to combat the Thals, they began construction on a super missile, which they hoped would be powerful enough to pierce the Kaled bunker dome and destroy their city. They captured and enslaved mutated surface dwellers known as Mutos to mine for the elements required to build the missile.