The Daleks are one of the most powerful races in the Doctor Who history. They are the Doctor's worst enemies. They cry "EX-TER-MIN-ATE!" when they are about to kill someone. They look like small tanks or very large pepper pots. They first appeared in the first season episode "The Daleks". A more recent episode was "" (2019). They are not robots, but horrible aliens kept in a metal casing. They were mutated from Kaleds by their creator Davros during a war on their planet, Skaro. They can not be easily hurt by guns because their casing reflects or destroys the bullets.