Daleks are fictional extraterrestrial mutants from the British science fiction television series Doctor Who. Created by writer Terry Nation and first introduced in 1963, they are known for their iconic armored shells and distinctive robotic voices. Daleks are often depicted as ruthless conquerors, seeking to exterminate all beings they consider inferior. The design of a Dalek features a dome-shaped head with eyestalks, a plunger-like arm, and a gunstick. They are driven by a desire for supremacy and are often seen as one of the Doctor's most formidable adversaries. Their catchphrase, "Exterminate!" has become widely recognized in popular culture.