A Dalek is a fictional extraterrestrial race from the British science fiction television series Doctor Who. Created by writer Terry Nation, Daleks are known for their robotic appearance, characterized by a dome-shaped head, eyestalk, and a shell covered in metallic bumps. They are often depicted as ruthless and aggressive, seeking to exterminate all beings they consider inferior. Daleks are controlled by a single, malevolent intelligence, often referred to as a "Dalek mutant." They are equipped with advanced technology, including a laser weapon and the ability to levitate. Their iconic catchphrase, "Exterminate!" reflects their primary goal of domination and destruction.