Of course, the Daleks are a perennial threat to our dual-hearted hero, and are the only villain so far to have faced every version of the Doctor. Their iconic screeching voice and plunger of death weapons have stood the test of time and made them into one of the most iconic alien races in sci-fi.
First appearing in 1963, writer Terry Nation portrayed the Daleks as a Nazi-like threat: violent, pitiless, and utterly merciless. Classic Daleks have found themselves stumbling over a simple set of stairs, but now they can levitate, devastate, and exterminate!