Drawing inspiration from the Nazis, Nation portrayed the Daleks as violent, merciless and pitiless cyborg aliens, who demand total conformity to their will and are bent on the conquest of the universe and the extermination of what they see as inferior races. Collectively they are the greatest enemies of "Doctor Who"s protagonist, the Time Lord known as "the Doctor." During the second year of the original "Doctor Who" programme (1963-1989), the Daleks developed their own form of time travel. In the beginning of the second "Doctor Who" TV series that debuted in 2005, it was established that the Daleks had engaged in a Time War against the Time-Lords that affected much of the universe and altered parts of history.