The documentary Dalekmania starts from the beginning, at least as far as the Dalek movies are concerned, and runs through their history, at the same time interviewing actors like Roberta Tovey, who played Dr. Who's granddaughter in the two films, and Jill Curzon, who played his niece in the second film.
In 1995 a documentary, Dalekmania, about the two Dalek films was released; it looks at the production of the film as well as its publicity.
More recently, Curzon was interviewed about her appearance as Louise in Daleks – Invasion Earth: 2150 A.D. in the documentary Dalekmania (1995).