After The Doctor saves the Earth once more in the fifth episode, World War Three, this episode of Doctor Who Confidential looks at some of the history of the Doctor's special interest in our planet.

Behind the scenes of "Rise of the Cybermen (1)".

This episode examines the history of the dreaded Cybermen, with memorable clips from the original series, and looks at the design process that brought the new-look Cybermen to our screens in the episode Rise of the Cybermen.

Behind the scenes of "The Impossible Planet (1)".

The design team is responsible for the look of Doctor Who, building sets and redressing locations to create the different time periods and alien worlds to which the Doctor travels.