This introduces Jon Pertwee as the doctor and the Nestene Consciousness as the alien invaders. UNIT are called to investigate a mysterious stranger found outside a police box. Shot on outside locations due to a studio strike at the BBC it has a refreshing feel to it. It also introduces Liz Shaw as the Doctors assistant providing a intelligent educated woman rather than a pretty vacant who gets into trouble to create plot. It shows the Doctor recovering his memory and establishing his liking for vintage cars. It is an intelligent plot with action and danger. The Nestene and their creations the Autons show up again with the master in the “Terror of the Autons ”
