Doctor Fotheringown was a professor who had just invented time travel. He was an alternate version of the Doctor and from a different universe to the one which the Doctor called home. (NOTVALID: The Doctor's New Invention)
Behind the Scenes Edit
This Doctor, played by Clive Dunn, features in the sketch The Doctor's New Invention which appeared on It's a Square World, he wore William Hartnell's First Doctor outfit and was a parody of the latter.
He is the second ever actor to play the Doctor in any medium after William Hartnell respectively.