Prunesquallor said:Actually there was one story where the Doctor found himself in an alternate fascist England. From the Jon Pertwee era. He discovers alternate versions of the people he's been working with in Brigadier Lethbridge-Stewart's UNIT- and they're not nice. Looking up this up in Fulton's ENCYCLOPEDIA OF TV SCIENCE FICTION, it was called INFERNO and was seven episodes long, May/June 1970.