^The Greatest Enemy, the Doctor ever faced.
But DW unlike ST is a show about one character the Doctor, sure the face might change and the personality to some degree but at the end of the day it's still the same core show
Mad Man with a blue box travels through time and space with companions fighting evil/injustice.
You also have to bear in mind that in the UK, DW is a mainstream show. Besides the 2005- era has looked back to previous Doctors there is no reason to thing we won't get more referrenes to the 1963-1989 era.