User:SOTO/Forum Archive/The Reference Desk/@comment-95.172.232.188-20140404191002/@comment-430325-20140506214425

There must be several dozen of them, of which a few dozen would have acted with more than three. The obvious example is John Scott Martin, the only person to have acted with all seven old series Doctors on television. Anthony Ainley acted with all of them bar William Hartnell, counting his appearance with Troughton and Pertwee in The Five Doctors. Roy Skelton acted with all of them bar one of the 80s Doctors, Peter Davison I think. Michael Sheard acted with five Doctors on screen and at least one in the audio plays. John Bailey I randomly recall acting with three Doctors. Bernard Kay acted with three on screen and at least one more for Big Finish. There's probably loads more if I could sit down and think about it.