1983: The 20th Anniversary

Another major milestone meant the return of a tradition—and this time, with even more Doctors. Well, exactly one more. “The Five Doctors” united current Doctor Peter Davison with Troughton, Pertwee, and Richard Hurndall replacing William Hartnell as the First Doctor, as they battled the Master on Gallifrey alongside a bevy of old companions. Tom Baker declined to return for the special, leading to the Fourth Doctor’s sole contribution being via unused footage from the scrapped story “Shada.”