2013 marks the 50th anniversary of Doctor Who, the longest running science fiction show in history. To celebrate, the BBC is releasing a curated selection of the best of each of this storied program's eleven Doctors. The initial release showcased Doctor Who's first four Doctors, including William Hartnell, Patrick Troughton, Jon Pertwee, and Tom Baker, spanning from 1963-1981, a period of almost twenty years. The years 1981-1996 saw four new actors portray the Doctor, Peter Davison (1981-83), Colin Baker (1984-86), Sylvester McCoy (1987-89) and Paul McGann (1996).