Frazer Hines
Hines' "Doctor Who" debut came in 1966, when he was cast to play the part of Jamie McCrimmon, the companion of the Second Doctor (played by Patrick Troughton). Originally intended as a one-off guest character, Jamie joined the regular cast and appeared in the series from 1966 to 1969. Hines reprised the role in a cameo in the 20th anniversary serial "The Five Doctors" (1983) and as a guest star in "The Two Doctors" (1985). Hines would appear in 117 episodes of "Doctor Who" in all—more than any other "companion" actor in the history of the series. The only actors appearing in more episodes are those who played the first four Doctors. Many of the episodes featuring Jamie no longer exist in the BBC's collection.
Doctor Who (film)
Among the actors who were invited to audition for the role of the Doctor but declined the opportunity were Christopher Eccleston and Peter Capaldi. Eccleston and Capaldi would go on to play the Ninth and Twelfth incarnations of the Doctor, respectively, in the revived series of "Doctor Who" which began in 2005. Eccleston turned down the offer to audition for the TV Movie because at the time he felt he was not yet an established enough actor and did not want to be associated with a "brand name" so early in his career. Capaldi declined because he felt it was unlikely that he would be given the part.