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.
Eighth Doctor
The Eighth Doctor made his first television appearance in the 1996 "Doctor Who" television film, the first time the Doctor had returned to television screens since the end of the original series in 1989. Intended as a backdoor pilot for a new television series on the Fox Network, the film drew 5.5% of the US audience, according to Nielsen Ratings. In the United Kingdom, it was received well, attracting over 9 million viewers and generally positive reviews. It was also generally well received in Australia.