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.
Frazer Hines
Up until 2007, Hines was the only surviving Second Doctor companion actor not to have acted in a Big Finish Productions "Doctor Who" audio play. (The others have played characters other than their television roles.) In November 2007, he starred as Jamie in "Helicon Prime", the second installment in Season 2 of Big Finish's Companion Chronicles. Since then he has appeared in many more Companion Chronicles, where his uncanny ability to mimic Patrick Troughton's Second Doctor has been welcomed by fans of the show. Hines has also recorded linking narration for many Second Doctor serials which no longer exist in video form; the soundtracks, along with Hines' narration, have been released on CD by BBC Audio. He also appeared in an audio trilogy with Colin Baker's Sixth Doctor as an older Jamie. In 2013, Hines portrayed both Jamie and the Second Doctor in the Big Finish audio play "The Light at the End", produced to celebrate the 50th anniversary of "Doctor Who".