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.
Noel Clarke
He has had recurring television roles as Wyman Norris in the revived series of "Auf Wiedersehen, Pet" (2002–2004) and as Mickey Smith in the first two series of the revival of the BBC science-fiction series "Doctor Who" (2005–2006). He became the series' first black companion in the episode "School Reunion", and reprised his role as Mickey in the episode "Journey's End" in 2008 and in 2010 in "The End of Time" Part 2, and also starred in the "Doctor Who" audio series "", which was released from September to December 2007. His other television work includes appearances in "Casualty" and "Metrosexuality". He has also acted on the stage, and won the Laurence Olivier Award for "Most Promising Newcomer" in 2003 for his performance in the play "Where Do We Live" at the Royal Court Theatre. Clarke starred in the film "Doghouse", directed by Jake West and produced by Carnaby Films International. The film was shot primarily in Midhurst, a small town in West Sussex, on the grounds of the old King Edward VII Hospital. He also participated in Neil Marshall's film "Centurion", about which Clarke said, "it's about the Roman Legion and I'm one of the soldiers".