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 (series 1)
David Tennant had been offered the role of the Doctor when he was watching a pre-transmission copy of "Casanova" with Davies and Gardner. Tennant initially believed the offer was a joke, but after he realised they were serious, he accepted the role and first appeared in the series finale "The Parting of the Ways". Tennant was announced as Eccleston's replacement on 16 April 2005. Other recurring characters for the series included Camille Coduri as Rose's mother Jackie Tyler, and Noel Clarke as Rose's boyfriend Mickey Smith. Other actors and television presenters who appeared in the series included Mark Benton, Zoë Wanamaker, Simon Callow, Eve Myles, Penelope Wilton, Annette Badland, Matt Baker, Andrew Marr, Corey Johnson, Simon Pegg, Anna Maxwell-Martin, Tamsin Greig, Shaun Dingwall, Florence Hoath, Richard Wilson, Jo Joyner, Davina McCall, Paterson Joseph, Anne Robinson, Trinny Woodall, and Susannah Constantine.