Doctor Who show, as the story begins anew with each companion and she undergoes more change than the Doctor. The primary companions of the Ninth and Tenth Doctors were Rose Tyler (Billie Piper), Martha Jones (Freema Agyeman), and Donna Noble (Catherine Tate) with Mickey Smith (Noel Clarke) and Jack Harkness (John Barrowman) recurring as secondary companion figures. The Eleventh Doctor became the first to travel with a married couple, Amy Pond (Karen Gillan) and Rory Williams (Arthur Darvill), whilst out-of-sync meetings with River Song (Alex Kingston) and Clara Oswald (Jenna Coleman) provided ongoing story arcs. The tenth series introduced Pearl Mackie as
Rose (Doctor Who episode) (Christopher Eccleston) plot to prevent an invasion of the Earth by the Nestene Consciousness (voice of Nicholas Briggs) and the Autons after the Doctor destroys Rose's workplace. The episode marked Eccleston's first appearance as the Doctor, succeeding several other actors who played the role, and Piper's debut as the Doctor's travelling companion Rose. Being the first episode of the revived series, several recurring characters were introduced: Camille Coduri as Jackie Tyler, and Noel Clarke as Mickey Smith. Viewers did not see the Doctor character regenerate from a previous incarnation, regeneration being a plot device in which the character of the