Donna Noble travels with the Tenth Doctor.
In the long-running BBC television science fiction programme Doctor Who and related works , the term `` companion '' refers to a character who travels with , or shares the adventures of the Doctor .. BBC. BBC. television science fiction. science fiction on television. Doctor Who. Doctor Who. Doctor. Doctor ( Doctor Who ). In most Doctor Who stories , the primary companion acts as an audience surrogate .. Doctor Who. Doctor Who. Doctor. Doctor ( Doctor Who ). audience surrogate. audience surrogate. They provide the lens through which the viewer is introduced to the series .. The companion character often furthers the story by asking questions and getting into trouble , or by helping , rescuing , or challenging the Doctor .. Doctor. Doctor ( Doctor Who ). This designation is applied to a character by the show 's producers and appears in the BBC 's promotional material and off-screen fictional terminology .. BBC. BBC. Until the modern revival of the series in 2005 , the term was rarely used on-screen .. modern revival of the series in 2005. Doctor Who ( series 1 ). The Doctor also refers to the show 's other leads as his `` friends '' or `` assistants '' ; the British press have also used the latter term .. Doctor. Doctor ( Doctor Who )