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 adventures with, the Doctor. A companion is generally the series' co-lead character alongside the Doctor for the duration of their tenure, and in most Doctor Who stories acts as an...
.jpg/500px-1916-04-22,_La_Esfera,_Aquel_caballero_que_allÃ_ves,_Luis_de_Ocharan_(cropped).jpg)