Often in the universe of Doctor Who, our best means for understanding the Doctor is through the lens of his companion. Almost always present, the role of the companion is a central narrative of the Doctor. Furthermore, a comprehension of the role of the companion is essential in an effort to understand the motivation and nature of the Doctor. In this paper I argue that the relationship between the Doctor and his companion corresponds to that of Christ and Christian, especially in regards to issues of faith and doubt. This is seen through the arc of character development of each companion, especially in his or her moments of confusion and frustration with the antics of the Doctor. We will also find some relief, if not resolution, through concepts of faith given by Tillich. Though the exploration of the Doctor as a Soteriological actor have been drawn, this article addresses the interplay of Doctor as Soter and that of a Companion who may vacillate between dedication and confusion. Such an exploration will give us unique tools for understanding both individual and collective relationships with the Doctor and insight into the often counterintuitive decision to embark on a mystifying journey.