Everyone has companions theyd like to see return to Doctor Who but not all of these fondly remembered characters can or should return. Some companions are locked away behind an impenetrable wall of timey-wimey stuff that the Doctor will explain later, à la Amy and Rory. Other characters, meanwhile, have completed an emotional arc, the impact of which would only be lessened by an untimely reappearance, such as with Rose, Martha, Wilf, and River Song. Then there are other characters who cannot return because of the harm that would befall them, such as the much loved Donna, who would immediately die upon remembering the Doctor. There's even a small group of companions who cannot return because they died. This short roster includes Adric, Katarina, Sara Kingdom, and Astrid. Although resurrections are not unknown in Doctor Who (the Master, Davros, and now the Brigadier all returned from the grave), perhaps companions should be spared this melodramatic fate and rest in more dignified peace. No one wants to disinter Sara's remains. Before listing the prime contenders for entrance to this exclusive club, let's lay down some guidelines. Wonderful though certain characters are (Jenny clone-of-the-Doctor, Malcolm, Vastra, Jenny faux-Victorian-housemaid Flint, and Strax), this article is limited to considering only bona fide travelling companions or characters that, for the span of a story, occupied that role. With that said, here are 14 more that could feasibly return, if only for a single story, building up to one whose return would cause fans the most sheer, unbridled joy. For each of these characters, the story is far from done.