Warning: Spoilers ahead for Doctor Who season 15, episode 3, "The Well."Doctor Who season 15's main companion enters the story as someone who seems like a regular member of the human race, but the first episode quickly gives her a fascinating character quirk that has also long applied to the show's main character. Of course, the connection between Varada Sethu's Belinda Chandra and Mundy Flynn is one of the most interesting facets of her introduction, but "The Well" highlights another element of Belinda's backstory that was set in motion at the end of Doctor Who season 15, episode 1, "The Robot Revolution."