As the Doctor customary travels alone in “ Doctor Who” , The Doctor also travels with companion in either singular or Plural through his journeys to keep the Doctor humble and grounded, also as we’re left off to traveling after the episode of “Hell’s Bent” on where we see Clara- Jenna Coleman and Me-Maisie Williams left off into another Journey into another faulty type 40- the Diner in where he met maybe for a while of River Song -Alex Kingston before she’s sets out in the getting qualify as the Professor and then the library incident where she met her husband the tenth Doctor-David Tennant ….
Introducing Bill, played by Pearl Mackie, her character seems to be In between late teens to into her twenties with an intriguing sense of street wit, and fashion sense from Nylon, also she’s asking alot questions of whom, what are they being chased by as the Doctor explains in the running, always constant running in the corridors away from the Daleks in which is a classic introduction like in the classic Who of traveling to Skaro , as they run needing to go back to 2017 to something in saving time where it will be aired also we get to know her more as her surname isn’t explained…. ?