Obviously, the new doctor is one of the main characters. There might also be patients who are central to the story, as their cases could be what drives the new doctor's actions and the overall plot. And perhaps there are some colleagues or superiors who interact with the new doctor, either supporting or opposing them.
Both 'dr' and 'doctor' can be used in a novel. 'Dr' is more of an abbreviation and is often used in a more informal or quick way of referring to a doctor character. For example, 'Dr. Smith entered the room.' gives a concise way to introduce the character. However, 'doctor' can be used for a more formal or when you want to emphasize the title in a full form, like 'The doctor examined the patient carefully, his white coat flapping as he moved.'
It depends on the context and the style you want to maintain. 'Dr' is more common in a formal or medical setting, while 'doctor' might be used for a more conversational or descriptive tone.
To a large extent, it is. The show takes inspiration from actual cases and tries to present a realistic account. However, there might be some artistic liberties taken for dramatic effect.
In Doctor Who Season 11, the story arc involves the Doctor's adventures as she faces new enemies and uncovers hidden truths. It has elements of science fiction, adventure, and emotional depth.
I think there are elements of political correctness in Doctor Who Season 12. The show often tries to address contemporary issues and promote inclusive values, which can be considered politically correct in a positive sense.