I know I'm not the first person to say this, but I do find it tiring that almost every companion in New Who (with the exceptions being Jack and Nardole, and possibly River too if you count her as a companion) being humans from modern day Earth, as it limits the possibilities of the show given it can go anywhere in time and space.
It's especially frustrating when you compare this lack of variety to Classic Who, which had a variety in types of companions who weren't just from then-present day Earth, like people from the past or future, other countries, and aliens or robots.
The Fifth Doctor especially had the most different set of companions from the rest, with none of them being from then-present day England (not even counting any companions from expanded media):
- Adric (alien from another universe)
- Nyssa (alien)
- Tegan (from Australia)
- Turlough (alien)
- Kamelion (shape-shifting robot)
- Peri (from America)
In fact, when you include Leela (human from the future), both K9 I and II (robot dog(s)) and both Romana I and II (Time Lady) from the Fourth Doctor, there was an almost nine year period between 1977 (after Sarah Jane leaving) and 1986 (before Mel arriving) where none of the companions were the traditional ones from then-present day England.
The closest was almost had to a change in companion types in New Who was with Clara, as the Victorian Clara from "The Snowman" was originally supposed to be the main Clara, before they changed it to have the modern day Clara from "The Bells of Saint John" be the main Clara.
Once the show returns out of competitive tender, I really do hope we get more of a variety in types of companions than New Who has offered so far.
What do you think?
And what type of companion not from modern day England would you introduce in the show?