But whereas the Lone Ranger only had one Tonto, "The Doctor" from 50-year-old British series "Doctor Who" goes through a lot of "Companions" -- so much so that new arrivals are met with fan anticipation and anxiety.

CNN: Actress Jenna-Louise Coleman talks 'Doctor Who'

There is only one Angolan doctor in Kuito - in fact she is the only local doctor for the million people who live in Bie province.

BBC: Mission impossible for UN in Kuito