The Peter principle is the observation that people are "promoted to their level of incompetence." I never really understood clearly what that meant, but hearing the creator talk about it, it made total sense.

Also the 1970s BBC television music, quality audio, calm shots and straightforward editing are a treat. So different to today's TV/screen genre of content "desperate" for your attention trying to hijack it with sensory overload - that everyone gets numb to, anyway.

more direct link: https://www.youtube.com/watch?v=39wzku9KIEM

(couldn't find it in the Beeb's site, sorry)