When I was a young nerdling I would get up early Saturday to switch on the TV, and of the three, later four TV channels that we had the one I would go to for early entertainment at 6:30 a.m. was BBC 2 Open University.

And this is what I would watch, religiously:

https://archive.org/details/OUBBCS354Ep1Of17BeforeEinsteinUnderstandingSpaceTime/OU+BBC+S354+Ep+01+of+17+Before+Einstein+(Understanding+Space+%26+Time).mp4