The things you find on the internet! From 1955 the first episode of the Captain Z-RO show featuring the time traveling explorer going back to 1492 and the discovery of the New World by Columbus. Obvious low production values, but it holds up well compared to the appalling drek that mostly makes up TV fare today.
https://www.youtube.com/watch?v=-hyjjR5-wio
History lessons in a sci-fi TV story. Amazing. But not on today’s TV.