Calendar was brilliant. I think it was the first time I fully appreciated the misery of the human mind in the face of various orbit periods that aren't simple integer ratios of one another. https://www.bbc.co.uk/programmes/p00548m9

Great Fire of London too. Pepys burying his cheese! https://www.bbc.co.uk/programmes/b00ft63q

Politeness. Social barriers were coming down, you were interacting with people of different rank, how do you not get into a swordfight? Also, the letter from the wife complaining about her husband! https://www.bbc.co.uk/programmes/p004y29m

I think they did all the big interesting things in history and then struggled with a lot of minor events that were hard to find interesting angles on.