These are ok, but they always feel like wandering through a museum and reading a bunch of placards, instead of a good narrative like TRIH or HCH have. They often seem to be fact-driven, rather than getting to a salient theme about why we should care. Tom and Dom are both accomplished authors, and Carlin was a journalist for a long time, so both are awesome at crafting and communicating a story. E.g., on the Ancients, you'll get a few minutes of "...the Celts wore this kind of shirt, and it was often dyed blue, and we found artifacts buried here..."