Actually Existing Socialism (also available on podcast apps, obviously)

Imo extremely underrated. It focuses on interviewing experts in their field - historians, anthropologists, journalists, etc. - on their area of specialisation.

It's a really good podcast if you like deeper dives and you're either looking to get hyped about books or you want to get the thesis of a book without doing the reading (I see you!)

The episodes interviewing Bruni De La Motte and Victor Grossman on the GDR are particularly good but basically all of the episodes are great.