Joe Rogan occasionally has some super interesting podcasts where he invites an academic/expert or two out to talk about their specialisation. He listens, occasionally asking a question.

That's how I first encountered him - he was interviewing John Carmack. The later episodes were disappointing, but I spent a year keeping an eye on the guest list. There were maybe 4-5 really good interviews in that year.

In Our Time is like those good episodes but with an extremely high signal-to-noise ratio and generally better.