EconTalk - interviews with social scientists about various topics. The interviewer is an economist so it's an interesting discussion between experts.

Economics detective radio - similar to EconTalk

Rationally speaking - interviews related to rational thinking.

80,000 Hours podcast - in depth interviews about the world's biggest problems and how to use your career to solve them. (Disclaimer: I used to work for them, but I genuinely love the podcast)

Feeling good podcast - by one of the pioneers of cognitive behavioural therapy, discusses mental health techniques.