The Backstory to Great Audio Storytelling, hosted by Rob Rosenthal, for Transom and PRX.
https://transom.org/topics/sound-school/
99% Invisible
99% Invisible is my new favorite podcast. A little bit RadioLab, a touch of This American Life, and a lot of Roman Mars, the producer. Roman talks about a bit about the design of the podcast and podcasting writ large.