Andrew Kim - who’s been a Core77 discussion forum contributor for awhile now
had a podcast for awhile, just looked, looks like maybe it’s back…
The Wish List https://itunes.apple.com/us/podcast/the-wish-list/id565829535?mt=2
I really love 99% Invisible, some of them are a little boring, but not a lot of them.
RadioLab isn’t directly design related, but they talk about big concepts, connections, and topics highly relevant to design.
I listent to a lot of comedy podcasts, they often get into their creative process and it’s often interesting to think of in terms of a designer’s creative process and other random bits.
I’ve been listening to a lot of Nerdist and You Made it Weird for that. Some of the WTF episodes are great for that too.
I used to listen to a Graphic Design podcast, 36 Point, the reflex blue show. Discussion was often relevant to ID. They had Robert Brunner on atleast twice I think, those ones are worth checking out.