I’ve only recently discovered Song Exploder. It’s fantastic. The host gets some great interviews with the musicians behind pop songs, and they break one song apart track by track and talk about the story of the song one bit at a time.
I really enjoyed this one, about a great song I’d never heard before, inspired by the Space Shuttle Columbia Disaster.
If you’ve got 17 minutes, it’s worth a listen: http://songexploder.net/the-long-winters