"Dead Skunk" became a stinker for Loudon when he felt pressure to make another hit - his latest songs deal with mortality, his son Rufus, and picking up poop.
Martyn talks about producing Tina Turner, some Heaven 17 hits, and his work with the British Electric Foundation.
The leader of the Modern A Cappella movement talks about the genre.
The stories behind "Whole Of The Moon" and "Red Army Blues," and why rock music has "outlived its era of innovation."
The guy who brought us "Stacy's Mom" also wrote the Jane Lynch Emmy song and Stephen Colbert's Christmas songs.
The trail runs from flying saucer songs in the '50s, through Bowie, blink-182 and Katy Perry.