Just like Darrin was replaced on Bewitched, groups have swapped out original members, hoping we wouldn't notice.
Doubt led to drive for Francis, who still isn't sure why one of Status Quo's biggest hits is so beloved.
When he joined Guns N' Roses in 1990, Matt helped them craft an orchestral sound; his mezzo fortes and pianissimos are all over "November Rain."
Kristian talks songwriting technique, like how the chorus should redefine the story, and how to write a song backwards.
"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.
Joe talks about the challenges of of making a Duke Ellington tribute album, and tells the stories behind some of his hits.