Sadly, Billy Hinsche left us last November. A longtime contributor to The Beach Boys on stage and in the studio, Billy was also literally family as Carl Wilson's brother-in-law. Sharing info from Mark's in-depth interview with the man himself, we discuss his days in Dino, Desi & Billy, the official Beach Boys membership offer he got but couldn't accept, cowrites with Brian and Dennis, unreleased lead vocals on BB tracks, and much more. We hope this episode sheds some light on an important figure in the band's history.