1964: Following up their first appearance on ABC's Shindig! (performing "Little Saint Nick," "Dance, Dance, Dance," "Papa Oom Mow Mow," and "Monster Mash"), the Beach Boys board a flight from Los Angeles to a concert in Houston. During the flight group leader, Brian Wilson suffers a nervous breakdown. In the immediate aftermath, Brian retires from touring with the band. Prominent L.A. session guitar player, Glen Campbell (who had already been playing on many of the Beach Boys records) takes his place on stage. Campbell is eventually replaced by permanent member Bruce Johnston.