Jeannie C. Riley, 'Harper Valley PTA' (Season 6, Episode 10)
Like "Satisfaction," the use of this 1968 story song functions more as a period piece than any kind of deeper dive into the characters' psyches — but what a period piece it is. The smash C&W single tells the story of a woman in a small town who calls out the locals after she's criticized for wearing miniskirts ("Well this is just a little Peyton Place/and you're all Harper Valley hypocrites"). It provides the soundtrack for a freewheeling Los Angeles party attended by Roger, Don, and Harry Crane; there are hippies, girls in minidresses, and former SC ad man Danny Siegel, who’s now a caftan-wearing film producer. Another reminder that the world is moving on, and many of these Mad Men are still stuck in the past.