Synopsis by Hal Erickson
Ray Bolger and Rosemary DeCamp make their first series appearances as Shirley Partridge's septuagenarian parents Fred and Amanda Renfrew. The Partridge kids are aghast when their mandolin-playing Grandpa decks himself out in the latest "mod" clothes and insists upon singing rock-and-roll tunes in the family act. It takes the combined efforts of Shirley (Shirley Jones), Grandma and the kids to convince Grandpa that he's better off sticking to the the songs of his own youth (and besides, Grandma isn't about to don a miniskirt just to make her husband happy!) Songs: "Baby I Love You", "I'm on the Road" and "Bye Bye Blackbird".