AllMovie

Ray Bolger and Rosemary DeCamp return in the roles of Fred and Amanda Renfrew, the parents of Shirley Partridge (Shirley Jones). This time around, Grandpa Fred and Grandma Amanda have gleaned some rather strange ideas at an encounter group, and are going overboard in the efforts to embrace the "New Morality." Unfortunately, the Partridge kids aren't receptive to their Grandparents' new philosophy of total honesty and broad-mindedness, especially after an extended "truth session" leads to nonstop quarreling. But the madness ends only when Grandma herself concludes that Grandpa has gone too far with his new-found "openness."