Grandpa Libero returns to Rome to meet little Paola. Lele tries to convince Fanny not to continue the relationship, but she's truly in love. Giulio convinces Grandpa Libero to participate in a new program, Cambio Nonno (Grandpa Change). Libero accepts and finds himself with a new family, one from Lazio, to boot. Consequently, the grandfather of that family goes to live with the Martinis.