My Three Sons S07E25 - Charley O' The Seven Seas

Uncle Charley's romantic tales of adventure captivates Ernie's teacher. The pretty, middle-aged lady is fascinated by the old boy's partially-true tales of his exciting life on the high seas. Soon the ex-seacook is aghast to learn she has given up her teaching job and he is further torn when she explains her savings will buy them both a one-way ticket to Pango-Pango and asks him to marry her before they leave.