The title was inspired by the movie Sometimes A Great Notion (1971).
Andrew Rubin makes his second (and last) appearance as Monroe, the superintendent's son (his first appearance was in Oscar's Birthday); however, Oscar and Myrna act as though they're meeting him for the first time, likely because this episode was filmed first but aired second.
The ship shown in the short clip was Holland America Lines s.s. Statendam and actually did sail from New York through the years of the Odd Couple's production, the scenes inside the ship were shot in a studio.