Buckley's mother suggests a specially cut, family heirloom ring as the ideal engagement ring for Kay, to Buckley's horror. But to Buckley's amazement, Kay thinks the ring is beautiful, and all goes happily until Father picks the ring up from the jeweler, who has reset it, and promptly loses it.

Kay sets out to show the Dunstans that she is more than just an attractive woman by insisting, against Ellie's warning, on making an exotic curry. All goes well until Tommy's pained cries ring through the house, where upon Stanley calls on Ellie to perform a last minute rescue operation.

Swearing Kay to secrecy, Agnes Ramsey reveals that she is secretly married and cannot be maid of honor at Kay's wedding. Agnes' parents, close friends of the Banks, react violently when they hear the news, causing a crisis in both households.

A large white elephant, without a card, arrives with Kay's wedding gifts. Its presence is treated as a prank, but Father learns the piece comes from his secretary and is a priceless antique. His fears grow as he arrives home just as a trash truck starts to pull away from the house.

On the day of Kay's bridal celebration, Ellie persuades Stanley to take Herbert, Buckley and Tommy fishing. But the expedition winds up a disaster when all but Tommy are hauled before a country judge and jailed for not having fishing licenses.

Tommy begins to worry about Kay and Buckley's compatibility when the two disagree over where they will spend their honeymoon.

At a stage luncheon for Buckley before his wedding, someone sets his watch back an hour as a joke and causes him to miss the wedding rehearsal, thus getting him into big trouble with Kay.

The day of Kay's wedding to Buckley finally arrives. It is during the reception at the Banks' home that an unexpected crisis develops. Upset by the appearance of Buckley's former girlfriend and by his forgetting his traveler's checks, Kay shuts herself in her room and announces she can't go through with the day.

After furnishing the apartment for Kay and Buckley's homecoming, both families receive a shock when the newlyweds return and find it completely bare.

Doris receives a letter telling her that a distant relative has died leaving an island and 145-room Norman Castle off the coast of Wales, which she will inherit along with a title if she can prove her descent.

Stanley invites an old-school mate, Bones Hammerstock, to stop by for a visit. He discovers that Bones is now a big, hearty muscleman and his wife is a veritable Amazon. Ellie recognizes the couple as ""The Hammers"" of health and exercise TV fame.