When the Douglas men feel sorry for Katie because of her husband's continued absence, they proceed to overwhelm her with attention by each one of them taking her out to the same restaurant each night.

A little first grader named Alfred develops a big crush on third grader Dodie Douglas -- much to her displeasure. When Uncle Charley invites him to dinner, Dodie tries to fake illness to get out of it. Very soon Alfred's mother reports that he is missing.

Katie decides to put the triplets in a nursery school during the day when she fills in for a friend as a secretary, a move that enrages Uncle Charley when he hears about it. Later, it becomes apparent that he goes missing every afternoon causing the family to worry.

Katie's triplets are spotted by a talent scout for a production company and are selected to appear in a television commercial. The temperemental Director yells when the boys misbehave and make a shambles of the studio. Grandfather Steve is asked to replace the actor doing the same so the boys will feel at ease.

Uncle Charley is persuaded to fill in as a Cello teacher to a small group of reluctant young music students. His teaching methods leave much to be desired as he makes sure that they practice and practice for the upcoming recital.

Polly fears that Chip is losing interest in her as a woman, and she takes some very dramatic steps to remedy the situation. Ernie gets the impression that the marriage is on the rocks when he finds out she is sneaking away from school and making mysterious calls to a man named Andre.

Katie Douglas takes a job singing in a small coffee house, but both Steve and Charley have their doubts about the man she is going to work for. After meeting the owner's wife, they realise she is in very good hands.

Barbara's natural enthusiasm bubbles over into an embarrassing evening for Steve and some of his business associates. Barbara explains to Steve that adrenalin gets her going in competition, and she is apprehensive when he is asked to play in his work's bowling team for fear she will make him lose concentration.

Childless young marrieds Chip and Polly Douglas suddenly find themselvs the temporary guardians of several young children including the triplets, when Katie flies to Peru for a weekend rendezvous with Robbie. Meanwhile, Steve, Barbara and Charley go on a camping trip and Barbara isn't exactly Mrs. Daniel Boone -- as Steve eventually finds out.

Uncle Charley leaves for a week's vacation in San Francisco but meanwhile, birthdays disrupt the Douglas household, when Barbara, Katie and Polly turn against their spouses over the men's apparent oversight.

Chip complains about Polly's lack of sales resistance because they have an apartment full of useless things. But she is trapped by a salesman into giving a dinner party for eight people in exchange for a free set of cookware.

Having no choice, Steve takes the triplets to work where a secretary offers to take them home until he is finished. However he accidentally loses her details and when she finally rings, she announces that the boys have run out the front door, much to Steve's annoyance.

The wedding day for Steve's Scottish cousin and bowling alley waitress Terri Dowling finally arrives amid the traditional confusion and tears. They leave for a three day honeymoon in Las Vegas but Uncle Charley is worried about the lack of thankyou from them.

Steve's Scottish cousin Fergus, after only one date with Bowling Alley Cocktail Waitress Terri Dowling, proposes but gets turned down by her. She feels inadequate to return to Scotland as royalty, but is eventually persuaded by Steve.

When Uncle Charley learns that Fergus is looking for a wife to take back to Scotland to provide him with heirs to carry on the family name, he takes out an ad in the local newspaper in an effort to rid the Douglas home of his nemesis.

Steve's look-alike Scottish nobleman cousin Fergus, comes to America looking for a bride to take back to his hometown of Sithian Bridge and moves in on the entire Douglas family, much to the dismay of Uncle Charley.