Seduced by an "older woman" of twenty-one, the hitherto inexperienced Alex is devastated to learn that she thinks of their relationship as casual.

Though Alex loves working at Mr. Adler's "Mom and Pop" grocery store, to the old man's dismay, he quits to "climb the corporate ladder" at an ultramodern supermarket.

Elyse's younger brother and Alex's idol, Ned, makes a surprise visit. However, everyone is puzzled by the go-getter corporate executive's suspicious behavior.

With the FBI hot on Ned's heels for embezzling 4.5 million dollars in corporate funds, Elyse's ethical brother and Alex's idol tells the family why and where he hid the money.

Alex gets stuck babysitting for his little sister Jennifer, who is fed up with feeling in the way at his poker game and decides to disappear.

While gearing up to face the TV cameras as captain of his high school's team on "Quiz Off," Alex panics at first when a teammate drops out. He then launches a major tutoring program for his sister Mallory.

In her zeal for good causes Elyse devotes so much energy to committee work that a neglected Steven feels shortchanged.

Ecstatic to have won an award for his public television documentary, Steven arrives home eager to celebrate, but every effort is foiled by Elyse's obligations to her various projects. Finally, the over-extended wife-mother-architect-committee volunteer begins to realize she's neglecting her most important committee.

On his 18th birthday, Alex defies his mother and goes off with some of his buddies to celebrate at an out-of-town niteclub, and to his dismay, the irate Elyse shows up and confronts him.

Alex is both amazed and furious when a critical admissions interview at Princeton University is shattered by his hysterical sister Mallory, who feels her anger over discovering her boyfriend kissing another girl is more important than his college education.

Alex is overjoyed at going to Princeton for the interview, but not too keen about taking his sister along so she can visit her boyfriend Jeff at the university. He drops Mallory off at Jeff's and heads for his important interview, only to be humiliated when he has to leave the meeting to comfort his weepy sister.

Mallory turns to Alex for some advice when she begins to fear she'll lose her new boyfriend unless she agrees to his pleas for a more ""adult"" romance.

Sixteen-year-old Mallory and eighteen-year-old Rick seem to have a special romance, and she fears that she'll ruin it unless she gives in to his request to enter a new phase of the relationship. Mallory becomes burdened with the question of what is the ""right time"" for the ""first time"".

Excited at the prospect of reviving her folk-singing career at a local niteclub, Elyse faces the skepticism of Alex and Mallory and an audience unattuned to the songs of the sixties.

Elyse is stricken with gambling fever on a business trip to Atlantic City, and while on a roll with Alex's "foolproof" blackjack system, she's oblivious to her family and job. Excited at the prospect of having his system put to the test, Alex urges his folks to "go for the gold", but Elyse insists her trip is strictly business. Finally, she's persuaded to try her hand at blackjack. Swept away on a seemingly endless winning streak, Elyse doesn't show up at the architects' convention, ignores her family's needs and casts all financial caution to the wind.

Alex is thrilled to be taking a college course taught by one of his personal heroes, Professor Ephraim Bronski, but in his eagerness to impress the teacher he gets off to a bad start and is humiliated by his idol when he fails the first class assignment.

Steven and Elyse plan a nostalgic weekend with the kids before the baby arrives, and are crushed to discover that the children are not at all interested in reminiscing about old times, they'd rather be with their friends.

Elyse's camping trip with Mallory and Jennifer is cut short when she realizes that the girls are bored to death, while Steven's plans to spend time with Alex at home are crushed when his son leaves on a date.

Because of Elyse's pregnancy, the family decides to get a housekeeper, so Alex hires the lovely Karen Nicholson, a totally incompetent young lady whom the family immediately adores but Steven insists she must be fired.

Despite the fact that Karen has no domestic skills and is rapidly destroying every appliance in the house, the kids love her and Steven has a difficult time trying to fire her.

Alex's chances or acceptance into a smug college fraternity are dependent upon his having a knockout date for the pledge dance and when the girl cancels he pleads with Karen, the housekeeper, to accompany him but his problems are far from resolved when they arrive at the dance.

Karen reluctantly agrees to be Alex's date, but does not tell him why she is so hesitant to go.

The Keaton family is transported back in time when Alex dreams he is at the Constitutional Convention at 1776, but history is off track. Steven Keaton is Thomas Jefferson and has just turned down John Adams' request to write the Declaration of Independence, so it's up to Alex to convince him to do it.

Alex falls asleep while working on a college term paper on Thomas Jefferson and dreams that his family and friends are living 200 years ago.

Alex implements a fail-proof, and extremely unromantic, method of meeting the girl of his dreams: He picks her from pictures in the freshman directory. His selection, Tricia, seems to fit his requirements perfectly, but his plan goes off-track when he is strongly attracted to her roommate, Ellen. Ellen and Alex dislike each other instantly, and though he can't figure out why, he finds himself thinking about her constantly.

Alex realizes he must make Ellen aware of his feelings, but she is on a train on her way to marry another man, so he takes drastic measures to stop the wedding. The usually cool Alex decides he must let down his defenses or lose the girl he loves.

When Terry Bridgeman, a colleague of Elyse's, confides that he has broken up with his girlfriend, Elyse decides to fix him up with a family friend, the beautiful Liz Obeck.

What Elyse doesn't realize, however, is that Liz has been seriously involved with someone else for two years.