Mallory brings home her new boyfriend, Nick, a Rambo-type environmental artist, to meet her family, but Steven and Elyse are shocked by his crude appearance and gruff manner.

When Mallory informs her parents that she has no intention of going to college after graduation, they are sure she is being influenced by her boyfriend, Nick, a high school dropout. Elyse is crushed by Mallory's decision to forego a college education, and Mallory turns to Nick for support.

Mallory's boyfriend, environmental artist Nick Moore, swaps his T-shirt, camouflage pants, combat boots and earrings for a three-piece suit and a haircut to impress Mallory's parents, but while Steven and Elyse love the new Nick, Mallory is ready to leave him.

Mallory begins to feel severe guilt after reporting a young girl to the police for shoplifting, especially when he learns that the girl is from a home for abused children. Mallory visits Jessie at the home but is suspicious of the girl's intentions. Nick warns Mallory that she can't change Jessie overnight, but Mallory is sure that she can at least be a good influence.

Skippy's lifetime obsession with Mallory builds to a climax when he refuses to accept that she is in love with Nick, and creates an embarrassing scene at the Homecoming dance. Alex tries to convince Skippy he should forget about Mallory and find someone else, and even enlists the help of a psychiatrist, but Skippy can't let go of his fantasy.

Elyse enrolls in an auto mechanics class to prove Alex and Steven that women can be just as competent with cars as men, but to protect his own masculinity, Alex joins the class to prove her wrong.

Mallory suspects there's more involved than ""art appreciation"" when a wealthy and beautiful older woman takes a special interest in Nick's creations. Promising to help launch his career, art patron Victoria Hurstenberg takes Nick under her wing, occupying nearly all of his time and interfering with his relationship with Mallory, who insists that the older woman has her eye on more than Nick's art.

Mallory discovers that her high school graduation is in jeopardy unless she can pass a very tough history exam. Never an avid student, Mallory faces the possibility of failing her senior year in high school because of her poor grades. As the school term rapidly draws to a close, her only hope is to score extremely well on a tough final exam.

Nick and Mallory make sudden plans to elope when Steven and Elyse vehemently oppose their marriage plans and threaten to ground their teenaged daughter.

During a quiet evening together, Mallory pops the ""big question"" to Nick. They are ecstatic until they learn that the entire Keaton family is solidly against the idea.

Alex sees Mallory and Nick leaving the Keaton residence in the predawn hours to elope, and unable to stop them, follows them to New Jersey where he finds the young couple taking a hard look at their decision.

After Nick bumbles around the outside of the house with a 16-foot ladder, Alex makes a desperate attempt to keep his younger sister Mallory from marrying Nick. But they are too much in love to listen. It takes Erin and Mike, another couple, to give them perspective on their maturity.

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.

Nick faces a serious dilemma when he learns that to teach an art class he must have a high school diploma. Mallory volunteers to tutor him, but it takes the skills of another Keaton to help him prepare for his final exam.

When Mallory fails to make Nick understand grammar, Alex finds a unique way to help him grasp the basics.

Mallory's relationship with Nick is put to the test when she joins a poetry reading group and becomes infatuated with its handsome and sophisticated leader, English grad student Colin Spenser.

Newly exposed to poetry and enormously flattered by Colin's persistent attentions, Mallory begins to question the wisdom of being ""tied down"" to Nick.

Despite a stern warning about Colin's sincerity from one of his former conquests, fellow group member Joyce, Mallory is swept off her feet by his gift of roses and poetry, and agrees to join him for a special tete-a-tete following an evening's reading.

Her perspective, however, is shaken up quite a bit when she realizes that she is, in fact, just the ""next girl in line"" for the all-too-smooth Colin.

Steven and Elyse are forced to take a new closer look at Nick and his considerable artistic talents when they invite him to compete with other local artists to create a sculpture for the lobby of Steven's television station.

While Steven tackles the job of re-wallpapering the Keaton kitchen singlehandedly, Alex is in Chicago with his boss, Rebecca Ryan, attending an important banking conference. Forced to share a tiny room due to a shortage of hotel space, the two spend an awkward and uncomfortable nite together, with Alex relegated to sleeping in the closet.

Getting ready for the conference, Rebecca becomes more and more nervous as she prepares to meet the Federated Bank President Charles Okun, Jr. to try and facilitate a merger between his bank and Leland Trust.

Unfortunately, the champagne flows at the banquet and Rebecca proceeds to get thoroughly drunk. To Alex's surprise, she ends up insulting Okun and his young wife, totally blowing any prospects of a merger. Most embarrassing of all, Rebecca ends up making a pass at Alex.

Brother and sister go head-to-head when Steven announces a scholarship competition sponsored by his station, WKS. A confident Alex scoffs as the family encourages a reluctant Mallory to enter the competition. In spite of Alex's arrogant comments, Mallory prepares her fashion presentation for the competition and realizes that no matter what he says, she really wants to try. Alex discovers that he may have grossly misjudged his sister's business acumen as well as her sense of fashion. When the winner is announced, Alex and Mallory react to the news in a way that surprises even themselves.

Andy loses his favorite toy, Mr. Pig, causing Nick and Skippy to begin a topsy-turvy search of the household to comfort the devastated three-year-old. After their attempt to pass off a newly-bought imposter, Mr. Pig re-surfaces in a most unusual spot.

When Alex's friend Greg dies in a car accident, Alex is thrown into a state of shock and begins to seriously question the meaning and purpose of his own life. Having been asked to accompany his friend on the fatal trip and refusing because it wasn't convenient, he is overcome by guilt. He tries to fathom why he was spared in the face of such selfishness, and begins to have encounters with Greg's ghost. His family urges him to get help.

Jennifer develops her first major crush on science lab partner Tim Higgins, the handsome star pitcher of the school baseball team. When Tim comes over to work on their science project, Jennifer is thrilled, but also embarrassed by his open admiration of her academic talents. Believing the adage that boys never like girls who are smarter than they are, she decided the way to keep Tim interested is to play dumb.

Mallory is thrilled to follow in ""Dear Abby's"" footsteps when she's tapped to write the personal advice column in the Columbus Shopper's Guide. She manages to involve the entire family, even Alex, in reading and answering the growing stack of mail, while searching for the perfect letter to launch her career in psycho-journalism. Mallory finally settles on a note from a lovesick teen who signs her correspondence ""First Love"".

While Nick entertains the Keatons with a demonstration of the ""salesmanship"" he's using in his new job selling lightbulbs over the phone, an impatient Andrew waits for Alex to come home so they can watch a special edition of ""Wall Street Week"" together.

When Alex finally arrives, Andy is depressed to see that he has brought his new love, Lauren Miller. To make matters worse, Alex forgoes watching ""Wall Street Week"" in favor of spending time with Lauren, which only adds to Andy's frustration.

The Keatons are surprised, but delighted, when Elyse's Aunt Rosemary shows up for a visit. Although Rosemary claims to have sent a letter and spoken with Mallory about her arrival, the mix-up is quickly forgotten as the family warmly welcomes their loving and favorite aunt.

Rosemary charms the Keatons with her wit, humor and wonderful family stories. But soon, she begins to act strangely to simple questions, and Elyse starts to worry when Rosemary begins repeating things that have just been discussed. Finally, Rosemary admits that she has been having trouble with her memory and has no idea how she even got to the Keaton home.

Fearing the long-term effects of Andy's liberal upbringing with Its lack of strong gender identification, Alex tries to push his little brother into learning to play basketball, only to end up in some heated games of one-on-one with Steven.

Meanwhile, In an effort to supplement his income from teaching at the ""Y"", Nick naively applies for the job of Dean of Admissions of Grant College. When he's rejected, he lets Mallory persuade him to take the job as janitor of her sorority house.

When Mallory decides to run for student body president of Grant College, her family is surprised at her uncharacteristic interest in politics. She explains that ""it just sounded like a good idea"", and introduces Skippy as the manager of this rather unfocused campaign. Still her most ardent admirer, Skippy encourages the whole family to work on Mallory's behalf.

The Christmas spirit has come to the Keaton house, where the family is busy baking Christmas cookies when Skippy stops by to ask a favor. He wants Alex to pinch-hit for him as Santa at the mall, and Alex agrees after hearing about the excellent hourly wage.

With Mallory and Jennifer along as his wall-paid elves, ""Santa"" Alex dispenses stock tips and financial advice to long lines of children. Besieged by kids with elaborate Christmas lists, Alex is surprised when he's approached by a sad-looking little girl who insists she doesn't want anything for Christmas and doesn't believe in Santa Claus. Her mother explains that seven-year-old Michelle is very depressed that her father, a traveling salesman who is struggling to make a living, won't be home for the holiday.

The Keaton kids are dismayed when the local playhouse agree to stage Steven's radical 60's college play, ""A Draft Card for the Burning"". Embarrassed by the script's laughably dated hippie lingo, they are not surprised when Elyse refuses to reprise her leading role as Sequola Free, the play's sexy activist/anthropology student.

Alex is more than a little sceptical when Nick enters his sculpture "Spirit of Columbus", priced at $200, in an art show at the mall. but when Nick returns with the money and the news that he had several buyers vying for the piece, Alex decides that Nick is completely unaware of the marketability of his work. Appalled that Nick let potential buyers go away empty-handed, he insists that Nick increase the supply to meet the demand and steps in as Nick's manager for a hefty commission.

While Jennifer steels herself for a showdown with school authorities, Steven and Elyse prepare to back her up in her fight against the school board's book banning policy. Even Mallory gets into the act and shocks the family by falling in love with the forbidden ""Huckleberry Finn"", which she ends up reading aloud to Nick.

Nothing is solved at the meeting with the school principal, Dr. Hewitt, the head of the school board and Jennifer's English teacher Mr. Flaherty when the Keaton's refuse to comply with the new school ruling. Jennifer is crushed by the fact that Flaherty, whom she respects and admires, will not stand up to Hewitt and the board even though he claims to be completely on her side.

As Steven goes thru another one of his dreaded "magician phases" and tries to rope the whole family into participating in his magic tricks, the Keatons get a visit from Evelyn Mitchum, a former neighbor now living in New York, whose daughter Rosalie was beat friend with Mallory in junior high.

The family is delighted to welcome Evelyn, but the tragic suicide of her daughter a year earlier makes for some awkward moments when they reminisce about old times. Sensing that Evelyn may need someone to confide in, Elyse makes a gentle but unsuccessful attempt to get her to open up about her devastating loss.

When Evelyn turns her attention almost exclusively to Mallory, first inviting her to lunch, then on trips to the mall and the museum, Elyse begins to suspect that Mallory has become a surrogate Rosalie for Evelyn and warns Mallory she may get hurt. But Mallory insists she can and must handle the situation herself.

Nick again demonstrates his flair for teaching art by conducting a class at the "Y" for children, including Andrew. So popular is the class, in fact, that when the "Y" needs the classroom space back for another program, the kids and their enthusiastic parents are very disappointed. Mallory tells the family that Nick would really like to open up his own art school, and Alex escorts Nick to the bank to help him get a loan.

A family camping trip turns into a comedy of errors.

While the Keaton kids and Lauren argue about politics, Steven and Elyse decide it's time to get away from such serious concerns. They eagerly suggest that the whole family go on a camping trip, like they used to do. The kids don't share their parents' enthusiasm, however, and quickly come up with reasons why they can't go. As a result, little Andy is the only Keaton willing to go along with Steven and Elyse.

Alex feels left out when Andy begins spending less time with him and more time with Nick's streetwise nephew Rocco.

While Steven rages about the household bills, Alex worries about something else: Andrew's budding friendship with Rocco, Nick's visiting eight-year-old nephew. Andy quickly becomes enchanted with the boy, who's a pint-sized version of Nick and thus not exactly Alex's idea of a positive role model for his little brother.

In an attempt to get Alex to open up emotionally, Lauren persuades him to join a therapy group.

Returning from a date, Alex and Lauren arrive at the Keaton home and finish a fight they began in the car. Lauren resents the fact that Alex has dragged her to a boring economics department function and accuses him of avoiding any conversation which becomes personal.

While Steven fights for his life in surgery, the family fights to remain optimistic about his condition.

When Steven's surgery extends beyond the expected five hours, tension in the waiting room increases. A nervous Alex, however, begins to express acute concern only for himself fearing that he has inherited a weak heart, he searches in vain for his pulse. Lauren soon makes Alex realize that he is fixated on his own health to block the anguish he really feels for his father. While the Keatons wait, they receive hope and encouragement from Mrs. Hobart and Mr. Meyers, whose spouses are also undergoing surgery.

Steven battles the physical and psychological aftershocks of his heart surgery.

As the hours drag on during Steven's quadruple bypass operation, the Keaton crew grows exhausted in the hospital waiting room. Awakened by Skippy's typically goofy entrance, they all snap to attention when Dr. Harrison appears. He assures them that the surgery has gone well, but Steven must still be observed closely for the next few hours.

Sisterly sparks fly when Jennifer decides to date the younger brother of Mallory's former high school heartthrob.

As the Keatons try to persuade Steven that he needs a relaxing hobby, Jennifer nervously awaits the arrival of her new friend, Josh Wakefield, who has agreed to work with her on a project for the French Club. When Mallory realizes that Josh is the younger brother of Jeff Wakefield, her former high school boyfriend, she becomes overprotective and reminds Jennifer how Jeff jilted her when he went to college. Mallory just assumes that Josh will do the same to Jennifer.

Nick gets back together with his best childhood friend: his dog Scrapper.

When Nick's mother moves into a new apartment complex that doesn't allow animals, he is given custody of his boyhood dog Scrapper. Although the lovable pooch is quite old, he's still playful and manages to completely charm the Keatons.

When the first building Elyse designed faces the wrecking ball, the entire family rallies behind her attempts to block the demolition.

Elyse is heartbroken when she learns that her very first professional design project, the Cavanaugh Building, is about to be torn down to make way for a mini-mall. Disconcerted by the news, Elyse becomes more and more upset as she starts reminiscing about her early career and how much the Cavanaugh Building meant to her.

Mallory's plans to buy a car are stalled when Steven refuses to co-sign her loan.

As Jennifer labors over a play she's writing on the final days of the Nixon presidency, Steven anxiously waits for Mallory to return home with his car. When she arrives late and is chided by her impatient dad, Mallory suggests that perhaps it's time she bought a car of her own.

Steven must confront his true feelings about Mallory's boyfriend when Nick moves in with the family for a week.

While Elyse struggles to do the family taxes and Steven buries himself in his Tolstoy documentary, Mallory asks her parents if Nick can stay with the Keatons for a week while his house is being painted. Although Elyse gives in to Mallory's pleas, she warns her that Nick must be made to understand that Steven is very busy and should stay out of his way.

During the first night of Nick's stay, protective papa Steven parks himself in a chair on the stair landing to prevent any hanky-panky between the couple. When Mallory wakes Nick up early the next morning to cook breakfast for the whole family, Steven arises with a start and runs into the kitchen, demanding an explanation for their whispers and giggling. When they explain about breakfast, Steven becomes embarrassed and pretends to be sleepwalking!

When Alex lands his dream job in New York, everyone's delighted for him, except Elyse.

As Steven helps Andy rehearse for his school play on dental hygiene, Alex bursts into the Keaton kitchen with a rousing chorus of ""New York, New York"", and the news that he's been hired by one of Wall Street's biggest investment firms. The family is thrilled, but Elyse is somewhat taken aback when she learns that Alex is expected to move immediately.

While everyone pitches in to help Alex get ready, Elyse becomes miffed over a family photo that he packed without her permission and a palpable tension begins to develop between them. In the course of packing, Alex battles wits with Jennifer, accepts fashion tips from Mallory, receives fatherly advice from Steven and shares some final moments with Nick, Skippy and Lauren. All the while, Elyse continues to withdraw from him.