When pretty Carrie Newman and her mother Julia come to visit the Keaton's, Carrie's forward behavior sends Alex into a panic.
When Mallory's boyfriend Jeff arrives home from college and wants to go steady, she's elated, but it's soon apparent that he's a little awed by school and merely grasping at the familiar and she must decide whether to ""let go"" and accept the change in their relationship.
Alex anxiously awaits a crucial college recommendation from his English teacher and urges Steven and Elyse to butter Mr. Tedesco up on parents' nite at school - but the obnoxious Tedesco is so insulting that Elyse slugs him, and a horrified Alex entreats Steven to make amends.
After Mallory secretly submits a picture of Elyse and herself to an ad agency for a mother-daughter modeling contest, she's ecstatic to have won but dismayed and jealous when the reluctant Elyse becomes the star model.
Steven's assistant at the station is bright, talented, funny, witty...and in love with him. And it looks like Steven may be returning her affections.
When Alex takes diet pills for a lift during mid-terms, his dependency level increases daily.
While working as a DJ at the school radio station, Alex strikes up a telephone friendship with caller Lorraine Ferrar, who shares his love of swing music, and he and the attractive 40-year-old meet and develop a special relationship.
Steven and Elyse worry that Alex, who is the new coach of Jennifer's softball team, is pushing the girls too hard when Jennifer fails to jog all the way home he orders her to do 20 extra pushups.
A cynical Alex finds the spirit of Christmas in a dream, when he's shown shocking visions of the past and future by ghosts of Mallory and Jennifer.
Steven and Elyse realize how lucky they are when their friends come over for a visit, but are unaware that it will be for the last time.
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.
Elyse is chocked by her soon-to-be-divorced mother's quick and free-spirited plunge into the singles world, and sparks fly between the two women when Elyse can't help but interfere.
Alex discovers that his idol, young Uncle Ned, has a serious drinking problem when the bright, but ill-fated corporate whiz kid returns for a visit after losing another job.
Alex pretends to support the Equal Rights Amendment to impress a pretty feminist and winds up behind bars after championing the cause at a debate that turns into a riot.
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.
Alex courts disaster when he invites two dates to the senior prom and devises an elaborate scheme for escorting each of the unknowing girls on a night to remember.
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.
When Alex's pal Skippy discovers he's adopted, Alex helps him cope with the shocking news and accompanies the nervous teenager on a memorable meeting with his real mother.
Alex is so sure that he will be named valedictorian of his class that he can't cope with the thought of being defeated by a girl especially his girl so his budding romance with Rachel is threatened when she wins the honor.
In the hospital awaiting a tonsillectomy, Jennifer fears she may never see her family again and, while writing in her diary, she flashes back to regrettable incidents with each family member.
When Elyse lands a job with a top architectural firm, the load begins to get to her at work and at home.