A love triangle involves Ben, Luke and a classmate.

Mike persuades Jason and Maggie to let Luke stay with them temporarily; then Jason's wine cellar goes missing.

While Jason and Maggie are away, the principal informs Mike that Luke's birth father is back in town -- and wants him back.

At Mike's high-school graduation, family members recall moments when it seemed like his graduation would never take place.

On a blind date shaping up as a disaster, Carol goes to the carnival, and finds unexpected fun and excitement.

Their grandparents give Mike, Carol and Ben $5,000 each.

Maggie is offered a plum job in Washington, D.C. The Seavers move to Washington, D.C., but share a final meal and memories in the empty house.

Mike goes to work as a substitute teacher.

Jason, Carol, Mike and Boner are arrested in the demonstration over the dismissal of Coach Lubbock.

Luke's father George visits the Seavers hoping that Luke has mellowed a little and would like to spend some time with him but Luke doesn't. He was about to leave when he collapses outside the door. He says that can't move, so they take him in. Jason and Ben offer to deliver his load, and they experience all sorts of chaos on the way. Mike thinks that George is faking his injury so that he could stay and Luke would have to talk to him. But the doctor tells Maggie who tells Mike that unless George stops driving trucks, he could become paralyzed. Mike talks to George and tells him to tell Luke but doesn't want Luke to pity him and doesn't anything else to do but be a trucker. Mike suggests that maybe he could open a truck stop. Luke finds George struggling to get up and they finally talk. The next day after Jason and Ben return, George tells them that he is giving up trucking and will open a truck stop and Luke's going with him. Luke says goodbye to the Seavers.

Ben gets spooked at the prospect of asking a girl to a Halloween party; Jason becomes a disruptive force at Lamaze class.

Mike takes Ben girl chasing.

When Mike lands a role in an off-Broadway play, he leaves college to pursue acting full-time in New York City.

Mike becomes roommates with sister Carol, now a Columbia University student.

Ben casts a girl he likes as the lead in his home movie.

The winter formal causes opposite problems for Carol and Mike.

Jason knows the editor offering Maggie a dream job is a notorious womanizer.

Mike and his friend Eddie schemingly join "Parents Without Mates" to meet women.

With Jason's wallet missing, the Seavers must rely on others to provide them with room and board while their house is being fumigated.

Christmas brings anger and angst to the Seavers.

Mike gears up for his big day as a TV soap opera star just as Luke gears up to move out of the Seavers'.

Carol lands in jail after a minor traffic violation.

A power failure causes dissensions in the Seaver household.

Maggie wants to fulfill a dream by climbing a mountain.

Maggie and Jason put Mike on the spot for Luke's curfew problems.

The ghost of Maggie's father oversees the Seavers' visit to her childhood home.

Mike and Amy continue to bicker their way toward Paris.

At the school's Parents Night, the Seavers learn Ben's been telling his friends that the girl he's dating is promiscuous.

Jason fumes when Maggie spends long hours on a toxic waste story with handsome co-worker Fred.

Jason embarrasses Mike at a Bruce Springsteen concert when they are interviewed together.

Mike teaches at an urban high school.

Though Jason had an insensitive Carol pitch in at the clinic, he objects to her dating an ex-con she meets there.

Jason buys an anniversary trip to Paris from travel agent Mike, who himself wins a European tour that falls apart; Maggie, in Paris, is struck with appendicitis.

In a moment of introspection as he prepares to graduate, Mike wrestles with self-doubt about his ability as a director.

Maggie's busy schedule leaves Ben feeling neglected.

Maggie teaches Ben at home after he is suspended from school.

Promoted at work, Carol decides against college.

Mike doodles on his aptitude test and winds up with an IQ score of 27.

Luke's homeless friend steals a Seaver momento.

Ben crams for a college entrance exam, but gets no help from Jason.

Maggie accuses Jason of monopolizing the children.

Mike's friend Eddie shows up for a double date with Mike's ex-girlfriend.

Maggie is hospitalized in Paris, while Mike finds himself stuck on the road with an angry customer.

Boner flunks out of college and joins the Marines.

Maggie gives an honest assessment of Carol's writing of an article for her school magazine; Mike and Ben discover track betting.

Jason and Maggie want to go to a mountain lodge for a weekend, but are reluctant to leave the kids alone.

Maggie goes back to work as a journalist, prompting psychologist Jason to move his office into their home so he can keep his eye on the kids. Things don't get off to a great start: the first night he gets a call from the police that Mike has been picked up for illegally driving a car.

Jason takes Maggie on a tropical getaway to lift her spirits after her father's death, trusting Chrissy to Mike and Carol.

An an intrafamily communications seminar, Mike and Jason discover just how alike they are.

Spring-cleaning breathes new life into the family's household objects, and each has a story to tell.

Ben assumes Mike's paper route for half the money.

During a tonsillectomy, Ben has an out-of-body experience, dreaming that he escapes with a friendly cabbie, only to find a new Ben has replaced him at home.

A proposed school dress code puts Maggie and Jason at odds.

Maggie and Carol share confidences at the beauty salon, but later Carol learns to her chagrin that a secret isn't safe with Maggie.

Chrissy starts spending much time with her imaginary friend, a six-foot-tall mouse named Ike.

Airlines passengers Jason and Mike must deliver a baby.

The Seavers begin to make room for baby, relegating Ben to the guest quarters and making the others lament the changes bound to come. Meanwhile, Maggie grasps for a way to tell her boss she is pregnant.

In an homage to The Twilight Zone, Ben awakens to discover he's Jeremy Miller, an actor on the set of ""Meet the Cleavers"".

The Seavers hire a nanny for Chrissy.

Julie and Mike suffer prenuptial jitters.

Custodian Mike watches a wild party explode in his home.

Mike is unaware that he's been nominated for student-body president because he's "a sure loser."

An angry Jason confronts Ben and Mike, who gives conflicting versions of how Ben came to sell Carol's old term papers to students at Dewey High -- and to date a seductive 18-year-old.

Jason can't tell Maggie about the job offer.

Carol accompanies Maggie to a resort, which turns out to be hosting a singles convention; meanwhile, the all-male weekend planned at home is ruined when Chrissy is set home with head lice.

A genealogy assignment unearths a dark family secret.

Maggie's quarreling parents come to visit the Seavers.

A girl raises a grade for Mike, then demands payment.

Jason punishes Carol and Ben unequally for the same offense when they are both caught after sneaking out for dates without permission.

An unearned "A" makes Carol doubt her academic record.

The Seavers' reception to raise money for a free mental-health clinic spells disaster when they forget the date of the party and must scramble at the last minute for a caterer.

Maggie's assignment interferes with anniversary plans.

Mike writes test answers on his shoe soles.

Carol wants to use radio-contest winnings on a nose job.

Great expectations turn sour at the Dewey High dance after Mike hears Lydia's voice; and Ben and Stinky find themselves in a seedy diner eyeing a pinball machine that pays real money.

Ben weighs the pros and cons of cheating after he learns the tricks of the test-passing trade from sly schoolmate Vito.

Mike backs out of the family-bowling match so he can date a snobbish girlfriend.

After their success in the school play, Mike and Monica set their sights on a Broadway audition for ""Our Town.""

A letter from the girl he met in Hawaii has Mike scheming to fly to Los Angeles to see her without his parents' knowing.

Burglars hit the Seaver home.

Maggie prepares her "Working Mother of the Year" acceptance speech.

Maggie arranges for Ben to meet his favorite rock musician.

Guests bicker at the Seavers' 20th-anniversary party.

A new school year brings boredom, bullies, and romantic mix-ups.

Jason and Maggie compete to write a newspaper column; Ben hates his glasses.

The family scrambles to help find an out-of-work Maggie a job after she turns into Super Mom, preparing oversize meals and assigning new chores.

His drama teacher and classmates intimidate Mike.

A travel snafu strands Julie with Mike.

Jason, happy to see his mother's second marriage crumbling, doesn't want to provide her with professional help.

The family is stranded in Maui. Ben videotapes Mike and Carol's Hawaiian romances.

Maggie wants Jason to fire the elderly handyman he hired to fix the furnace, but he refuses because the man is a friend.

Ben asks Carol's advice on getting a new bike from their parents.

At the school dance, Mike gets a girl and Carol gets raked over the coals. Meanwhile, Ben's adventure goes awry.

Jason intervenes when Mike gets bad grades in psychology.

Carol brings a bogus boyfriend to a family party.

Jason gets a promising job offer.

Maggie goes into labor on Ben's 12th birthday and Ben confesses to a patient at the hospital that he's already feeling crowded.

Mike gets involved when he learns his prize pupil Luke is homeless.