While the Hendersons prepare for Harry's first birthday party, they recall some of their memorable moments since his arrival.

While on a camping trip with his son and his co-worker, George is nervous because his co-worker keeps on playing pranks and later mistakes Harry for a monster.

Sarah is chosen to sing at the school dance with a new student but hesitates when she learns that he's blind.

Nancy welcomes the arrival of her pregnant sister, Emily, unaware that another arrival is soon to follow.

Harry is home alone and left to the fate of two burglars who think a Bigfoot might draw a big reward.

It's Halloween and Harry finally has a chance to get out. However, the Hendersons' neighbour, who is allergic to animal hair, becomes suspicious of Harry's "costume."

While George competes with an obnoxious co-worker for a promotion, Nancy's brother Brett moves in at home and is forced to contend with Harry.

George examines his life after he's trapped in a steam room and, in a heat-induced delirium, sees God. He decides to quit his job.

George's decision to quit his job and launch a magazine with Brett rockets the rest of the Hendersons into the job market.

Brett thinks a primitive mask can cure his ailing love life by casting a spell on Darcy's Swedish au pair Uma, and it seems to work; but his date with her is spoiled by Harry, who is strangely obsessed with the mask as well.

When Harry sets Ernie's pet parrot free, George and Nancy go shopping for a quick replacement.

Angered at the foul attitude of Ernie's baseball coach, Nancy meets his challenge and strikes out on her own as a coach.

The Hendersons suspect that all that glistens is not gold but their missing silver when Brett suddenly comes into a large sum of money.

Harry scores high on Ernie's IQ test, which changes the way everyone relates to Ernie especially when his teacher Ms. Hall comes to visit and encounters Harry.

The Hendersons are shaken when Harry, fearing impending danger, traps them and a menagerie of forest friends inside their home.

In a case of mistaken identity, a baby is left on the doorstep with a note claiming that Brett is the father.

Sarah tells her boyfriend about Harry and jeopardizes the Hendersons' secret, and her love life, when she invites him to dinner.

Nancy moonlights as an aid to a foreign official and suspects his possession of a chimpanzee is on the dark side of the law.

Harry's friendship with Brett, and George's interview with a beautiful author, set off a wave of jealousy in the Henderson household.

George tries to help his cousin, who broke the law trying to save a polluted lake and its fish population.

A businessman offers to buy George's magazine but the buyer's vision of yellow journalism makes George see red.

Darcy discovers the Hendersons' secret and her parents, who doubt her story, send for a psychiatrist.

A tabloid prints stories about a dangerous Bigfoot and turns the Hendersons' public life into a nightmare.

Nancy takes a seat as vice principal at Sarah's school, which doesn't sit well with Sarah and Lorraine.

Nancy's friend visits with her nephew, a boy who gives mischief a bad name.

When George's friend is bullied from a political race, George finds a write-in candidate: a Bigfoot with a pristine past.

Darcy's scheme to have her Albanian housekeeper deported goes awry when the woman finds herself a husband: Brett.

The Hendersons plan a weekend of laid-back happenings for Nancy and Brett's visiting mother, only to find she would rather party.

Harry brings home an old bigfoot, so the family consults Dr. Arnesen, who concludes he is preparing to die; Darcy introduces Brad to gorgeous Kate, but tells him she only likes brainy boys.

The media and an animal control officer discover Harry, so the family turn to sleazy talk show host Tony Lane for help.

With Harry's existence made public, the neighborhood is flooded with tourists, prompting angry residents to legally force Harry out.

When George's cousin Melvin breaks up with his fiancee, he goes to the Hendersons for some advice and comfort.

Family ties unravel when George's brother visits and turns the Henderson home into a New Age shrine for Harry.

Nancy finds stardom when she's asked to be in a commercial. In her absence, the family finds out how much they need her.

Hoping to join the "cool" contingent at school, Ernie arranges for Harry to be school mascot for Madison Junior High.

Everyone is skeptical when Brett's long-lost wife shows up after leaving him to pursue a movie career.

A French linguist studying Harry's speech speaks the language of romance to Sara and that translates into trouble.

George and Harry become hospital roommates when Harry visits George and drops a television set on his foot.

When Harry frightens shoppers, Brett sets out to change Harry's public image; but the documentary on Harry he produces demeans the family.

The Hendersons' lives are put in danger when Harry sees a philanthropist commit murder. (Part 1 of 2)

Murder-witness Harry becomes a target; but Nancy devises a daring plan to stop the murderer. (Part 2 of 2)

Nancy's fear of a mouse prompts George to hire an exterminator while Harry tries to protect his fellow creature.

When Sara's stage production of "Beauty and the Beast" lacks an actor to play the Beast, George gets an idea and Harry becomes Sara's co-star.

George is challenged by his church when he writes an article about Harry suggesting he is the missing link between apes and humans which leads to a boycott of "A Better Life."

George learns that shore waters are being polluted by a construction company owned by his friend and biggest advertiser.

When Sara considers enrolling at an arts college 200 miles away, an overprotective George has trouble letting go.

When George makes the "archaeological discovery of the century," he sees a chance to spend time with his dad, an amateur geologist with the emotions of a rock.

Ernie and Harry find a book of sorcery and cast a spell on Brett that makes him assume others' personalities.

Ernie explains his moussed hair and missed classes as follows: "I'm a man now. I've got my own trail to blaze." However, in the path of every pubescent pioneer is a protective mother.

George's Great-Uncle Mac from Scotland arrives to settle his affairs and die, which he does, but his ghost has some unsettled business.

Brett can't seem to choose between a witty waitress who wants a commitment and a more voluptuous cosmetician who doesn't demand commitment because, as Nancy says, "it has three syllables."

A publisher rejects George's book about Harry. In a retrospective, we get another look at the past.

Tefta pines for Brett, who loves Mary. Meanwhile, Yetta, a female bigfoot from China, and Harry pine for one another but they need to avoid a customs agent. (Part 1 of 2)

In the series finale, the Henderson family decides to help Harry and his dear Yetta marry and move to a cave in the woods. Tefta pines for Brett, who loves Mary. (Part 2 of 2)