Both twins finish their school year on shaky academic ground - and twin Fs in math mean they'll both be spending time in summer school.

The Roloff family kicks off their over-ambitious road trip in an oversized RV. They've barely left their driveway when the trouble begins.

On the second leg of the Roloffs' RV journey, Amy and the kids question Matt's trip planning wisdom during a scorching trek through the 128-degree heat of Death Valley.

On the third leg of their RV odyssey, the differences between the Roloff boys and girls are in stark relief, as Amy and Molly spend a peaceful day in Sedona, Arizona - while Matt and his rowdy sons get their kicks along a stretch of old Route 66.

The conclusion to the sprawling Roloff road trip finds the family retracing their roots in California.

It's planting season, and farmer Matt leads the charge to get this year's pumpkin and corn crops in the ground - while Amy, Molly and Grandma Peg plant a family vegetable garden.

A few months after major leg surgery, Zach feels recovered enough to compete in the Dwarf Athletic Association of America Games.

After his long recovery from leg surgery, Zach is back in action and ready to face his soccer rivals.

For the first time in his life, Matt customizes a car (his red VW Bug) to fit him perfectly.

Zach invites three of his dwarf buddies to Roloff Farms for a weekend of paintball, horseplay and sports.

The LP weekend continues as Zach and his three dwarf buddies wage an all-out paintball war with Jeremy and his average height friends.

Matt is set to give a motivational speech in Paducah, Kentucky, a town steeped in Civil War history, so he decides to bring history buffs Zach and Molly along.

The Roloffs scramble to get their passports in time for their family vacation to the Bahamas, which kicks off with a sailing excursion.

With the Roloffs' Bahamas trip underway, Jeremy discovers he has a knack for sailing.

As their Abacos vacation draws to a close, the Roloffs really connect with Bahamian culture.

Matt goes to the doctor for the first time in years and discovers that his health is in serious jeopardy.

After his doctors recommend swimming as a good way to improve his failing health, Matt decides to fulfill a longtime Roloff wish to build a family pool.

Matt promises that the Roloff's new swimming pool will be completed in time for Molly's upcoming birthday party. With much of the project still unfinished, Jacob suffers another head injury, sending him back to the hospital.

The twins take the tests for their drivers licenses. Jeremy approaches his test with total confidence, but Zach is typically less certain. With both of her sons becoming drivers, Amy must come to terms with Zach & Jeremy's increasing independence.

It's a tense time for the Roloff family as Matt goes to court to learn the date of his upcoming DUI trial. Matt works with Amy to prepare his defense, but a meeting with his trial attorney reminds Matt that going to trial is a roll of the dice.

Matt's DUI trial begins and the prosecution presents its case. When the arresting officer testifies against him, Matt grows increasingly concerned about his chances with the jury. Tension mounts as Matt prepares to take the stand.

With wife Amy in the courtroom for support, it's Matt Roloff's turn on the stand in his DUI trial. Matt's lawyer lays out the defense, and the prosecution's cross-examination is intense. Matt and Amy have high hopes for a not guilty verdict.

Matt arranges a surprise dinner for Amy to mark their 20th wedding anniversary. Meanwhile, Jeremy & Kirsten celebrate their first year together - and Zach is in the early stages of his first romantic relationship with an average height girl, Danni.

Matt and his artist buddy Sven plan to build a sawmill with a working waterwheel. But when Matt leaves Sven in charge of preparing the farm's attractions for a corporate party, Sven has his own ideas about what's important, and tensions rise.

Always looking to improve the attractions on Roloff Farms, Matt decides its time to revamp his old "Indian Village". But rather than embark on another trial and error, do-it-yourself project, Matt chooses to bring in a local Native American tribe.

Due to a scheduling snafu, Matt and Amy are set to go on a little people cruise during the critical first week of pumpkin season. Tensions are rising as the family scrambles to prepare before Matt and Amy leave.

With Matt and Amy away on a little people cruise off Mexico, pumpkin season at Roloff Farms in is chaos. Matt's substitute manager Becky clashes with Grandma Peg, and long lines, confusion, and foul weather push the whole operation to its limits.

A record-breaking Roloff pumpkin season requires all hands on deck, so when Molly shows up late for work with a bad attitude, Matt and Amy cut her no slack.

As Halloween approaches, Matt, Jacob, and Mike D. work to build a safer, stronger trebuchet. Ironically, both Mike D. and Jacob are injured on the one-year anniversary of the original trebuchet accident that sent them both to the hospital.

Amy takes Molly on a tour of Victoria, British Columbia for some mother-daughter bonding and a little whale watching. Meanwhile, Zach goes on his first real date with Dani, an average height girl.

Jeremy is repeatedly late for school and has his driving privileges revoked. Meanwhile, both he and Zach get into hot water over poor grades.

Concerned about their consistently poor grades, Matt and Amy enroll twins Zach and Jeremy in Sylvan Learning Center, where their studies get off to a rough start. Meanwhile, Jeremy displays his engineering aptitude by building a working hovercraft.

Matt and Amy's Little Person friend Rob Haines prepares to undergo a risky surgery to correct a dwarfism-related spinal issue. Once Rob is out of the operating room, Matt visits him as he recovers in California.

Matt and his friend Connie, also a dwarf, participate in a high school project designed to create LP awareness. Jeremy, Zach, his average height girlfriend Dani, and their friends join in a relief effort to assist families hit by a recent flood.

Matt embarks on an ambitious remodel of the Roloff house that soon proves well beyond his abilities to manage. With an architect and a general contractor already on the payroll, Amy wonders how they'll be able to pay for it all.

What began as adding a garage has turned into doubling the size of the Roloff house. The family's excitement about the extra space turns to dread when they realize that they'll all be living together in the den until the remodel is finished.

Zach invites Danni, his first average height date, to his high school winter formal dance. Jeremy takes girlfriend Kirsten, and the rest of the gang join them for a fun evening. Meanwhile, Amy departs for a motivational speech at a college in Iowa.

Amy is in Iowa where she gives a motivational speech at Cornell College. Before the big speech, she enjoys some winter fun with students. Meanwhile, Matt plods ahead with his ever-expanding home remodel.

With his continual modifications & upgrades, Matt's home renovation is out of control. Amy & the kids complain that their home is increasingly unlivable and when Matt realizes he's run out of money, everyone wonders if the addition will ever be done.

Matt Roloff shows his kids what competition is all about as he challenges them to do battle with him in the board game Risk. Though not yet a licensed driver, Jeremy gets his vintage pickup truck ready for the day he can drive it on his own.

Zach is caught off guard when 2 female LP friends arrive unexpectedly on the farm. As he struggles to find things to do with them, it's clear that Zach is not quite a lady's man. Amy takes Molly, Jacob & their friends to a blustery day at the beach.

Even though the water's cold, Molly and Jacob can't resist jumping into their pool in the first days of summer, but soon their horseplay results in Jacob getting hurt. Infected with summer laziness, the rest of the kids are slow to help with chores.

All the colors of Molly begin to shine. She's independent, ignoring the Roloff boys' soccer tradition, she begins another season of volleyball. She's motivating - she convinces the rest of the family to help her study Russian and plant a garden.

Along with their friends, twins Zach and Jeremy keep getting distracted as they struggle to complete their Swamp Fort - the project ultimately leads to an all-out paintball attack on the fort. Meanwhile, Matt installs an athletic court on the farm.

Although he's often wimpy, needy and smelly, the Roloffs' bull mastiff dog Rocky is a much-loved member of the family. The Roloffs in turn each share special moments with Rocky - and they all rally together with concern when he's injured.