It's the last weekend of pumpkin season. Jacob and Mike are launching pumpkins with the trebuchet when something goes terribly wrong. The medieval catapult misfires, seriously injuring Mike and Jacob, and sending them both to the hospital.

Jacob and Mike are treated at the hospital for their traumatic injuries. While Jacob goes into surgery, Amy holds vigil at the hospital. Matt holds down the fort at home, fielding endless calls from the local media interested in the bizarre accident.

In light of the dangerous trebuchet accident, Matt decides to order a professional safety inspection of the entire farm. Meanwhile, Matt and Amy revisit familiar arguments over finances, and Amy struggles to impart the value of a dollar to the kids.

Before heading to Florida for a convention, Matt plots a surprise birthday party for Amy and Molly. He gives the twins money, and asks them to get everything ready in time for his return, but worries that they might not come through.

Jeremy's lackluster performance in school gets Matt and Amy thinking about his academic future. When Matt makes a motivational speech at a Pennsylvania college, he uses the opportunity to put in a plug for his C-student son.

The twins are 16 and old enough to get their drivers licenses. However, Jeremy must wait until his grades improve while Zach, who's still shaky behind the wheel, takes driving lessons. Meanwhile, Matt races his VW bug at a local drag strip.

After sitting out last season, Zach gives high school soccer another shot, but struggles to win the respect of his team. Jeremy is crushed when he fails to make the Olympic Development soccer team, while the twins' team has a shot at the playoffs.

When Matt offers a $100 bounty for the capture of a particularly bothersome mole, Jeremy's efforts to trap the rodent kick into high gear. Jacob's increasingly stinky feet can no longer be ignored, and Matt applies his own secret foot powder.

Matt turns a barn into a Men's Crisis Center where he can hang out with his sons, safe from female criticism. In the midst of the project, Matt discovers his childhood diary and Jacob has the ultimate camp out on the farm, complete with an apple war!

Matt hatches a scheme to raise cash by having truckloads of soil dumped on the farm, but an all-day caravan of dust and noise has Amy outraged. Still, when Matt shares his grand plan for the farm, Amy can't help but admire his passion and vision.

The twins, Jeremy and Zach, do their best to teach soccer to their kid brother, but Jacob's temper gets in the way. Amy is concerned about Jacob's casual attitude towards his schoolwork. Meanwhile, Matt and Jeremy take the family dog to the vet.

While Amy is busy juggling her kids' events, working 2 jobs, and doing her chores at home, she is suddenly taxed with finding host families for three visiting soccer coaches. Meanwhile, Matt impulsively decides to clean the house from top to bottom.

Zach has trouble keeping up when he & his much-taller twin brother Jeremy ride their bikes. But Zach hits the jackpot when his father Matt gets a team of designers and welders to build Zach a Little People-friendly bike, which helps Zach ride faster.

With just 1 week before Halloween, Matt decides to throw an impromptu Harvest Party to promote his pumpkin business. When Matt tries to enlist the Roloff kids' support for the idea, Zach storms off, annoyed by Matt's haphazard, last-minute planning.

Amy takes Zach to Oakland, California, for a consultation with a surgeon who will perform the operation to correct his bowed legs. They return home just before a powerful storm hits, causing destruction and a blackout on the farm.

After a quick Christmas celebration, the family departs for Oakland, California, for Zach's leg surgery. Matt, who went through countless surgeries himself, tries to reassure an increasingly anxious Zach.

The whole family, including Grandpa Ron and Grandma Peg, are in Oakland for Zach's leg surgery. Zach faces the operation with courage, but no one can prepare him for the pain he feels after the surgery.

Zach is home with a cast up to his hip and everyone chips in as he adjusts to his wheelchair, walker, and crutches. Meanwhile, Matt's actor buddy, Marty Klebba, swings by the farm to lift Zach's spirits and winds up in a wrestling match with Amy.

Matt decides to tackle the big problem in the Roloff house, his children's messy bedrooms. When a dumpster arrives in the driveway, Matt instructs the kids to empty their rooms into it. A lackluster response leaves Matt wondering how to inspire them.

As Jake's 10th birthday approaches, Matt orchestrates a major remodeling of the kids' bedrooms without much help from his sons. In an effort to motivate Jake, Matt enlists a family friend to give Jake's room a galactic glow-in-the-dark paint job.

Still in a cast from his leg surgery, Zach is stuck inside while his siblings play in the biggest snowstorm to hit in 20 years! With the high school dance just around the corner, Zach is afraid he'll be stuck on the sidelines in a wheelchair.

After months of recovery, Zach returns to Oakland to have his cast removed and to learn if his bowed leg was successfully straightened. Meanwhile, Matt encourages Molly's growing interest in geography with a visit to Rand McNally in Irvine, CA.

Zach's recovery from leg surgery is progressing as slowly as the remodeling of the kids' bedrooms. When the cast comes off, and Zach tries to ride his bike, kick a soccer ball, and run around too soon, he stands to lose more ground than he's gained.

Matt and Amy have two different approaches to try and get Jeremy to keep up with his schoolwork. Matt offers an incentive, but he soon realizes that it will take a lot more than an old beat-up '68 Camaro to get Jeremy going.

Matt is trying to juggle bulldozing a new pumpkin patch parking lot, repairing the Old West Town church, and finishing Molly's Castle. On top of all that, Matt works to complete the Men's Crisis Center.