Oliver unintentionally provides the motive for the residents of Hooterville to illegally receive more than $500,000 from the Internal Revenue Service. The locals think all they have to do is write in and state their losses--not understanding that they actually have to file taxes first. Eventually, to get its cash back, the IRS invests in Haney's monkey racing track.

Tired of Doris' nagging about having to beat their laundry on a rock in the creek, Fred buys a Grabwell washing machine from Mr. Haney. The boat motor in a barrel goes berzerk, spraying water and clothes everywhere before chasing the Ziffels out their front door. Oliver is more than happy to take their case and stick it to Haney in the courtroom.

Oliver sets out to harvest his tomato crops.

Lisa and Oliver are taken hostage by two bank robbers who hide out in their farmhouse.

Criminals rob a jewelry store in Chicago and stash their haul in a grain bin. The expensive gems end up packed in boxes of Crickly Wickly cereal shipped to Hooterville. Lisa knows real jewels when she sees them, but Oliver's sure they're just costume. After taking them to be appraised, the sheriff arrests Oliver for the jewelry store heist.

When the Ziffels go on a second honeymoon at Niagra Falls, they leave Arnold with Oliver and Lisa. While there, Arnold is drafted by the U.S. Army.

An unlikely but hilarious love affair between Arnold the pig and Cynthia the basset hound captivates the residents of Hooterville.

When Mr. Haney finds out first that the Douglas farm is the possible site for an interchange for a proposed new highway, he offers to buy back the farm.

Ralph, the lady carpenter, runs away from home and stays with the Douglases after having a fight with her brother, Alf.

Lisa invests $28 in a 10-year-old's "Electric Company;" to show his gratitude, the young wizard "electronificates" the Douglases' farm.

As part of an agricultural exchange program, Oliver and other Hooterville farmers are offered a chance to join a chartered government flight to Europe.

Oliver and Lisa chaperone Arnold's trip to Hollywood, where he lands a starring role in a motion picture.

Peterson's Poi Juice is giving away a trip to Hawaii and Arnold Ziffel is chosen as the winner. When the ad agency rep meets Arnold and discovers he's not a human, he tries to disqualify the swine. Famous pig lawyer Oliver Douglas is retained to fight for Arnold's winnings.

In just his first day as the School Board President, Oliver has started a grammar school protest. The kids are upset that their mascot, Arnold, has been thrown out for popping his teacher with a pea shooter. Fred asks Oliver to represent his "son" on grounds that he was discriminated against, but all Oliver can do is talk to the school's determined principal.

Oliver has to choose between being a farmer or lawyer when he gets an offer to practice in Washington, D. C. The official-looking letter, however, has the locals convinced that Oliver is hiding an juicy secret from them. After ruling out tax cheat and counterfeiter, that leaves only one choice: CIA agent.

The residents of Hooterville are in an uproar when Arnold Ziffel the pig is missing.

After Oliver orders the Monroe brothers to finish work on the bedroom, they confess that they never got a building permit. Oliver storms off to get one himself, only to discover his barn is in Hooterville but his house is in Pixley. Haney, who sold them the farm, offers to hook a rope to the house and pull it to Hooterville with his truck.

Oliver takes Arnold the Pig Chicago to receive Arnold's inheritance of $20,000,000. Arnold is a direct discendant of Herman, a pig who could predict the weather with his tail. However, Oliver soon finds it difficult watching after a pig in the hotel.

Oliver's angry over Hooterville's dirt road, especially after learning the money to pave it was appropriated thirty years earlier. Never content to leave well enough alone, he descends on the state capitol demanding that something be done. He makes little headway until Lisa mentions the name of powerful hot dog vendor Big Joe Haney.

Oliver's back on his soap box, delivering fiery patriotic speeches after getting a bill for the State Farm Unattached Duty Tax. No one in Hooterville seems to know what the tax is for, so Oliver tries to contact his assemblyman. That's when he learns Hooterville hasn't held an election for one since 1922. He and Lisa travel to the state capital to meet the governor and remedy the situation.

The Hooterville farmers have decided that Oliver is ruining the town's image by doing his farming chores in a suit. Oliver eventually gives in to their demand to wear overalls, but they weren't planning on the fur-covered pair that Lisa's dressmaker has designed.

The Douglases try to determine which of their hens is laying square eggs. Once word gets out, Haney and a chicken breeder both want in on the action. Oddly, the cube-shaped eggs don't worry Oliver nearly as much as their toaster that operates when you say the number "five".

The only thing Oliver learns at a farming convention is how to get a hangover. He and Lisa meet up with Charlie, a former gangster-turned-farmer, and Wanda, his floozy dancer wife. The more Charlie talks about his farm, the more Oliver's convinced that his shady days are not in the past.

When the cast takes ill, the Douglases take to the stage in a charity production of The Beverly Hillbillies. After Eb "punches up" a script from the series, Hank Kimball plays Jed Clampett, Oliver appears as Jethro and Lisa portrays Granny with a combination Hungarian/southern accent.

Eb becomes obsessed with winning a contest on a Pixley radio station. To identify all the songs, he has to listen day and night. That becomes even harder after Elenaor the cow swallows the radio Oliver just bought Eb for his birthday.