With Howard's hardware store about to face new competition, the Cunninghams decide they need to rent the room above their garage to generate extra income. Howard is shocked when Richie rents it to Fonzie.
Fonzie finds his his bike in pieces, and the search is on to find out who did it.
Worried that he's losing his cool, Fonzie attempts to jump 14 garbage cans on his motorcycle. The stunt will be televised on You Wanted to See It.
Fonzie crashes after a successful attempt to jump 14 garbage cans on his motorcycle and faces surgery to remove torn cartilage in his knee.
Needing to make a good impression for a prospective business deal, Howard asks Richie to take the "Prince of Porcelain's" daughter out on a date. Richie, however, already has big plans and asks Potsie to take his place and pretend to be him.
After being embarrassed at Arnold's by a couple of hoods, Richie wants to take a jujitsu class to learn how to defend and stand up for himself.
Because the high school was vandalized, Officer Kirk imposes a curfew. Richie suggests that they demonstrate against the curfew, get arrested, and fight it in the courts. While Richie, Potsie, and Ralph are in the restroom at Arnold's discussing their plans, the lights go out, and they discover they are locked inside after Arnold closes up for the night.
At his 45th birthday, Howard realizes that his life has been very dull up to this point, and he attempts to run away to Tahiti.
Fonzie poses as a police officer in order to stop a rumble between two rival gangs.
With Richie in a dating slump, Fonzie sets Richie and himself up on a double date with two of his girls, Laverne and Shirley.
With nothing to do for the Easter holiday, Richie, Potsie, and Ralph decide to rent a cabin at Lake Whitefish. They pretend to be adult businessmen in order to secure the cabin and get girls.
Fonzie provides a drummer, who is black, to play with the band at Richie's party.
Joanie develops a crush on Potsie after he sings to her at Arnold's.
Convinced that no girl could be attracted to him and that he's useless, Ralph threatens to enlist with the Marines.
Marion, tired of the monotony of everyday house chores, decides to enter a televised dance contest. When Howard won't participate with her, she secretly enlists the help of Fonzie. Arnold unwittingly tells Howard that Marion has been at Arnold's early in the morning with another man, and Howard becomes suspicious.
When his garage gets a new owner, Fonzie decides to quit. He is unable to find another job as a head mechanic, but, with Howard as his inspiration, vows to find his true calling.
Needing money to get tickets to a big football game, Richie, Potsie, and Ralph decide to babysit 15 children on the night of Mardi Gras.
With Potsie away, the guys try to get Fonzie to take his place as the band's singer for the Senior Dance.
Fonzie takes Howard to court after Fonzie's pigeon cage falls through the roof of his apartment during a blizzard. Fonzie claims the weight of the snow caused the roof to collapse while Howard claims it was the pigeon cage.
Richie, Potsie, and Ralph stage a beauty contest at Arnold's in order to meet girls. They plan to enter a plant into the contest who won't accept the prizes when chosen as the winner. Richie is uneasy about this but reconsiders when a cheerleader he's interested in enters.
Spike is an accomplice during a burglary at Arnold's, and it is up to Fonzie to set him straight.
Fonzie is forced to wear glasses after Ralph's father discovers he has astigmatism.
Arnold asks Fonzie to be the best man at his wedding, but Fonzie is resistant to the idea because of the "Fonzarelli curse." Arnold's fiance calls the wedding off when she thinks she'd be holding back Arnold's career.
Fonzie reunites with an old flame, Pinky Tuscadero, who is in town to perform motorcycle stunts at a demolition derby.
Though he's up against the two Mallachi brothers by himself, Fonzie is able to win the demolition derby. While waiting at the hospital for Pinky to be released, Fonzie tells Richie that he loves her and wants to marry her.
After having been in several fights recently, on the advice of the Cunninghams, Fonzie agrees to see a psychologist.
Fonzie's friend's pregnant wife stays with Richie at the Cunningham house while the rest of the family is away on vacation.
Potsie saves Fonzie from a fire at the garage. Out of gratitude, Fonzie grants Potsie any one favor, and Potsie wants to pal around with the Fonz.
To allow Richie to have a night alone with his girl, Fonzie allows him to use his apartment and claim it as his own. Fonzie needs some rest, so he sleeps in Richie's bed without Howard, Marion, and Joanie knowing.
Joanie enlists Fonzie to be her partner for a marathon dance at Arnold's. She desperately wants to outlast cheerleading captain Jill Higgins who had cut Joanie from the squad earlier. Prior to the dance, however, Fonzie's motorcycle breaks down, and he is forced to push it for 12 miles.
Richie, wanting to become a tough reporter, sets out to investigate the food at Jefferson High. During his investigation, he discovers that Fonzie is afraid of liver.
Kirk, the new acting sheriff, tries to exert his power by forcing Fonzie to leave town.
Richie falls in love with a Wisconsin Cola poster girl and poses as a successful hardware businessman in order to meet her.
Fonzie meets an older woman whose car he fixed and agrees to meet her the next day for doubles tennis at a country club.
Richie and the guys organize a time capsule for a school project. Howard agrees to let them use the vault at his store for the capsule, and Potsie accidentally locks them all inside.
To get some publicity, Al tries to have someone break a world record at Arnold's. Meanwhile, Fonzie's cousin, Angie, is in town for a visit and proves to be extremely clumsy.
Richie makes a lucky shot to win a basketball game and suddenly becomes a big hero.
Not having enough to do now that Richie and Joanie are growing up and because she feels as though she's a slave to Howard, Marion gets a job waitressing at Arnold's.
The guys discover that Fonzie has been going to night school so that he can graduate with them. Marion gave them this information, and she becomes worried that Fonzie will be angry with her for telling.
After passing make-up health exams and getting permission for Fonzie to participate, the guys arrange for aspects of the graduation ceremony to be sped up in order to accomodate the inclusion of Fonzie's speech.
Richie, Fonzie, Potsie, and Ralph receive notices from the army to report for physicals.
Thinking her life is dull and that she's always treated like a little kid, Joanie wants to join the Red Devils' gang.
Howard comes up with the idea for a trash compactor, and Fonzie becomes his partner to help him build it. They become very excited about the success they could achieve and present "The Gulper" to a corporation for consideration.
Fonzie gets a dog, and she escapes when Ralph and Potsie accidentally leave the gate open. Ralph tells Fonzie that the dog, Spunky, was stolen.
Ralph takes bets on football games at 10:1 odds. The Green Bay Packers pull out an unexpected win, and Ralph owes a lot of people a lot of money.
After crashing in a stock-car race, Fonzie begins to worry about what will happen when his number comes up. Al suggests Fonzie seek the guidance of his brother, Father Anthony Delvecchio.
The gang organizes a surprise party for Howard and Marion's 20th anniversary as clips from previous episodes are shown.
The entire gang goes to Colorado to help Marion's Uncle Ben at his dude ranch. They have to come up with enough money in five days to pay off Ben's neighbor who holds a note on the ranch. They also will have to keep the ranch up and running.
Richie is able to stop the out-of-control horses that are pulling a wagon Joanie is in. With the deadline looming, the gang is still short $1017.38 for H. R. Buchanan's note, so Fonzie volunteers to ride a killer bull for a $1000 prize.
Al accidentally hits Fonzie in the head with a serving tray, and he becomes blind as a result.
Richie makes up a story to tell Lori Beth when he's actually escorting a baton twirler to the fraternity dance.
Fonzie and his girlfriend's son are getting along together as if they were father and son, but his girlfriend reveals that she and her estranged husband are getting back together.
Joanie thinks she's found true love in Jefferson High's star quarterback. However, she sees him sweet-talking another girl, breaks up with him, and is faced with not having a date for her sweet-sixteen party.
Richie is writing a story about fears and phobias, and he finds out that Ralph is afraid of nearly everything. While Richie, Potsie, and Ralph are visiting a professor whose specialty is fear, lab mice become agitated. The professor concludes that it is a sign that a tornado is coming.
Al fears an old lady has cursed him.
Al thinks about taking on an investment partner to create an Arnold's franchise. When Al suggests consulting an accountant and lawyer before they complete the deal, the man he's dealing with calls in his goons to threaten Al.
Fonzie comes to think that he is allergic to girls.
Upset that the rest of the family is watching a football game instead of helping her prepare the Thanksgiving dinner, Marion reminds them of the meaning of the holiday with the story of the first Thanksgiving.
Richie is falsely accused of being the Kissing Bandit.
Howard and Al are co-chairmen of a Leopard Lodge fund-raiser. When the magician/escape-artist they hired injures himself while attempting the milk-can escape, Fonzie suggests another magician, the Amazing Randi.
Richie, who is running for class president, gets his picture taken at a massage parlor by his opponent. Richie thinks his campaign will be ruined if the picture gets out.
Fonzie receives a Christmas gift from his father but is reluctant about accepting and opening it. Meanwhile, Richie and Lori Beth argue about what they've spent on each other's gifts, and Joanie is upset at Howard for getting an artificial tree.
Joanie starts smoking to fit in with a club she's recently joined. Howard initially forbids her to smoke but, eventually, allows her to make her own decision. He is disappointed to find her smoking again later that night.
Richie temporarily takes over a local newspaper's advice column but only tells Fonzie about it. Potsie and Ralph, in an attempt to solve their continuous bickering problem, write in to Richie's column. Richie, via the column, suggests they literally draw a line down the center of the room and for Ralph to stay on one side and Potsie on the other.
Leather and the band audition for a television music show and are turned down. Leather's song, however, is stolen and recorded by another band.
It's their 23rd anniversary, and Howard and Marion are angry at each other over a rate-your-mate test they took in a magazine. Richie, Fonzie, and Joanie have arranged for them to take a second honeymoon. Marion angers Howard even further when she wants everything to be exactly the same as it was on their first honeymoon.
Ralph asks Leather to the annual military ball. Ralph, under the advisement of Fonzie, learns to act like a serious gentleman, and Leather, under the advisement of Marion, learns to dress and act like an elegant lady. Meanwhile, Marion continuously beats Howard at various board and card games.
Fonzie discovers thousands of dollars in counterfeit money hidden in a casket inside of a hearse he is working on. When he doesn't return from the funeral parlor after bringing back the hearse, the guys fear the worst.
Fonzie survives an explosion at the garage triggered by the counterfeiters. The counterfeiters don't know that Fonzie has survived, so a phony funeral is staged at their funeral parlor to entrap them.
A fencing champion from France visits UWM for an exhibition. After he insults Joanie and America, Richie challenges the champion to a duel.
Needing extra money, Chachi begins selling Incredo-Wax, a miracle product that will shine anything. Unfortunately, it has disastrous side effects and ruins everything it touches.
Facing failing his anatomy final, Potsie threatens to quit school. Fonzie tells him to use music as a tool to help him with the exam. Meanwhile, Joanie and Howard are at odds over her less-than-stellar report card, and Fonzie needs a new pair of boots.
Mork returns to 1950s Milwaukee to learn about relationships in this retrospective episode.
The Cunninghams and Fonzie go on vacation to Lake Pinewood. Richie and Fonzie get together with two lonely milkmaids, and, when their father catches them in his barn with his daughters, he says they will have to get married.
