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.
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.
A fencing champion from France visits UWM for an exhibition. After he insults Joanie and America, Richie challenges the champion to a duel.
Mork returns to 1950s Milwaukee to learn about relationships in this fifth anniversary retrospective episode.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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 is falsely accused of being the Kissing Bandit.
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.
Fonzie comes to think that he is allergic to girls.
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.
Al fears an old lady has cursed him.
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.
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.
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.
Richie makes up a story to tell Lori Beth when he's actually escorting a baton twirler to the fraternity dance.
Al accidentally hits Fonzie in the head with a serving tray, and he becomes blind as a result.
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.
The gang stages a rodeo in an attempt to raise money to pay off the note H. R. Buchanan holds on Marion's Uncle Ben's ranch.
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.
