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.

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.

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 colpisce accidentalmente alla testa Fonzie, che di conseguenza diventa cieco.

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.

In occasione del sedicesimo compleanno di Joanie, la famiglia Cunningham organizza una grande festa.

Richie cura la rubrica scientifica del giornale della scuola e, intenzionato a trovare del nuovo materiale per i suoi servizi, si reca con Potsie e Ralph dal dottor Himmel...

È la festa di Halloween e Alfred è convinto che una strega voglia copirlo con un sortilegio. Mentre Howard, Marion e Joanie sono alla loggia del leopardo, Richie, Potsie e Ralph cercano di togliergli la maledizione, mentre Fonzie tenta di fargli capire che è una sciocchezza.

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.

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.

Mork returns to 1950s Milwaukee to learn about relationships in this fifth anniversary retrospective episode.

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.