Howard wants Christmas Eve to only include the family, but Richie discovers that Fonzie will be all alone.
Potsie sets Richie up with a girl known to have a reputation. Richie doesn't get far with her but leads Fonzie and others to believe he did.
After experiencing a few strange happenings, Richie begins to buy into the legend that the place where Ralph's Halloween party is to be held, the old Simpson house, is haunted.
With his dating style being cramped by Howard having to drive him everywhere, Richie convinces his father to buy a second family car that he can use on weekends. Richie persuades Howard to buy a car that Fonzie is selling, but his amorous plans hit the skids when he hears that it is stolen.moreless
Richie, Postie, and Ralph are forced to go cruising for girls in Howard's DeSoto after Marion dents Richie's car at the supermarket. They find three girls but, later, find their boyfriends who are members of a gang called the Dragons.
As a game-show contestant, Richie wins $3200 before time runs out for that week's show. After the show, he is given an envelope by the show's host that contains the answer to the $5000 question.
Spike, Fonzie's little cousin, takes Joanie out on her first date. Richie and his date act as Joanie and Spike's chaperones and discover them missing at the movie theater.
Howard secures a gig for Richie, Potsie, Ralph, and Bag to play at the Leopard Lodge dance. Fonzie is able to get the guys tuxedos, but, in return, he joins them as a member of the band. When Fonzie plays a loud bongo solo during a slow dance, Richie is chosen to give him the news that he's out of the band.moreless
Richie feels that he doesn't have enough privacy, so he decides to move in with Chuck. He quickly discovers, though, that bachelor life isn't quite what he expected it to be.
Arlene, a girl from Richie's past, is back in town, and Richie goes on a date with her. Very soon, Arlene thinks that Richie wants to go steady with her, and Richie tries to find a way to put her off.
Richie goes against Howard and, to get a girl, campaigns for Adlai Stevenson in the 1956 Presidential race.
Richie wins a date with a movie star, Cindy Shea, to a school dance, and Gloria breaks up with him because of circumstances surrounding it. Cindy, however, will only be able to meet up with Richie after the dance has started.
Fonzie asks Richie to watch after his girl, Denise, while he's out of town at a demolition derby. Denise, upon hearing what Fonzie's asked Richie to do, decides to test Richie's trustworthiness. Richie succumbs to temptation and makes out with Denise at Inspiriation Point, but he later finds out that she has mononucleosis.moreless
Richie is named R.O.T.C. squad leader but has trouble controlling his squad. After several warnings to obey his commands, he puts them all on report.
Richie and Potsie plan to host a poker night at the Cunningham house as Howard and Marion will be out of town. However, their plans change when three young women stop by after their car breaks down, and Potsie invites them to stay the night.
Fonzie comes to think that he is allergic to girls.
Al fears an old lady has cursed him.
Fonzie and Roger miss their flight to Minneapolis for a teacher's convention, so they agree to go with Potsie's friend, Omar, who has a small plane he uses for crop dusting and spreading ashes. Omar jumps out when there is trouble with the engine leaving Fonzie and Roger by themselves with no parachutes.moreless
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.