Richie feels he is lacking privacy at home, so he decides to move in with Chuck; but Richie soon discovers that bachelor life is not all it's cracked up to be.

Arlene is back in town, and Richie goes on a date with her. But very soon, Arlene thinks that Richie wants to go steady with her, and Richie tries to find a way to put her off.

Richie finds that he has a problem asking girls out on a date. After reading a book about abnormal psychology, Richie becomes convinced that there's something really wrong with him, and seeks help from a psychiatrist.

Marion and Howard are apprehensive about Joanie's first date. Their worries deepen when they learn that her date is Fonzie's young nephew Spike. After a talk about the birds and the bees, Richie is instructed to use his own date to keep an eye on his little sister.

Richie is a contestant on a TV trivia game show Big Money. Richie's friends and family all help him brush up on his baseball knowledge—but then he is given an envelope by the host (Dave Madden) with the answers. Will Richie follow his conscience or take the money and run ?

The gang is looking forward to spending Christmas with their families, but Richie discovers that Fonzie will be spending his all alone; so he invites Fonzie home to spend Christmas with the family.

Fonzie suddenly announces that he is getting married, and Howard recognizes the girl (Nellie Bellflower) as a stripper he saw at a hardware convention in Chicago.

Richie stays at home sick while the rest of the family take in a movie at the theatre. But then he hears noises downstairs, and finds himself face to face with a burglar, who forces him to help gather up the family's valuables. Guest Stars: Herb Edelman and Lora Marie Taylor.

It's election time, and Richie decides exactly which candidate to support—the one a cute blonde girl is campaigning for. But Richie becomes a victim of politics when his campaign efforts for Adlai Stevenson fall on the wrong side of Howard's political views. Meanwhile, Fonzie supports Dwight Eisenhower.

With Marion having dented Richie's car; Richie, Potsie, and Ralph are forced to use Howard's DeSoto to go cruising for girls to ask to an upcoming dance. But the girls they meet are girlfriends of members of the Dragons, a local street gang who challenges them to a drag race.

Richie inadvertently makes out with Fonzie's girlfriend, and fears he may have contracted mono.

Richie, Potsie, and Ralph go on a trip to Chicago with the school choir. Not wanting to stay in their hotel room all night, Ralph convinces them to sneak out and see a comedy show at a burlesque house.

Notes: George Furth, Lora Marie Taylor, Pamela Myers, Phil Leeds and Helen Page Camp guest star. This is the last episode of the series where Rock Around the Clock is the theme song. This is also the last episode to have the original version of "Happy Days" as the closing theme.