Joanie prepares a narrated home movie to send to big brother Richie's overseas army base to bring him up to speed on the gang's summer activities, her break-up with Chachi and Fonzie's reunion with his old gang, the Falcons.
Originally 2nd half in first airing,"continued" episodes in re-runs): Fonzie,after being called "normal" by a woman he's dating,is re-uniting with his old gang and they're confronted by rival gang "The Warmongers" at Arnolds to settle an old score. Meanwhile, Joanie is avoiding Chachi after discovering he had spent time with a girl at the lake while she was working there that evening. Lori Beth has revealed to everyone that,on her last visit to Richie in Greenland,has become pregnant with their 1st baby. Howard,learning that he's going to be a "grand-father" becomes ...
Misunderstanding rules the day when Roger discovers why pretty Mona Hildebrand won't date him, Marion uncovers one of hubby Howard's carefully kept courting secrets and Joanie gets flowers from a mystery man.
Joanie regrets agreeing to join a popular girls' club with friend Jenny Piccalo when the snobby club officers try to keep Jenny from passing the initiation ritual by altering it to include stealing a park statue.
While her parents week-end in New York and sister-in-law Lori Beth flies to visit faraway husband Richie, Joanie Cunningham must prove more than her babysitting mettle when she is challenged with both a sick baby nephew and a broken furnace.
Howard Cunningham promises a new car to daughter Joanie if she'll go to the University of Wisconsin instead of UCLA; but his determination turns to dismay when she decides that she doesn't want to go to college...at all!
Angered by a television broadcast showing a black man being beaten at a lunch counter for just wanting a meal, Al convinces Fonzie to head south to march in a week-end civil rights demonstration and it's not long before they both find out, firsthand, what's at stake for the black community.
Al Delvecchio promises to provide the guest entertainment for the local Leopard Lodge's musical, the 15th annual "Poobah Doodah"; but can he really deliver his fifth cousin, once removed...teen heart-throb Frankie Avalon?
Fonzie helps music teacher Cynthia take on the seemingly impossible task of trying to convince the Jefferson High School student body to choose classical music over rock'n'roll for their annual concert.
Howard and Chachi go above and beyond to try to win a dinner with the Lone Ranger for Fonzie's birthday while the Fonz begins to wonder if he should start thinking about settling down with just one girl.
When his parents send his rebellious, younger brother, Flip, for a visit, Roger needs his friends' help to find out why Flip behaves so irresponsibly and the two always seem to be at odds with each other.
Joanie starts spending much of her time with insecure new friend Mikki, who has recently come to Milwaukee to get a fresh start. A jealous Jenny learns that rumors had abounded at Mikki's old college that she had gotten pregnant and starts spreading the word. It isn't long before it is suggested that Fonzie is the father.