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.
Coming home to Milwaukee after a summer playing with the band in Chicago, Joanie Cunningham tries to convince her over-protective father that she's mature enough to move away from home and continue her career in the Windy City.
Howard's teen-aged niece, K.C., comes to stay with the Cunninghams after a scandal closes her Houston boarding school while Fonzie hopes a night at the circus will help him win little Heather's heart when nothing else seems to work.
Fonzie surprises Ashley...and himself!...by asking her to go steady with him after throwing a party to introduce her to his family and friends; but when jealousy raises its ugly head, neither of them are sure they're ready to commit.
Howard Cunningham dreads his quarrelsome older brother's Christmas visit and little Heather Pfister asks Santa Claus to help her mother, Ashley, make-up with the parents who disinherited her for marrying against their wishes.