With Potsie and Ralph eager to impress the scouts too, Fonzie invites them and the Cunningham family to join him on his trip to Hollywood.
Note: This episode introduces Scott Baio as Chachi Arcola, Fonzie's cousin and future boyfriend (and later husband) of Joanie.
"The California Kid" challenges Fonzie to jump over a tiger shark on water skis, convinced that he will be too scared and back out.
Note: This episode introduces Lynda Goodfriend as Lori Beth Allen, Richie's girlfriend and future wife.
Fonzie is ill, and the doctor says he must go into the hospital the next day to have his tonsils removed, meaning that he will miss the Cunninghams' Halloween party.
Ralph is in love with Kitty, a beautiful young woman, who is in an unhappy relationship with the football team's star fullback, Rebel E. Lee.
After a friend of the family leaves his wife for a younger woman, Marion begins to worry that Howard might do the same to her and decides to try to prove to him that she's still young at heart—but goes completely over the top, Salome-style.
As the rest of the gang anxiously await news, Fonzie holds a bedside vigil to try to help pull his friend through.
During a somber moment at the Cunninghams, Leather plays the piano and sings while a montage of scenes from past episodes involving Richie are shown.
Recurring guest: Suzi Quatro as Leather Tuscadero It's Valentine's Day; and at Arnold's, as the gang exchange cards and gifts, Joanie daydreams about the romantic songs that they could sing to each other.
When Richie gets jealous of Lori Beth's friendships with other men, they argue and break up; but agree to go on a weekend trip where the band is performing with Leather & the Suedes.