Arthur "Fonzie" Fonzarelli (photo of Henry Winkler); Richie Cunningham (photo of Ron Howard); Howard Cunningham (photo of Tom Bosley); Joanie Cunningham (photo of Erin Moran); Marion Cunningham (photo of Marion Ross)
Howard Cunningham; Marion Cunningham; Richie Cunningham; Joanie Cunningham; Arthur "Fonzie" Fonzarelli; Jack Sprague (mentioned); Frank
Marion and Howard drive their kids crazy trying to decide what to wear to the Elk's masquerade ball. With Fonzie's help, they decide to go as Ann Sheridan, the Oomph Girl, escorted by President Teddy Roosevelt. They win an all-expense-paid vacation to Detroit.