"Happy Days: The Complete Second Season" finds Garry Marshall’s immortal, 1970s sitcom hitting its stride with 23 episodes that continue to be built around Milwaukee native Richie Cunningham (Ron Howard) and his family and friends. But there’s also a clear strengthening of one of the show’s eventual, major elements: the close, if unlikely, friendship between Richie and Arthur "Fonzie" Fonzarelli (Henry Winkler). As always, Richie is angling for a way to grow up faster, often getting in over his head. In "Richie Moves Out," the red-haired teen tires of trying to kiss his girlfriend in the goldfish bowl of his house, so he agrees to live with his older brother while finishing high school and holding down a job. The result: there’s no time for making out when one is that busy. A similar scheme backfires in "Richie’s Car," when the Fonz converts a racing vehicle into a family-friendly, second car for the Cunninghams, only to find after the fact that it’s probably stolen. "Fonzie Joins the Band" sees Richie having to stand up to, and disappoint, his greaser pal when non-musical Fonzie presumes to join Richie’s band in exchange for outfitting them in slick tuxedoes. Fonzie looks surprisingly downhearted, too, in "Richie’s Flip Side," in which straight-arrow, young Cunningham gets a job as a disc jockey and develops an unbearable ego. In "Goin’ to Chicago," Richie, Potsie (Anson Williams) and Ralph (Don Most) go on an overnight field trip to the Windy City and discover that stepping into the adult world (they visit a nightclub and end up with a whoppping check they can’t pay) takes some preparation and experience they don’t yet have. Tom Bosley and Marion Ross still look, in retrospect, as wonderful in the roles of Richie’s parents as they did in the early ‘70s. "--Tom Keogh"