Slight, dark and intense, Barry Miller has proved an actor of extraordinary depth and versatility, frequently portraying nebbishy, intellectual and often surprisingly forceful characters. After making his TV-movie debut in "Brock's Last Case" (NBC, 1973), he played Mark Vitale, the elder of two teenage sons of Italian-American widower Joe Vitale (Richard Castellano) in the CBS sitcom "Joe and Sons" (1975-76). While he made his film debut as the younger incarnation of the title character in "Lepke," the 1975 biopic of the gangster Louis 'Lepke' Buchalter, Miller really first caught the attention of filmgoers as Bobby C, the depressed teenager who drunkenly falls off the Verrazano-Narrows Bridge in "Saturday Night Fever" (1977). While the role was showy, he was overshadowed by John Travolta, who garnered most notoriety. Instead of being propelled to a film career, Miller returned to series TV as one of the center kids on "Szysznyk" (CBS, 1977-78), a successful summer sitcom that was trounced in the ratings in the fall.