Patterson (as Miss Mason: "The Tycoons", 1964, and Miss Moore: "My Cousin the Heroine" 1965) Charles Nelson Reilly ("The Conquering Hero" 1963) Sara Seegar ("The Greatest Speaker in the Whole Wide World" 1966) Frank Sinatra Jr. ("Every Girl Should Be Married" 1965) Jean Stapleton ("The Raffle" 1965) Chad Stuart ("Patty Pits Wits, Two Brits Hits" 1965) Daniel J. Travanti ("Block That Statue" 1964) Bobby Vinton ("Patty and The Newspaper Game" 1965) Production Origins Following her Academy Award-winning role in The Miracle Worker, ABC became interested in developing a series starring Duke. The network enlisted writer Sidney Sheldon to develop a vehicle for Duke. Sheldon asked Duke to spend a week with his family at their home to generate ideas. During this time, he noticed that Duke had two distinct sides to her personality (later in life she would be diagnosed as manic-depressive), and so came up with the concept of identical paternal cousins with contrasting personalities. According to Duke, he successfully captured her personality in the two characters. In development, Cathy was initially from Scotland. Duke learned a true Scottish burr for the Cathy character. However, Duke's accent was done "so well they couldn't understand me", concerning producers that the viewers would not like or understand her with such a profound accent. Upon going into production for the series, Cathy had a "general European" background and accent. The pilot episode was filmed on New Year's Day 1963 at the Metro-Goldwyn-Mayer Studios in Culver City, California. Several differences in the pilot included the series being set in San Francisco; and Mark Miller and Charles Herbert portraying Martin and Ross Lane, respectively. Seasons One and Two Even before ordering the series, it was understood that production would shift from Los Angeles to New York City. In the previous decade, New York had dominated national network production. By the early 1960s, new formats and innovations such as coaxial cable service, film and video tape allowed for the industry to move to the West coast with the film industry. By 1963, most scripted programming was based in Hollywood, while New York served production for game shows (What's My Line), soap operas (As The World Turns), and late night shows (The Ed Sullivan Show). However, at 16 years old, Duke fell under California's strict child labor laws (known informally as the Coogan laws named after famed 1920s child actor Jackie Coogan), which curtailed the number