of hours that child actors could work. Since New York did not have such stringent laws at the time, and Duke already resided in Manhattan, New York, the network relocated production of the series to Chelsea Studios and moved the series location to Brooklyn Heights. Upon the series order, Miller declined to move on with the series. Schallert was hired after reading for producers, and reuniting him with his Byron, his co-star from The Many Loves of Dobie Gillis (which had ended the season before). Sheldon and Asher wrote and produced the series, with Duke's managers John and Ethel Ross also serving as associate producers. According to Duke and others, the cast and crew members were unaware of their abuse of her. William Asher initially served as producer. However, before going on the air, he had failed to finish a full-length episode. As a result, ABC assigned Robert Costello to produce, though he only remained until the twenty-fifth episode. Following his departure, frequent director Stanley Prager took over for the remainder of the first season, as well as the second season. Visual effects The dual role for Duke challenged special effects for its time, considering that television special effects were rare in the early 1960s, particularly for a sitcom. In all episodes, Duke appeared as both characters in the same frame through use of a split-screen effect. The technically ambitious traveling matte process was also used from time to time, particularly in the pilot. To complement these effects, child actress Rita McLaughlin was used as Duke's double (almost always seen only from behind). To differentiate the two characters to the viewing public, the character Patty wore a flip-fall hairpiece, while Cathy's character wore a more conservative turn-under hairstyle. Season Three and cancellation Midway through the second season, Duke celebrated her eighteenth birthday and fired the Rosses as her managers. As Duke was now old enough to work longer hours, ABC wanted to shift the show's production to Los Angeles. Duke initially was against the idea, but eventually agreed. With the move came new sets and new exterior shots, the latter of which seemed to place the home in an unnamed suburban neighborhood instead of Brooklyn Heights. During the second season, Duke had become romantically involved with assistant director Harry Falk, and married him during the third season. He was able to direct one of the final season three episodes –