The Patty Duke Show

• Kitty Sullivan as Sue Ellen Turner (seasons 1-2), Patty's frenemy. She was replaced by Roz and Monica Robinson in the third season.
  • Cindy Williams portrayed Sue Ellen in Still Rockin' in Brooklyn Heights when Sullivan was unavailable.
• John McGiver as J.R. Castle (season 1), Martin's boss at the Chronicle. He is not shown or mentioned after the first season.
• David Doyle as Jonathan Harrison (seasons 1-2), Richard's father who is a construction engineer.
• John Spencer as Henry (seasons 1-2), one of Patty's classmates.
• Kelly Wood as Gloria (season 2), one of Patty's friends.
• Marcia Strassman as Adeline (season 2), one of Patty's classmates.
• Robyn Millan as Roz (season 3), one of Patty's classmates.
• Laura Barton/Kathy Garver as Monica Robinson (season 3), Patty's rival. She replaces the Sue Ellen Turner character.

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),[3]^: 287 and so came up with the concept of identical paternal cousins with contrasting personalities.[3]^: 115 According to Duke, he successfully captured her personality in the two characters.[1]

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",[1] 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.[3]^: 120[1]

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.

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 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).[4] 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.[5]

William Asher initially served as producer. However, before going on the air, he had failed to finish a full-length episode.[6] As a result, ABC assigned Robert Costello to produce, though he only remained until the twenty-fifth episode.[7] Following his departure, frequent director Stanley Prager took over for the remainder of the first season, as well as the second season.

Duke as both Cathy (left) and Patty Lane.

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).[8] 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.

Midway through the second season, Duke celebrated her eighteenth birthday and fired the Rosses as her managers.[9] 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 – in which Patty and Richard contemplate getting married – which Duke said in hindsight "was not a good idea."[10]

The series was cancelled due to disagreements between ABC and United Artists Television (UATV) over filming the series in color. ABC wanted all of its shows for the upcoming 1966–67 season to be in color, while UATV claimed filming The Patty Duke Show in color would be too expensive.[3]^: 166 The series continued airing reruns on ABC in primetime until August 31.

The show's theme song, "Cousins,"[11] which has since been parodied many times over in pop culture (including Rocko's Modern Life where it was parodied as the theme song to "The Bloaty and Squirmy Show"), illustrates the two girls' differences: "...where Cathy adores the minuet, the Ballet Russe and crêpes Suzette, our Patty loves her rock 'n' roll, a hot dog makes her lose control..." The song was performed by a five-voice vocal ensemble called "The Skip-Jacks," which featured actress and Playboy model Stella Stevens.

William Shallert later stated that, in the third season, the series ratings plummeted after being pitted against Lost in Space.

Repeats of The Patty Duke Show entered local markets as early as September 1966, days after exiting ABC prime time. It remained a mainstay of daytime independent station programming well into the 1970s. A new generation of viewers was introduced to the series by Nick at Nite cable, broadcasting a lengthy five-year prime time run from September 19, 1988, to August 30, 1993. On June 30, 1995, Nick at Nite showed one episode of the series during their 10th anniversary celebration. In 2005, both Nick at Nite and TV Land aired another episode of the series in honor of Nick at Nite's 20th anniversary.

In 2008, This TV began airing The Patty Duke Show as part of an early morning classic TV block. Prior to this, the show had not appeared in national syndication since Nick at Nite dropped it from its lineup in 1993. As of 2019, episodes aired on Saturday and Sunday.

Reruns of The Patty Duke Show were seen on Antenna TV from 2013 until 2015 as part of that channel's regular programming schedule. From November 4, 2013, to April 6, 2014, The Patty Duke Show aired back-to-back episodes every day from 1:00–2:00pm ET; from April 7, 2014, to August 29, 2014, The Patty Duke Show aired back-to-back episodes weekday afternoons from 2:00–3:00pm ET; from September 1, 2014, to April 3, 2015, the show aired back-to-back episodes weekday mornings from 6:00–7:00am ET; from April 6, 2015, to September 11, 2015, it aired back-to-back episodes Monday-Friday from 9:00–10:00am ET. From January 4, 2016, to September 2, 2016, the series aired weekday mornings at 6:00am–6:30am on MeTV.

The show can currently be seen on Circle.

On April 27, 1999, the thirty-third anniversary of the ABC cancellation of The Patty Duke Show, rival network CBS aired the television film The Patty Duke Show: Still Rockin' In Brooklyn Heights, which reunited Duke, Schallert, Byron (in her final on-screen role before her death in February 2006), O'Keefe and Applegate. The film was meant to be a backdoor pilot to a revival of the series, though these plans never came to fruition.

In the film, Patty and Richard married after graduating high school, and had a son Michael (Alain Goulem) before an amicable divorce after nearly 27 years of marriage. Michael is married with a teenage daughter Molly (Jane McGregor). Patty works as the drama teacher at Brooklyn Heights High School. Cathy is widowed and living in Scotland with her teenage son Liam McAllister (Kent Riley). Martin and Natalie moved to Florida after Martin retired from The New York Daily Chronicle.

The film revolves around a Lane family reunion, where the family bands together against the plans of Sue Ellen Caldwell (portrayed present-day by Cindy Williams, since original portrayer Kitty Sullivan was unavailable) to tear down the high school for a shopping center. Patty and Richard also confront their continued feelings post-divorce, reconciling by the end of the film.

Several clips of the original series were shown as flashbacks. Kitty Sullivan is shown in one of these flashbacks.

In 2009, Duke reprised her dual roles from the show in a public service announcement (PSA) for the Social Security Administration, in which Patty asked Cathy about where she got her information about how to get Social Security benefits and other questions, such as how to apply online. The PSA was targeted toward baby boomers who were born or who grew up in the 1960s. In 2010, the surviving cast reprised their respective roles in a series of PSAs, again for the Social Security Administration.

Shout! Factory has released all three seasons of The Patty Duke Show on DVD in Region 1.