Sherril Lynn (Katzman) Rettino was the daughter of Dallas (1978) producer Leonard Katzman. Leonard had his daughter play "Jackie Dugan" on the show. Before becoming Cliff and Pam's secretary, Jackie worked with Pam at "The Store" in the early seasons of"Dallas". She appeared in every season the show was on the air. Dallas si an American prime time television soap opera that aired on CBS from April 2, 1978, to May 3, 1991. The series revolves around an affluent and feuding Texas family, the Ewings, who own the independent oil company Ewing Oil and the cattle-ranching land of Southfork. The series originally focused on the marriage of Bobby Ewing and Pamela Barnes, whose families were sworn enemies with each other. As the series progressed, Bobby's elder brother, oil tycoon J.R. Ewing, became the show's breakout character, whose schemes and dirty business became the show's trademark. When the show ended on May 3, 1991, J. R. was the only character to have appeared in every episode. In 2007, Dallas was included in Time magazine's list of "100 Best TV Shows of All-Time". The show is mostly an ensemble cast, with Larry Hagman as greedy, scheming oil tycoon J.R. Ewing, stage/screen actress Barbara Bel Geddes as family matriarch Miss Ellie and Western movie actor Jim Davis as Ewing patriarch Jock, his last role before his deathi n 1981. The series won four Emmy Awards, including a 1980 Outstanding Lead Actress in a Drama Series win for Bel Geddes.