Dallas is an American prime time television soap opera that aired on CBS from April 2, 1978, to May 3, 1991. The series revolves around a wealthy 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, oil tycoon J. R. Ewing grew to be the show's main character, whose schemes and dirty business became the show's trademark. When the show ended in May 1991, J.R. was the only character to have appeared in every episode.
The show was famous for its cliffhangers, including the "Who shot J.R.?" mystery. The 1980 episode "Who Done It" remains the second highest rated prime-time telecast ever. The show also featured a "Dream Season", in which the entirety of the ninth season was revealed to have been a dream of Pam Ewing. After 14 seasons, the series finale "Conundrum" aired in 1991.
The show had a relatively ensemble cast. Larry Hagman stars as greedy, scheming oil tycoon J.R. Ewing, stage/screen actress Barbara Bel Geddes as family matriarch Miss Ellie and movie Western actor Jim Davis as Ewing patriarch Jock, his last role before his death in 1981. The series won four Emmy Awards, including a 1980 Outstanding Lead Actress in a Drama Series win for Bel Geddes.
With its 357 episodes, Dallas remains one of the longest lasting full-hour primetime dramas in American TV history, behind Law & Order: Special Victims Unit (400+ episodes), Bonanza (430 episodes), Law & Order (456 episodes), and Gunsmoke (635 episodes). In 2007, Dallas was included in TIME magazine's list of "100 Best TV Shows of All-TIME".
Dallas also spawned the spin-off series Knots Landing in 1979 which also lasted 14 seasons. In 2010, TNT announced it had ordered a new, updated continuation of Dallas. The revival series, continuing the story of the Ewing family, premiered on TNT on June 13, 2012, and ran for three seasons, ending its run on September 22, 2014.