Dallas is a long-running American prime time television soap opera that aired from April 2, 1978, to May 3, 1991, on CBS. The series revolves around a wealthy and feuding Texan 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.