Power, passion and duplicity drive this landmark saga set at the Southfork ranch, home of the oil-rich Ewing clan and ground zero for prime-time soaps in the late '70s and through the '80s. The most successful prime-time soap in TV history, 'Dallas' spawned the popular 'Knots Landing' and inspired a plethora of clones, most notably its chief ratings challenger, 'Dynasty.' It also ushered in the use of cliffhanger endings to bolster interest and ratings with its 1980 'Who Shot J.R.?' episode.