S12, E14: Sue Ellen launches into pre-production with writer Don Lockwood on the epic film that she hopes will finally bring ruin to the mighty J.R. Ewing. A lucrative deal for Bobby and Cliff is foiled when J.R. refuses to let Ewing Oil sell off important lands unless Bobby lets him back in to the oil business. Carter McKay's troubled son, Tommy, fresh out of a South American prison on a drug charge, arrives in Dallas and Cally searches for a way to make peace with John Ross.