Dallas - Season 4 (1980)

Sue Ellen is charged with attempted murder, but the charges are dropped when the real assailant reveals herself and her shocking secret.

Pam resents the time Bobby is spending at work. Bobby tries to impress Jock by buying a refinery for Ewing Oil. J.R. tries to sabotage Bobby.

Jock is caught between the feuding Bobby and J.R. Miss Ellie insists Jock keep Bobby at Southfork whatever it takes. Bobby makes a deal for Venenzulan oil for the refinery. Lucy introduces Mitch to her friends.

Bobby has a setback at Ewing Oil. Ray Krebbs' father, who ran out on the family shows up looking for money in return for telling Ray who his father really is.

Bobby has to deal with an extortionist threatening to blow up the Ewing 23 oil field, a task that is complicated when J.R. takes a hand in things. Ray discovers that Donna is seeing Cliff.

Pam's detective believes he has found her mother, but the reunion does not turn out as Pam has hoped. Lucy asks Mitch to marry her. J.R. continues to plot against Bobby.

J.R. encourages Jock to make a business investment he knows will interfere with Bobby's plans. Pam resents Bobby's obsession with Ewing Oil. Lucy announces her engagement to Mitch, which doesn't meet with her family's approval.

Bobby enters a deal that will get Ewing Oil back into the cartel, but for which he doesn't have the promised capital. Mitch's mother and sister, Afton, arrive in town for the wedding. J.R. takes an interest in Afton, which worries Sue Ellen.

Lucy is getting married. But the happy event is clouded by Bobby's resignation from Ewing Oil, and Miss Ellie's frustration with Jock over Gary.

J.R. hires a public relations consultant, Leslie Stewart, to improve his image. Bobby gives up Ewing Oil. Sue Ellen toys with cheating with an old college beau named Clint Ogden. Things start to get rocky between Miss Ellie and Jock.

J.R. takes steps to finance overthrowing the government that nationalized his Asian oil fields. Leslie Stewart continues to resist his advances. Bobby tries to buy a solar energy company, worrying Pam. Cliff is upset by Donna. Miss Ellie's resentment of Ray's relationship with Jock grows.

J.R. takes the reins of Ewing Oil in earnest and starts to wheel and deal. He calls in markers to keep Cliff out of political office. Sue Ellen believes she is being followed.

J.R.'s counter-revolution brings the oil wells back under private control, which reconciles him with the cartel. Ray proposes to Donna. Mitch and Lucy continue to fight over money. Sue Ellen discovers Dusty Farlow is alive.

Donna and Ray get married. Miss Ellie discovers Jock is one of the backers of a development she's been campaigning to stop. Bobby hires Cliff to be his consultant. Lucy gets a modeling job, further upsetting Mitch.

Bobby gets caught between Jock and Miss Ellie. Pam's mother reappears. J.R. is manipulated by Leslie Stewart.

Jock and Miss Ellie contemplate divorce. J.R. hatches a plan to sell Ewing Oil to avoid seeing it broken up in a divorce settlement. Mitch continues to resent Lucy's "Young Miss Dallas" job. Cliff starts to suspect J.R.'s interference in the Asian revolution. Pam warns their mother not to trust Cliff.

Bobby finds a compromise on the Takapa project, but this fails to reconcile Jock and Miss Ellie. Ray and Donna confront Miss Ellie about what they suspect is the real problem. J.R. makes arrangements to sell Ewing Oil. Pam tells Cliff their mother is still alive.

Jock and Miss Ellie go on a second honeymoon, which is bad for J.R.'s plan to sell Ewing Oil. Donna threatens J.R. when he sets Ray up for failure. Cliff is conflicted about meeting his mother. J.R. and Sue Ellen's peace is broken by a call from Kristin.

Kristin returns. Dusty and Sue Ellen reunite. Lucy moves out of the condo. Cliff brings evidence against J.R. to the senate committee. J.R. plans his divorce. Cliff meets with his mother.

Sue Ellen leaves J.R. but he prevents her taking John Ross with her. Sue Ellen asks Pam for help. J.R. manages to squirm out of the Senate investigation. Cliff accuses Bobby of helping him. Bobby asks Cliff to meet him at Southfork to discuss it. Cliff makes a shocking discovery when he arrives there.