Sue Ellen is planning John Ross and Pamela's wedding. However the united Ewing front can't last for long as John Ross gets into a conflict with Bobby over the ownership of the ranch. He's also meets up for an illicit liaison with Emma. Whilst Christopher and Elena are still at odds as Elena returns to Dallas with a secret agenda.

John Ross goes to great lengths to keep his plans for Ewing Global moving forward; Sue Ellen's alliance with her son is threatened; Emma enlists the help of her grandmother; Bobby and Ann investigate Ryland's release from jail.

Bobby tries to outmaneuver John Ross; Christopher makes a discovery about Nicolas' past; Emma's games jeopardize John Ross and Pamela's wedding.

It's wedding day at Southfork and Afton, Ray and Lucy return for the occasion. The only one missing is the groom, John Ross, who's skipped out to strike a deal with a family adversary. Meanwhile, Christopher returns from Mexico to witness Nicolas and Elena's relationship deepening, and to his surprise finds a new burgeoning romantic connection. As Pamela wonders what's keeping John Ross from the nuptials, Sue Ellen fears it's Emma and contemplates stopping the wedding.

Bobby and Sue Ellen try to keep John Ross from becoming like his father; Christopher makes a discovery about Heather's past; Cliff persuades Elena to try a new tact; Judith, Ryland and Ann try to get Emma under control.

John Ross scrambles to keep the Arctic lease deal alive; Elena and Nicolas get Pamela and John Ross out of the office; things get complicated for Christopher and Heather; Ryland's plot takes an unexpected turn.

Bobby and Ann work to get Sue Ellen released; John Ross enlists the help of one of J.R.'s last business partners; secrets come to light; Elena makes a decision; Drew returns to Dallas.

Pamela discovers that John Ross has been sleeping with Emma; Christopher and Heather must deal with Bo's drastic action; Elena and Nicolas' relationship is tested.

The mid-season premiere finds the Ewing family searching for answers as to who set the fire at Southfork Ranch and who will survive. While John Ross and Emma struggle with their role in Pamela's overdose, relationships among the family are forever changed.

The dark cloud over Southfork continues to grow with the news of a family death. Meanwhile, Christopher and Heather's relationship is put to the test as John Ross tries to redeem himself with Pamela, who begins to face the real reasons behind her overdose. Elsewhere, Elena makes a drastic move to get justice for her family, putting John Ross directly in her crosshairs.

In a thrilling showdown, Elena finally confronts the Ewings for what J.R. did to her father and for framing Cliff. Sue Ellen, Pamela and Ann are shocked over the truths Elena exposes, realigning relationships and forcing Bobby to re-examine the steps he took to implement J.R.'s master plan. Meanwhile, Nicolas' plan to steal Ewing Global for the Cartel moves forward, setting the stage for a new battle.

As Ewing Global goes public, twists and turns abound while everyone scrambles to claim ownership. Pamela struggles with what to do now that she knows Cliff didn't really kill J.R., and Bobby seeks the aide of an old flame Tracey McKay (guest star Melinda Clarke) to help get back control of the company. Meanwhile, Judith and Ryland work to fix their own problems with the cartel, which ends up putting lives in the balance and aligning the Rylands and Ewings in a way no one ever expected.

While Christopher races to find Elena, Bobby is double-crossed by the cartel. No longer able to sit by, John Ross puts his own life on the line to attempt a rescue. Meanwhile, Nicolas tries to prove himself to Elena by making a deal with the authorities that puts him on a collision course with John Ross' plan and places both their lives in jeopardy.

In the electrifying third season finale, the Ewings and the Rylands finally force the cartel to pay the piper as some lives are saved and others are lost. Bobby and Sue Ellen form a new alliance to protect the family, which pits them against John Ross, who is still trying to regain control of Ewing Global and fix his marriage to Pamela. And Elena is pushed to the brink when she finds out the real depths of Nicolas' betrayal. As the season comes to an end, enemies are unmasked, new alliances are formed, and John Ross learns a shocking secret about J.R. that sends him halfway around the globe in search of a surprising new cohort.