With their marriage on the rocks, Jock threatens to sell Ewing Oil if Ellie divorces him. Meanwhile, Clint tries to convince Sue Ellen to leave J.R.; Lucy's ego continues to threaten her marriage; and Pam becomes suspicious of Cliff.

Newlyweds Donna and Ray tries to fix Jock and Ellie's strained marriage. Meanwhile, J.R. continues to try to sell out Ewing Oil.

J.R.'s plan to sell is cut short by Jock and Ellie's reconciliation. Meanwhile, Jeremy Wendell sets out to get revenge against J.R.

Kristen makes her return to Dallas; Lucy and Mitch split up; and Cliff meets his mother.

JR is not convinced that Jamie is really a Ewing. Pam and Jackie see Mark's car.

After Pam receives some flowers from 'Mark' she wonders if he is still really alive.

Pam decides to hire a salvage expert to find out what really happened to Mark in the plane crash.

Pam is upset after she finds out about Bobby and Jenna's upcoming marriage plans.