Pam is determined to find out what's going on with Mark Graison's car and other disturbing signs. J.R. learns of Wendell's offer to Cliff. Donna, Ray, Jenna, and Bobby celebrate Donna's little oil venture. J.R. risks spoiling the good relations with Sue Ellen because of his suspicions of Jamie and constant confrontations with her. J.R. tricks Cliff out of the deal with Wendell. Bobby and Jenna make wedding plans. Bobby meets Mandy Winger. Lucy has a fight with Eddie Cronin's girlfriend. Wendell tries to come up with a new strategy after being turned down by Cliff. Mandy is used by Cliff for housekeeping duties. Pam receives flowers with Mark's name.