After giving a female hitchhiker a ride, Sid is arrested for rape. Sid's sister Abby comes to Knots Landing.

Sid is arraigned on rape charges, while Gary and Abby run Knots Landing Motors in Sid's absence.

After Gary tries to help Earl stop drinking, Val feels abandoned. Kenny and Ginger spend the night together.

Richard works with a powerful attorney from Chicago in the hopes of becoming a partner.

Diana's first sexual experience is a disaster. Richard and Abby have an affair.

Karen and Sid disagree about their son Michael, who has a discipline problem at school.

Abby meets with J.R. about Gary's money problems, but J.R. has something else on his mind.

Jeff threatens to take the kids away from Abby. Laura is tempted to have an affair with a client.

Ginger's sister Jill is left in a coma after smoking some marijuana Eric brought to a party.

Sid refuses J.R.'s offer of a partnership in Sid's experimental engine, but Abby readies to make her own deal.

Abby locates Jeff and concocts a scheme to get her children back. Richard is asked to arrange entertainment.

Karen's ex-boyfriend returns and claims to be Diana's father. Laura receives a generous gift from Scooter.

Lilimae leaves for Las Vegas. After Richard takes out his anger on Laura, she seeks comfort with Scooter.

Val's former boyfriend leaves his troubled 11-year-old stepdaughter with the Ewings and leaves town.

Val must rebuff advances from a cafe owner. Abby and Gary consummate their affair.

Val confronts Gary and Abby about their affair. Richard prepares to leave the hospital.

Gary's affair with Abby deeply hurts Val. Karen investigates Sid's death and confronts a U.S. attorney.

On the eve of the reading of Jock's will, J.R. visits and creates mystery for everyone except Abby.

Gary makes a few investments that infuriate Abby. Karen fears her relationship with Mack is moving too fast.

Diana is admitted to the hospital with a mysterious disease. Abby makes a deal with a record producer.

After Abby is asked to donate a kidney to Diana, she faces an agonizing moral decision.

When Diana discovers Chip's identity, she questions their relationship. Val and Ben suffer a setback.

Chip and Diana are traced to a deserted shack in Oklahoma. Gary hires Laura to work for his company.

Gary and Abby marry, and Val is stunned by the news. Mack begins his new job on the crime commission.

Gary freezes the company assets and locks the office. Val's doctor instructs her not to go to El Salvador.

Mack tries to get Abby to discuss the Wolfbridge Group, as the organization chases Gary. Ben is found wounded.

Abby begins to understand the truth about Val's babies. Mack and Karen host Thanksgiving for their friends.

Cathy and Joshua get married. Gary receives an unusual proposition concerning Empire Valley.