The Art of Knots Landing: ‘A Family Matter’

Abby and J.R. (Donna Mills, Larry Hagman) are seen in this 1981 publicity shot from “A Family Matter,” a second-season “Knots Landing” episode.

The Art of Dallas: ‘End of the Road, Part 1’

Afton (Audrey Landers) tempts J.R. (Larry Hagman) in this 1981 publicity shot from “End of the Road, Part 1,” a fourth-season “Dallas” episode.

The Art of Dallas: ‘Executive Wife’

J.R. and Sue Ellen (Larry Hagman, Linda Gray) are seen in this 1981 publicity shot from “Executive Wife,” a fourth-season “Dallas” episode.

The Art of Dallas: ‘The Prodigal Mother’

Rebecca (Priscilla Pointer) comes clean to Pam (Victoria Principal) in this 1981 publicity shot from “The Prodigal Mother,” a fourth-season “Dallas” episode.

The Art of Dallas: ‘Trouble at Ewing 23’

Bobby (Patrick Duffy) confronts J.R. (Larry Hagman) over the botched handling of a ransom demand in this 1980 publicity shot from “Trouble at Ewing 23,” a fourth-season “Dallas” episode.

The Art of Knots Landing: ‘Kristin’

Kristin and Kenny (Mary Crosby, James Houghton) are interrupted by his wife Ginger (Kim Lankford) in this 1980 publicity shot from “Kristin,” a second-season “Knots Landing” episode.

The Art of Dallas: ‘The Fourth Son’

Amos (William Windom), Ray’s long-lost daddy, turns up on the doorstep of his son (Steve Kanaly) in this 1980 publicity shot from “The Fourth Son,” a fourth-season “Dallas” episode.

The Art of Dallas: ‘The Venezuelan Connection’

Jock and Ray (Jim Davis, Steve Kanaly) attend a Fort Worth cattle auction in this 1980 publicity shot from “The Venezuelan Connection,” a fourth-season “Dallas” episode.

The Art of Dallas: ‘Who Done It?’

Sue Ellen (Linda Gray), after being arrested for J.R.’s shooting, has her mug shot taken in this 1980 publicity shot from “Who Done It?” a fourth-season “Dallas” episode.

The Art of Dallas: ‘Nightmare’

J.R. (Larry Hagman) is seen in this 1980 publicity shot from “Nightmare,” a fourth-season “Dallas” episode.