The Art of Dallas: ‘The Sweet Smell of Revenge’

Bobby (Patrick Duffy) rescues a suicidal Pam (Victoria Principal) in this 1981 publicity shot from “The Sweet Smell of Revenge,” a fifth-season “Dallas” episode.

The Art of Dallas: ‘Little Boy Lost’

With Dusty (Jared Martin) watching, Sue Ellen (Linda Gray) attends a preliminary custody hearing for John Ross in this 1981 publicity shot from “Little Boy Lost,” a fifth-season “Dallas” episode.

The Art of Dallas: ‘Showdown at San Angelo’

Sue Ellen (Linda Gray) puts John Ross (Tyler Banks) to bed at the Southern Cross ranch in this 1981 publicity shot from “Showdown at San Angelo,” a fifth-season “Dallas” episode.

The Art of Dallas: ‘Missing Heir’

J.R. (Larry Hagman) watches Cliff (Ken Kercheval) recover the dead woman’s body from the Southfork swimming pool in this 1981 publicity shot from “Missing Heir,” “Dallas’s” fifth-season opener.

The Art of Dallas: ‘Ewing-Gate’

Kristin and J.R. (Mary Crosby, Larry Hagman) are seen in this 1981 publicity shot from “Ewing-Gate,” “Dallas’s” fourth-season finale.

The Art of Dallas: ‘Full Circle’

Kristin (Mary Crosby) checks into a posh hotel in this 1981 publicity shot from “Full Circle,” a fourth-season “Dallas” episode.

The Art of Dallas: ‘The New Mrs. Ewing’

J.R. and Leslie (Larry Hagman, Susan Flannery) watch Bobby’s televised victory speech in this 1981 publicity shot from “The New Mrs. Ewing,” a fourth-season “Dallas” episode.

The Art of Dallas: ‘Lover, Come Back’

Sue Ellen (Linda Gray) finds Dusty (Jared Martin) again in this 1981 publicity shot from “Lover, Come Back,” a fourth-season “Dallas” episode.

The Art of Knots Landing: ‘The Loudest Word’

Valene (Joan Van Ark) discuss her cancer surgery with Bobby (Patrick Duffy) in this 1981 publicity shot from “The Loudest Word,” a second-season “Knots Landing” episode.

The Art of Dallas: ‘End of the Road, Part 2’

Lucy (Charlene Tilton) is seen wearing her bridal gown in this 1981 photograph from “End of the Road, Part 2,” a fourth-season “Dallas” episode.