In the Gunsmoke episode "Another Man's Poison," the quiet town of Dodge City is disrupted when Sally Bogan, a woman with a complicated past, runs through the streets in a panic. Marshal Matt Dillon and his deputy Chester recognize her distress and learn that she is being pursued by Jeff, her first husband, who was presumed dead after a shipwreck four years prior. Sally is now married to Ben, but her past threatens to unravel her present as Jeff's unexpected return complicates her life.