Kim Darby (Angel) and James Stacy (Bob) met while filming this episode. They married on 3/20/68 but divorced shortly after, on-6/26/69. They had one child, a daughter.
Buck Taylor appears in Vengeance!: Part I (1967) as Leonard Parker 5 episodes before he joins the cast full-time as blacksmith / deputy Newly O'Brian, a role he would have for the duration of the show's run.
Quentin Tarantino devotes several pages to describe this two-part episode of "Gunsmoke" in detail in his novel, "Once Upon a Time in Hollywood" (inspired by his 2019 movie of the same title). It's all part of the backstory of James Stacy, the guest star of this episode and a significant supporting character in the novel.