Outlander season 7, episode 5 further establishes the antagonistic relationship between Brianna and her coworker Rob Cameron. This is in line with the seventh book, An Echo in the Bone, where Cameron becomes Brianna's adversary. The episode also introduces the possibility of time travel, as Brianna discovers a tunnel portal. In the book, Cameron kidnaps Jemmy to learn the location of the Jacobite gold. Roger and Brianna decide to follow both outcomes, leading to their separation and a potential return to the 18th century.