After living through the Battle of Culloden, Jamie is at the mercy of British victors, until his past provides his only hope of survival. Meanwhile, a pregnant Claire attempts to adjust to life in 1940's Boston.
- To "join battle" is to engage in fighting; for a battle to join is for a battle to begin.
- After Rupert leaves to face the firing squad, Jamie says, "Slàn leat, a Ràibeirt..." which means "Goodbye, Rupert" in Gaelic.
- Special airing at San Diego Comic Con on July 21, 2017
- "Lord Hal Melton" is the credit given at the end of the episode, but it is not quite correct; Harold Grey, Earl of Melton, would be more accurate.