At Ticonderoga, Jamie and Claire prepare for an imminent British assault. Roger compiles information about time travel while Brianna earns the respect of her coworkers.

Jamie and Claire help civilians flee Ticonderoga after the fort falls into British hands. Roger discovers the identity of the mysterious 'Nuckelavee'.

Jamie prepares to face British forces in battle. Roger and Brianna question Buck MacKenzie’s intentions in the 20th century. William fights in the First Battle of Saratoga.

Claire turns to John Grey for comfort as they process difficult news. Ian and Rachel discuss their love and their future. Brianna confronts an intruder at Lallybroch.