Filming in Cornwall

Several months have passed. With their lives on the line, Ross and his friends must launch their most daring plan yet, to save themselves and the country from enemies both at home and abroad.

Ross seeks vengeance in London, while Demelza discovers the identities of the smugglers. Caroline puts her insecurities aside to help a friend, drawing perilous attention to herself in turn.

Geoffrey Charles and Cecily form a desperate plan and Demelza makes a shocking discovery at the mine. With Ned’s trial looming heavy, Ross pleads for Dwight’s help.