As thousands flee Nazi-occupied Belgium, Harry, Stan and the rest of their unit take the last route out of France - the road to Dunkirk, where Grzegorz fights his way to the front of a queue to board a boat - only to be thrown back by angry soldiers. In Manchester, Douglas finds solace in his rapport with Jan, as his growing anxiety about Tom pushes him to the brink, while in Berlin the Rosslers grow ever more fearful for Hilda.

Harry has a second chance at saving Kasia from Warsaw. In Manchester, could Lois be set for happiness at last?