Harry leads his unit on the route to Dunkirk as they fight to make it onto the beach and aboard a ship. Grzegorz and Tom also struggle to survive the chaos of the evacuation.

On a Polish mission as part of the SOE, Harry grasps a second chance at saving Kasia from the horrors of Warsaw, while Lois looks set for happiness with new love, Vernon. Season finale.

June 1940. The Nazis have taken Paris with not a bullet fired. Webster and Albert's life in the city they love will never be the same again.

December 1939, and Tom fights for his life on board the HMS Exeter at the Battle of River Plate. Meanwhile, Harry and Lois have a more personal battle to fight.

The war reaches the sands of the Egyptian desert while bombs fall on Manchester, and Harry introduces an explosive force into Robina’s household, leaving her reeling.

As Harry struggles to adapt to the reality of desert combat, Lois still longs to leave home. In Paris, Henriette is in grave danger, and a mysterious stranger arrives at Robina’s.

As Stan and Rajib make a hasty retreat across the desert, Marga reasserts her commitment to the führer. Meanwhile, David is in peril in the skies over France.

Harry returns to Manchester, but Kasia is determined to leave. In Europe, Marga and Henriette must each make their escape, while north Africa becomes even more brutal for Rajib.